Offensive agility techniques performed during international netball competition

Netball is a sport characterised by sharp changes-of-direction to break free from opponents. The ability of players to use changes-of-direction to evade opponents is, therefore, an important aspect of attacking play. The purpose of this study was to examine the performance and outcomes of offensive agility techniques utilised by netball players. Offensive agility techniques were assessed for the type of manoeuvre performed and performance outcome using video footage of three international matches. Mid and attacking playing positions performed a greater frequency of manoeuvres than defensive playing positions. The type of manoeuvre was found to have no influence on the performance outcome. The performance outcome is likely influenced by additional factors, such as location on the court, time constraints, or features of defensive opponents. Overall, the use of offensive agility manoeuvres was identified as an important aspect of attacking play in netball, particularly for the mid and attacking playing positions.

Challenges for undergraduate speech pathology students undertaking cross-cultural clinical placements

Background: Two Australian undergraduate speech pathology students completed a series of clinical placements working with people with complex communication needs in cross-cultural contexts. Aims: To describe the challenges that the students faced and how best to prepare future students for such experiences. Methods & Procedures: The students completed the placements in Thailand, Nepal, Bangladesh, India and South Africa. They used personal journaling to record their experiences. The students used the journals as the basis for reflective discussion when considering the challenges they experienced in applying their knowledge and skills. Outcomes & Results: The challenges were (1) to prepare adequately ahead of the placements; (2) to select appropriate models of service delivery; (3) to use existing service approaches, resources and infrastructure appropriately; (4) to access professional support; (5) to define their professional role; (6) to manage variable shared language proficiency; (7) to adapt personally; and (8) to work using an undergraduate level of knowledge, skills and experience. Conclusions: The students encountered challenges related to their clinical preparation and their capacity to adapt in both a professional and personal sense. Future students preparing to undertake such placements need to attain at least minimum clinical competencies before placements. They will be helped if they have some clinical experience in working with people with complex communication needs in cross-cultural contexts, information about the cultures they will visit, and if they set professional and personal learning goals for each clinical placement. This preparation will aid students in maximizing their learning experience.

AAC and Australian speech pathologists: a report on a national survey

A total of 971 speech pathologists from across Australia participated in a survey that investigated their knowledge of augmentative and alternative communication (AAC), their AAC practices, the AAC resources available to them, and their preferred format for further education. The results indicated that 98% of respondents had at least some knowledge of AAC and only 13% never recommended AAC in their practice. However, 29% had recommended a device they had never seen and 36% indicated that they would not recommend AAC for a client who was presymbolic. Access to resources appeared to be related to the location of respondents in relation to a capital city. Overall, there appeared to be a lack of AAC expertise within the profession in Australia. A lack of interest in obtaining further information on AAC and an unwillingness to enroll in further education highlighted the need for collaboration among the professional organization, training institutions, and employment bodies in ensuring adequate levels of knowledge and skills among speech pathologists.

After Charlie: free speech and the political economy of communication

Three significant events at the start of 2015 have put freedom of speech firmly on the global agenda. The first was the carry-over from the December 2014 illegal entry to the Sony Corporation’s file servers by anonymous hackers, believed to be linked to the North Korean regime. The second was the horrible attack on journalists, editors, and cartoonists at the French satirical magazine, Charlie Hebdo on 7 January. The third was the election of leftwing anti-austerity party Syrzia in Greece on 25 January.While each event is different in scope and size, they are important to scholars of the political economy of communication because they all speak to ongoing debates about freedom of expression, freedom of speech and freedom of the press. I name each of these concepts separately because, despite popular confusion, they are not the same thing (Patching and Hirst, 2014) . Freedom of expression is the right to individual self-expression through any means; it is an inalienable human right. Freedom of speech refers to the right (and the physical ability) to utter political speech, to say what others wish to repress and to demand a voice with which to express a range of social and political thoughts. Freedom of the press is a very particular version of freedom of expression that is intimately bound with the political economy of speech and of the printing press. Freedom of the press is impossible without the press and, despite its theoretical availability to all of us, this principle is impossible to articulate without the material means (usually money) to actually deploy a printing press (or the electronic means of broadcasting and publishing).Freedom of expression is immutable; freedom of speech subject to legal, ethical and ideological restriction (for better, or worse) and freedom of the press is peculiar to bourgeois society in that it entails the freedom to own and operate a press, not the right to say or publish on a level playing field. Access to freedom of the press is determined in the marketplace and is subject to the unequal power relationships that such determination implies.It is fitting to start with the Charlie Hebdo massacre because the loss of 17 lives makes this the most chilling of the three events and demands that it be given prominence in any analysis. No lives have been lost yet because Sony’s computers were hacked and the election of Syriza has not (yet) led to mass deaths in Greece.

Frequency-domain beamformers using conjugate gradient techniques for speech enhancement

A multiple-iteration constrained conjugate gradient (MICCG) algorithm and a single-iteration constrained conjugate gradient (SICCG) algorithm are proposed to realize the widely used frequency-domain minimum-variance-distortionless-response (MVDR) beamformers and the resulting algorithms are applied to speech enhancement. The algorithms are derived based on the Lagrange method and the conjugate gradient techniques. The implementations of the algorithms avoid any form of explicit or implicit autocorrelation matrix inversion. Theoretical analysis establishes formal convergence of the algorithms. Specifically, the MICCG algorithm is developed based on a block adaptation approach and it generates a finite sequence of estimates that converge to the MVDR solution. For limited data records, the estimates of the MICCG algorithm are better than the conventional estimators and equivalent to the auxiliary vector algorithms. The SICCG algorithm is developed based on a continuous adaptation approach with a sample-by-sample updating procedure and the estimates asymptotically converge to the MVDR solution. An illustrative example using synthetic data from a uniform linear array is studied and an evaluation on real data recorded by an acoustic vector sensor array is demonstrated. Performance of the MICCG algorithm and the SICCG algorithm are compared with the state-of-the-art approaches.