Design of a prototype underwater research platform for swarm robotics

To perform under water robotic research requires specialized equipment. A few pieces of electronics atop a set of wheels are not going to cut it. An underwater research platform must be waterproof, reliable, robust, recoverable and easy to maintain. It must also be able to move in 3 dimensions. Also it must be able to navigate and avoid obstacles. Further if this platform is to be part of a swarm of like platforms then it must be cost effective and relatively small. To purchase such a platform can be very expensive. However, for shallow water, a suitable platform can be built from mostly off the shelf items at little cost. This article describes the design of one such underwater robot including various sensors and communications systems that allow for swarm robotics. Whilst the robotic platform performs well, to explore what many of them would do, that is more than are available, simulation is required. This article continues to study how best to simulate these robots for a swarm, or system of systems, approach.

'I'm your new teacher' : the impact of teacher mobility on educational opportunities for marginalised students

This article provides an alternative perspective on what it means to 'do school' in a disadvantaged community, particularly in the way that disadvantage is reproduced for marginalised students. It explores the mobility of teachers (temporarily) working in a small secondary school located in an economically depressed regional community in Australia, characterised by high levels of unemployment, high welfare dependency and a significant indigenous population. Like many disadvantaged schools, the school has difficulty attracting and retaining high ability teachers, instead relying on a high turnover of often-reluctant staff who are sent to (or feel compelled to) fill positions unable to be resourced through teacher choice procedures. Drawing on parent, student, and teacher interviews, we ask: how does teacher mobility in this context influence the educational opportunities of students who are 'on the margins' of school success and of the socio-economic structure? Specifically, we explore the ways that teacher mobility can reproduce disadvantage by limiting students' access to the dominant cultural capital. We argue that educational policies and politics that reward teacher mobility for moving out of these communities, work to disadvantage students. What is needed is a transformation in policies governing staff placements to establish alternatives that redefine the reward system for teachers in ways that permit these students to succeed.

The emergent structure of feeling : what does it mean for critical educational studies and research?

Critical research in education is not what it used to be. It must now engage with a differently structured and globalized world with different social and material conditions for its peoples. This paper sets out to name the contemporary structure of feeling in which education researchers now work, particularly in terms of what now is to be the object of their educational theorizing and research and what are to be the intellectual resources brought to bear on such activity. The intention is to open up debate, recognizing that there are no easy answers and yet acknowledging the need for answers to be attempted. It is, therefore, an invitation premised on an optimism of the will to complement legitimate pessimism of the intellect. It concludes that a critical engagement with these matters demands a modernist/postmodernist, reconstructive/deconstructive reflexivity in the mobilizing of a new sociological imagination applied across the broad spectrum which is educational research.

Democratic educational leadership in contemporary times

This article seeks to identify the economic and social conditions confronting officially designated education leaders and to set out the parameters for how they might respond. Specifically, it suggests that education leaders are currently faced with changing bases of social cohesion, changing instruments of (economic) control and changing forms of organisation. Informed by these changing conditions and by a recognitive view of social justice (Young 1990; Gale and Densmore 2000), the article makes a case for educational leadership that is characterised by distinctly democratic directions and influences. In particular, democratic leaders are seen as those that enable the formation of social, learning and culturally responsive public educational institutions, in part by enabling contextually-specific struggles to determine what is needed, and by developing a politically informed commitment to justice for all.

Beyond caricature : exploring theories of educational policy production and implementation

Since the mid 1980s there has been a growing interest amongst sociologists in the study of education policy, which has coincided with a decline within the tradition of educational administration - having been subsumed by educational management - of 'detailed historical work, or work concerned primarily with politics or policy content' (Olga 1987. p. 138). While in the past other traditions associated with social policy and social administration, government and politics. and the history of education have also been concerned with education policy. most recent and substantive work (for example. Olga 1987 1990. Dale 1989, 1992, Dale & Olga 1991, 1993. Ball 1990, 1993, Bowe, et al. 1992. Lingard 1991,1993)has come "from within the sociology of education. especially from those working within, or influenced by, the 'new' sociology of education, and, especially, those of a Marxist or neo-Marxist persuasion or at least concerned with the relationship of the state to education as a central problem (Olga 1987. p.139)".

A hybrid approach for fault tolerance in robotics

This paper studies the difference between the human behaviours for fault tolerance with a pseudo inverse reconfiguration approach for fault tolerance of robotic arms. If this difference is well understood then it can be used to introduce a hybrid approach for fault tolerant motion of robotic arms. The proposed approach is expected to combine human fault-tolerance dexterity and advantages of a model based fault tolerance. The main aim is to add human dexterity for fault tolerance of robotic arms.

The impression that I get : educational inclusion explored through the voices of young people with vision impairment

Despite the notion of educational inclusion of students with disabilities increasing in popularity, the day-to-day reality of its effectiveness remains mostly unknown. This paper reports key findings of a small-scale qualitative study that was conducted with a group of young people with vision impairment who attended an inclusive secondary school. The aim of the research was to ascertain their voiced experiences of their inclusion. Relevant to the study was the researcher’s insider status, which allowed for his unique insight and shared experiences with participants to influence data collection and analysis. The students reported a constant trade off that occurred between their aspirations for access and autonomy and practices of other stakeholders in the school that both facilitated and inhibited their inclusion. In sum, the students’ inclusion was ineffective because of habitual inhibiting actions of others. Recommendations are made based on Slee’s (2001) call for altered teaching and learning realities to promote educational inclusion, and a model of social justice that could bring about increased student agency (Higgins, Macarthur & Kelly, 2009).

Automatically learning structural units in educational videos with the hierarchical hidden Markov models

In this paper we present a coherent approach using the hierarchical HMM with shared structures to extract the structural units that form the building blocks of an education/training video. Rather than using hand-crafted approaches to define the structural units, we use the data from nine training videos to learn the parameters of the HHMM, and thus naturally extract the hierarchy. We then study this hierarchy and examine the nature of the structure at different levels of abstraction. Since the observable is continuous, we also show how to extend the parameter learning in the HHMM to deal with continuous observations.

Content structure discovery in educational videos using shared structures in the hierarchical hidden Markov models

In this paper, we present an application of the hierarchical HMM for structure discovery in educational videos. The HHMM has recently been extended to accommodate the concept of shared structure, ie: a state might multiply inherit from more than one parents. Utilising the expressiveness of this model, we concentrate on a specific class of video -educational videos - in which the hierarchy of semantic units is simpler and clearly defined in terms of topics and its subunits. We model the hierarchy of topical structures by an HHMM and demonstrate the usefulness of the model in detecting topic transitions.

On the extraction of thematic and dramatic functions of content in educational videos

In this paper, we propose novel computational models for the extraction of high level expressive constructs related to, namely thematic and dramatic functions of the content shown in educational and training videos. Drawing on the existing knowledge of film theory, and media production rules and conventions used by the filmmakers. we hypothesize key aesthetic elements contributing to convey these functions of the content. Computational models to extract them are then formulated and their performance evaluated on a set of ten educational and training videos is presented.