Observer based leader-following consensus of second-order multi-agent systems with nonuniform sampled position data

This paper deals with the leader-following consensus problem of multi-agent systems with the consideration that each agent can only transmit its position state to the neighbors at irregular discrete sampling times. In the proposed algorithm, a continuous-discrete time observer is designed for the continuous estimation of both position and velocity from the discrete position information of the neighbors. These estimated states are then used for designing a continuous control law which solves the leader-following consensus problem. Moreover, the dynamics of the leader is not fixed and can be controlled through an external input. The stability analysis has been carried out by employing the Lyapunov approach which provides sufficient conditions to tune the parameters according to the maximum allowable sampling period. The developed algorithm has been simulated and then tested on an actual multi-robot system consisting of three differential drive wheeled robots. Both simulation and hardware results validate the effectiveness of the control algorithm.     

Exploring the Use of Cases and Case Methods in Influencing Elementary Preservice Science Teachers' Self-Efficacy Beliefs

In this study, we hypothesize that cases demonstrating exemplary practice in the science classroom can be used as a source for learning content and pedagogical skills that will improve teachers' self-efficacy beliefs. Twelve preservice elementary science teachers are followed as they participate in a case and case method activity illustrating the Grade 7 topic of robotics and fluids. While there was little evidence to show improvements in content knowledge, results indicate that the case acted as a boundary object for brokering between individual experiences and those found in the science teaching community by scaffolding for multiple points of entry, bridging the theory practice gap and offering beginning teachers more immediate access to the community of already practicing teachers.

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Global references,local translation: adaptation of the Bologna Process degree structure and credit system at universities in Cameroon

This article uses temporal comparison and thematic analytical approaches to analyse text documents and interviews, examining the adaptation of the Bologna Process degree structure and credit system in two sub-systems of education in Cameroon: the Anglo-Saxon and the French systems. The central aim is to verify whether such adaptation has replaced, re-enforced or modified existing practices. Secondly, the article analyses the factors that have influenced this adaptation. The results highlight the idea that education systems may demonstrate a level of awareness about global practices, but these practices are interpreted in their local contexts; thus, policy-makers ‘think globally but act locally’.     

Raising Reading Standards: What is the Headteacher's Role?

The role of the headteacher has been identificed as one of the key characteristics of schools which achieve high standards of reading. Eve Bearne here presents the findings of an evaluation which reveals ways in which headteachers influence reading standards, particularly through in-service provision. The evaluation's aim was to assess the effectiveness of in-service courses in raising standards of achievement in reading and to consider the implications for school provision and future in-service arrangements. One factor which emerged strongly was the importance of the headteacher's role in managing reading provision in the primary school. It appeared that where the headteacher had taken a proactive role, developments were likely to be more firmly and permanently established and staff more secure in extending their practice.     

Effectiveness of an Intensive Learning Skills Course for University Students on Restricted Enrolment

Prior to the commencement of the 1994 academic year, University of Auckland students who had failed one‐half or more of their papers in the previous year were invited to attend a four‐day intensive learning skills course conducted by the Student Learning Centre of the University. The course covered various topics such as effective time management and study organisation, preparing for and taking tests and exams, memory and concentration, and writing skills. A total of 74 students attended the course. After final examinations, the results of these students were analysed. As a group these students significantly improved on their previous year's pass rates. Furthermore, their pass rates were significantly better than those of a randomly selected group of students who were in a similar situation with regard to their previous year's academic performance, but who did not attend the course.     

Student voice in an age of ‘security’?

ABSTRACT

As student voice has become popularised as a school reform strategy, it has been critiqued as another instrumental strategy that schools may use to govern students’ speech, bodies and subjectivities. What necessitates further analysis is the relation between student voice and regulatory modes of governance entwined with geopolitical attention to security in and beyond disciplinary institutions. In this article, ethnographic accounts from students at a comprehensive coeducational public secondary school where student voice was adopted as a school reform strategy are read with and through a policy context concerned with security (in particular, the Australian Government’s Schools Security Programme and the Living Safe Together policy strategy), and Foucault’s problematisations of ‘security’ in lectures published in Security, Territory, Population. It is argued that student voice is entwined with contemporary security policies and practices; securing the material borders of the school is inextricable from limits placed on the discursive articulation of feeling in and beyond school gates.     

Creating Peace by Confronting Prejudice: Examining the Effects of a Multicultural Communication Skills Group Intervention

This study investigated the effects of a Multicultural Relationship Enhancement Workshop on American education majors' ability to confront prejudice in order to create more peaceful communities in school settings. Due to the diverse group membership, participants were provided an opportunity to practice communication skills in a multicultural context that emphasized a social justice perspective. A repeated measures design with random assignment of participants to experimental (n = 26) and wait-list control (n = 22) groups was employed. Participants were studied at three different points in time, in five-week intervals, with the experimental group participating in the workshop during the first five-week interval and the control group receiving the treatment during the second five-week interval. The repeated measures analysis of variance revealed significant time by treatment interaction effects between Times 1 and 2 on a measure of communication skills in multicultural situations. The intervention is discussed in the context of policies that promote cultures of peace.