Excluding students from classroom: Teacher techniques that promote student responsibility

Students who continuously misbehave are frequently excluded from class, allowing them time to reflect on their inappropriate behavior. This paper examines students’ perceptions of the teacher’s behavior toward them prior to, during, and after the exclusion, focusing on teachers’ explanations, punishments, and follow-up conversations. The results indicate that students who do not accept responsibility for being excluded think that their teachers’ are to blame. To convince students to accept responsibility for their acts, teachers must explain why the exclusion is necessary, warn and punish before excluding a student, and hold a follow-up conversation, highlighting the impact of the misbehavior on classmates.     

Optimal Nash tuning rules for robust PID controllers

In this paper, we propose tuning rules for one degree-of-freedom proportional-integral-derivative controllers, by considering important aspects such as the trade-off in the performance in the servo and regulation operation modes and the control system robustness by constraining the maximum sensitivity peak. The different conflicting objectives are dealt with by using a multi-objective optimization algorithm to generate the trade-off optimal solutions. In this context, a simple tuning rule is determined by using the Nash solutions as a multi-criteria decision making technique. The Nash criteria is shown to provide convenient trade-off solutions for the controller tuning problem. Illustrative simulation examples show the effectiveness of the method.     

Andres Bonifacio: proletarian hero of the Philippines and Indonesia

The concluding chapter of Tan Malaka’s (1897–1949) large philosophical work entitled Madilog: Materialisme, Dialektika, Logika contains interesting reflections on the extent and scope of the future liberated and sovereign Indonesian nation and on the concept of “Indonesian” heroism and nationality. However, most striking of all is the uppermost position he allots in his schema for Philippine national heroes such as Dr. Jose Rizal, the patriot and writer, and Andres Bonifacio, the leader and founder of the Katipunan, the most successful Philippine revolutionary anti-colonial organization.     

Sprinting analysis of elite soccer players during European Champions League and UEFA Cup matches

It has been suggested that assessment of high-intensity activities during a match is a valid measure of physical performance in elite soccer. Recently, sprinting activities have been analysed in more depth. The aim of this study was to develop a detailed analysis of the sprinting activities of different playing positions during European Champions League and UEFA Cup competitions. Altogether, 717 elite outfield soccer players were evaluated throughout 2002-2006 using ProZone? (Leeds, UK). Sprinting (explosive and leading) was analysed for each playing position. To compare positional differences, a Kruskal-Wallis analysis was performed. Differences were found among positions for total number of sprints and total sprint distance covered: wide midfielders > (attackers = wide defenders) > central midfielders > central defenders (P < 0.001), as well as for explosive sprints: (wide midfielders = attackers = wide defenders) > central defenders, wide midfielders > central midfielders > central defenders and attackers = wide defenders = central midfielders (P < 0.001), and leading sprints: wide midfielders > (attackers = wide defenders) > central midfielders > central defenders (P < 0.001). For each group, there were no differences in ratio of explosive to leading sprints. Wide midfielders performed a higher number of sprints in all five distance categories than all other positions. This study showed that sprinting characteristics are influenced by position. Wide midfielders have to complete additional high-intensity activities during training sessions compared with the other positions to achieve the performance level required during the match.     

Postural control quantification in minimally and moderately impaired persons with multiple sclerosis: The reliability of a posturographic test and its relationships with functional ability

BackgroundPostural control has been associated with the functional impairment in persons with multiple sclerosis (pwMS). However, there is a need for reliable methods to assess postural control in early stages of the disease, when subtle changes can be difficult to detect. The aims of this study were to assess the absolute and relative reliability of a standing and a sitting posturographic protocol in minimally (Expanded Disability Status Scale ≤ 2) and moderately (2.5 ≤ Expanded Disability Status Scale ≤ 4) impaired pwMS, and to analyze relationships among postural control and functional mobility and gait performance.MethodsTo assess postural control in an upright stance, 14 minimally and 16 moderately impaired pwMS performed six 70 s trials in tandem stance, 3 with their weaker leg behind (TS_WL) and 3 with their stronger leg behind (TS_SL). Additionally, participants completed five 70 s trials using an unstable sitting protocol (US) to assess trunk stability. The mean radial errors of TS_WL, TS_SL, and US trials were calculated as postural control indexes. Furthermore, participants performed the Timed Up and Go test (TUG) and the Timed 25-foot Walk test (T25FW) to measure their functional mobility and gait speed, respectively. Reliability was evaluated using the intraclass correlation coefficient (ICC_3,1) and the standard error of measurement (SEM). Analyses of variances were carried out to assess between-group differences. Hedges’ g index (d_g) was used to estimate the effect size of differences. Pearson correlation analyses (r) were performed to examine the relationships among the postural control and the functional tests.ResultsPosturographic tests showed a high reliability in both minimally (0.87 ≤ ICC ≤ 0.92; 9.32% ≤ SEM ≤ 11.76%) and moderately (0.80 ≤ ICC ≤ 0.92; 10.33% ≤ SEM ≤ 15.33%) impaired pwMS. Similarly, T25FW and TUG displayed a high consistency in minimally (0.89 ≤ ICC ≤ 0.94; 3.43% ≤ SEM ≤ 5.17%) and moderately (0.85 ≤ ICC ≤ 0.93; 5.57% ≤ SEM ≤ 6.56%) impaired individuals. Minimally impaired pwMS showed a better performance on the TUG, T25FW, and TS_WL than moderately impaired individuals (p < 0.05; d_g ≥ 0.8). The TS_WL, TS_SL, and US variables correlated with TUG scores (0.419 ≤ r ≤ 0.604; p < 0.05), but TS_WL also correlated with T25FW scores (r = 0.53; p < 0.01). Furthermore, US scores correlated with both tandem stance parameters (TS_WL: r = 0.54, p < 0.01; TS_SL: r = 0.43, p < 0.05).ConclusionTandem and sitting posturographic tests provide reliable measures of postural control in pwMS, even in individuals with a homogeneous disease profile. Gait speed, functional mobility, and weaker leg status seem decisive in assessing the degree of physical activity limitation in pwMS. Finally, although trunk stability does not seem to be so affected by the course of the disease, it remains relevant for postural control and functional capacity.     

Curriculum reform in post-1990s sub-Saharan Africa

The article uses both primary and secondary sources to examine why learner-centredness, outcomes- and competency-based education and national qualifications frameworks were favourably received at local level in sub-Saharan Africa but have not resulted in widespread change in classroom practice. It argues that they found local favour because they were not entirely new ideas, and were ambiguous enough to be seen as key vehicles for achieving not so much educational, as economic, social and political goals. It suggests that the failure of implementation could lie in expectations that education would lead to transformation without paying necessary attention to implementation and capacity.     

Cultural diversity in community sport: An ethnographic inquiry of Somali Australians’ experiences

Sport organisations aim to grow the participation of culturally and linguistically diverse communities, including newly arrived people from refugee backgrounds. Drawing on multi-sited ethnographic research conducted by the author at community sport organisations in the multicultural city of Melbourne, this paper examines the key factors that affect the sport participation experiences of Somali Australians. It is shown that interpersonal and structural barriers to sport participation predominate, and that the significance of these barriers varies according to age, gender and time in Australia. The paper concludes that in order to foster inclusive sporting environments in which people from refugee backgrounds can participate in a safe, comfortable and culturally appropriate way, refugee settlement needs to be understood as a two-way process of mutual accommodation requiring adaptation on the part of both the migrant and the host society.     

Why did you do that? Teachers explain the use of legal aggression in the classroom

Teachers (n = 233) who employ aggressive classroom management strategies were asked to theorise about their use. Levels of support for three theoretical explanations for aggressive behaviour were assessed via a 26 item scale. The items loaded to three factors: Attribution Theory; Efficacy Theory and Attachment Theory. Results indicated most teachers, 42%, supported Attribution, 34% supported Efficacy, and 33% supported Attachment as an explanation for aggressive behaviour. Moreover, 14% of teachers support all theories simultaneously, whilst 27% of teachers rejected all theories. The implications of these findings are that many teachers may be theoretically blind when it comes to classroom management: hence re- rather than pro-active. The importance of this finding for professional development providers and future qualitative research design is discussed.     

Output-feedback binary adaptive control of MIMO systems using monitoring function

The problem of adaptive control design for multivariable linear time-invariant plants with unknown control direction is considered. A solution is proposed based on the SDU factorization of the high frequency gain matrix (HFG) and the monitoring function approach. The adaptation scheme is the binary model reference adaptive control (BMRAC) which utilizes parameter projection and sufficiently high adaptation gains. The signs of the leading principal minors of the HFG define the control directions, and the lack of knowledge of which is a major challenge in the multivariable framework. The role of the monitoring function is to monitor the output error transient and then provide the necessary changes of the adaptation gain signs to guarantee a stable adaptive control. In addition to proving the signal boundedness of the resulting closed-loop system, the output tracking error is shown to be asymptotically as well as exponentially practically stable, i.e., exponentially stable with respect to a small residual compact set of size inversely proportional to the BMRAC adaptation gain. The latter implies good transient properties of the output tracking error in contrast to conventional adaptive laws which only guarantee asymptotic stability but can lead to extremely slow error convergence. The extension of the proposed approach to matched disturbances is also briefly discussed following the classical paradigm of disturbance estimators. Numerical results with a visual servoing application illustrate the efficiency of the proposed method.