The main objective of this paper is to drive a rotary inverted pendulum by following a desired navigation instruction. This navigation is commanded by the user through a new electromagnetic device which is allowed to perturb the pendulum from its upright position. This apparatus consists of an electronic magnetic driving circuit to introduce commands and realized via two operated magnetic coils. So, the external programmed magnetic perturbation can be seen as external commandments. Therefore, the control problem statement is solved via a modified regulation control implementation, to maintain the pendulum on its upright position and giving free manipulation of the base of the rotary inverted pendulum. Hence, by using the corresponding H∞-linear matrix inequality technique, a static state controller is designed and tested experimentally so supporting our findings. 相似文献
Background: In many countries around the world, physical education (PE) has been identified as a marginalized subject. PE teachers have been found to feel negative consequences associated with marginality, such as stress, burnout, and early career attrition. Recent evidence also indicates that physical educators can develop a sense of perceived mattering both in relation the subject of PE and their role as that teacher of that subject. Less is known, however, about the relationship between perceived mattering and marginalization, and how teachers navigate social messages associated with each that they receive while teaching. Role socialization theory has emerged as an approach to studying teachers’ experiences in school environments, and can be used to understand their experiences with marginality and mattering.
Aims: The purpose of this study was to understand how the social environment of schools influences PE teachers’ perceptions of marginalization and perceived mattering, and how these two constructs interact.
Method: The investigation was conceptualized as an interview study, and framed using a social constructivist epistemology. Participants included 30 in-service PE teachers (16 males, 14 females) from the Midwest region of the US. Data were collected using in-depth qualitative interviews, and analyzed through a collaborative approach to data analysis that drew upon both inductive and deductive forms of analysis.
Results: Participants identified experiences with both perceived mattering and marginalization in their work, and noted that sometimes these messages were contradictory. Some participants felt the effects of marginalization as their discipline was viewed as a dispensable commodity that is only meaningful for the service it provides to other teachers (e.g. gives elementary classroom teachers a break for planning). Some of the teachers internalized their marginal status and began to see their primary function as supporting the work of teachers in other subjects. Nevertheless, the participants derived a sense of mattering by building relationships with colleagues, administrators, and students, and by advocating for the discipline. Teachers also felt validated when colleagues acknowledge their attempts to implement effective practices, but struggled when working with colleagues who are resistant to change.
Conclusions: PE teachers experience both marginalization and perceived mattering, which are shaped largely by social interactions within the school environment. This study specifically lends to the view of marginalization and perceived mattering as two constructs at opposite ends of a continuum, rather than a binary conceptualization. This suggests that it could be the summation of marginalizing experiences and those that promote mattering that lead physical educators to develop overall impressions of their role in schools. Furthermore, this study adds to the literature indicating that physical educators may eventually internalize feelings of marginalization when consistently told that they do not matter. This has implications related to the washout effect whereby teachers who no longer feel as if they are making meaningful contributions to children’s education may compromise their teaching practice. 相似文献
Purpose: Given the significant challenges facing today’s physical educators, the purpose of this study was to examine the expectations of induction teachers and identify the factors in both their personal and organizational environments enhanced or constrained their assimilation into the field during their 1st year. Method: Using occupational socialization theory as a guide, data from demographic surveys and a series of formal interviews with participants at the beginning, middle, and end of the school year were inductively analyzed for theme development. Results: Results revealed positive acculturation experiences and unity regarding the purpose of physical education as preparing students to be fit for a lifetime. Barriers were noted to be family and personal crises, role conflict, isolation, marginalization, issues with classroom management and discipline, and difficulties in developing positive relationships with stakeholders. Enhancers were identified as positive interactions and rapport with students, colleagues, and administrators and favorable individual dispositions. Conclusion: Implications indicate a need for purposeful physical education teacher education training to proactively address these barriers during professional preparation as well as the creation of additional support systems for beginning teachers. 相似文献
The purposes of this study were to examine the test-retest reliability of the PACER 20-m, multistage shuttle run and to examine the equivalence reliability of the mile run/walk and PACER from both a criterion-referenced and norm-referenced framework. All fourth- and fifth-grade children (N = 266) from one public school were administered two trials of the PACER and one trial of the mile run/walk (mean age = 10.5 ± 0.5 years). The percent of boys that passed the PACER (68%) was similar to the percent of boys that passed the mile run/walk (66%); however, the percent of girls that passed the PACER (96%) far exceeded the percent of girls that passed the mile run/walk (65%). Criterion-referenced reliability was estimated with proportion of agreement (Pa) and modified kappa (Kq) using FITNESSGRAM® (Cooper Institute for Aerobics Research, 1992) standards. Pa = .97 (Kq = .94) for girls and Pa = .82 (Kq = .65) for boys. The high level of agreement for girls was found because of the low criterion-referenced standards, which allowed 99 of 104 girls to pass both trials of the PACER. Criterion-referenced equivalence reliability of the mile run/walk and PACER was moderate for boys (Pa = .83, Kq = .65) and low for girls (Pa = .66, Kq = .33). The low level of classification agreement for girls was also explained by the low standards for the PACER for this age group. Thirty-four percent of the girls that passed the PACER failed the mile run/walk. Norm-referenced test-retest reliability of the PACER was estimated with an intraclass correlation (Rxx) from a one-way analysis of variance model. Reliability estimates were high for two trials (Rxx = .89 for boys and Rxx = .89 for girls) and acceptable for one trial (Rxx = .80 for boys and Rxx = .79 for girls). Pearson correlations between the mile run/walk and PACER were moderate (-.59≤r≤-.67). The moderate correlations between the mile run/walk and PACER and the low criterion-referenced... 相似文献
The purpose of the study was to examine the relationship between achieving The National Board for Professional Teaching Standards certification and feelings of marginality of physical education teachers. Data sources included a focus group interview with 6 National Board Certified Physical Education Teachers (NBCPETs) and individual phone interviews with 20 NBCPETs using an interview guide (Patton, 2007Patton, M. Q.2007. Qualitative research & evaluation methods.Thousand Oaks, CA: Sage Publishers.. [Google Scholar]). Data were analyzed inductively using the Miles and Huberman (1984)Miles, M. B. and Huberman, A. M.1984. Qualitative data analysis: A source book of new methods.Beverly Hills, CA: Sage Publishers.. [Google Scholar] four-stage process. Findings indicated that teachers and administrators considered National Board Certification a symbol of highly skilled teaching. Possessing this symbol changed the way the NBCPETs approached their work and how others acted toward them. NBCPETs felt more confident, more vocal, and more active in leadership positions. 相似文献
Over the past 20 years, many theories on achievement motivation have been established to understand the complex interaction of motivational variables and identify the conditions that can enhance individuals' motivation. This review explores the role of conceptions of ability, its relations to other major motivational frameworks and factors affecting individuals' conceptions of ability, with the goal of identifying the major contributions to the research knowledge base. Research findings show that beliefs about the nature of ability are critical elements to all other major theories. Conceptions of ability and all other major theories directly affect motivational patterns and outcomes. Finally, based on the literature reviewed, a conceptual theoretical model is proposed. 相似文献
