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21.
The classical criteria for controllability and observability are given a tensorial formulation which is then extended into Boolean form directly related to a digraph interpretation of system structure. This is examined in detail with particular reference to group theoretic aspects, invariant properties under transformation, the term rank test and the existence of zero eigenvalues.Within this framework the structural design concepts of potential controllability and observability are presented in generalised terms.  相似文献   
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The graph theoretic aspects of controllability and observability are examined and related to the tensorial formulation of Part I of the paper. Particular emphasis is given to the significance of the system digraph decomposition and the relevance of this to certain system algebraic properties of interest in control theory.  相似文献   
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Students with intellectual disabilities aged 18–21 are increasingly receiving transition services on college campuses during the last years of public schooling. These students may attend college courses, work in the community, access community recreational activities, and engage in age-appropriate experiences with peers without disabilities. However, there is little research that documents the types of practices included, the perspectives of consumers, or the outcomes of these transition services. Results from this case study depict how one public school program on a community college campus incorporated recommended transition practices and how students with intellectual disabilities and their families perceived these practices.  相似文献   
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This paper explores the connections between Physical Education, nationalism and citizenship in England and Wales focusing upon how education legislation, in particular the National Curriculum (NC) and Local Management of Schools (LMS), are implicated in the cultural production of ideational differences between and amongst the peoples of England and Wales. As our previous research has centred heavily on the making and implementation of education policy and PE in England, we take this opportunity to adjust our gaze and focus squarely on issues of cultural production in Wales, particularly relationships between the construction of images of Welsh identity and education policy and practice relating to PE and sport in schools. The analysis highlights that tendencies towards a narrow, conservative, cultural restoration are as evident in Wales as they are in England and obstruct progression towards more innovative and progressive ideals.  相似文献   
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The researchers performed a survey study to determine the effectiveness of collegiate programmes in dispelling common misconceptions about traumatic brain injury (TBI) while preparing undergraduate and graduate students for special education (SpEd) careers. Respondents included 136 undergraduate and 147 graduate SpEd students in their final semesters before obtaining degrees. Each completed an 18‐item true/false survey about TBI and the associated recovery process. Results were compared with survey responses from 318 lay public respondents who participated in a previous study. Two major findings emerged: (a) no significant differences existed in misconception endorsement between SpEd students completing Bachelor's versus Master's degrees; and (b) graduating students in SpEd teacher preparation programmes endorsed similar misconceptions as lay public respondents; hence, these programmes do not appear effective in dispelling common TBI misconceptions. Improving academic preparation for special educators regarding TBI is imperative for effectively identifying, assessing and serving student survivors.  相似文献   
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Massive open online courses (MOOCs) have proliferated in recent years despite disagreement about the role of MOOCs in higher education and whether student outcomes are satisfactory. Taking a mixed-methods approach, the current study surveys professors who have taught MOOCs (n = 162) in order to better understand how MOOCs are perceived by instructors. Professors’ backgrounds and beliefs about the role of MOOCs in higher education and their perceptions of the experiences of students are discussed. In addition, professors’ satisfaction in teaching MOOCs is reported. The study finds that most MOOC professors are experienced faculty members with relatively little prior experience teaching online, and that they are divided about the purpose of MOOCs in the institutional landscape of higher education.  相似文献   
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