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This work is devoted to the study of symmetric control systems. It establishes a relation between internal symmetry and external one for a linear invariant control system having n real simple poles. The symmetric stabilization problem is studied using a symmetric feedback gain such that the output control stabilizes the closed-loop system. A necessary and sufficient condition is given to solve this stabilization problem for a symmetric control system (A,B,C) and a generalized symmetric control system (E,A,B,C). 相似文献
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AbstractThis study focuses on the uses that two groups of higher education students make of technological resources offered by an institution to build their own personal learning environments. The main thesis is that these uses depend on the techno-pedagogical design of the teaching and learning process in which the technological resources are framed. In order to explore and illustrate this thesis two instructional sequences have been analysed. Both use the same technological design, the Elgg platform, which allows users to select and organize a set of resources or widgets according to their interests and needs. The results show that in both cases the uses that students make of technology are related to the characteristics and requirements of the particular techno-pedagogical designs. We conclude that the key is not to offer technological resources to the students so they can build their own personal learning environments, but to design activities that attract and induce them to build these personal environments and to guide and support the process of construction. 相似文献
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This study assessed the progress of students involved in a collaborative early warning intervention conducted by counseling services and a teacher preparation program. Results indicated that counseling services increased both students' academic and social integration and their confidence in their ability to teach and perform the duties of a teacher. Findings and implications are discussed. 相似文献
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Claire Robson Dennis Sumara Rebecca Luce‐Kapler Bridget Coll Pat Hogan Greta Hurst 《Changing English: An International Journal of English Teaching》2010,17(4):385-398
For a number of years, Rebecca Luce‐Kapler and Dennis Sumara have been investigating the ways in which literary practices of close reading can help change how we think and how we remember. They have also considered how such practices might help make us more critical of normative representations of remembered experience. More recently, they have been joined by Claire Robson, who works with and investigates memoir writing. In 2009, Robson and Sumara were joined by their six older lesbian research participants at a conference held at the University of British Columbia entitled ‘Queerly Canadian: Changing Narratives’. The six women performed extracts from memoirs they had written as part of the research data and joined the researchers in offering theories and insights about the writing processes in which the group had engaged. That presentation and this paper represent the evolution of a two‐year collaboration between these researchers and the six women, who are listed as co‐authors on both the presentation and this paper. 相似文献
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THE DEAL OF THE CENTURY: THE BREAKUP OF AT&T by Steve Coll (New York: Atheneum, 1986—$18.95) ENTERTAINMENT INDUSTRY ECONOMICS: A GUIDE FOR FINANCIAL ANALYSIS by Harold L. Vogel (New York: Cambridge University Press, 1986—$24.95) THE CONTROL REVOLUTION: TECHNOLOGICAL AND ECONOMIC ORIGINS OF THE INFORMATION SOCIETY by James R. Beniger (Cambridge, MA: Harvard University Press, 1986—$25.00) 相似文献
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Regina Coll 《Religious education (Chicago, Ill.)》2013,108(3):373-382
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César Coll 《Infancia y Aprendizaje》2013,36(7):60-73
RESUMENEl autor parte de una revisión de las distintas concepciones sobre el concepto de psicología evolutiva, pasando por el concepto de desarrollo, edad y psicología infantil, para acabar recabando la atención sobre la importancia que ha tenido la psicología genética en la metodología de estudio del desarrollo. 相似文献