Advanced stability criteria for linear systems with time-varying delays     

M.J. Park  O.M. Kwon  J.H. Ryu 《Journal of The Franklin Institute》2018,355(1):520-543

This paper investigates a stability problem for linear systems with time-varying delays. By constructing suitable augmented Lyapunov–Krasovskii functionals, improved stability criteria under various conditions of time-varying delays are derived within the framework of linear matrix inequalities (LMIs). Moreover, to reduce the computational burden caused by the non-convex term including h²(t), how to deal with it is applied by estimating it to the convex term including h(t). Finally, three illustrative examples are given to show the effectiveness of the proposed criteria.  相似文献   

Physical Education Preservice Teachers’ Perceptions About Preparation for Comprehensive School Physical Activity Programs     

Ja Youn Kwon  Pamela Hodges Kulinna  Hans van der Mars  Mirka Koro-Ljungberg  Audrey Amrein-Beardsley  Jason Norris 《Research quarterly for exercise and sport》2018,89(2):221-234

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Improved approaches to stability criteria for neural networks with time-varying delays     

O.M. Kwon  M.J. Park  Ju H. Park  S.M. Lee  E.J. Cha 《Journal of The Franklin Institute》2013

In this paper, the problem of stability analysis for neural networks with time-varying delays is considered. By the use of a newly augmented Lyapunov functional and some novel techniques, sufficient conditions to guarantee the asymptotic stability of the concerned networks are established in terms of linear matrix inequalities (LMIs). Three numerical examples are given to show the improved stability region of the proposed works.  相似文献   

Conducting Rigorous Survey Research in the Study of School-Based Consultation     

Cynthia E. Hazel  Daniel S. Newman  Courtenay A. Barrett 《Journal of educational and psychological consultation》2016,26(2):111-138

The evidence base for school-based consultation practice and training is limited by a small number of studies, possibly due to unique challenges in researching consultation. For example, there are myriad variables to measure and idiosyncratic cultural and contextual factors to account for when investigating what works, for whom, and in what circumstances. Survey methodology offers one means for conducting consultation research. This article proposes a process for rigorous survey research in school-based consultation training and practice, which addresses some potential concerns regarding survey research. Specifically, issues of survey development, survey validation, sampling, and data collection are addressed. These processes are illustrated through the design and administration of an online survey of 262 early career school psychologists; preliminary data analyses suggested strong scale reliability, minimal item response bias, and population representativeness. Recommendations for future consultation survey research are provided.  相似文献   

Wider access and progression among full-time students     

Muir Houston  Hazel Knox  Russell Rimmer 《Higher Education》2007,53(1):107-146

By 2010 the UK government intends to widen access and provide experience of higher education to half of those aged up to 30. Unlike many institutions, University of Paisley (UP) has exceeded its individual target on access. It has done this by providing entry routes for students with ‘non-traditional’ qualifications. It is feared that low entry qualifications will adversely influence performance and progression statistics as wider access is pursued. Drawing on a student-attrition theory, performance and progression are investigated using data for students enrolling at UP for the first time in 2000. At UP non-traditional entry coincided with the enrolment of many students over 21. The relationships between age and performance and between age and progression are nonlinear and involve interactions with gender. Also, there are interactions between entry qualification and field of study. These relationships and interactions could complicate the important task of translating wider access into academic success.  相似文献   

Exploring Gender and Phenomenography     

Elizabeth Hazel  Linda Conrad  Elaine Martin 《高等教育研究与发展》1997,16(2):213-226

A critical feature of phenomenographic study is its generation of the “outcome space” which constitutes the results of the study. The central idea underlying this article is that women may be “lost in space" — the phenomenographic outcome space. First, women seem to be literally missing in the majority of phenomenographic studies. These studies have usually been in fields in which women are poorly represented and in research samples in which women have not been present. Second, the traditional disciplines of study, the values of which largely determine the structure of the typically hierarchical outcome space, are patriarchal. Without attention to the hidden as well as the explicit aspects of what learners are coming to know, the understanding that we gain from the outcome space may be distorted. Third, the outcome space tends to be defined in many studies in cognitive terms, excluding or neglecting the affective dimension often associated with women's ways of knowing. This article explores the implications of looking for and elaborating on women's experience in phenomenographic research and suggests several ways in which women's experience might be recognised: by ensuring that women are included in research; by questioning in gender‐sensitive ways; by collecting and analysing the data with attention to the gendered construction of disciplinary knowledge and gendered ways of knowing.  相似文献   

Cultivating divergent thinking in mathematics through an open-ended approach     

Oh Nam Kwon  Jee Hyun Park  Jung Sook Park 《Asia Pacific Education Review》2006,7(1):51-61

The purpose of this study was to develop a program to help cultivate divergent thinking in mathematics based on open-ended problems and to investigate its effect. The participants were 398 seventh grade students attending middle schools in Seoul. A method of pre- and post-testing was used to measure mainly divergent thinking skills through open-ended problems. The results indicated that the treatment group students performed better than the comparison students overall on each component of divergent thinking skills, which includes fluency, flexibility, and originality. The developed program can be a useful resource for teachers to use in enhancing their students’ creative thinking skills. An open-ended approach in teaching mathematics suggested in this paper may provide a possible arena for exploring the prospects and possibilities of improving mathematical creativity.  相似文献   

Social Influences on Terrestrial and Satellite Mobile-TV Adoption in Korea: Affiliation,Positive Self-Image,and Perceived Popularity     

Kyounghee Hazel Kwon  Bum Soo Chon 《媒体管理杂志》2013,15(2):49-60

Mobile TV is a representative product of media convergence. In South Korea, the diffusion of mobile TV has been in high gear, which provides an exemplary case study of mobile-TV adoption. The study examines the relation between the social influence, adopters' individual factors, and the adoption of the 2 different forms of mobile TV: terrestrial and satellite. Factor analysis identified 3 dimensions of social influences, defined respectively as “affiliation,” “positive self-display,” and “perceived popularity.” Results suggest that these 3 social influences differ in degree in relation to the adopters' demographic characteristics and innovativeness. Adoption of terrestrial or satellite mobile TV was predicted by social influence and, in particular, driven by the motivation to maintain a positive self-image. Because of the implications this may have on media management, the article calls for future research on the social construction of new media technology use to assess how individuals become susceptible to social influences and how social influences affect the diffusion of the technology.  相似文献   

REVIEW ARTICLE: NEW INTERNATIONAL PERSPECTIVES ON RELIGIOUS EDUCATION THEORY     

Bert Roebben  Carla Gober  Heejung Kwon  Stefan Heil 《Religious education (Chicago, Ill.)》2013,108(4)

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Construction of difference and diversity within policy and practice in England     

Hazel Lawson  Ruth Boyask  Sue Waite 《Cambridge Journal of Education》2013,43(1):107-122

Policy and practice responses to diversity and difference in pupil populations continue to challenge education systems around the world. This paper considers how teachers’ understandings of diversity and difference and their pedagogical responses at the local level are influenced by, and can be reconciled with, policy at the general level with its impulse for categorisation, normalcy and ‘ableness’. Two frameworks around orientations to diversity and types of pedagogic need are combined in order to examine this tension and develop possible responses. This is illustrated through the example of special educational needs as a type of difference. The paper argues that for critical, ethical and socially just pedagogies, policy needs to support teachers in acknowledging and troubling difference at the classroom level.  相似文献