排序方式： 共有11条查询结果，搜索用时 15 毫秒
1.
Mathematical models are an approximate of physical systems and design procedures are only complete when modeling errors have been quantified. Uncertainties are incorporated in design procedure to compensate such discrepancies and to add robustness. This paper investigates the design problem of parameter-dependent switched observers for polytopic uncertain switched systems. State-space model is considered subject to time-varying uncertainties, and designated observer gains ensuring stability of overall system are also parameter-dependent. Synthesis procedure is demonstrated by employing ?∞ performance criteria which has become a standard for robust system design against external disturbances. This investigation is carried out in the framework of finite-time stability (FTS) and finite-time boundedness (FTB) which is the focus of researchers recently because of its apparent practical significance, especially after the emergent utilization of linear matrix inequalities. 相似文献
2.
This Forum issue discusses the centrality of the fieldwork in doctoral research. The inevitability of researchers’ influence and of their values apparent during and after their fieldwork calls for a high degree of reflexivity. Since the standard methodology textbooks do not sufficiently guide on addressing such challenges, doctoral researchers go through stressful phases, at times revising various decisions they made before starting fieldwork. By drawing upon four case studies from varied contexts, this forum highlights some of these challenges including: going beyond signing the consent form and building rapport to elicit student voices; the ethical implications of White privilege of researchers turning consent into an obligatory contract with participants; unanticipated delays in the fieldwork opening up new possibilities; and tensions resulting from negotiating between insider and outsider identities while researching in two hostile contexts. 相似文献
3.
Muhammad Abid Saleem Lynne Eagle Naveed Akhtar Allah Wasaya 《Journal of Marketing for HIGHER EDUCATION》2020,30(1):45-65
ABSTRACT This empirical investigation was aimed at conceptualizing, developing and validating a scale for the measurement of the quality of higher degrees by research (HDR-QUAL). For that purpose, this study specifically measured perceptions of higher degrees by research (HDR) students about the constituents of HDR quality in Pakistani tertiary education institutions. Following the 7-step process of scale development, three studies were conducted in order to develop an initial pool of scale items, establishing proposed scale validity and reliability, and assessing nomological behavior of the proposed scale. The principal component analysis with Varimax rotation method resulted in a 3-factor solution, subsequently proposing a 15-item scale. The model fit indices of measurement and the higher-order model indicated a satisfactory fit to data. Finally, the resultant three factors, i.e. financial assistance, supervisory expertise, and infrastructural support, converged into a unidimensional HDR-QUAL scale that was found positively associated with student satisfaction, thus, confirming nomological validity as well. Important policy measures and directions for future research are proposed at the end. 相似文献
4.
Veerle De Bosscher Paul De Knop Maarten van Bottenburg Simon Shibli Jerry Bingham 《Sport Management Review》2009,12(3):113-136
The aim of this article is to explore the relationship between elite sport policy systems (inputs and throughputs) and success in international competitions (outputs). A conceptual model of the sports policy factors, which lead to international sporting success, was implemented in an empirical environment in a pilot study with six nations. The study has sought to operationalise nine pillars, or key drivers in elite sport systems, into measurable concepts, which can be aggregated into an overall score for each pillar. In addition to a national sport policy questionnaire, athletes, coaches and performance directors were also involved in the collection of qualitative and quantitative data. Although the results are inconclusive, the findings suggest that some pillars could be regarded as possible drivers of an effective system because they were prioritised in the most successful sample nations: financial resources (pillar 1), athletic and post-career support (pillar 5), training facilities (pillar 6) and coach development (partly pillar 7). 相似文献
5.
Education for all as a global agenda has particular repercussions for those living in rural poverty. By adopting a Bourdieusian framework to analyse interview data collected from fathers, mothers, sons and daughters in 10 rural Punjabi households, we expose the intersections of education, gender, poverty and rurality. The concept of a rural family habitus focuses attention on the collective, relational and dispositional worlds of such families. Three dimensions are used to analyse reproduction and transformation in each narrative set: intergenerational educational dynamics; on-going gender dynamics; and, social dynamics within the rural field. The findings challenge the stereotyping and assumed homogeneity of rural families whose gender cultures and positive educational dispositions are diverse and complex. The gendered histories of parental education, their aspirations, and their social status in the rural field intersect with the changing gender relations which result from schooling, and the increasing differentiation between educated and uneducated rural families. 相似文献
6.
Effect of seedling age and water depth on morphological and physiological aspects of transplanted rice under high temperature 总被引：2，自引：0，他引：2
Khakwani AA Shiraishi M Zubair M Baloch MS Naveed K Awan I 《Journal of Zhejiang University. Science. B》2005,6(5):389-395
INTRODUCTION Rice (Oryza sativa L.) is one of the most im-portant crops in Pakistan. It is the third largest crop interms of area and production after wheat and cotton.Although rice in Pakistan is consuming large acreage,Pakistan is still far behind other rice producingcountries. The average yield is very low (2 t/ha) ascompared to Egypt (8.4 t/ha) and USA (6.6 t/ha).There are many reasons for this low yield. The mostimportant are high temperature (40?50 °C), low hu-midity at … 相似文献
7.
8.
Naveed A. Shaikh 《Peabody Journal of Education》2013,88(1):74-76
Since the separate-but-equal era, students attending schools with high concentrations of Black students have attempted to improve the quality of their educations through school finance litigation. Because of the negative effects of racial isolation, Black students might consider mounting school finance litigation to force states to explicitly address the problems experienced by school districts with high concentrations of Black students (Green, Baker, &; Oluwole, 2008). This article assesses the role of the courts in remedying the disparities experienced by high-concentration Black school districts through school finance litigation. The first section provides a brief overview of prior attempts to challenge racial funding disparities in the federal courts. The second section discusses the importance of considering race in future school finance litigation. The third section assesses whether plaintiffs from high-concentration Black school districts can obtain equal educational opportunity through state courts. 相似文献
9.
Muhammad Asif Naveed 《International Information and Library Review》2017,49(4):266-273
This research aims to provide an analytic and critical review of research on information seeking anxiety (ISA) with a view to inform the information professionals, especially those engaged in information literacy instructions about the existing situation. This study established the background of the proposed phenomenon, provided integrated analysis of the available research, and discussed the theoretical and practical implications of ISA on information services, especially information literacy instruction. Although the results from previous studies were not comparable, directly due to varied geographical contexts and research methods, it was nevertheless possible to draw some common conclusions regarding the users’ anxiety related to information seeking tasks. This review overwhelmingly indicated the manifestation and prevalence of ISA among students in the digital environment. Some personal and academics variables of students appear to be correlated with ISA. The results of reviewed studies indicated the necessity for a need-based information literacy curriculum for alleviation of anxiety related to students’ information-seeking tasks. 相似文献
10.
ABSTRACTThe aim of this methodological article is to contribute a new form of qualitative data analysis that is relevant for the comparative study of family cultures and schooling. We describe the development of our Habitus Listening Guide linking Bourdieu’s theory of social reproduction to critical narrative theory. The interpretative tool outlines (a) social-structural (b) horizontal intergenerational (c) vertical gender and (d) mythic-ritual listenings which can be used to explore the engagement of youth and their families with schooling. Such listenings reveal the dispositional positioning of schooling in family values and the complex structural and human relational effects of schooling on family members’ livelihood and wellbeing. It offers the possibility of comparing families in terms of their gendered and generational relations and the ways in which religious and mythic-ritual discourses legitimate their aspirations in the context of changing communities. The Guide offers a way of accessing and comparing subjective micro level experiences of social inequality and the contribution that schooling plays, or is expected to play, in relation to individual and/or family social mobility. 相似文献