A Phenomenological Investigation of African American Counselor Education Students' Challenging Experiences     

Malik S. Henfield  Hongryun Woo  Ahmad Washington 《Counselor Education & Supervision》2013,52(2):122-136

This study explored 11 African American doctoral students’ perceptions of challenging experiences in counselor education programs. The authors identified the following themes using critical race theory: feelings of isolation, peer disconnection, and faculty misunderstandings and disrespect. Implications for counselor education programs and policies are discussed.  相似文献   

TEAMWORK IN ISRAELI ARAB-BEDOUIN SCHOOL-BASED MANAGEMENT     

by Omar  Mizel 《British Journal of Educational Studies》2009,57(3):305-327

ABSTRACT:  Throughout the western world a leading example of the educational reforms that have been implemented in the late twentieth and twenty-first century is School-Based Management (SBM), a system designed to improve educational outcome through staff teamwork and self-governance. This research set out to examine the efficacy of teamwork in ten SBM-designated Arab-Bedouin elementary schools in Israel. Two explicit issues were examined: (1) What impact did SBM have on the development of teamwork among the schools' staff? (2) Does the Arab-Bedouin social-cultural context influence implementation of teamwork in SBM schools? The research method consisted of a questionnaire to which 361 teachers/school principals replied, and a semi-structured interview with 30 of the respondents. Results of this study demonstrate that true teamwork does not exist in the schools studied, despite their SBM official status, primarily because the concept of teamwork clashes with the social/cultural norms of traditional Arab-Bedouin society and thus exacerbates conflicts among staff, which then impedes implementation of SBM. In conclusion, this research recommends that for SBM to enable traditional Arab-Bedouin society to benefit from managing its own schools, broad educational changes such as this must be introduced gradually, in a customised, culturally sensitive manner.  相似文献   

Adaptive T–S fuzzy controller using reinforcement learning based on Lyapunov stability     

A. Aziz Khater  Ahmad M. El-Nagar  Mohammad El-Bardini  Nabila M. El-Rabaie 《Journal of The Franklin Institute》2018,355(14):6390-6415

In this paper, an adaptive Takagi–Sugeno (T–S) fuzzy controller based on reinforcement learning for controlling the nonlinear dynamical systems is proposed. The parameters of the T–S fuzzy system are learned using the reinforcement learning based on the actor-critic method. This on-line learning algorithm improves the controller performance over the time, which it learns from its own faults through the reinforcement signal from the external environment and tries to reinforce the T–S fuzzy system parameters to converge. The updating parameters are developed using the Lyapunov stability criterion. The proposed controller is faster in learning than the T–S fuzzy that parameters learned using the gradient descent method under the same conditions. Moreover, it is able to handle the load changes and the system uncertainties. The test is carried out based on two mathematical models. In addition, the proposed controller is applied practically for controlling a direct current (DC) shunt machine. The results indicate that the response of the proposed controller has a good performance compared with other controllers.  相似文献   

Probabilistic fuzzy logic controller for uncertain nonlinear systems     

Omar Shaheen  Ahmad M. El-Nagar  Mohammad El-Bardini  Nabila M. El-Rabaie 《Journal of The Franklin Institute》2018,355(3):1088-1106

This paper proposes a probabilistic fuzzy proportional - integral (PFPI) controller for controlling uncertain nonlinear systems. Firstly, the probabilistic fuzzy logic system (PFLS) improves the capability of the ordinary fuzzy logic system (FLS) to overcome various uncertainties in the controlled dynamical systems by integrating the probability method into the fuzzy logic system. Moreover, the input/output relationship for the proposed PFPI controller is derived. The resulting structure is equivalent to nonlinear PI controller and the equivalent gains for the proposed PFPI controller are a nonlinear function of input variables. These gains are changed as the input variables changed. The sufficient conditions for the proposed PFPI controller, which achieve the bounded-input bounded-output (BIBO) stability are obtained based on the small gain theorem. Finally, the obtained results indicate that the PFPI controller is able to reduce the effect of the system uncertainties compared with the fuzzy PI (FPI) controller.  相似文献   

Foucault’s History of the Present: The Birth of the Games Concept Approach in Singapore’s Physical Education Curriculum     

Sheikh Omar Mohamad 《国际体育史杂志》2018,35(12-13):1325-1334

Abstract

The year 1999 saw a major shift in Singapore’s Physical Education curriculum when the traditional teaching approach in primary schools was replaced by a more game-like one, aptly known as the Games Concept Approach (GCA). Based on Foucault’s ‘History of the Present’ which intended to distinguish the kind of historical projects that brought this change, the focus is on tracing the forces that gave birth to the present-day practices and identifying the historical conditions which caused this shift towards GCA. Inspired by Foucault’s distinct elements of status, institutional sites and situation, the perspective of revealing a ‘history of the present’ on the birth of GCA in Singapore creates a better understanding of why it is still being taught in the PE curriculum.  相似文献   

The impact of organizational factors on management information system success: An investigation in the Iran's agricultural extension providers     

Abdolmotalleb Rezaei  Ali Asadi  Ahmad Rezvanfar  Hajar Hassanshahi 《International Information and Library Review》2009,41(3):163-172

Information system success has been widely discussed in the past two decades. As systems and technologies are being improved and developed, discussions on their effectiveness and evaluation on their success have been continuously debated by researchers, scholars and practitioners throughout the years. Besides the major concern of IS effectiveness, factors influencing IS effectiveness are also important. One of these factors is the organizational factor. Using perceptual measures, this study aims to investigate the influence of organizational factors on MIS success. Survey questionnaires were gathered from 132 Extension Managers from Iran's Agricultural Extension Providers. Seven items were identified to influence MIS success. They are IS department structure, top management support, management style, managerial IT knowledge, goal alignment, resources allocation and IS infrastructure. The study also identified five MIS success dimensions; systems quality, information quality, perceived Ease of use, organizational impact and individual impact. The study found that the MIS success variables are significantly and highly correlated. The study also found all the organizational factors are significantly correlated to the five IS success factors investigated; the system quality, information quality, perceived ease of use, organizational impact and individual impact. Multiple regression analyses also found goal alignment as the highest predictor of IS success, followed by IS department structure, IS infrastructure and management style.  相似文献   

Enhancing automatic control learning through Arduino-based projects     

Hanafy M. Omar 《European Journal of Engineering Education》2018,43(5):652-663

Systems dynamics and automatic control is classified as one of the toughest courses in the college of engineering at Qassim University according to the statistical analysis of the final grades. This motivated us to think about a new approach to teach this course by extending the design term project to include experimental part beside the theoretical analysis. This approach has become feasible due to the publicity of the low-cost microcontrollers such as the Arduino in the recent years. In this paper, we present our experience in conducting Arduino-based projects and how we used them to support the teaching of all the automatic control subjects in the course such as the mathematical modelling, the stability analysis, the controller design and the implementation of the PID controller. It was found that the new approach improves the attention and the overall performance of the students in the course which was reflected in the students’ marks in the quizzes and exams. Moreover, it motivated the students to be creative by utilising the control theory to design new systems that can be useful for their local community.  相似文献   

试析维吾尔族人生礼仪的文化内涵   总被引：1，自引：0，他引：1  

卡沙依丁·艾合买提 《喀什师范学院学报》2009,30(4):36-39

对维吾尔族人生礼仪作简要的介绍,进而分析其中所体现出的维吾尔人的社会伦理观、吉祥数崇拜观、生死观念,以及贯穿于各人生礼仪之中的人际馈赠关系。  相似文献   

喀什地区基础教育新课改现状及其对我院的启示     

艾尔肯·吾买尔  刘健  刘玉杰 《喀什师范学院学报》2009,30(4):6-9

探讨南疆基础教育教师对新课程改革方案的适应性问题,对于新课程改革的顺利实施有着重要意义。调查研究表明,喀什地区敦师对新课程改革的理念持认同态度并表现出一定的适应性;但也存在一些问题,如教师的观念与现实脱节、教师的心理不适应新课改等。为此我们依照喀什师范学院学习实践科学发展观活动预先设计好的思路进行了较为深入、全面的调查,并获得了对于我院人才培养质量提高和人才培养模式改进的有益启示和建设性意见。  相似文献   

Characterization of wall dispersive and attenuative effects on UWB radar signals     

Ali Muqaibel  Ahmad Safaai-Jazi 《Journal of The Franklin Institute》2008,345(6):640-658

This paper addresses the potentials of ultra-wideband (UWB) through-wall imaging radars compared with conventional narrowband systems. The challenges that limit the utilization of high precision UWB systems are examined with the aim of mitigating them. These challenges include multi-path, pulse dispersion, and antenna effects on the pulse shape due to angles of transmission and arrival. The propagation of UWB signals through walls is a crucial factor in determining the success of UWB radar technology. UWB signals, when propagating through walls, not only suffer attenuation but also distortion due to dispersive properties of the walls. This paper examines time- and frequency-domain techniques for measuring the electromagnetic properties of construction materials in the UWB frequency range. The measured parameters provide valuable insights in appreciating the capabilities and limitations of the UWB technology. Special attention is paid to time gating as a mean to extract the direct-path signal from the multi-path components. Both single-pass and multi-pass models are discussed. Multi-pass models account for the multiple reflections within the wall while the single-pass model assumes the possibility of gating out a single transmission. The partition-dependent narrowband propagation model is modified to account for the ultra-wide bandwidth of the signal. The paper illustrates the application of the modified model in indoor environments. The modified model is helpful in estimating the link power budget. It is also useful in studying the performance of UWB systems for indoor communication and positioning applications.  相似文献