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1.
Modeling of D-STATCOM in distribution systems load flow 总被引：1，自引：0，他引：1
HOSSEINI Mehdi SHAYANFAR Heidar Ali FOTUHI-FIRUZABAD Mahmud 《浙江大学学报(A卷英文版)》2007,8(10):1532-1542
This paper presents modeling of Distribution STATCOM (D-STATCOM) in load flow calculations for the steady- state voltage compensation. An accurate model for D-STATCOM is derived to use in load flow calculations. The rating of this device as well as the direction of required reactive power injection for voltage compensation in the desired value (1 p.u.) is de- rived and discussed analytically and mathematically by the phasor diagram method. Furthermore, an efficient method for node and line identification used in load flow calculations is presented. The validity of the proposed model is examined by using two standard distribution systems consisting of 33 and 69 nodes, respectively. The best location of D-STATCOM for under voltage problem mitigation approach in the distribution networks is determined. The results validate the proposed model for D- STATCOM in large distribution systems. 相似文献
2.
Mahmud Akhter ShareefAuthor VitaeUma KumarAuthor Vitae Yogesh K. DwivediAuthor Vitae 《Government Information Quarterly》2011,28(1):17-35
This research has as its objective the discovery of the critical factors that enable citizens to adopt e-Government (e-Gov) at different stages of service maturity. To accomplish the objective, this research has explained the related concepts and theories and developed a research framework grounded on a strong theoretical and literature review background. The empirical study was conducted in Canada, which is a leader in providing mature e-Gov services. From our results, we have observed two ontological differences from the present literature in the adoption behavior of e-Gov where organizational and financial perspectives have distinct implications over parsimonious technology adoption behavior. First, technology adoption model (TAM), diffusion of innovation theory (DOI), and theory of planned behavior (TPB) cannot capture and specify the complete essence of e-Gov adoption behavior of citizens. Second, e-Gov adoption behavior also differs based on service maturity levels, i.e., when functional characteristics of organizational, technological, economical, and social perspectives of e-Gov differ. Our findings indicate the critical factors that enable citizens to adopt e-Gov at different stages of service maturity. Public administrators and policy-makers have potential implications from the findings of the adoption behavior of e-Gov at different maturity levels. 相似文献
3.
The perspective of six Malaysian students on playing video games： Beneficial or detrimental？ 总被引：1，自引：0，他引：1
Roselan Baki Eow Yee Leng Wan Zah Wan Ali Rosnaini Mahmud Mohd. Sahandri Gani Hamzah 《美中教育评论》2008,5(11):11-21
This study provides a glimpse into understanding the potential benefits as well as harm of playing video games from the perspective of six Malaysian secondary school students, aged 16-17 years old. The rationale of the study is to enable parents, educators, administrators and policy makers to develop a sound understanding on the impact of playing video games before making any judgment on the contemporary youth culture. Thus, further decision on the acceptance of video games as a new innovation in school or at home could be considered. Although this study is not very extensive, the findings suggest that playing video games contributes to cognitive, social, motivational and emotional development. However, potential harms do exist. Parents play an important role in guiding their children either directly or indirectly, as indicated by the respective students. Caution is advised in the interpretation of the study＇s findings as it is solely based on the perspectives of the students, as the first person＇s views. Nevertheless, each student has their very own perspective on the impact of video games on them. 相似文献
4.
Ali Shoukot Sarker Md Fouad Hossain Islam M. Saiful Islam Md Kabirul Al Mahmud Rafi 《Tertiary Education and Management》2021,27(2):91-106
Tertiary Education and Management - This study examines how students from rural areas in Bangladesh face particular challenges in adapting to university dormitories in urban areas. There has been... 相似文献
5.
Vishanth Weerakkody Ramzi El-Haddadeh Faris Al-Sobhi Mahmud Akhter Shareef Yogesh K. Dwivedi 《International Journal of Information Management》2013
The adoption and diffusion of electronic government is often impeded by many social and individual factors relating to citizens. In this respect, intermediaries have emerged as a new model for delivering e-government services to overcome such obstacles. This study aims to examine the role of intermediaries in facilitating e-government adoption and diffusion using a survey based empirical study of 502 participants in Madinah City in Saudi Arabia. An extended UTAUT model is used as the theoretical basis utilizing trust in the Internet and Intermediaries. The results of this study show that there are significant relationships among the factors that influence intention to use e-government, namely, performance expectancy, effort expectancy, and trust of intermediary. In addition, the findings show that there is a significant relationship between facilitating conditions and usage behavior proving that intermediaries can influence adoption of e-government services. 相似文献
6.
Research in natural language processing has increasingly focused on normalizing Twitter messages. Currently, while different well-defined approaches have been proposed for the English language, the problem remains far from being solved for other languages, such as Malay. Thus, in this paper, we propose an approach to normalize the Malay Twitter messages based on corpus-driven analysis. An architecture for Malay Tweet normalization is presented, which comprises seven main modules: (1) enhanced tokenization, (2) In-Vocabulary (IV) detection, (3) specialized dictionary query, (4) repeated letter elimination, (5) abbreviation adjusting, (6) English word translation, and (7) de-tokenization. A parallel Tweet dataset, consisting of 9000 Malay Tweets, is used in the development and testing stages. To measure the performance of the system, an evaluation is carried out. The result is promising whereby we score 0.83 in BLEU against the baseline BLEU, which scores 0.46. To compare the accuracy of the architecture with other statistical approaches, an SMT-like normalization system is implemented, trained, and evaluated with an identical parallel dataset. The experimental results demonstrate that we achieve higher accuracy by the normalization system, which is designed based on the features of Malay Tweets, compared to the SMT-like system. 相似文献
7.
Private supplementary tutoring with an additional fee is generally called shadow education, and this has become a common phenomenon in urban Dhaka, where patterns and scale of tutoring in English have been remarkable in recent years. This study used a mixed-methods approach that included quantitative and qualitative data collected from a survey and individual interview. Tutoring in English has been a regular feature of the teaching profession in this urban area. The paper examines various patterns of private tutoring in English and focuses on the amount of tutoring, including the tutoring received and not received by students in urban Dhaka. It shows the variations of scale regarding tutoring in English between male and female students. The study also identifies different types of private tutors who deliver supplementary tutoring. Finally, the choices pupils make regarding their evaluation on the effectiveness of shapes of tutoring in English are discussed. 相似文献
8.
In this quasi-experimental study, we describe the effect of showing dissection videos on first-year medical students' performance in terms of test scores during a gross anatomy course. We also surveyed students' perception regarding the showing of dissection videos. Two hundred eighty-seven first-year medical students at Rawalpindi Medical College in Pakistan, divided into two groups, dissected one limb in first term and switched over to the other limb in the second term. During the second term, instruction was supplemented by dissection videos. Second-term anatomy examination marks were compared with first-term scores and with results from first-year medical students in previous years. Multiple linear regression analysis was performed, with term scores (continuous, 0-200) as the dependent variable. Students shown dissection videos scored 1.26 marks higher than those not shown. The relationship was not statistically significant (95% CI: -1.11, 3.70; P = 0.314). Ninety-three percent of students favored regular inclusion of dissection videos in curriculum, and 50% termed it the best source for learning gross anatomy. Seventy-six percent of students did not perform regular cadaver dissection. The most frequent reason cited for not performing regular dissection was high student-cadaver ratio. Dissection videos did not improve performance on final examination scores; however, students favored their use. 相似文献
9.
This article examines the complexity and multiplicity of perspectives in studying organisational culture in higher education settings. This multiplicity of conceptualisations of cultures has purportedly been derived from the different points of view of many disciplines, which have made the study of culture and cultural research enigmatic for neophyte researchers in particular. In view of this, this article aims to put those varied points of view together to build a hybrid composed of cultural definitions, manifestations and university culture, using semiotics and functionalist perspectives, and elements of various methodologies used in conducting cultural research. The latter is grounded on the premise that the epistemology, theoretical perspectives and methodology used influence the strength of research designs that ultimately contribute to the production of legitimate knowledge. It is expected that this proposed hybrid mode of understanding and researching culture can become a model for studying culture and organisational culture in higher education sectors for professionals in general and for those undertaking PhD studies (neophyte researchers) in particular. 相似文献
10.
Private supplementary tutoring has long existed in Bangladesh, as elsewhere in the world, but in recent decades has become much more visible. Much tutoring “shadows” or reproduces formal schooling as fee-based academic teaching outside school hours. This paper focuses on school factors that shape demand for private supplementary tutoring in English at the secondary level, drawing on data gained from both quantitative and qualitative methods. The paper is especially concerned with urban and rural variations, noting that rates of tutoring are greater in urban areas but that many factors converge to create similarities. Private tutoring in English is highly demanded because English is a compulsory course; and in addition to being a subject in its own right, it assists in the learning of other subjects. While private tutoring may support the academic learning of some pupils, it also has problematic dimensions. As such, the spread of tutoring across urban and rural areas is not necessarily to be welcomed. 相似文献