Optimization of fuzzy model using genetic algorithm for process control application     

Rubiyah Yusof  Ribhan Zafira Abdul Rahman  Marzuki Khalid  Mohd Faisal Ibrahim 《Journal of The Franklin Institute》2011,348(7):1717-1737

A technique for the modeling of nonlinear control processes using fuzzy modeling approach based on the Takagi-Sugeno fuzzy model with a combination of genetic algorithm and recursive least square is proposed. This paper discusses the identification of the parameters at the antecedent and consequent parts of the fuzzy model. For the antecedent fuzzy parameters, genetic algorithm is used to tune them while at the consequent part, recursive least squares approach is used to identify the system parameters. This approach is applied to a process control rig with three subsystems: a heating element, a heat exchanger and a compartment tank. Experimental results show that the proposed approach provides better modeling when compared with Takagi Sugeno fuzzy modeling technique and the linear modeling approach.  相似文献   

Design and optimization of an instrument for measuring bughole rating of concrete surfaces     

Tarik Ozkul  Ismail Kucuk 《Journal of The Franklin Institute》2011,348(7):1377-1392

Bugholes are surface imperfections that appear as small pits and craters on concrete surface after the casting process. Bugholes are cosmetic surface imperfections and do not affect the structural integrity of the concrete structure. However, existences of these imperfections increase cost since bugholes require additional surface preparations before painting or finishing the concrete surface. Additionally, these surface imperfections cause secondary problems by decreasing the cover on RC making incretion of salts into the reinforcement bars inside RC. In this paper, authors discuss development of a new device to measure “bughole” rating of concrete surface. The innovative technique used in design enables us to manufacture a compact instrument, which is physically small, lightweight and practical. The paper explains the design principles of the device and the procedure used for optimization of design parameters for the best performance. Last section of the paper gives simulation results to compare the performance of the device to current state of the art methods used for bughole rating in industry.  相似文献   

Quality of work life of librarians in government academic libraries in the Klang Valley, Malaysia     

Rafidah Abdul Aziz  Fuziah Mohd Nadzar  Haslinda Husaini  Asmah Maarof  Salleh Mohd Radzi  Izhairi Ismail 《International Information and Library Review》2011,43(3):149-158

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Students’ Perceptions of Their Science Teachers’ Pedagogical Content Knowledge     

Lilia Halim  Sharifah Intan Sharina Syed Abdullah  T. Subahan Mohd Meerah 《Journal of Science Education and Technology》2014,23(2):227-237

Pedagogical content knowledge (PCK) is a type of teacher knowledge to be developed by a teacher. PCK is said to contribute to effective teaching. Most studies investigated the development of PCK and its influence on students’ learning from the teachers’ perspectives. Only a limited number of studies have investigated the components of science teachers’ PCK that helped students’ learning from the perspective of students. Thus, it is the aim of this study to investigate the level of science teachers’ PCK from students’ perspective, in particular whether or not students of different achieving ability had different views of teachers’ PCK in assisting their learning and understanding. Based on the PCK research literature, six components of PCK have been identified, which were as follows: (1) subject matter knowledge, (2) knowledge of teaching strategies, (3) knowledge of concept representation, (4) knowledge of teaching context, (5) knowledge of students, and (6) knowledge of assessment in learning science. A questionnaire consisting of 56 items on a five-point Likert-type scale were used for data collection from 316 Form Four students (16 years old). One-way analysis of variance revealed that the differences in science teachers’ PCK identified by students of different achieving abilities were statistically significant. Overall, students of various academic achieving abilities considered all the components of PCK as important. The low-achieving students viewed all the components of PCK as being less important compared to the high and moderate achievers. In particular, low-achieving students do not view ‘knowledge of concept representation’ as important for effective teaching. They valued the fact that teachers should be alert to their needs, such as being sensitive to students’ reactions and preparing additional learning materials. This study has revealed that PCK of science teachers should be different for high and low-achieving students and knowledge of students’ understanding plays a critical role in shaping teachers PCK.  相似文献   

The effects of Ramadan intermittent fasting on athletic performance: recommendations for the maintenance of physical fitness     

Chaouachi A  Leiper JB  Chtourou H  Aziz AR  Chamari K 《Journal of sports sciences》2012,30(Z1):S53-S73

The behavioural modifications that accompany Ramadan intermittent fasting (RIF) are usually associated with some alterations in the metabolic, physiological, and psychological responses of athletes that may affect sport performance. Muslim athletes who are required to train and/or compete during the month-long, diurnal fast must adopt coping strategies that allow them to maintain physical fitness and motivation if they are to perform at the highest level. This updated review aims to present the current state of knowledge of the effects of RIF on training and performance, focusing on key-factors that contribute to the effects of Ramadan on exercise performance: energy restriction, sleep deprivation, circadian rhythm perturbation, dehydration, and alterations in the training load. The available literature contain few studies that have examined the effects of RIF on physical performance in athletes and, to date, the results are inconclusive, so the effects of RIF on competition outcomes are not at present wholly understood. The diverse findings probably indicate individual differences in the adaptability and self-generated coping strategies of athletes during fasting and training. However, the results of the small number of well-controlled studies that have examined the effects of Ramadan on athletic performance suggest that few aspects of physical fitness are negatively affected, and where decrements are observed these are usually modest. Subjective feelings of fatigue and other mood indicators are often cited as implying additional stress on the athlete throughout Ramadan, but most studies show that these factors may not result in decreases in performance and that perceived exercise intensity is unlikely to increase to any significant degree. Current evidence from good, well-controlled research supports the conclusion that athletes who maintain their total energy and macronutrient intake, training load, body composition, and sleep length and quality are unlikely to suffer any substantial decrements in performance during Ramadan. Further research is required to determine the effect of RIF on the most challenging events or exercise protocols and on elite athletes competing in extreme environments.  相似文献   

Strategies for maintaining fitness and performance during Ramadan     

Kirkendall DT  Chaouachi A  Aziz AR  Chamari K 《Journal of sports sciences》2012,30(Z1):S103-S108

The Muslim athlete, whether living in a Muslim majority country or in a non-Muslim country, face unique challenges to faithfully follow one of the pillars of their faith - Ramadan - while attempting to maintain their participation in sports training and competition. There are conflicting reports on the effects of Ramadan on fitness and physical performance in general and in football in particular. In general, the impact of a brief daytime fast has minor effects on health or factors of physical fitness. Add physical training and now a new set of barriers to both performance and the observance of Ramadan begin to interact. Practising athletes have worked out strategies to cope with the rigors of Ramadan; strategies that have both physical (training modifications, dietary habits, rest and recovery) and emotional (patience, emotional preparations) domains. Carefully blending strategies like these can help the football player be true to their faith and follow the tenants of Ramadan hopefully, with a minimum of impact on their physical performance. In this context, science can help coaches improve their training plans and educate players with respect to the challenges presented by Ramadan to all levels of sports participation.  相似文献   

Tide–surge interaction model including air bubble effects for the coast of Bangladesh     

Gour Chandra Paul  Ahmad Izani Md. Ismail 《Journal of The Franklin Institute》2012,349(8):2530-2546

An estimate of water levels due to the interaction of tide and surge associated with a storm including air bubble effects is made along the coastal region of Bangladesh. For this purpose, a vertically integrated shallow water model in Cartesian coordinate system is developed introducing air bubbles and is solved using nested finite difference schemes. A fine grid model covering the region between 21°15′N to 23°N and 89°E to 92° E has been nested into a coarse grid model covering the region between 15°N to 23°N and 85°E to 95°E in the Bay of Bengal to incorporate all the major islands and coastal bending accurately. By applying tidal forcing through the southern open boundary of the coarse grid model appropriate tidal conditions are generated in the problem domain. Numerical experiments are performed with the help of the model to simulate water levels due to tide and surge interaction including air bubble effects associated with the tropical storm of April 1991. The model results are found to be reasonable and the model can be found to simulate higher water levels in the presence of air bubbles.  相似文献   

Teachers’ perception of mobile edutainment for special needs learners: the Malaysian case     

Anuar Mohd Yusof  Esther Gnanamalar Sarojini Daniel  Wah Yun Low  Kamarulzaman Ab. Aziz 《International Journal of Inclusive Education》2013,17(12):1237-1246

Study of Malaysian adoption of mobile learning (m-learning) is still in the early stages. However, there are numerous researchers in the country exploring the potential and application of m-learning in the Malaysian education system, including special education. A key question is whether teachers are prepared to incorporate mobile technology as part of their teaching tools or do teachers perceive mobile technology only as personal communication gadgets. This paper investigates teachers' perception of m-learning applications in special education classes. Interviews were conducted to collect related information on teachers' perceptions of m-learning in the selected schools. The teachers expressed that there are limited resources to cater to the attention of special needs learners and they believed edutainment technologies such as augmented reality, game-based educational software and animation projects could be the answer. The benefits and challenges of implementing blended learning for special education are also discussed. The paper concludes by summarising the current environment of m-learning in Malaysian special needs education, together with recommendations for future use of the technology.  相似文献   

Crowdsourcing: A Platform for Crowd Engagement in the Publishing Industry     

Siti Ezaleila Mustafa  Hamedi Mohd Adnan 《Publishing Research Quarterly》2017,33(3):283-296

Publishers will usually make decisions based on their experience and knowledge in book publishing. However, there are risks of losses as markets can be unpredictable. Now, with the availability of various online social platforms, “crowdsourcing” is being used by publishers and authors to gather new ideas and innovations. This article will analyze how the crowdsourcing platform is used by industry players to attract active participation from the public, especially in the title development process. Publishers or authors also need to understand which platform is appropriate and how to use the platforms as a marketing communication tool. The netnography approach will be used to gather and analyze the data related to the specific subject area of the study, including literature review and online observation. Based on our observations, platforms such Wattpad and Ilham Karangkraf are popular among Malaysian authors and publishers, and had been used to get crowd engagement as well as to communicate with readers. With it, sometimes a work that has many readers or followers will be published.  相似文献   

Determinants of Malaysian adult learners＇ distance learning     

Erlane K. Ghani Jamaliah Said Noraini Mohd Nasir 《美中教育评论》2008,5(5):17-26

This study attempts to identify the factors perceived to be important in choosing an Institution of Higher Learning （IHL） for distance learning. One thousand five hundred questionnaires were distributed to the first year students in the social sciences distance learning programs and 980 valid responses were received of Malaysian public university. The results show that the top three factors influencing their preferred institution are qualification recognition IHL, future career advancement, and personal satisfaction. The results of this study provide insights to the IHL, employers and academics on the nature and relative importance of the factors perceived important for adult learners in the selection of their preferred IHL.  相似文献