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Articles by M.A. Hannan
Total Records ( 12 ) for M.A. Hannan
  M.A. Hannan , A. Mohamed , A. Hussain and Majid al Dabbay
  This study describes the derivation of an analytical model and simulation for the unified series-shunt compensator (USSC) for investigating power quality in power distribution system. The USSC simulation comprises of two 12-pulse inverters which were connected in series and in shunt with the system. A generalized sinusoidal pulse width modulation (SPWM) switching technique was developed in the proposed controller for fast control action of the USSC. Simulations were carried out using the PSCAD/EMTDC electromagnetic transient programs to examine the performance of the USSC model. Simulation results from the proposed model demonstrated the performance of the USSC and its effectiveness for voltage sag compensation, flicker reduction, voltage unbalance mitigation, power flow control and harmonics elimination.
  D.A. Wahab , N.F. Adull Manan , M.A. Hannan , S. Abdullah and A. Hussain
  Today, intelligent safety systems are installed in modern cars in view of minimising road hazards. An intelligent air bag system for example, comprised several subsystems that are integrated to include the weight sensor system, image sensor system, crash sensor system and tyre pressure monitoring system. These systems when poorly positioned into the car seat, will certainly affect comfort and reliability of the car seat. This research presents the design work on an intelligent car seat, which is equipped with a load cell type-sensory system. The load cells are used to detect the weight of a passenger for the deployment of an air bag system. The proposed design is validated against displacement and stress analysis using an 80 kg load to simulate the weight of a passenger. Results from the design validation indicated that the proposed configuration and material is appropriate for use in the intelligent car seat application.
  M.A. Hannan , A. Mohamed , A. Hussain and Majid al Dabbay
  This study describes the derivation of an analytical model and simulation for the unified series-shunt compensator (USSC) for investigating power quality in power distribution system. The USSC simulation comprises of two 12-pulse inverters which were connected in series and in shunt with the system. A generalized sinusoidal pulse width modulation (SPWM) switching technique was developed in the proposed controller for fast control action of the USSC. Simulations were carried out using the PSCAD/EMTDC electromagnetic transient programs to examine the performance of the USSC model. Simulation results from the proposed model demonstrated the performance of the USSC and its effectiveness for voltage sag compensation, flicker reduction, voltage unbalance mitigation, power flow control and harmonics elimination.
  M.S. Javadi , M.A. Hannan , S.A. Samad and A. Hussain
  The intelligence of the vehicle is identified by the surrounding environment. Lane detection is one of the vision-based features that used for assisting and controlling tasks for the intelligent vehicles. In this study, an overview of lane detection approaches is presented and then a model, based on inverse perspective mapping, edge detection and fitting lines algorithm is introduced. The system was tested on the urban road image data base in different light conditions. The performance of the system in term of lane marking detection was 97.2%. The results were accurate and robust with respect to the shadows and worn lane markings and also appropriate for real time procedure.
  M.S. Javadi , S. Habib and M.A. Hannan
  Inter-Vehicle Communication (IVC) has presented a promising role in vehicular technology to fulfill a variety of applications to improve safety and traffic flow. This article outlines IVC taxonomy, applications and challenges. Current trends of vehicular communication technologies are explained including classification, functions, applications, missions, requirements, advantages and disadvantages, respectively. Many IVC applications have been investigated from the literature to provide safe, comfortable and reliable vehicular operations. In this article, the recent research trends and development activities in inter-vehicle communications have been critically reviewed, emphasizing the areas where further work is needed. It is found that the continuous developing technology will certainly push the future market of high-quality IVC systems. However, the issues and challenges of the existing IVC system such as data aggregation, distribution, hardware/software compatibility, nodes density, security, mobility, market, etc. are highlighted to future system development. Thus, this study will lead the increasing need to develop new and improved IVC technology for many applications.
  S. Habib , M.A. Hannan , M.S. Javadi , S.A. Samad , A.M. Muad and A. Hussain
  Wireless communication technologies have emerged vehicular networks in the forms of Intra-Vehicle (InV), Vehicle-to-Vehicle (V2V) and Vehicle-to- Infrastructure (V2I) communications. These technologies enable a variety of applications for driver and passenger needs, such as safety, convenience and entertainment facilities incorporated into modern automobile designs. The researchers exploit the different services that will enable to exchange useful information with-inside and with-outside vehicle via vehicular networks. Vehicles exchange information about their state, view of current road, navigation information and other general information about weather report and digital map update. A key for exchanging information in timely manner is an opportunity to access the medium for longer life with low power consumption in various ranges. They provide high reliability without experiencing long and uncertain delay. Thus, widespread adoption of vehicular networks is fast becoming a reality, where additional functions will be provide by the car electronics and the passengers will be able to access the Internet and other core network resources. This study presents an overview of the potential wireless technologies for data exchange in a various ranges, its current research activities, issues and challenges that exist in each wireless technology.
  S.K. Biswas , A. Chowdhury , J. Das , U.K. Karmakar , S.Z. Raihan , A.C. Das , M.A. Hannan , M.A. Monsur Dinar , M.J. Hassan , M.I. Hossain and M.R. Farhad
  Cuscuta epithymum Murr. (Convolvulaceae) is found in Bangladesh and has been used in traditional medicine. The present study was designed to investigate the preliminary phytochemical screening, cytotoxicity and antibacterial activities of the methanol extract of the plant stem. The preliminary phytochemical analysis was performed on the basis of the standard procedures and thin layer chromatography to confirm the presence of chemical compounds in the methanol extract of the plant. The minimum inhibitory concentration and cytotoxic activities of the extract were carried out according to broth dilution assay and brine shrimp lethality bioassay, respectively. The results of preliminary phytochemical analysis showed the presence of flavonoid, glycoside, alkaloids, carbohydrates, saponins and steroids in the plant extract. In this study, the methanol extract was subjected to Thin Layer Chromatography (TLC) in order to detect the phytoconstituents present in the extract and the best result of TLC was obtained from the solvent system comprising of toluene and ethyl acetate at the ratio of 5.5:4.5 which identified the maximum number of spots. Moreover, the extract showed moderate antibacterial activities against Bacillus megaterium, Pseudomonas aeruginosa, Escherichia coli and Salmonella typhi with MIC values of 4.96±0.20, 3.03±0.16, 3.47±0.20 and 4.07±0.08 mg mL-1, respectively. The methanol extract showed lethality against brine shrimp nauplii (LC50: 36.31 μg mL-1 and LC90: 83.18 μg mL-1 ). The results indicated that the methanol extract of the stem of the plant possessed antibacterial and cytotoxic properties with several numbers of chemical compounds.
  M.A. Hannan , A. Hussain , A. Mohamed and S.A. Samad
  The main objective of the study is to analyze Tire Pressure Monitoring System (TPMS) data that contributes significantly towards the enhancement of the intelligent vehicle performance evaluation. TPMS pressure and temperature data were collected from the prototype model of the MEMS Tire Pressure Module (TPM) that was fitted on to an intelligent tire rim through its receiver. In this study, we are focusing only analytical data analysis of TPMS. In the analytical study, a novel method for data classification, goodness of fit and hypothesis testing was proposed. A classification scheme was employed to classify the temperature and pressure data based on ID at the quadrant basis operating zone of the Front Right (FR), Front Left (FL), Rear Left (RL) and Rear Right (RR) tires. Principle Component Analysis (PCA) with polynomial fitting for exploring goodness of fit of tire data was also applied. Finally, hypothesis testing using Satterthwaite statistic was carried out. Results obtained are in agreement with the null hypothesis and as such validate the usefulness of the TPMS system in maintaining and enhancing vehicle performance.
  M.A. Hannan and K.W. Chan
  The objective of the research is to provide the application of Generalized Average models of FACTS device, TCSC and custom power device, DVR for power system transient analysis within dynamic phasor approach. The dynamic phasor models of TCSC and DVR are evaluated through simulation of realistic network model of 3 machines 9 bus WECC system. The continuous-time large signal models of TCSC and DVR under a fault condition captured the phasor dynamics of key wave forms. It is found that the increase transient stability and improve power quality response of dynamic phasor model of TCSC and DVR, respectively are closely hugged with the detail time domain EMTP simulation. Numerical simulation of phasor dynamics with larger size steps through solving differential equation is also faster than that of EMTP. Both EMTP and theoretical framework of dynamic phasor models has been simulated using Simulink/Matlab dynamic system modelling software.
  M.A. Hannan , Azah Mohamed and Aini Hussain
  This study deals with the application of a Solid-state Transfer Switch (SSTS) for protection in the distribution system that has been evaluated through modeling and simulation. The modeling of this SSTS is based on graphic models using the electromagnetic transient simulation program PSCAD/EMTDC. The SSTS for protection in distribution systems has been modeled with the objective of achieving faster interruptions. In the SSTS model, a new control scheme based on Park`s transformation theory and three-phase proportional integral controlled phase locked loop has been proposed. Extensive simulations were carried out to validate the performance of the SSTS to transfer power to the load from a faulted feeder to a healthy one in a short period of time. Simulation results obtained also prove that the SSTS can mitigate voltage sag and protect bus bar voltage from various types of faults. It is observed that the impact of the induction motor load on the performance of the SSTS in which it has a higher time delay to complete the transfer process as compared to the system with static loads. The effectiveness of SSTS was also evaluated under various faults and load conditions and compared with the IEEE benchmark system STS-1 in terms of transfer time.
  M.A. Hannan , R.A. Begum , M.F. Romely , A. Mohamed and A. Hussain
  The Power Quality (PQ) is one of the main issues in the Malaysian industries. The issue is not just a power quality but also loss of profit as well. Thus, the industrial PQ problem is an important area of research in term of classification, assessment and awareness development. This study developed a framework of survey design, data collection and an analytical model for the statistical classification of the PQ problem and its severity level in Malaysia based on the practical perception of industrial respondents. A statistical classification is done by affected equipments and the matching correlation value between PQ severity level and the normalization duration. The identified PQ Severity Factors (PQSF) are considered for different types of equipment for industrial PQ problem. The findings will assist in the formulation of appropriate policies that address the industrial PQ problem in Malaysia as well as indirectly improving the industrial PQ in the country.
  J. Das , S.K. Biswas , A. Chowdhury , S.R. Sharif and M.A. Hannan
  The petroleum ether extract of stem barks of Moringa oleifera Lam. was evaluated for antibacterial and antifungal activities. Ten bacterial strains were used in the study for antibacterial activities while six species of fungi were also bioassayed for their response to the extract. Agar disc diffusion method was used for antibacterial and antifungal assay of the petroleum ether extract at 500 μg disc-1. The results were also compared with the standard drugs, amoxicillin (10 μg disc-1) and griseofulvin (10 μg disc-1). The obtained results showed inactivity of the petroleum ether extract to all of the tested bacterial and fungal strains.
 
 
 
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