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Research and Development, 2003. SCORED 2003. Proceedings. Student Conference on

Date 25-26 Aug. 2003

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Displaying Results 1 - 25 of 91
  • Design of entertainment mobile robot: IDAP

    Publication Year: 2003 , Page(s): 298 - 303
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (385 KB) |  | HTML iconHTML  

    Robotic system applications have advanced dramatically over the past few years. This paper presents the IDAP Robot, which is designed and fabricated by taking the first Malaysia robot games festival or Robofest 2002. Development of the IDAP Robot based on the contest regulation to place out the beach balls into the cylinder tubes. This paper focuses on strategies motion of the IDAP robot. The strategies that involve are; it can carry out eighteen beach balls in one time and it is able to place all the cylinder tubes in one track within 3 minutes. The structure design of the robot is divided into two parts namely hardware and software parts. The hardware part involves the design and development of the platform module, storage module, arm manipulator module, power supply module, permanent magnet DC motor, sensing system, control panel, circuit protection and programmable logic controller (PLC). The platform module is divided into three parts namely, Y-axis design, Z-axis design and θ-axis design. View full abstract»

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  • Lighting management system

    Publication Year: 2003 , Page(s): 309 - 312
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (190 KB) |  | HTML iconHTML  

    The development of smart lighting management system is outgrowing nowadays. The main purpose is to make lighting controls easily accessible which enables residents to make the best use of a lighting design. Selecting technologies and using them effectively is a true challenge. This project chooses lighting control, as light is the primary electrical appliance used in a house. One main switch panel has been developed where we can control all the lights in the house from different places. The developed switch panel gives convenience to users especially in time consuming. One could easily control and monitor the light in one place at one time, without going to every room to check. Panel switch is built with minimum buttons, which is user friendly, and it is easily accessed. The control system is equipped with infrared remote control that enables us easy access of the control lights, barely using any effort or energy, physically. The remote control system maximizes the usage of infrared. To on or off the light, one only needs to move his/her hand and points the available remote to the selected light. Any remote control can be used as the system works due to the steps specified. This system is convenient and helpful to unable person such as elderly or disabled. View full abstract»

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  • Room access monitoring system

    Publication Year: 2003 , Page(s): 304 - 308
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (234 KB) |  | HTML iconHTML  

    This paper presents a room access monitoring system, which integrates computer and microcontroller MOTOROLA MC68HC11A8. Assembly language is used to program the microcontroller and Visual Basic 6 (VB) is used to develop the monitoring system. The monitoring system is divided into server side program (Eyewatch) and client side program. The server side program informs the user about the door status through the client side program. The purpose to develop client side program is to enable user far apart from the door, know the status whether the door is block or not. The microcontroller is integrated with a keypad and LCD display. Only an authorized person can enter the room. If an unauthorized person trying to break through the door, an alarm will be activated. View full abstract»

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  • Performance of multiuser detection combining with multicarrier on Nakagami fading channels for DS/CDMA transmission systems

    Publication Year: 2003 , Page(s): 313 - 318
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (243 KB) |  | HTML iconHTML  

    This paper combines multiuser detection and multicarrier signaling technique for direct sequence code division multiple access system (DS/CDMA). These techniques are analyzed in multipath fading environment. The receiver provides a decorrelating detector for each carrier and the outputs of the correlators are combined with a maximal-ratio combiner. The system performance is evaluated over Nakagami fading channels in the presence of partial band interference with numerical method. The system performance of multiuser detection combining multi-carrier DS/CDMA with the conventional single-carrier decorrelating detector was also compared. View full abstract»

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  • Sliding mode control design for active suspension on a half-car model

    Publication Year: 2003 , Page(s): 36 - 42
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (247 KB) |  | HTML iconHTML  

    The purpose of this paper is to present a new robust strategy in controlling the active suspension system. The strategy utilized the proportional integral sliding mode control scheme. A half-car model is used in the study and the performance of the controller is compared to the linear quadratic regulator and with the existing passive suspension system. A simulation study is performed to prove the effectiveness and robustness of the control approach. View full abstract»

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  • Harmonic reduction in a boost-star three-phase single switch power factor correction circuit operating in discontinuous conduction mode

    Publication Year: 2003 , Page(s): 218 - 223
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (314 KB) |  | HTML iconHTML  

    A harmonic injection technique, which reduces the line frequency harmonics of the single switch three-phase boost rectifier, is implemented. In this method, a periodic voltage is injected in the control circuit to vary the duty cycle of the rectifier switch within a line cycle so that the fifth-order harmonic of the input current is reduced to meet the total harmonic distortion (THD) requirement. Since the injected voltage signal, which is proportional to the inverted ac component of the rectified three-phase line-to-line input voltages is employed; the injected duty cycle variations are naturally synchronized with the three-phase line-to-neutral input voltages. View full abstract»

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  • Remote data acquisition through Internet based telemetry

    Publication Year: 2003 , Page(s): 237 - 244
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (457 KB) |  | HTML iconHTML  

    This experiment is to develop and implement an Internet based telemetry system. Telemetry is a science of automatically measuring or recording data from one or more instruments and transmitting them over a distance. The transmission of the data can be done over wires or radio waves but this experiment is implementing transmission of the data through the Internet. The system is consisting of local portion and remote portion. In the local portion, data are collected from external measuring devices (EMD) and interfaced to be stored into a local computer, which is connected to the Internet and functions as a server. In the remote portion, it consists of any remote computer that can access to the Internet and are able to access to the data from the local computer (the server) through the Internet. Hardware comprising a PIC microcontroller applied in interfacing circuits is developed to enable communication between the EMD and the local computer. Software programs are also developed for getting data and presenting Web pages to the user at both the local and remote computers. With the Internet based telemetry system, measured data can be accessed globally. View full abstract»

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  • Indirect detection of multi-wave length for infrared wireless communications in the room and public area services

    Publication Year: 2003 , Page(s): 325 - 329
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (231 KB) |  | HTML iconHTML  

    In this paper, optical multi-wavelength modulation is proposed to reduce the effects of intersymbol interference (ISI) on the artificial light noise and multi path channels. The noise model in the room is the additive white Gaussian noise (AWGN), and multi wavelength optical modulation schemes are used for on off keying (OOK). An infrareds link in the room or public area services used intensity modulation and direct detection (IM/DD). The normal room and some interior in this case are used to study the obstruction and the reflex effect to the communications speed rate at 10-100 Mbps. Finally each performance of BER per transmitted light power of multi-wavelength infrared system is compared. The carrier characteristic of multi-wavelength is improved to be same as RF-carriers on mobiles applications. View full abstract»

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  • The analysis of cause from fusion splice in single mode optic fiber for reducing splicing loss between fusion splicing

    Publication Year: 2003 , Page(s): 330 - 333
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (210 KB) |  | HTML iconHTML  

    This article is study on loss from fusion splice for single mode optic fibers from any errors in order to find out the actual loss cause. The loss from fusion splicing is compared with the loss obtained from simulation. The result can predict the error caused by fusion splicing. It is an actual error at junction, so fusion splicing loss of fiber optic can be reduced. Sometimes, the technician just notices that fusion splicing has some loss but he does not know the actual cause. Researcher want to find out and prepare the Microsoft access program for checking loss and cause from any errors. It is useful for the technician to train and to decrease any errors from fusion splice. The heat to be radiated from fusion splice and parameters of fusion splice are important to be considered. The comparison involves the development of optic fiber to the gateway of data high speed. This simulation is technically easy and can do actual performance and can be adapted to telecommunications system. View full abstract»

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  • Smart remotely access distributed system

    Publication Year: 2003 , Page(s): 360 - 361
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (109 KB) |  | HTML iconHTML  

    This paper presents the data distribution called smart remotely access distributed system (SRA-DS). One of the stated purposes of the SRA-DS is to provide a standard to users in order to provide constantly available system that satisfy trust requirement for network applications. The trend in today's technology is no longer used in stand-alone units. One of the major criticisms of this feature is not constant availability. The purpose of this paper is to discuss the various aspects of monitoring and fault tolerant required for distributed system, and to describe the requirements needed in criteria from which can provide a low cost Web applications with distributed system. View full abstract»

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  • Driver fatigue detection using steering grip force

    Publication Year: 2003 , Page(s): 45 - 48
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (173 KB) |  | HTML iconHTML  

    This paper describes an automobile driver fatigue detection method by monitoring the driver's grip force on the steering wheel, based on the variation in steering grip force due to fatigue or loosing alertness. Steering grip force data is obtained by using two resistive force sensors attached to the steering wheel and connected to a personal computer with the aid of a data acquisition module. The alertness of the driver is then assessed by utilizing change detection algorithm based on log-likelihood ratio. The aforementioned system is a module of a driver safety system for smart vehicle, which uses sensor fusion technology to prevent driver-related road accidents. View full abstract»

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  • Fractal patch antenna for GPS application

    Publication Year: 2003 , Page(s): 102 - 104
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (120 KB) |  | HTML iconHTML  

    Fractal patch antenna is proposed to reduce the size with miniaturization technique, not only for the single element structure, but also in an array design. This paper presents the design of fractal patch antenna based on the basic structure of square antenna operate at 1.575 GHz for global positioning system (GPS) application. The fractal design is introduced into the basic structure intended to reduce the frequency of operation. Hence, miniaturization can be achieved. Simulation has been performed on several sets of the design structures using ensemble SV software. The frequency imposed by the fractal structure is lower than the basic structure. View full abstract»

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  • Cableless battery charger using induction technique for electric vehicles

    Publication Year: 2003 , Page(s): 207 - 211
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (247 KB) |  | HTML iconHTML  

    Electromagnetic induction is the production of an electromotive force in a conductor as a result of a changing magnetic field about the conductor. The induced emf always such that it opposes the change that gives rise to it, according to Lenz's law. In our work, we are considering in controlling the magnetic flux distribution through an air-gap during the energy transfer from the source to load. This research has put a core situation in investigating the possible ways of charging the batteries via mutual induction as in transformers. This enables the charging process to be cableless. It involves two coils transferring energy from one to the other through air in the most efficient way. Our work is presented in this paper. Simulation and hardware implementation has been carried out successfully. We have measured the magnetic flux density for ac input voltage of 100 Volt with different frequency values. The optimum frequency in our design is 25 Hz. We found that it is possible to control the magnetic flux distribution during energy transmission by optimizing the frequency and shielding the flux path. View full abstract»

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  • Voltage regulation of uninterrupted power supplies

    Publication Year: 2003 , Page(s): 385 - 389
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (221 KB) |  | HTML iconHTML  

    Uninterrupted power supply (UPS) systems are used as one solution of power quality problems and to provide ultimate protection for power disturbances such as power blackouts and brownouts. Many UPS systems suffer from poor output voltage regulation especially with heavy loads. This work is aimed to design and implement the UPS hardware system capable of producing continuous and constant 230 Vac, 50 Hz output supply. A feedback loop has been implemented using microcontroller to adjust the dc level supplying the UPS inverter. At the end of the hardware implementation, tests have been carried out to determine the reliability and effectiveness of the designed system, and good results have been obtained in improving the voltage regulation. View full abstract»

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  • BIuetooth wireless technology low profile printed antenna

    Publication Year: 2003 , Page(s): 90 - 93
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (146 KB) |  | HTML iconHTML  

    Bluetooth wireless technology provides short-range wireless voice and data communication in the industrial, scientific and medical (ISM) band of radio spectrum. This paper describes several half wave printed dipole antennas with offset feed operating at Bluetooth frequency of 2.45 GHz. Two variation of feeding techniques have been employed, namely the side feed and direct feed. Direct feed techniques were incorporated in some structures in order to reduce antennas size. A corresponding rectangular patch antenna operating at the same frequency is also designed for comparison purposes. Numerical simulations have been carried out on the designed structures using micropatch and Sonnetlite softwares. The antennas have been fabricated on GML laminates and tested. Measured one port results showed that all the antennas are well-matched at their corresponding frequency of operation. The co-polarisation radiation patterns exhibit broad beamwidths. View full abstract»

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  • Software development for energy auditing practice

    Publication Year: 2003 , Page(s): 420 - 423
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (238 KB) |  | HTML iconHTML  

    This paper presents the development of the software to calculate the energy usage. This software can be operated as an expert system. Basic architecture of the expert system contains knowledge base (database), inference engine (decision), graphical user interface (GUI), user and output (energy audit report). Mainly, this software was developed by using Microsoft Visual Basic as a programming language tool that can build the GUI. After testing it with previous and present collected energy data, this software can display the energy audit report. It presents total amount of energy usage in kWh/day, kWh/month and total energy cost in RM. View full abstract»

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  • Expert system for characterization of electroencephalography (EEG) signals to detect sleep onset

    Publication Year: 2003 , Page(s): 5 - 8
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (196 KB) |  | HTML iconHTML  

    This paper describes the development of an approach that uses expert system to differentiate various stages of sleep: i.e. from awake state to stage II sleep. An expert system that performs sleep staging using the characteristics analysis of the human sleeps electroencephalography (EEG) signals are presented. The Kappa PC expert system shell, the frequencies and waveforms characteristics of the EEG signals were used in the implementation of the sleep on set detection. View full abstract»

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  • Technical animation experiments based on keyframe animation and motion capture

    Publication Year: 2003 , Page(s): 362 - 367
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (368 KB) |  | HTML iconHTML  

    This paper is an extension from the previous paper entitled "keyframe animation and motion capture for creating animation". In order to observe, analyse and compare the results between these two methods namely motion capture and keyframe animation, the author attempts an experiment. This experiment is mainly divided into two sub-objects: motion capture and keyframe. Each sub-object consists of three modules namely: walking, running and jumping. A set of comparative results is provided at the end of these experiments. View full abstract»

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  • Micro controller based adjustable closed-loop dc motor speed controller

    Publication Year: 2003 , Page(s): 59 - 63
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (232 KB) |  | HTML iconHTML  

    The speed control of dc motor is very crucial, especially in applications where precision and protection are of essence. Different methods employing solid-state switches are available for a precise control for speed and protection of dc motor. In this paper, the use of micro controller for speed control and protection of dc motor is presented. The peculiarity of this method is its adaptability to different ratings of motors. Experimental results have been obtained which show the employment of microcontroller for acceleration, speed reversal, and deceleration and over current protection of a dc motor. View full abstract»

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  • Developing a distributed stock exchange application using CORBA

    Publication Year: 2003 , Page(s): 146 - 153
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (434 KB) |  | HTML iconHTML  

    Distributed computing has emerged as a promising solution to the inherent drawbacks of monolithic (stand-alone) computing. Common object request broker architecture (CORBA) has become a de facto in developing distributed applications due to its standardized architecture, and easy interoperability among distributed components managed by an object request broker (ORB). This paper describes how CORBA standard was successfully used in developing a distributed stock exchange application, a typical three tiers (clients, brokers, stock exchange) application that has many distributed components and a high database hit rate. The Kuala Lumpur stock exchange (KLSE) was taken as a model of study in developing this application. CORBA event service was heavily used to cater for the communication needs of this application. Unified modeling language (UML) was used to develop the analysis and design deliverables of the application while VisiBroker and Java were respectively the ORB and programming language used to implement the interface definition language (IDL) files developed. View full abstract»

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  • A novel feature selection and extraction method for neural network based transfer capability assessment of power systems

    Publication Year: 2003 , Page(s): 401 - 406
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (316 KB) |  | HTML iconHTML  

    A new feature selection and extraction method is presented in this paper for the neural network (NN) based available transfer capability assessment in the deregulated power system. The objective of feature selection and extraction is to speed up the NN training process and to achieve a more accurate NN results. The proposed method is known as the SDFT method in which it is a combination of the sensitivity and discrete Fourier transform methods. The sensitivity analysis is first used in selecting the input features and then followed by the discrete Fourier transform (DFT) method for extracting NN input features. The hypothesis set of pre-selected data performed by the sensitivity method only offers no improvement in the NN training performance in such cases where many features are highly correlated. Thus, the DFT method is considered so as to extract the pre-selected data to a set of meaningful extracted data. To illustrate the effectiveness of the proposed method, a comparative study of the SDFT, DFT and sensitivity methods is made so as to investigate the effectiveness of the methods in extracting and selecting the NN features. In this study, the NN based available transfer capability assessment has been performed on the Malaysian power system. View full abstract»

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  • A block coded amplitude clipping and filtering for peak-to-average power ratio in orthogonal frequency division multiplexing system

    Publication Year: 2003 , Page(s): 105 - 108
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (175 KB) |  | HTML iconHTML  

    One of the major setbacks of orthogonal frequency multiplexing (OFDM) is its peak-to-average power ratio (PAPR). In this paper, an investigation of block coded amplitude clipping and filtering method to reduce further the PAPR in OFDM system is presented. The BER performance of this method is also analyzed. It is shown through simulation that the block coded amplitude clipping and filtering method improves the PAPR and BER performance as compared to a block coding technique. View full abstract»

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  • Analysis of heart sounds based on continuous wavelet transform

    Publication Year: 2003 , Page(s): 19 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (134 KB) |  | HTML iconHTML  

    This paper presents the application of wavelet transform analysis method to the heart sounds signal. The heart sounds is a non-stationery signal, thus it is very important to study the frequency and time information. One of the time-frequency analysis methods is short time Fourier transforms. However, the STFT analysis is limited by the time and frequency resolution. The wavelet transform was introduced to curb the resolution problem in STFT. The wavelet transform is a multi-resolution time-scale analysis that gives high resolution for low frequency components and low resolution for high frequency components. Since majority of heart sounds component lies in low frequency, thus the application of wavelet transform to heart sounds is very suitable. Results in time-frequency representation clearly show that the wavelet transform is capable to distinguish between the normal with a few types of abnormal heart sounds. The murmurs caused by particular heart diseases such as aortic regurgitation, aortic stenosis, mitral regurgitation, mitral stenosis, pulmonary regurgitation and tricuspid regurgitation were clearly shown under continuous wavelet representation. View full abstract»

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  • A study on characterization of gate oxide shorts using non-split model

    Publication Year: 2003 , Page(s): 188 - 192
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (257 KB) |  | HTML iconHTML  

    The integrity of gate oxide shorts (GOS) model is a key factor as quality and reliability indicator of CMOS. Gate oxide defects in MOS transistors can be considered as the layout and technology dependent failures for which logic fault models are not always available, requiring electrical models to simulate the defect characteristics. Previously the GOS have been modeled with split transistors technique using two minor transistors and lumped elements. However, it is problematic to study minimum size transistors affected by GOS failures using the existing unidirectional split model as the channel length is designed at minimum size in particular technology process. This paper presents a study to compare and correlate between split model and non-split model of GOS. View full abstract»

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  • Analysis performance of L-PPM infrared wireless communications for indoor LOS and diffuse links

    Publication Year: 2003 , Page(s): 348 - 353
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (293 KB) |  | HTML iconHTML  

    In this paper, we present the efficiency and performance of pulse position modulation (L-PPM) for indoor wireless infrared communication system. By physical characteristic of infrared channels using intensity modulation with direct detection (IM/DD). Noise in the channel is considered as additive white Gaussian noise. We evaluate power and bandwidth efficiency compared with on off keying (OOK). We have computed the path loss versus horizontal separation between transmitter and receiver in LOS and diffuse link, and our results show the best average power efficiency among the modulation techniques, which are presented for 2, 4, 8, 16, 32, and 64 PPM at bit rates of 10 Mb/s to 100 Mb/s. Finally, we present Monte Carlo simulation results to bit error probability and the best signal to noise ratio that L-pulse position modulation requirement. View full abstract»

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