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Browsing by Type "Conference paper"

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Constructing a chaos proofing pre-development framework to manage chaos in a chaos-prone systems development environment
(2008)
Othman M.
;
Zin A.M.
;
Hamdan A.R.
;
24824928800
;
8230988800
;
7004541969
When plans are disrupted to accommodate changes in a software development project, the environment becomes unstable. This brings about chaos. "Chaos" is real and we need to deal with it. This research is based on the premise that I. Chaos has a pattern, and that it is possible to learn this pattern and 2. If we are able to measure chaos, we will be able to better manage the situation brought by chaos. This paper put forth a list of chaos triggers based on findings from a case study of a chaos-prone system development project based in Malaysia. Lessons learned based on findings from a focus-group depth interview leads to the construction of a Pre Development Framework to chaos-proof system development environment. � 2008 IEEE.
10
Construction of compound nouns (CNs) for noun phrase in Malay sentence
(2012)
Ab Rahman S.
;
Omar N.
;
Che Hassan N.B.
;
57195320360
;
23397755200
;
55270265900
This paper addresses the process of compound noun construction from simple Malay sentences. To construct the compound noun, we characterize them according to the noun phrase categories in Malay sentence. All these categories are formed based on the combination of noun and noun, noun and noun modifier and noun and non-noun modifier. The noun phrase in Malay sentence is referred to as a word group with a noun as its head. The head noun is then accompanied by modifiers or compliments. The modifiers or compliments can be either noun, verb, adjective, determiner or etc. A good understanding of Malay language is an important skill for evaluating and nominating a correct compound noun found from the data collection. The compound noun then will be match with its appropriate category. We also design a general process flow to show the steps involved in creating compound noun from our data collection. The total number of compound nouns collected is important, so that the searching process becomes more widespread. A suitable searching method and data representation is also significant for handling compound nouns from a database. � 2012 IEEE.
4
Contamination of high voltage insulators in the east coast of Peninsular Malaysia
(Institute of Electrical and Electronics Engineers Inc., 2000)
Ahmad A.S.
;
Ahmad H.
;
Jidin R.B.
;
Tamsir T.
;
Ahmed S.S.
;
Buntat Z.
;
7202040740
;
7102866725
;
6508169028
;
7801658692
;
57193735776
;
57194234727
Rapid urbanization and industrialization in Malaysia over last two decades has resulted in increased demand for reliable electric power. The reliability in turn is greatly influenced by the grid system and its components being properly maintained. One of the important components is the high voltage insulators used in the switchyards, overhead lines, substations and power stations. A common phenomenon in the east cost of Peninsular Malaysia is rapid buildup of salt contamination on high voltage insulators due to the salty wind coming from the South China Sea. The main objective of this paper is to develop a mathematical model correlating Equivalent Salt Deposit Density (ESDD) with the hydrometeorological variables. The data collected at one of the plants in the east coast during the dry season has been used to develop the model by using multiple regression analysis. This model has been validated for predicting contamination accumulation level during the dry season. � 2000 IEEE.
6
Contingency based congestion management and cost minimization using bee colony optimization technique
(2010)
Rahim M.N.A.
;
Musirin I.
;
Abidin I.Z.
;
Othman M.M.
;
55323600600
;
8620004100
;
35606640500
;
35944613200
Unexpected contingency occurrence in a power system network can lead to high current flow in the system. This has made the system to be in a stressed condition which causes congestion to the system, while instability can be the next unpredictable incident. High current flow may also impose high fuel cost of the generators. Thus, congestion needs to be managed properly in order to reduce the undesired current flow in the transmission line for maintaining system security. This paper presents contingency based congestion management and cost minimization using bee colony optimization technique. In this study, bee colony optimization technique is applied to optimize the current flow in the system such that system security is preserved; considering transmission lines as the control variables. N-1 contingency is considered as the forecasted event, implemented offline so that the performance of the system can be evaluated. Cost minimization is also conducted by controlling the transmission constraints in the system. Validation through the IEEE 30-reliability test system and 6-Bus test system are conducted to simulate the scenarios. �2010 IEEE.
1
Controlled low-strength material using industrial hazardous waste incinerator bottom slag and refined kaolin
(2008)
Naganathan S.
;
Razak H.A.
;
Hamid S.N.A.
;
30267872100
;
9243893200
;
57214576239
The main purpose of this paper is to study the effect of kaolin addition on the performance of Controlled Low-Strength Material (CLSM) made using industrial hazardous waste incinerator bottom slag. Various mix formulatiuons of CLSM were made with the incinerator bottom slag, kaolin, and cement. Amount of cement added varied from 0 to 40 percent of weight of slag. Amount of kaolin added were 25, 50, 75, and 100 percent of weight of cement. Water content was adjusted to get sufficient flowability. The CLSM mixes prepared were tested for setting time, bleeding, and corrosivity in fresh state. Tests like compressive strength, California Bearing Ratio (CBR), Initial Surface Absorption (ISAT), settlement, and water absorption, were conducted on the hardened CLSM. Compressive strength tests were conducted at 7, 14, and 28 days on 70.7 mm cubes. Heavy metals analysis for bleed and leachate water was also conducted on the CLSM mixes. The 28 days compressive strength of CLSM tested ranged from 0.36 to 4.40 MPa. CBR values ranged from 10% to 46%, and ISAT values at 1 hour from 0.56 to 4.76 mL/m2/s. None of the twelve heavy metals tested exceeded the threshold limits. It is concluded that the kaolin addition in CLSM using incinerator slag showed reduction in the compressive strength, but improved performance with regard to ISAT, CBR, and water absorption. It is concluded that the incinerator slag can be developed as a new sustainable construction material in CLSM.
1
Controlled release of herbicide into water from beta-naphtoxyacetic acid-layered double hydroxide nanohybrid formulation
(2009)
Binti Jubri Z.
;
Binti Mohd Yusoff N.Z.A.
;
Binti Marsom E.S.
;
Binti Sarijo S.H.
;
35778292400
;
35753189300
;
26767937600
;
8609580900
At present, the use of huge quantities of herbicides in conventional agriculture has lead to some major environmental problems. Controlled release formulations (CRF) are now being developed to avoid such problems. The release of beta-naphtoxyacetic acid (BNOA) into aqueous solution from controlled-release formulation (CRF) prepared by the intercalation of BNOA anion into Zn-Al-layered double hydroxide (ZAL) was studied. CRF consisting of organicinorganic nanohybrid material was synthesized by coprecipitation method using BNOA as guest anion and Zn-Al-LDH as the inorganic host. As a results of successful intercalation of BNOA ion into Zn-Al-LDH, the powder X-ray diffractogram shows that the basal spacing of Zn-Al-LDH with BNOA as interlayer ion expanded from 8.93 � to 19.46 �. This expansion is to accommodate BNOA ion for the formation of Zn-Al-BNOA nanocomposite (ZAB). The reverse process, i.e., the deintercalation or release of the guest, BNOA was found to be rapid initially, followed by more sustained release thereafter and this behavior was dependent on the type of anions and the concentrations of the release medium, the aqueous solution. The mechanism of release has been interpreted on the basis ion-exchange process between the BNOA anion intercalated into the interlamellae host and carbonate or chloride and/or hydroxyl anions in the aqueous solution. �2009 IEEE.
6
Conversational Agents as Full-Pledged BDI Agents for Ambient Intelligence
(Springer Verlag, 2013)
Mustapha A.
;
Ahmad M.S.
;
Ahmad A.
;
57200530694
;
56036880900
;
55390963300
The need for conversational agents based on the Belief-Desire- Intention (BDI) architecture rise to support natural interfaces in many application areas of ambient intelligence, among which are the smart homes, health monitoring and assistance, care for the elderly, transportation, education, and tourism. The objective of this paper is to present an implementation of a conversational agent as a full-pledged BDI agent. This is achieved through mapping the BDI constructs in intelligent agents to the natural language processing components in a classic conversational agent, Eliza. Discussions focus on the process of reengineering the conversational agent technologies into BDI approach. � Springer International Publishing Switzerland 2013.
1
Convolutional encoding and viterbi decoding of data via 5.8GHz wireless LAN in an intelligent urban traffic management system
(2005)
Juleen L.
;
Mastan Z.B.K.
;
Tiong S.K.
;
16021956300
;
16022314400
;
15128307800
This paper presents an application of convolutional encoding and Viterbi decoding for vehicle traffic data enhancement in an Intelligent Urban Traffic Management System. The 5.8GHz Wireless Local Area Network (WLAN) system is employed, where the traffic data are transmitted among adjacent traffic intersections and a traffic control centre. Environmental factors such as bad weather and noise can critically influence the performance of the wireless link especially in the aspect of Bit Error Rate (BER). A nonsystematic (2, 1, 8) convolutional coding with unique configuration is developed as an error-correction mechanism to reduce the BER. Convolutional code also provides security to the encoded data due to possible unique configuration customization and data can only be retrieved using the matching decoder design. Viterbi decoding is used as it yields the maximum likelihood decoding of the convolutional code. � 2005 IEEE.
1
Correction of under-reaching in twin circuit parallel overhead lines without residual current input from the parallel line
(Institute of Electrical and Electronics Engineers Inc., 2006)
Bin Abdullah M.F.
;
Mukerjee R.N.
;
Ramachandaramurthy V.K.
;
57188825497
;
7003827066
;
6602912020
Mutual coupling poses one of the most difficult problems witnessed during single phase to earth fault, in transmission line protection. In lines, on multiple circuit towers or on the same right of way, the zero-sequence circuits of the lines get mutually coupled causing an error in the apparent impedance seen by the relay. This causes the distance protection relay at one end of the faulty line to over-reach while the one at the other end to under-reach. Also, incorrect sensing of the ground fault due to zero-sequence voltage inversion caused by mutual coupling in the zero-sequence network may lead to false trip of the neighbouring healthy line. This paper presents a non-iterative microprocessor based algorithm, not requiring residual current measurement from the parallel circuit, for computing fault distance and zero sequence compensation in basic distance relaying scheme. � 2006 IEEE.
1
Coverage performance analysis of genetic algorithm controlled smart antenna system
(2010)
Badjian M.M.
;
Thirappa K.
;
Kiong T.S.
;
Paw J.K.S.
;
Krishnan P.S.
;
26967475500
;
36994806700
;
15128307800
;
22951210700
;
36053261400
In this paper, an innovative type of smart antenna based on genetic algorithm (GA) has been developed and tested. The new GA embedded solution simplifies the control of smart antenna system with increment of the accuracy of beam coverage and decrement of beam availability in compare with the conventional switch beam smart antenna. Scanning antenna of the system determined the location of mobile users through its band passed radio frequency power detector circuitry. GA then operates to optimize and steer the coverage beams to cater for dynamic users' distribution with minimum power usage. The experiment with GA embedded control system smart antenna shows good result in beam formation and steering to handle mobile users. �2010 IEEE.
4
Cross phase polarization algorithm for fault direction determination using zero crossing method to determine phase difference
(2009)
Abidin A.A.B.Z.
;
Ramasamy A.
;
Abidin I.Z.
;
Nagi F.H.
;
25824750400
;
16023154400
;
35606640500
;
56272534200
Power systems are usually connected in a condition where there is more than one power supply or voltage source supplying a load. These systems will have protection relays to protect various equipment connected to the system. However in isolating a fault, the direction of the fault needs to be known in order to limit the amount of loss load. This paper shall describe a possible algorithm that could be used in order to perform cross phase polarization. The possible faults that could be detected using this technique include the single phase to ground fault, the phase to phase fault and the double phase to ground fault. Three phase faults require the memory polarization technique that will not be discussed in this paper. The algorithm shall be implemented and tested using the sim power system tool box present in MATLAB. �2009 IEEE.
A cross-layer approach in enabling multimedia transmission over cognitive UWB network
(2011)
Mohd Aripin N.
;
Fisal N.
;
Rashid R.A.
;
35092180800
;
16021700100
;
15021455100
The demand of quality of service (QoS) for multimedia transmission over wireless network raises huge challenges such as time-varying channel conditions, limited resources, tight delay constraints, high bandwidth demand and complex protocol design. Layered design is proven to perform well in wired networks. However, doing so is not suitable in wireless networks due to the dynamics in wireless medium. On top of that, sensing activity should also be considered explicitly in cognitive UWB network to avoid interference with the primary users. In this paper, a new cross layer design (CLD) approach is proposed to achieve the goal of improving the received video quality while minimizing the packet loss. The proposed CLD consists of sensing module, adaptive resource allocation module and adaptive quantization scale module. Simulation results showed that the proposed CLD reduced the job failure rate (JFR) significantly when compared to the non-CLD approach, basic CLD, PRR based resource allocation (PRR-RA) with queue insensitive and PRR-RA with queue sensitive-fixed Q-value. � 2011 IEEE.
2
Cultural learning in virtual heritage: An overview
(2011)
Ibrahim N.
;
Mohamad Ali N.
;
Mohd Yatim N.F.
;
9337335600
;
7202342102
;
37041416100
The aim of this paper is to present the overview of cultural learning in virtual heritage. In the past, works done on virtual heritage were mostly focused on replicating and visualizing heritage objects for presentation using virtual reality. However, accurate and realistic representation of heritage objects is not enough when it comes to cultural learning in virtual environment. This paper attempts to identify issues that impede cultural learning in virtual environment. In order to develop a virtual environment that is able to facilitate cultural learning, we argue that there is a need to understand what the end users really want to know when it comes to learning culture. We propose a thorough user study to be carried out at the beginning of virtual heritage project development and discuss the outline of our intended approach. � 2011 Springer-Verlag.
2
Current control loop of 3-phase grid-connected inverter
(Institute of Physics Publishing, 2013)
Jabbar A.F.
;
Mansor M.
;
57190137793
;
6701749037
This paper presents a comparative study of current control loop in 3-phase inverter which is used to control the active and reactive output power. Generally, current control loop, power control loop and phase lock-loop are the conventional parameters that can be found in an inverter system controlled by the conventional linear control type, for instance proportional (P), integral (I) and derivative (D). If the grid remains stable throughout the day, PID control can be use. However variation of magnitude, frequency, voltage dips, transient, and other related power quality issues occur in a 3-phase grid often affects the control loop. This paper aims to provide an overall review on the available current control techniques used in grid connected system. � Published under licence by IOP Publishing Ltd.
4
Current practice, problems and factors in COSD application a component users perspective
(2009)
Aris H.
;
Salleh F.H.M.
;
Ibrahim Z.
;
Salim S.S.
;
13608397500
;
26423229000
;
7005685706
;
35616575900
Motivated by the absence of information on the status of component-oriented software development (COSD) application in Malaysia, a study was carried out to investigate the current state of COSD application amongst the software developers. The required information was obtained from the questionnaires distributed to the software developers working at various software development companies in Malaysia. The software developers are broadly categorised into component users and non-component users, where the former use components in their software development and the latter do not. In this paper, information on the component users' practice and the problems that they face in applying COSD is presented. Factors affecting the application of COSD are also included. Information on the current practice shows that the prospect of component users to continue using COSD is high and the room for improvement is wide. Therefore, a list of possible research areas were identified from the problems and factors gathered. The list of research areas, which is arranged in the order of influence, can serve as a basis for researchers to determine a COSD research area to be pursued. � 2009 IEEE.
8
Customized ping tool for smart grid communication network testing
(IEEE Computer Society, 2012)
Quang D.N.
;
See O.H.
;
Nga D.V.
;
Chee L.L.
;
Xuen C.Y.
;
Karuppiah S.A.L.
;
Fadzil M.
;
55758940800
;
16023044400
;
55758222300
;
55759046300
;
55758013600
;
55758814800
;
57193198559
Heterogeneous and hybrid smart grid communication network is a network that comprises of different communication mediums and technologies. Performance evaluation is one of the main concerns in smart grid communication system. In any smart grid communication implementation, to determine the performance factor of the network, a testing of an end-to-end process flow is required. Therefore, an effective testing tool plays a crucial role in evaluating the performance of smart grid communications. Ping is currently one of the most widely used tools. In this paper, a customized ping utility, called Smart Grid Ping, is introduced. This utility provides random ping intervals with user selectable distribution, allowing network administrators to test the reachability and availability of various applications in smart grid communication system. � 2012 IEEE.
4
Date time stamping with digital signature infrastructure
(Institute of Electrical and Electronics Engineers Inc., 2002)
Jamaluddin M.N.
;
Jamaludin M.Z.
;
Din N.Md.
;
Said N.H.M.
;
57189519126
;
57216839721
;
9335429400
;
57189518697
Electronic commerce could be the domain way of making business in the near future. The growing dependence on internet services could be seen by the launching of new products by IT companies to facilitate e-economy or e-business. The security of transactions performed on the internet need to be address seriously to avoid malicious and unwanted internet fraudulent activities which could hinder the growth of internet commerce. Digital certificates are part of a Public Key Infrastructure (PKI) scheme, which is an enabling technology for building a trusted environment. PKI comprised of policies and procedures for establishing a secure method for exchanging information over a network environment. The Digital Signature Act 1997 (DSA 1997) facilitates the PKI implementation in Malaysia. Following the DSA 1997, Certification Authorities (CAS) were set up in Malaysia. Incorporating time and date stamping capabilities in digital signature implementations are required to prove at a later that the transactions existed at the stipulated date and time.[1] This paper describes effort on developing time and date stamping capabilities in a digital signature infrastructure. A digital signature generator with date time stamping has been developed to ensure a safe and trusted environment for e-business transactions. The trusted environment will ensure that only the people with a digital certificate are allowed to performed transactions with the applications. � 2002 IEEE.
3
A decomposition/aggregation method for solving electrical power dispatch problems
(2012)
Mansor M.H.
;
Irving M.R.
;
Taylor G.A.
;
56372667100
;
56217310700
;
55568974100
This paper presents a new approach to solving the Economic Dispatch (ED) Problem for a large number of generators using a decomposition / aggregation method. A program has been developed to demonstrate the algorithm using the MATLAB programming language. A 5-bus test system and the IEEE 26-bus test system are used as demonstration systems. Each test system is decomposed into small areas and each area has been solved for Economic Dispatch (locally) using an Evolutionary Programming (EP) technique. It was ensured that each area contains at least one generating unit and one supplied load. The EP will minimise the objective funtion for each area, minimising the local operating cost including the effects of real power losses in each area. The optimisation problem for each area can be regarded as a sub-problem of the decomposition scheme. Subsequently, the solutions from the areas are combined (aggregated) to solve the overall system problem. The results obtained using the decomposition / aggregation method are compared with the results found when the ED Problem was solved using a centralised EP approach and the base-case results found from solving a (non-optimal) load flow. It was found that applying the aggregation method is a prospective approach for solving economic dispatch problems with a large numbers of generators in a power system. � 2012 IEEE.
1
Delivering e-learning contents through mobile technology: UNITEN case study
(2010)
Mohamed Zabil M.H.
;
Mohd Yusoff M.Z.
;
Yusof A.
;
35185866500
;
22636590200
;
35185858900
E-learning had become more affordable with a cheaper but faster Internet connection. This has encouraged more applications beyond conventional e-learning technique including mobile learning. This paper presents a working prototype of SMS-based mobile learning system which allows interactive learning contents be delivered and disseminated to students using mobile phone application was developed at University Tenaga Nasional (UNITEN). Challenges and issues related to the deployment of SMS-based application are also discussed.
7
Demand side management of variable speed wind turbine power generation systems
(Newswood Limited, 2012)
Baig M.A.
;
Jidin R.
;
Zaheeruddin
;
57209546300
;
6508169028
;
57211610121
Due to high cost of fossil fuel, increase in demand, and environmental issues, Renewable energy is becoming integral part of power generation systems. Among many renewable energy sources, Wind is easily available anywhere in the world. However, due to fluctuating nature of wind, electric power, acquired by wind, has variations in frequency and well as voltage. This paper presents Smart Building Power Control System (SBPCS) to control the variations in voltage and frequency and to manage the load when there is change in supply. � 2012 Newswood Limited. All rights reserved.
4

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