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International Conference on Computational Intelligence, Modelling and Simulation (CSSIM)

作者： A.S.H. Basari A.S.M. Jaya M.R. Muhamad M.N.A. Rahman S.Z.M. Hashim H. Haron Faculty of Information & Communication Technology Universiti Teknikal Malaysia Melaka Durian Tunggal Malacca Malaysia Soft Computing Research Group (SCRG) Faculty of Computer Sciences & Information System Universiti Teknologi Malaysia Skudai Johor Malaysia Centre of Graduate Studies Universiti Teknikal Malaysia Melaka Durian Tunggal Malacca Malaysia Faculty of Manufacturing Engineering Universiti Teknikal Malaysia Melaka Durian Tunggal Malacca Malaysia

In this paper, a new approach in predicting the flank wear of Titanium Aluminum Nitrite (TiAlN) coatings using Adaptive Network Based Fuzzy Inference system (ANFIS) is implemented. TiAlN coated cutting tool is widely used in machining due to its excellent resistance to wear. The TiAlN coatings were formed using Physical Vapor Deposition (PVD) magnetron sputtering process. The substrate sputtering power, bias voltage and temperature were selected as the input parameters and the flank wear as an output of the process. A statistical design of experiment called Response Surface Methodology (RSM) was used in collecting optimized data. The ANFIS model was trained using the limited experimental data. The triangular, trapezoidal, bell and Gaussian shapes of membership functions were used for inputs as well as output. The results of ANFIS model were validated with the testing data and compared with fuzzy rule-based and RSM flank wear models in terms of the root mean square error (RMSE), co-efficient determination (R2) and model accuracy (A). The result indicated that the ANFIS model using three bell shapes membership function obtained better result compared to the fuzzy and RSM flank wear models. The result also indicated that the ANFIS model could predict the output response in high prediction accuracy even using limited training data.

关键词： Coatings Predictive models Cutting tools Substrates Data models Accuracy Training

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Rough set approach for attributes selection of traditional malay musical instruments sounds classification1

International Journal of Database Theory and Application

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International Journal of Database Theory and Application 2011年第3期4卷 59-76页

作者： Senan, Norhalina Ibrahim, Rosziati Nawi, Nazri Mohd Yanto, Iwan Tri Riyadi Herawan, Tutut Faculty of Computer Science and Information Technology Universiti Tun Hussein Onn Malaysia Parit Raja 86400 Batu Pahat Johor Malaysia Department of Mathematics Universitas Ahmad Dahlan Yogyakarta Indonesia Jalan Prof. Dr. Soepomo Janturan Yogyakarta Indonesia Facultyof Computer System and Software Engineering Universiti Malaysia Pahang Lebuh Raya Tun Razak 26300 Gambang Kuantan Pahang Malaysia

Feature selection has become very vital aspect in musical instruments sounds for handling the problem of 'curse of dimensionality'. Various feature selection techniques have been applied in this domain focusing on Western musical instruments sounds. However, study on feature selection using rough sets of non-Western musical instruments sounds including Malay Traditional musical instruments is inadequate and still needs an intensive research. Thus, in this paper, an alternative feature selection technique using rough set theory based on Maximum Degree of dependency of Attributes (MDA) technique for Traditional Malay musical instruments sounds is proposed. The modeling process comprises eight phases: data acquisition, sound editing, data representation, feature extraction, data discretization, data cleansing, feature selection using proposed technique and feature validation via classification. The results show that the performance of the best 17 selected features is increase up to 99.82% and 98.03% with 1-NN and PART classifiers respectively. © Springer-Verlag (2010).

关键词： Rough set theory

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Self-localization of swarm robots based on voice signal acquisition

Self-localization of swarm robots based on voice signal acqu...

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International Conference on computer and Communication Engineering, ICCCE'10

作者： Arvin, Farshad Doraisamy, Shyamala Samsudin, Khairulmizam Ramli, Abdul Rahman Department of Computer System Engineering Faculty of Engineering Malaysia Department of Multimedia Faculty of Computer Science and Information Technology 43400 UPM Serdang Malaysia

ISBN: (纸本)9781424462346

This paper presents an acoustical signal tracking experiment by swarm mobile robots. Biological swarm is a fascinating behavior of nature which was inspired from social insects' behavior. A mobile robot that is designed as a swarm robotic platform was employed for implementing voice exploration behavior. An additional module was developed to connect to robots for processing given voice signals using the proportional signal strength approach that estimates orientation of sound source using fuzzy logic approach. The voice processor module utilizes four condenser microphones with around -47db sensitivity which are placed in different directions of the circuit board for capturing surrounding sound signals. Captured samples by microphones are processed to estimate the relative positions of the sound source in the robotic environment. After estimating the position of the signal's source, all participants move towards similar to the insects' colony. The participant robots have an individual task for the estimation of source location from captured samples. Moreover, according to the swarm definition, an additional cooperation between swarm participants is required to achieve a correct colony of robots. Obtained results illustrate the feasibility of the proposed technique and hardware interface for sound signals acquisition with swarm robots. © 2010 IEEE.

关键词： Fuzzy logic

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Botnet detection based on common network behaviors by utilizing Artificial Immune system(AIS)

Botnet detection based on common network behaviors by utiliz...

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2010 2nd International Conference on Software technology and Engineering, ICSTE 2010

作者： Zeidanloo, Hossein Rouhani Hosseinpour, Farhoud Borazjani, Parnian Najafi Faculty of Computer Science and Information System University of Technology Malaysia 54100 Kuala Lumpur Malaysia

ISBN: (纸本)9781424486656

Botnet is most widespread and occurs commonly in today's cyber attacks, resulting in serious threats to our network assets and organization's properties. Botnets are collections of compromised computers (Bots) which are remotely controlled by its originator (BotMaster) under a common Commond-and-Control (C&C) infrastructure. In this paper, we proposed a new general Botnet detection framework. Since Artificial Immune system (AIS) is a new bio-inspired model which is applied for solving various problems in the field of information security, we used this concept in our proposed framework to make it more efficient. Our framework is based on definition of Botnets. Botnet has been defined as a group of bots that perform similar communication and malicious activity patterns within the same Botnet. We utilized AIS to effectively detect malicious activities such as spam and port scanning in bot infected hosts. © 2010 IEEE.

关键词： Botnet

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Web service composition survey: State of the art review

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Recent Patents on computer Science 2010年第2期3卷 91-107页

作者： Al-Shargabi, Bassam Sheikh, Asim El Sabri, Alia Faculty of Information Technology Department of Computer Information System Middle East University for Graduate Studies P.O. Box 42 Amman 11610 Jordan Faculty of Information Systems and Technology Arab Academy for Banking and Financial Sciences Amman Jordan

The Web service composition has received much attention recently to support business-to-business enterprise applications integration. Many composition approaches, languages, platforms, and patents have been proposed to overcome this issue. In this paper we present some of Web service composition languages, platforms, patents, and composition strategies, we compared them to some of the features that must be held by composition process, features such as the dynamic adaptation, execution monitoring, and quality of service (QoS) constraints to satisfy client's requirements to execute Web process. And we give an outlook to essential future research work. Recent patent and research advances aim to find methods for dynamic learning and redesigning along with monitoring and optimization of Web service composition process to satisfy user constraints. © 2010 Bentham Science Publishers Ltd.

关键词： Quality of service

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Reconfigurable Aperture Coupled Planar Antenna Array at 2.3 GHz

Reconfigurable Aperture Coupled Planar Antenna Array at 2.3 ...

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Progress in Electromagnetics Research Symposium

作者： Jamlos, M. F. Rahman, T. A. Kamarudin, M. R. Ali, M. T. Tan, M. N. Md Saad, P. Faculty of Computer and Communication Engineering University of Malaysia Perlis (Unimap) Malaysia Wireless Communication Center (WCC) University of Technology Malaysia (UTM) Malaysia Faculty of Computer Science and Information System (FSKSM) University of Technology Malaysia (UTM) Malaysia

ISBN: (纸本)9781934142127

Reconfigurability in an antenna system is a desired characteristic that has been the focus of much interest in recent years. This paper describes the concept of reconfigurable antenna and how advances in switch technology have made these designs realizable. Complete design of the radiating patches, diode switches and biasing circuitry are also discussed. The structure of modified corporate-feed network is used to realize the array antenna consisting of 16 elements of rectangular patches at 2.3 GHz. The antenna patches through deployment of 4 PIN diodes switches at the feeding lines enabled the radiation pattern to be altered with respect to the beam shaping characteristics. While the planar arrays design making it more feasible for other antenna performances to be enhanced. The resistance for OFF and ON states of PIN diodes could strongly affect the performance of antenna. Hence, in order to improve the performance of the antenna, aperture coupled configuration is used to boost the antenna gain and directivity. The slot's geometry of aperture coupled antenna is stressed out as it determines the amount of coupling to the patches from feeding lines of the antenna. It is shown through simulations and measurements that 4 types of radiation pattern of the antenna can be well reconfigured by turning the diode switches on and off. The gain, directivity, beamwidth, efficiency and return loss are also changed. The proposed antenna, aperture coupled microstrip antenna array with quadratic slots, Q-ACMAA strengthen the level of coupling to the patches from feeding line with almost 50% of efficiency. Good agreement between the simulations and measurements were obtained. These results extend the validity of the analysis and will be useful for applications involving this type of reconfigurable antenna.

关键词： Microstrip antennas

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Using CAPTCHAs to mitigate the VoIP spam problem

Using CAPTCHAs to mitigate the VoIP spam problem

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2nd International Conference on computer Research and Development, ICCRD 2010

作者： Ahmedy, Ismail Portmann, Marius Department of Computer System and Communication Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia School of Information Technology and Electrical Engineering University of Queensland Queensland Australia

ISBN: (纸本)9780769540436

Voice over Internet Protocol (VoIP) is one of the emerging technologies today. This application offers the user a service by which one can call another person at a low cost as compare with traditional phone services. One drawback to the Internet is spam, which are unsolicited or unwanted objects which often appear as unwanted messages in various email applications. For VoIP, spam refers to unsolicited and unwanted calls by the VoIP user. In this paper, we have purposed a solution to prevent the spam in VoIP. The CAPTCHA (Completely Automated Public Turing Test to Tell computers and Human Apart) method aims to determine whether the call is coming from a human or a machine. The key contribution of this paper is a proof-of-concept implementation of a CAPTCHA mechanism to prevent VoIP Spam. © 2010 IEEE.

关键词： Electronic mail filters

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Evaluating 3D position and velocity of subject in parabolic flight experiment by use of the binocular stereo vision measurement

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Chinese Optics Letters 2010年第6期8卷 601-605页

作者：金涛贾宏志侯文玫 Ryo Yamamoto Norihiro Nagai Yusaku Fujii Koichi Maru Naoya Ohta Kazuhito Shimada Shanghai Key Laboratory of Modern Optical System School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology Department of Electronic Engineering Faculty of EngineeringGunma University Department of Computer Science Faculty of EngineeringGunma University Medical Operations Japan Aerospace Exploration Agency(JAXA)JAXA Houston OfficeHouston 77058USA

A practical method for evaluating the three-dimensional（3D） position and velocity of a moving object used in the parabolic flight experiment is developed by using the binocular stereo vision measurement theory. The camera calibration mathematic model without considering the lens distortion is *** direct linear transformation（DLT） algorithm is improved to accomplish the camera *** camera calibration result and optimization algorithm are used to calculate the object＇s world coordinate from image *** 3D position and the velocity of the moving object are *** standard uncertainty in estimating the velocity is 0.0024 m/s,which corresponds to 1%level of the velocity of the object in the *** results show that this method is very useful for the parabolic flight experiments.

关键词： Binoculars Calibration Cameras Experiments Linear transformations Measurement theory Three dimensional Uncertainty analysis Velocity

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Iris boundary detection using a novel algorithm

Iris boundary detection using a novel algorithm

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作者： Shamsi, Mahboubeh Saad, Puteh Bt Ibrahim, Subariah Bt Rasouli, Abdolreza Faculty of Computer Science and Information System University Technology Malaysia Skudai Johor 81310 Malaysia

ISBN: (纸本)9789604741663

One of the difficult tasks in iris recognition is to detect the boundary between the iris region and the pupil region. This is due to the low texture contrast between them. In order to capture the degree of texture contrast between iris region and pupil region, we propose a novel algorithm that hybrid a difference function with a factor matrix. Experiments show that this algorithm can detect the boundary between iris region and pupil region accurately. Based on this algorithm, the percentage of successful segmentation is 99.34%.

关键词： Functions

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Interrogative knowledge organization and structuring from unstructured documents

Interrogative knowledge organization and structuring from un...

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15th International Business Information Management Association Conference, IBIMA 2010

作者： Sidi, Fatimah Jabar, M.A.Marzanah A. Department of Computer Science Faculty of Computer Science and Information Technology University Putra Malaysia 43400 UPM Serdang Selangor Malaysia Department of Information System Faculty of Computer Science and Information Technology University Putra Malaysia 43400 UPM Serdang Selangor Malaysia

ISBN: (纸本)9780982148945

Knowledge in unstructured documents lacks on the characteristics of structuring, therefore arise difficulty to impose queried in simple ways in it. This paper presents interrogative knowledge organization and structuring to be imposed in order to capitalize knowledge resides in unstructured documents. An experimental approach is done using an appropriate test collection of unstructured documents. The results produced are measured using quantitative retrieval performance of recall and precision metrics. This is to allow querying by using database standard Data Manipulation Language in addition to increase understanding by humans on the knowledge available in the unstructured document.

关键词： Knowledge organization

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