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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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A LOCAL DYNAMIC CLUSTER SELF-ORGANIZATION ALGORITHM IN WIRELESS SENSOR NETWORKS FOR RAINFALL MONITORING

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Journal of Electronics(China) 2010年第2期27卷 279-288页

作者： Wang Huibin Xu Lizhong Xiao Xianjian Fan Tanghuai Xu Feng College of Computer ＆ Information Hohai University Nanjing 2100P8 China Institute of Communication ＆ Info System Engineering Hohai University Nanjing 210098 China Department of Computer Science ＆ Technology Nanchang Institute of Technology Nanchang 330099 China

Wireless Sensor Networks for Rainfall Monitoring (RM-WSNs) is a sensor network for the large-scale regional and moving rainfall monitoring,which could be controlled deployment. Delivery delay and cross-cluster calculation leads to information inaccuracy by the existing dynamic collabo-rative self-organization algorithm in WSNs. In this letter,a Local Dynamic Cluster Self-organization algorithm (LDCS) is proposed for the large-scale regional and moving target monitoring in RM-WSNs. The algorithm utilizes the resource-rich node in WSNs as the cluster head,which processes target information obtained by sensor nodes in cluster. The cluster head shifts with the target moving in chance and re-groups a new cluster. The target information acquisition is limited in the dynamic cluster,which can reduce information across-clusters transfer delay and improve the real-time of information acquisition. The simulation results show that,LDCS can not only relieve the problem of "too frequent leader switches" in IDSQ,also make full use of the history monitoring information of target and con-tinuous monitoring of sensor nodes that failed in DCS.

关键词： Wireless Sensor Networks (WSNs) Rainfall Monitoring (RM) Self-organization Local dynamic cluster

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Defending denial of service attacks against domain name system with machine learning techniques

IAENG International Journal of Computer Science

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IAENG International Journal of computer Science 2010年第4期37卷

作者： Rastegari, Samaneh Iqbal Saripan, M. Rasid, Mohd Fadlee A. Department of Computer and Communication System Engineering Universiti Putra Malaysia 43400 Serdang Selangor Malaysia

Along with the explosive growth of the Internet, the demand for efficient and secure Internet Infrastructure has been increasing. For the entire chain of Internet connectivity the Domain Name system (DNS) provides name to address mapping services. Hackers exploit this fact to damage different parts of Internet. This paper focuses on Denial of Service (DoS) attacks as the major security issue during recent years. The process of detection and classification of DoS against DNS has been presented in two phases in our model. The proposed system architecture consists of a statistical pre-processor and a machine learning engine. Three different types of neural network classifiers and support vector machines are evaluated as the engine in a simulated network. The performance of our system was measured in terms of detection rate, accuracy, and false alarm rate. The results indicated that a back propagation neural network provides a 99% accuracy and an acceptable false alarm rate of 0.28% comparing to other types of classifiers.

关键词： Network security

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Investigation of electrical potential and electromagnetic field for overhead high voltage power lines in Malaysia

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Journal of Applied Sciences 2010年第22期10卷 2862-2868页

作者： Sahbudin, R.K.Z. Fauzi, S.A. Hitam, S. Mokhtar, M. Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia 43400 Serdang Selangor Malaysia

The exposure of human body to electric field and magnetic field could cause biological effects, including changes in functions of cells and tissues and subtle changes in hormone levels, which may or may not be harmful. The aim of this study was to analyze and compute the amount of electrical potential, electric field and magnetic flux density at a certain point and distance from the overhead high voltage power lines of 132 and 275 kV in Malaysia. An analytical calculus method is proposed in order to accomplish this study. The models of the power lines were constructed using the actual physical dimensions of the towers. The results show that the exposure levels of the electromagnetic fields to the public is low if they stay more than 30 m away from the power lines. For the live-line worker, the exposure to the high electric and magnetic field could endanger their body if they stay too close to the conductor. The evaluations of the electrical potential, electric field strength and magnetic flux density are done using the Matlab environment. Matlab's Graphical User Interface (GUI) techniques are developed as an easy and user-friendly tool to be used. © 2010 Asian Network for Scientific Information.

关键词： Magnetic flux

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The S.H.E.L.L. project: A Secure Habitat for an Enhanced Long Living - Design, implementation and guidelines for a new concept of people assistance

The S.H.E.L.L. project: A Secure Habitat for an Enhanced Lon...

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2010 3rd International Symposium on Applied Sciences in Biomedical and communication Technologies, ISABEL 2010

作者： Mastrogiovanni, Fulvio Bagnasco, Andrea Allasia, Giorgio Giuni, Antonella Dept. of Computer Communication and System Sciences University of Genova Genoa Italy Department of Biophysical and Electronics Engineering University of Genoa Genoa Italy FOS Srl Genoa Italy Genova Robot Srl Genoa Italy

ISBN: (纸本)9781424481323

The SHELL project aims at implementing state of art technologies in the domains of Wireless Sensor Networks, Ambient Intelligence, Context Awareness, Automated Learning, in order to design a new concept for assisting people affected by mental diseases or living alone. The goal to achieve is a modular device kit system, easy to deploy and to use, which will be able to learn to peculiar habits of the people under monitoring in order to improve the level of automatic alarms. ©2010 IEEE.

关键词： Wireless sensor networks

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Heart sound musical transcription technique using multi-level preparation

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International Review on computers and Software 2010年第6期5卷 595-600页

作者： Arvin, Farshad Doraisamy, Shyamala Department of Computer and Communication System Engineering University of Putra Malaysia Malaysia Malaysia Imperial College London United Kingdom

Musical transcription of heart sound is a new idea to provide a textual biomedical database. Textual database allows applying several indexing and searching techniques in order to monitor patient behavior for a long duration. MIDI commands produce a semi-structural musical file format which enables to apply various applications. Main objective of this paper is the extraction of fundamental frequency of the given heart sound which is recorded with an electrical stethoscope. Based on extracted fundamental frequencies, the logarithmical relationship of pitch numbers will be estimated. Generally the captured heart sound includes several types of noises such as other organs sound and ambient voice. Hence, filtering of the heart sound is indispensable. Thus, three levels of preparation techniques which are wavelet transform, frequency limitation, and amplitude reconstruction will be applied on the heart sound sequentially. The results of the performed experiments show the accuracy of approximately 93% ±2. The statistical analyses illustrated that each level of the preparation, significantly improved the accuracy of the transcription (p

关键词： Transcription

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A novel relaying protocol in a cooperative network with decode-and-forward relays

A novel relaying protocol in a cooperative network with deco...

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International Conference on Electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

作者： Sara Efazati Paeiz Azmi Communication System Laboratory(CSL) Department of Electrical and Computer Engineering Tarbiat Moalem University Iran

ISBN: (纸本)9781424456062;9789746724913

Cooperative diversity techniques make a reduction in spectral efficiency despite of an increase in reliability. In this paper we propose a novel relaying protocol in a cooperative network with decode and forward (DF) relays to improve the spectral efficiency in addition to achieving full diversity order (maximum available reliability). The proposed protocol keeps the transmission rate fixed to the rate of point-to-point transmission and outperforms rather than conventional relaying protocols such as fixed, selection and incremental relaying protocols. The simulation results show the effectiveness of our method and confirm our claim.

关键词： Protocols Decoding Digital relays Detectors Transmitting antennas Maximum likelihood detection Feedback Fading Wireless communication Performance gain

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Coordinated micro-generation and load management for energy saving policies

Coordinated micro-generation and load management for energy ...

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IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe)

作者： S. Bertolini M. Giacomini S. Grillo S. Massucco F. Silvestro Department of Communication Computer and System Sciences University of Genoa Italy Electrical Engineering Department University of Genoa Italy

The paper describes a joint university-industry project aimed at defining hardware and software requirements for the development of a prototypical microgrid platform on existing sites able to manage generation resources and load. The paper describes an architecture developed for integrating existing software tools for on-line load monitoring and control and for management of in-site generation. The system acquires data from field and stores information on a server, from which an optimization tool gets data in order to perform its calculations and give the optimal set points to the programmable generation resources. Results are reported about experimentation at test sites with different generating units, such as cogeneration of heat and power (CHP) and/or renewable power generating units equipped with a real-time monitoring tool.

关键词： Optimization Monitoring Generators computer architecture Cogeneration Energy consumption Sensors

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WebPIPA （Web Based Paddy Irrigation Productivity Assessment）： An Online Irrigation Water Supply Management for Tanjung Karang Rice Irrigation Scheme （TAKRIS）

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Journal of Agricultural Science and Technology 2010年第5期4卷 87-94页

作者： T. J. Deepak M. S. M. Amin Rashid Shariff Rahman Ramli Department of Biological ＆ Agricultural Engineering Universiti Putra Malaysia Serdang 43400 Malaysia Department of Computer ＆ Communication System Universiti Putra Malaysia Serdang 43400 Malaysia

Irrigation water management has significant economic implications in developing countries like Malaysia. As in many countries, Malaysia is also espousing internet as a platform of new possibilities for information access and sharing. Thus web based decision tools are pertinent in managing water, which is becoming a source of conflict between domestic, industry and agricultural use in this emerging technological and information age. Decision Support system （DSS） created in the past was theoretically acceptable but practically not effective in the transfer of scientific knowledge from research labs to the end-users to support them in decision making. The Web Based Paddy Irrigation Productivity Assessment （WebPIPA） is an example of DSS created to provide an effective conduit for the transfer of scientific knowledge from research labs to the end-users to support them in decision making. WebPIPA serves as an innovative, user friendly and efficient management tool for run-of-river rice irrigation system. It is a web based program that requires users to login through user name and password WebPIPA is developed using Net framework and ASP. Net Programming Languages of Microsoft. Net 2003 environment. A 3-tier architecture framework was carefully studied and was implemented to create the WebP1PA model. Mathematical model developed for aiding irrigation decisions must be oriented towards addressing various issues in addition to the scientific ones for better acceptability. All government and private agencies, researchers, station users, farmers, investors and buyers related to this study area will be able to access and share the database through the internet. By strengthening the involvement of government departments, the database can be very effectively used by all stakeholders at the same time narrowing the gap between the urban and rural communities in the development of country.

关键词： WebPIPA （Web Based Paddy Irrigation Productivity Assessment） Internet rice granary DSS （Decision Supportsystem）.

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Packet analysis using packet filtering and traffic monitoring techniques

Packet analysis using packet filtering and traffic monitorin...

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IEEE Conference on Open systems

作者： Haris, S.H.C. Ahmad, R.B. Ghani, M.A.H.A. Waleed, Ghossoon M. School of Computer and Communication Engineering Universiti Malaysia Perlis d/a Pejabat Pos Besar 01000 Kangar Perlis Malaysia Department of Management Information System College of Administrative Applied Science University P.O.Box: 5055 Manama Bahrain

ISBN: (纸本)9781424490554

Malicious attackers intended to annihilate the availability of network server with threats such as Transmission Control Protocol (TCP) Synchronized (SYN) Flood. The attackers usually make the server exhausted and unavailable in order to complete the TCP three-way handshake mechanism. Detecting TCP SYN Flood in the Hypertext Transfer Protocol (HTTP) is the main problem in this paper. Anomaly detection is used to detect TCP SYN flood attack focusing in payload and unusable area. The unusual three-way handshake mechanism is also being analyzed. The results show that the proposed detection method using the combination of packet filtering and traffic monitoring can detect TCP SYN Flood in the network. © 2010 IEEE.

关键词： HTTP

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