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International Conference on Space Science and Communication (IconSpace)

作者： Mohamad Syuhaimi Ab-Rahman Mohamad Najib Mohamad Saupe Aswir Premadi Kasmiran Jumari Spectrum Technology Division Computer and Network Security Group Department of Electrical Electronic and System Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

In this paper, we presented the embedded Ethernet microcontroller for optical monitoring. This design is used for fiber monitoring in the FTTH system. The embedded Ethernet microcontroller is used to control the 1x8 optical switches where this switch is to reroute the optical signal in the FTTH system. These systems consisting of two primaries part communicating each other: (i) A server consisting of a microcontroller PIC18F97J60 with built-in embedded Ethernet controller module and (ii) a client computer. In this system, a microcontroller system is act like web server that store the web pages in their memory, a client computer can access this web page using web browser to monitor and control the microcontroller where the microcontroller is used to control the path of the optical signal by using optical switch.

关键词： Ethernet networks Microcontrollers Monitoring Control systems Optical control Optical switches Optical fiber subscriber loops Web pages Embedded computing Web server

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Analysis of the different wireless transmission technologies in Distributed Measurement systems

Analysis of the different wireless transmission technologies...

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IEEE International Workshop on Intelligent Data Acquisition and Advanced Computing systems: technology and Applications

作者： L. Skrzypczak D. Grimaldi R. Rak Department of Electronics Computer and System Sciences University of Calabria Cosenza Italy Institute of the Theory of Electrical Engineering Information and Measurement Systems Electrical Engineering Faculty Warsaw University of Technology Warsaw Poland

In order to make modern measurement systems more flexible, faster and easier to configure and use, the implementation of wireless technology is needed into the Distributed Measurement system (DMS). There is a number of wireless standards available on the market, each one with unique characteristics. The paper is an attempt at categorizing different wireless standards to meet specific requirements of the DMSs. Innovative system architectures making use of modern microcontrollers and multiple wireless transmission standards were taken into account. In order to analyze the characteristics different wireless transmission standard (such as ZigBee and SimpliciTI.) in the operating condition available into the wireless DMS, experimental tests were devoted. The information obtained from theses experimental tests are used to develop a new design approach of the wireless connection into the DMS to integrate different standards and to achieve best transmission properties.

关键词： Instruments Electric variables measurement Microcontrollers ZigBee Wireless sensor networks Distributed computing Testing Communication cables Intelligent sensors Conferences

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Developing conceptual view of schema mapping on date format for healthcare data warehousing

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World Academy of Science, Engineering and technology 2009年 38卷 211-214页

作者： Ramli, Fatihah Othman, Rosita Mohamed Musa, Nadia Natra Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak 94300 Kota Samarahan Sarawak Malaysia Universiti Malaysia Sarawak 94300 Kota Samarahan Sarawak Malaysia Department of Information System Universiti Malaysia Sarawak Sarawak Malaysia Information System Department Universiti Malaysia Sarawak 94300 Kota Samarahan Sarawak Malaysia

Currently, the schema mapping only deals with attribute semantic conflicts but not with the semantics conflicts in actual data. Problem arises when data used are not actual data. Testing activity later cannot produce the best result for data quality. This problem become more difficult when data are extracted from different data sources with different formats are integrated (e.g: date based on UK format (DD/MM/YYYY) and date based on US format (MM/DD/YYYY). Semantic conflict dealing with actual data will be used to solve this problem. This leads to the question of our study: how to design mapping schemes to improve standard date format presentation. A framework will be represented in this study where it provides significant performance improvements in date format presentation. We try to utilize the increasing popularity of eXtensible Markup Language (XML) to provide us with effective query and integration of diverse data such as date presentation. © 2009 ***.

关键词： XML

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Autonomous SPY©: Intelligent Web proxy caching detection using neurocomputing and Particle Swarm Optimization

Autonomous SPY©: Intelligent Web proxy caching detection us...

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International Symposium on Mechatronics and Its Applications, ISMA

作者： Sarina Sulaiman Siti Mariyam Shamsuddin Fadni Forkan Ajith Abraham Soft Computing Research Group Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia Centre for Quantifiable Quality of Service in Communication Systems Norwegian University of Science and Technology Trondheim Norway

The demand for Internet content rose dramatically. Servers became more and more powerful and the bandwidth of end user connections and backbones grew constantly. Nevertheless users often experience poor performance when they access Web sites or download files. Reasons for such problems are often performance problems which occur directly on the servers (e.g. poor performance of server-side applications or during flash crowds), problems concerning the network infrastructure (e.g. long geographical distances, network overloads, etc.) and a surprising fact is that many people tend to access the same piece of information repeatedly. Web caching has been recognized as the effective schemes to alleviate the service bottleneck, minimize the user access latency and reduce the network traffic. Consequently, in this paper we discuss an alternative way to tackle these problems with an implementation of autonomous SPY tool. This tool is capable to self directed either to cache or not to cache the objects in a document based on the behavior of users' activities (number of object hits, script size of objects, and time to receive objects) in Internet based electronic services (e-services) for enhancing Web access.

关键词： Particle swarm optimization Artificial neural networks Network servers Mechatronics Application software Web and internet services Web server Bandwidth Delay Forward contracts

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Distributed state and unknown input estimation for freeway traffic flow models 10

Distributed state and unknown input estimation for freeway t...

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2009 10th European Control Conference, ECC 2009

作者： Luspay, T. Kulcsar, B. Tettamanti, T. Varga, I. Bokor, J. Systems and Control Laboratory Computer and Automation Research Institute HAS Kende u. 13.-17 BudapestH-1111 Hungary Delft Center for System and Control Faculty of Mechanical Maritime and Materials Engineering Technical University of Delft Mekelweg 2 Delft Netherlands Department of Control and Transport Automation Budapest University of Technology and Economics Bertalan L. u. 2 BudapestH-1111 Hungary

ISBN: (纸本)9783952417393

The paper presents a joint state and unmeasured input estimation technique for a special class of nonlinear second order macroscopic traffic model. The freeway traffic system is transformed into a quasi and affine approximate Lin- ear Parameter Varying (LPV) form. Observer design technique is formulated using off-line optimization problem subjected to Linear Matrix Inequality (LMI) conditions, considering uncertain scheduling parameters. Furthermore, locally designed state estimators are interconnected to cover multiple freeway sections. The elaborated method is validated using real traffic measurements. © 2009 EUCA.

关键词： Linear matrix inequalities

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Hybrid Ant system/Priority List Method for Unit Commitment Problem with Operating Constraints

Hybrid Ant System/Priority List Method for Unit Commitment P...

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IEEE International Conference on Industrial technology (ICIT)

作者： K. Withironprasert S. Chusanapiputt D. Nualhong S. Jantarang S. Phoomvuthisarn Department of Electrical Power Engineering Faculty of Engineering Mahanakom University of Technology Bangkok Thailand Department of Computer Engineering and Satellite Research Center Faculty of Engineering Mahanakom University of Technology Bangkok Thailand Electrical Engineering Department Electrical and Control System Engineering Division Electricity Generating Authority of Thailand Bangkok Thailand Center of Excellence in Electrical Power Technology Chulalongkom University Bangkok Thailand

This paper presents a new method to solve unit commitment problem with operating constraints using a hybrid ant system/priority list method (HASP). The proposed methodology employs ant system in cooperating with the priority list method to find unit commitment solution as means of mutually combining the advantages of them in that a flexibility of the priority list method is reinforced, while AS algorithm can gain the benefit of using bias information for improving its performance during search process. The simulation results show that the proposed HASP is capable of obtaining satisfactory solution within reasonable computational time. Moreover, the proposed HASP can be extensively applied to handle the ramp rate limits and the operating reserve constraint, which are important for modern power system operation.

关键词： Transformers Load flow Admittance Mathematical model Power system modeling Medium voltage Mutual coupling Gaussian distribution Convergence Electronic mail

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GSM mobile SMS/MMS using public key infrastructure: M-PKI

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WSEAS Transactions on computers 2008年第8期7卷 1219-1229页

作者： Anuar, Nor Badrul Kuen, Lai Ngan Zakaria, Omar Gani, Abdullah Wahab, Ainuddin Wahid Abdul Department of System and Computer Technology Faculty of Computer Science and Information Technology University of Malaya 50603 Kuala Lumpur Malaysia

Presently, mobile handheld device has successfully replaced traditional telephone to become the most popular wireless communication tools. Mobile Short Message Service (SMS) and Multimedia Message Service (MMS) fulfill almost all the user requirements as an effective communication and information delivering service. Since SMS/MMS become so popular on daily communication, there is a demand to communicate or exchange confidential information in a secure environment. Public Key Infrastructure (PKI) is a proven solution, which using pairing of key, for secure communication encryption. In this paper, m-PKI is introduced to provide PKI encryption to the mobile SMS and MMS. This new approach allows the end-user to send private and classified message via SMS. The key pair generation and distribution are performed by the Certificate Authority (CA). The size of the key pair are studied and decided by the tradeoff between performance and security.

关键词： Public key cryptography

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Development of an automatic polarized microscopic imaging system for asbestos qualitative analysis

Development of an automatic polarized microscopic imaging sy...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Kuniaki Kawabata Yugo Tsubota Hirokazu Yamazaki Taketoshi Mishima Kazuhiro Hotta Hajime Asama Hiroshi Mizoguchi Haruhisa Takahashi Kawabata Intelligent System Research Unit RIKEN Wako Saitama Japan Department of Information and Computer Science Saitama University Japan Department of Information and Communication Engineering University of Electro-Communications Japan RACE University of Tokyo Japan Faculty of Science and Technology Tokyo University of Science Japan

This paper describes about an automated microscopic imaging system for supporting asbestos qualitative analysis. By JIS (Japanese Industrial Standards), the dispersion staining method is designated as a visual qualitative analysis for asbestos in the construction materials. In the analysis process using the microscope, the expert monitors the particles including asbestos fibers and count them. For supporting such observation process, we developed an automated microscopic image collecting system. It realizes to take the images of the target area and store them to the database automatically. In this paper, we introduce and report the prototype system and its performance.

关键词： Microscopy Image analysis Optical fiber polarization Building materials Inspection Dispersion Prototypes Lungs X-ray diffraction Optical imaging

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Adaptive Parallel Model Combination for Reduced Environmental Mismatch in Noisy Speech Recognition

Adaptive Parallel Model Combination for Reduced Environmenta...

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International Conference on Electronic Design

作者： Tan, S. S. Ahmad, Abdul Manan Software Engineering Department Faculty of Computer Science and Information System University of Technology Malaysia Malaysia Speech Laboratory Faculty of Computer Science and Information System University of Technology Malaysia Malaysia

ISBN: (纸本)9781424423149

Due to environmental mismatch, speech recognition systems often exhibit drastic performance degradation in noisy conditions. This paper presents a model-based technique termed Adaptive Parallel Model Combination (APMC) which compensates the initial acoustic models to reduce the discrepancy. APMC used the well-known PMC technique to composite a set of corrupted speech models, while fine tuning the mean parameter of the models using a transformation-based adaptation technique called Maximum Likelihood Spectral Transformation (MLST). Evaluated on a context-independent phone recognition task, APMC was found to be superior to both PMC and MLST, especially in non-stationary noisy conditions. On average, APMC has achieved 48.81% improvement over the initial models, whereas PMC and MLST have improved the accuracy by 34.12% and 35.23% respectively.

关键词： Maximum likelihood

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Considering service strategy in ITIL V3 as a framework for IT governance

Considering service strategy in ITIL V3 as a framework for I...

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International Symposium on Information technology 2008, ITSim

作者： Nabiollahi, Akbar Sahibuddin, Shamsul Bin Faculty of Computer Science and Information System University Technology Malaysia 81310 Skudai Johor Malaysia

ISBN: (纸本)9781424423286

IT governance is the process by which decisions are made around IT investments. A well-matured IT governance framework is based on three major elements: structure, process and communication. In addition, there are four objectives that drives IT governance and must be covered in IT governance processes: IT value and alignment, accountability, performance measurement, and risk management. As we know Information technology Infrastructure Library (ITIL) is a public framework that describes Best Practice in IT service management. Although some researchers have considered ITIL V2 as a part of their IT Governance framework, this paper claims that ITIL V3 (new publication of ITIL in 2007) and "Service Strategy" as the core of this publication, can provide a well-matured framework for the governance of IT by covering all requirement of IT Governance. © 2008 IEEE.

关键词： Risk management

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