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IEEE International Conference on Systems, Man and Cybernetics

作者： J. C. Patra W. C. Chin P. K. Meher G. Chakraborty School of Computer Engineering Nanyang Technological University Singapore Faculty of Software and Information Science Iwate Prefectural University Japan

In this paper, we present the result of our study on the application of artificial neural networks (ANNs) for adaptive channel equalization in a digital communication system using 4-quadrature amplitude modulation (QAM) signal constellation. We propose a novel single-layer Legendre functional-link ANN (L-FLANN) by using Legendre polynomials to expand the input space into a higher dimension. A performance comparison was carried out with extensive computer simulations between different ANN-based equalizers, such as, radial basis function (RBF), Chebyshev neural network (ChNN) and the proposed L-FLANN along with a linear least mean square (LMS) finite impulse response (FIR) adaptive filter-based equalizer. The performance indicators include the mean square error (MSE), bit error rate (BER), and computational complexities of the different architectures as well as the eye patterns of the various equalizers. It is shown that the L-FLANN exhibited excellent results in terms of the MSE, BER and the computational complexity of the networks.

关键词： Wireless communication Bit error rate Artificial neural networks Computational complexity Adaptive systems Adaptive equalizers Digital communication Amplitude modulation Quadrature amplitude modulation Constellation diagram

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Development of intelligent sensors using Legendre functional-link artificial neural networks

Development of intelligent sensors using Legendre functional...

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IEEE International Conference on Systems, Man and Cybernetics

作者： J. C. Patra P. K. Meher G. Chakraborty School of Computer Engineering Nanyang Technological University Singapore Faculty of Software and Information Science Iwate Prefectural University Japan

Different types of sensors are used to control and monitor complex systems in many applications, where the environmental parameters, e.g., temperature, humidity, etc., undergo large variations. In such conditions, the sensor's output may be erroneous and the system being controlled may malfunction. The need of intelligent sensors arise in such situations. These sensors should be capable of compensating for the adverse effects of the environmental conditions on the sensor output and linearization of sensor response, in order to provide correct readout. In this paper, we propose a novel computationally efficient Legendre functional-link artificial neural network (L-FLANN) to develop a smart sensor that can compensate for the adverse effects of the environmental conditions. By taking two types of environmental models and a pressure sensor, we have shown with extensive computer simulations that the proposed smart sensor is computationally efficient with respect to a multi-layer perceptron (MLP)-based sensor model and capable of satisfactory linearization of sensor output. This smart sensor produces only plusmn0.5% full-scale error between the actual and estimated output for the two selected environmental models under a temperature variation of -50 to 200degC.

关键词： Intelligent sensors Artificial neural networks Temperature sensors Control systems Sensor systems and applications Humidity control Temperature control Condition monitoring computer networks computer simulation

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Assessing object-oriented programming skills in the core education of computer science and information technology: Introducing new possible approach

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WSEAS Transactions on computers 2008年第9期7卷 1427-1436页

作者： Khamis, Norazlina Idris, Sufian Ahmad, Rodina Idris, Norisma Department of Software Engineering Faculty of Computer Science and Information Technology University of Malaya 50603 Kuala Lumpur Malaysia Department of Computer Science Faculty of Technology and Information Science Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia Department of Artificial Intelligence Faculty of Computer Science and Information Technology University of Malaya 50603 Kuala Lumpur Malaysia

Deciding on how to evaluate each students programming skills is one of the largest challenges facing educators who teach object-oriented courses. Traditional assessment of programming education is with Grade. Quite often students get good grades in programming but still facing great challenges or have difficulties to take on real programming jobs. This research focus on how we addressed this challenge in object oriented programming course by proposing a new assessment method to assess students' object-oriented programming skills. The process begins by identifying generic object-oriented skills that students should acquired. In this paper we discuss the issues on object-oriented programming assessment and our proposed solution for a new assessment model. This followed by an approach taken in the process of identifying the object-oriented skills using Delphi technique. Delphi technique is a structured multi-step process that uses a group of experts to achieve a consensus opinion. We present the methodology of three Delphi processes to identify object-oriented programming skills. The identified skills will be used to guide both the coverage of student learning assessments and can be used by instructors to identify what topics merit emphasis.

关键词： Object oriented programming

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Privacy-preserving in web services using hippocratic database

Privacy-preserving in web services using hippocratic databas...

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International Symposium on Information Technology, ITSim

作者： Norjihan Abdul Ghani Zailani Mohamed Sidek Department of Information Science Centre for Advanced Software Engineering (CASE) Faculty of Computer Science & Information Technology City Campus University of Malaya Malaysia

Nowadays, the growth of internet has been accompanied by the growth of web services (e.g e-government, e-health, e-commerce). Web services collect data, especially individuals, from users and use them for various purposes. Sometimes, web services need to release the data they own to third parties. Because privacy is an important concern in web services, there are several research efforts have been devoted to address issues related to the development of privacy-preserving data management techniques. In [3], Agrawal et. al. has introduced Hippocratic Database incorporating privacy protection in relational database systems. In this paper, we’ll proposed the use of Hippocratic Database to ensure the privacy in web services. We use a scenario for driving license renewal by Road Transport Department in order to illustrate this.

关键词： Web services Databases Privacy Data privacy High definition video Insurance Organizations

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CoCoME in SOFA

CoCoME in SOFA

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作者： Bureš, Tomáš Decký, Martin Hnetynka, Petr Kofron, Jan Parízek, Pavel Plášil, František Poch, Tomáš Šerý, Ondrej Tuma, Petr Department of Software Engineering Faculty of Mathematics and Physics Charles University Malostranské námestí 25 Prague 1 11800 Czech Republic Institute of Computer Science Academy of Sciences of the Czech Republic Pod Vodárenskou vezí Prague 8 18000 Czech Republic

ISBN: (纸本)3540852883

This chapter presents our solution to the CoCoME assignment that is based on the SOFA 2.0 (software Appliances) hierarchical component model. The solution involves (i) modeling architecture in SOFA meta-model, (ii) speci fication of component behavior via extended behavior protocols, (iii) checking behavior compliance of components, (iv) verification of correspondence be tween selected component Java code and behavior specification, (v) deploy ment to SOFA run-time envi ronment (using connectors that support RMI and JMS), and (vi) modeling of performance and resource usage via layered queue ing networks. We faced sev eral issues during implementation of the CoCoME assignment in SOFA 2.0. Most notably, the architecture was modified in order to improve clarity of the design - in particular, the hierarchical bus was re placed by two separate buses and the Inventory component was restructured. Extended behavior protocols for all the components are based on the provided plain-English use cases, the UML sequence diagrams, and the reference Java implementation (the assignment does not include a complete UML behavior specification e.g. via activity dia grams and state charts). © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Specifications

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How caching queries at client-peers affects the loads of super-peer P2P systems

How caching queries at client-peers affects the loads of sup...

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International Symposium on Information Technology, ITSim

作者： Rozlina Mohamed Christopher D. Buckingham School of Engineering & Applied Science Aston University Birmingham UK Faculty of Computer System & Software Engineering Universiti Malaysia Pahang Kuantan Malaysia

Super-peer P2P systems strike a balance between searching efficiency in centralized P2P systems and the autonomy, load balancing and robustness provided by pure P2P systems. A super-peer is a node in a super-peer P2P system that maintains the central index for the information shared by a set of peers within the same cluster. The central index handles the searching request on behalf of the connecting set of peers and also passes on the request to neighboring super-peers in order to access additional indices and peers. In this paper, we study the behavior of query answering in super-peer P2P systems with the aim of understanding the issues and tradeoffs in designing a scalable super-peer system. We focus on where to post queries in order to retrieve the result and investigate the implications for three different architectures: caching queries at the peer; caching only at the super-peer; and an ordinary P2P system without any caching facilities. We are adopting the existing equation on measuring the network cost for query answering in super-peer systems. In addition, we are adapting the same equation for super-peer system with caching facilities while answering their queries. Using these equations, the cost of query processing for these architectures is compared. The paper discusses the tradeoffs between architectures with respect to caching, highlights the effect of key parameter values on system performance, and ends by considering whether certain knowledge domains are more appropriate for particular architectures.

关键词： Peer to peer computing Query processing Equations Mathematical model Indexes Routing XML

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Mining Top-K Closed Itemsets Using Best-First Search

Mining Top-K Closed Itemsets Using Best-First Search

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International Conference on computer and Information Technology (CIT)

作者： Panida Songram Veera Boonjing Software Systems Engineering Laboratory Department of Mathematics and Computer Science Faculty of Science King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Department of Computer Science Faculty of Informatics Mahasarakham University Maha sarakham Thailand

In this paper, we proposed an efficient algorithm, TOPK_CLOSED, for mining top-k closed itemsets. This algorithm mines top-k closed itemsets using best-first search. The closed itemsets with the highest supports are firstly found from this algorithm. Consequently, the method quickly finds top-k closed itemsets, which leads to an efficient pruning unnecessary itemsets and stop mining rapidly. In addition, this algorithm can generate closed itemsets without keeping candidates in main memory.

关键词： Itemsets Generators Data mining Pediatrics Complexity theory Algorithm design and analysis Databases

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Robust Scheduling and Runtime Adaptation of Multi-agent Plan Execution

Robust Scheduling and Runtime Adaptation of Multi-agent Plan...

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Mingzhong Wang Kotagiri Ramamohanarao Jinjun Chen Department of Computer Science and Software Engineering University of Melbourne VIC Australia Faculty of ICT Swinburne University of Technology VIC Australia

Robustness and reliability with respect to the successful completion of a schedule are crucial requirements for scheduling in multi-agent systems because agent autonomy makes execution environments dynamic and nondeterministic. We introduce a model to incorporate trust which indicates the probability that an agent will comply with its commitments into scheduling, thus improving the predictability and stability of the schedule. To deal with exceptions during execution, we adapt and evolve the schedule at runtime by interleaving the processes of evaluation, scheduling, execution and monitoring in the life cycle of a plan. Experiments show that schedules maximizing participantspsila trust are more likely to survive and succeed in open and dynamic environments. The results also prove that the proposed plan evaluation approach conforms with the simulation result, thus being helpful for plan selection.

关键词： Robustness Runtime Costs Dynamic scheduling Processor scheduling Intelligent agent Australia Multiagent systems Interleaved codes Monitoring

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Graphical Password: Prototype Usability Survey

Graphical Password: Prototype Usability Survey

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International Conference on Advanced computer Theory and engineering, ICACTE

作者： Ali Mohamed Eljetlawi Norafida Ithnin Faculty of Computer Science and Information Systems Centre for Advanced Software Engineering (CASE) Universiti Teknologi Malaysia Kuala Lumpur Malaysia Faculty of Computer Science and Information Systems Universiti Teknologi Malaysia Skudai Johor Malaysia

Access to computer networks and systems is most often based on the use of conventional passwords nowadays. However, users have difficulty remembering a password that is long and random-appearing. So, they create short, simple, and insecure passwords. Graphical passwords have been designed to try to make passwords more memorable and easier for people to use, to create and, therefore, more usable and secure. Using a graphical password, users click on images rather than type conventional passwords. We have designed a usable graphical password system focusing in the usability features to the users, called Jetafida. In this paper we describe the Jetafida usability features, and the system usability features had been tested by questionnaire survey. This done by thirty computer students participates and uses the system for three times in different times to see the usability features achieved in the system. Where these features are ease of use, ease to create, ease to memorize, ease to learn and the overall system design and layout. The results show that the participants found that the proposed usable graphical password system has been achieving the usability features built in.

关键词： Prototypes Usability computer networks System testing Authentication Humans computer science Information systems Security Interference

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A review on the component evaluation approaches to support software reuse

A review on the component evaluation approaches to support s...

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International Symposium on Information Technology, ITSim

作者： Suryani Ismail Wan M.N. Wan-Kadir Yazid M. Saman Siti Z. Mohd-Hashim Computer Science Department Universiti Malaysia TerEngganu Kuala Terengganu Malaysia Software Engineering Department Faculty of Computer Science ' Information Systems Universiti Teknologi Malaysia Skudai Johor Malaysia

Component-based software engineering (CBSE) is becoming popular due to the benefits of software reuse and the availability of many alternatives of reusable components. By reusing existing software components that have already been tested, software engineers may reduce errors and shorten the time to market the system under development. However, software engineers still have a problem in selecting the existing reusable components as well as difficulties in determining the quality of the developed components for future reuse. Therefore, an appropriate component evaluation framework is extremely needed to harvest the full benefits of software reuse. In this paper, we present the comparative evaluation of the state-of-the-art component evaluation approaches with an emphasize on reusability. The results presented in this paper are very useful in achieving the ultimate aim of our research i.e. providing a holistic component evaluation approach that may assist software engineer both in the selection of the existing reusable components and the development of new reusable components.

关键词： software software engineering Book reviews Availability Reliability Programming Usability

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