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Journal of Information and Communication Technology (JICT) Vol. 5, 2006

ADAPTIVE BATCHING SCHME FOR MULTICAST NEAR VIDEO-ON-DEMAND (NVOD) SYSTEM
*Madhu Jain , **Vidushi Sharma and **Kriti Priya
*Department of Mathematics, Institute of Basic Science
Dr. B.R. Ambedkar University, Agra-282002, India
**Institute of Technology and Science,
Mohan Nagar; Ghaziabad-201005, India
 
ABSTRACT FULL TEXT
Video-on-Demand is becoming most sought after multimedia applications. It is difficult to attain a true video-on-demand (TVOD) system, so near video-on-demand (NVOD) is catching the attention of people. In NVOD, requests are multicast in different streams. Important issue in this system is the choice of batching time. Traditionally the batching time is fixed depending on the number of requests. In this paper we have suggested an adaptive batching scheme (ABS) where batching time is adjusted according to the current arrival rate, which follows the hyper-exponential distribution pattern. A comparison is made between the fixed and adaptive batching schemes. Numerical illustrations are provided to show that adaptive batching policy is better than fixed batching policy for optimizing bandwidth requirements.
 
Keyword: Near Video-on-Demand (NVOD), Bandwidth requirement, Adaptive batching, Multicasting Stream, Hyper-exponential input.
 

 
ALLEVIATION OF STALE INFORMATION IN WEAK CACHE COHERENCE FOR WIRELESS WWW
Nazrul M. Ahmad, **Kim-Geok, Tan, and ***Ali M. Abdelrahman
*Faculty of Information Science & Technology (FIST)
Multimedia University, Jalan. Ayer Keroh Lama, 75450 Melaka, Malaysia
**Faculty of Engineering & Technology (FET)
Multimedia University, Jalan Ayer Keroh Lama, 75450 Melaka, Malaysia
***Faculty of Engineering & Technology
University of Gezira, Wad Medani, Sudan
E-mail: ali_abdelrahman @ yahoo. com
E-mail: nazrul.muhaimin@ mmu. edu.my
E-mail:
kgtan@mnut.edu.my
 
ABSTRACT FULL TEXT
In this paper, we identify the client polling as a cache coherence mechanism that best satisfies the requirements and improves the performance of web services over wireless networks. However, this mechanism suffers from degradation of client satisfaction by potentially sending stale information. Therefore, we propose a conceptual framework, Multilevel Pre-fetching (MLP), to alleviate the stale information forwarded by the web cache to the clients. The MLP is responsible for improving the level of freshness among the cached objects by pre-fetching the most frequently accessed objects.
 
Keywords : Cache Coherence, Pre-fetching, Client Poling, Wireless Networks, Word Wide Web
 

 
A TOOL FOR HEALTHCARE INFORMATION INTEGRATION
Sellappan Palaniappan and Ng Yih Huey
Department of information Technology
Malaysia University of Science and Technology
Kelana Square, 47301 Petaling Jaya, Malaysia
E-mail: {sell, yhng}@must.edu.my
 
ABSTRACT FULL TEXT
Currently, information collected by the various healthcare providers (hospitals and clinics) in Malaysia is not integrated. Each collects information for its own internal use. The information is not aggregated and analyzed at the state or national level to provide useful information for decision making (e.g., by the Ministry of Health). Extracting and aggregating information from diverse data sources (databases) has always been a challenge for the healthcare industry. This paper presents a tool for integrating healthcare information from several relational databases into a single data warehouse. It is simple, cost-effective and yet solves the information integration problem. It consists of a schema mapping process which is partially automated and an Extraction, Transformation and Loading (ETL) process which is fully automated. To demonstrate its viability, a data warehouse containing materialized data is built from three databases, namely, Access, SQL Server and Oracle. It is implemented using the Microsoft .NET Framework.
 
Keywords: Data Warehouse, Healthcare Information Integration, Extraction Transformation and Loading (ETL), Metamodel, Schema Mapping.
 

 
DO TEACHERS HAVE ADEQUATE ICT RESOURCES IN PROMOTING ENGLISH LANGUAGE TEACHING AND LEARNING?
Samuel R.J. and Zaitun A. B.
Faculty of Computer Science and Information Technology
University of Malaya, 50603 Kuala Lumpur
E-mail: robkow@tm.net.my
E-mail:
zab@um.edu.my
 
ABSTRACT FULL TEXT
It is generally acknowledged that the standard of English in Malaysian schools has been deteriorating over the years. This decline must be put right if we are to maintain our competitiveness in the global market. The on-going ICT revolution has dramatically changed the way teachers teach and students learn and the appropriate use of ICT resources can give a tremendous boost to the teaching and learning of English. Traditional classroom teaching ought to be complemented by providing a web-based learning environment. This research is based on the findings of a questionnaire survey conducted over a period of five months (i.e. from 1st September 2004 to 31stJanuary 2005). According to the findings 72.4 % of the respondents say that there is a lack of ICT resources in schools. More recently however, the supply of ICT resources in the schools have increased by leaps and bounds but yet the use of ICT tools in English Language teaching and learning is far from satisfactory. In the concluding part of this article, some obvious obstacles to ICT use in the teaching and learning of English are discussed.
 
Keywords: ICT Resources, ICT integration, interactive lessons, multimedia applications.
 

 
SOFTWARE QUALITY AND CERTIFICATION: PERCEPTION AND PRACTICES IN MALAYSIA
Jamiah Haji Yahaya, **Aziz Deraman, and **Abdul Razak Hamdan
* Faculty of Information Technology,
Northern University of Malaysia, Sintok, 06010, Kedah, Malaysia
Faculty of Information Sciences and Technology,
National University of Malaysia, 43600 Bangi, Selangor, Malaysia
 
ABSTRACT FULL TEXT
Recently, there has been an increasing amount of literature on software quality and at the same time complaints are reported widely on the quality status of software products. In the past few years we see a tremendous growth of companies and agencies involve in software industries not only in Malaysia but also in the entire world. The emergence of Multimedia Super Corridor (MSC) in Malaysia in 1996 was the starting point for the blooming of software and ICT related companies. Despite that, not much attention is given to the quality of the software product that is being developed by various categories of companies. The companies could not justify the quality of their products to the users and users are left with uncertainties on the quality of the software. A study was conducted to investigate the current practice and perception on software quality and assessment in Malaysian industries. Forty-three organisations were surveyed to answer several issues on quality and certification. Some of the important findings from this survey are the need for standard and mechanism in software assessment and the need for independent party certification to justify the quality status of software products. This paper discusses more finding of this survey.
 
Keywords: Software quality, software certification, Malaysia
 

 
 
THE INFLUENCE OF DEMOGRAPHIC FACTORS ON BUSINESS SIMULATION EFFECTIVENESS
*Mohd. Hizam Hanafiah1 and **Md. Daud Ismail
*School of Entrepreneurship and Business, University of Essex Southend
Princess Caroline House, 1 High Street, Southend-On-Sea
Essex SS1 1JE, United Kingdom
**School of Business Management, Faculty of Economics and Business
Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan Malaysia
Email: mhizamhanafiah@ googlemail.com, m.ddaud@pkrisc.cc.ukm.my
 
ABSTRACT FULL TEXT
Educators, employers and policy makers have been searching for ways to help their student learn to think. In order to assist student to think and solve problems, business educators have turned to business simulation as an alternative way to develop people. Business simulation is a teaching method that can assist in developing a learning environment, which exposes students to complex situations that needs strategic decision- making. At Faculty of Economics and Business UKM, business simulation has been integrated in strategic management course as a platform for students to make management decision in a dynamic environment. A study on 165 students had been conducted to measure the influence of demographic factors on the effectiveness of business simulation. Our findings show that students’ gender, race, academic qualification, academic program and career ambition have influenced the simulation effectiveness. On the other hand, students’ C.G.P.A, simulation performance, English language capability and working experience have no influence on the effectiveness of business simulation.
 
Keywords: Business simulation, demographic factor, teaching tools, business games, strategic management.

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