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Sadon S.K.,University of Tenaga Nasional | Din N.M.,University of Tenaga Nasional | Radzi N.A.,University of Tenaga Nasional | Yaacob M.B.,University of Tenaga Nasional | Maier M.,Jalan IKRAM UNITEN
ISTT 2014 - 2014 IEEE 2nd International Symposium on Telecommunication Technologies | Year: 2014

A multiple access Ethernet Passive Optical Network (EPON) testbed is proposed to provide a platform for testing and evaluating bandwidth allocation models. A few commercial and open source network simulators are available for EPON study but it does not take into account the real environment parameters and relatively difficult to configure. This paper proposes a simple effective EPON emulator testbed using several personal computers networked together that acts as EPON devices individually using Prolog. The testbed is a reprogrammable platform, enabling the testing of protocol for the EPON environment. A Dynamic Bandwidth Allocation (DBA) study was made for the EPON upstream traffic management using the emulator to illustrate its functionality. The design parameters studied are the offered load, amount of requested bandwidth for each type of traffic and the bandwidth allocated for the respective traffic type. © 2014 IEEE.


Saifuddin N.,Jalan IKRAM UNITEN | Raziah A.Z.,Jalan IKRAM UNITEN | Junizah A.R.,Jalan IKRAM UNITEN
Journal of Chemistry | Year: 2013

Carbon nanotubes (CNTs) are allotropes of carbon with a nanostructure that can have a length-to-diameter ratio greater than 1,000,000. Techniques have been developed to produce nanotubes in sizeable quantities, including arc discharge, laser ablation, and chemical vapor deposition. Developments in the past few years have illustrated the potentially revolutionizing impact of nanomaterials, especially in biomedical imaging, drug delivery, biosensing, and the design of functional nanocomposites. Methods to effectively interface proteins with nanomaterials for realizing these applications continue to evolve. The high surface-to-volume ratio offered by nanoparticles resulted in the concentration of the immobilized entity being considerably higher than that afforded by other materials. There has also been an increasing interest in understanding the influence of nanomaterials on the structure and function of proteins. Various immobilization methods have been developed, and in particular, specific attachment of enzymes on carbon nanotubes has been an important focus of attention. With the growing attention paid to cascade enzymatic reaction, it is possible that multienzyme coimmobilization would be one of the next goals in the future. In this paper, we focus on advances in methodology for enzyme immobilization on carbon nanotubes. © 2013 N. Saifuddin et al.


Raffee S.M.,University of Tenaga Nasional | Karim M.S.A.,University of Tenaga Nasional | Hassan Z.,Jalan Ikram Uniten
ARPN Journal of Engineering and Applied Sciences | Year: 2016

Throughout the globe, there are various types of sustainable assessment such as LEEDS, BREEAM, HK-BEAM and ENERGY Star. In Malaysia, Green Building Index (GBI) is the authorized agency who works on sustainable assessment. Different sustainable agencies provide different methods, have different documentation procedures and generate reports. To leverage the current information technology in construction industry, BIM is introduced as one of the greatest tools to assist information sharing among construction players. BIM concept provides platform for information sharing and integration requirements by promoting interoperability between various applications. Thus this paper presents sustainability assessment methods by applying in a single framework. © 2006-2016 Asian Research Publishing Network (ARPN).


Thian S.Y.,Jalan Ikram Uniten | Lee C.Y.,Jalan Ikram Uniten
International Journal of Applied Engineering Research | Year: 2015

This study presents the results of constant volume undrained direct simple shear tests performed on Terengganu offshore clay (TOC) at variable overconsolidation ratios (OCR) and shearing rates. The undrained shear strength increases as shearing rate increases in constant volume simple shear tests. It is also found that the normalized undrained strength of TOC specimen increases with OCR. Similarly, the overconsolidated TOC specimens yield higher normalized stiffness than that of normally consolidated clay specimens. © Research India Publications.

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