Mohamad Nor N.,Multimedia University |
Yunus S.,Multimedia University |
Trlep M.,University of Maribor |
Othman M.,Universiti Sains Islam Malaysia |
And 3 more authors.
International Journal of Electrical Power and Energy Systems | Year: 2014
This paper investigates the effects of current magnitudes, steady-stage earth resistances, RDC, and threshold electric field, Ec on the characteristics of earthing systems under impulse conditions by using Finite Element Method (FEM). It has been reported in literature that there are three scenarios that can occur when the earthing systems are subjected under high impulse conditions as compared to its steady-state conditions, namely; (i) no difference in its resistance values between steady-state and impulse conditions, (ii) earth resistances under impulse were found to be lower than that at steady-state, and (iii) earth resistances were found to be higher under impulse than that at steady-state. It was found that the largest reduction in impulse resistance occurred for the earth resistance with the highest values for different factors; current magnitudes and Ec. © 2014 Published by Elsevier Ltd. All rights reserved.
Kumar Yogeesh D.,Nilai University |
Chandrasekaran M.,Vels University |
Eriki Ananda K.,Caledonian College of Engineering |
Reddy J.,Jawaharlal Nehru Technological University Anantapur
ARPN Journal of Engineering and Applied Sciences | Year: 2016
In this paper, optimize the vibrational analysis of power train by decoupling method in the field of automotive. Power train (Engine and gear box) is typically connected to the chassis by three or four rubber mounts. Ideal engine mounts should isolate engine vibrations caused by engine disturbances in the engine speed range and prevent large engine movement from shock excitations from vehicle accelerations, braking and road undulations. The design of power train/mount system involves selection of stiffness coefficients, location and orientation of the individual rubber mounts. Rubber mount location and orientation is decided by designer based on packaging constraints. The goal in this project is to find the engine mount stiffness values corresponding to natural frequencies and mode shapes of the power train system/mount system. CAE find stiffness values and coordinates corresponding to natural frequencies by optimization. © 2006-2016 Asian Research Publishing Network (ARPN).
Lau C.Y.,Nilai University |
Ang W.L.,INTI International University
Advanced Science Letters | Year: 2016
This article investigates the on-going issue that is associated with China’s String of Pearls (SOP) strategy in South China Sea which has trespassed on Malaysia’s water territories, analyzed from the perspectives of military costs, international business trade relation, and natural resources acquisition as well as its possible impact on Malaysia’s position in South China Sea using the game theory. China’s vision is to expand its seaborne trading route strategy to secure its commodity and energy transaction by mobilizing the sea channel ’silk road’, otherwise also known as the String of Pearls strategy. Each ‘pearl’ plays a unique, different role in different location for its mixed strategy in the international trading area especially in the Spratly Islands. Currently, China has been aggressive in the South China Sea by provoking Vietnam, the Philippines, and Malaysia. Therefore, international trade relation between China and Malaysia is questionable. However, Malaysia’s ‘status quo’ strategy that is analyzed and reflected in the game theory may be adopted as the possible solution to this pertinent issue, paving the way for Malaysia to also serve as a role model within the ASEAN region to end the conflict and gain sustainable economic growth. © 2016 American Scientific Publishers. All rights reserved.
Zainuddin A.,University Putra Malaysia |
Adam N.M.,University Putra Malaysia |
Rusli I.H.,Nilai University |
Kwong Q.J.,University Putra Malaysia
Applied Mechanics and Materials | Year: 2014
This paper studies the current thermal comfort condition of an air-conditioned cafeteria based on objective measurements and computational fluid dynamics (CFD) modeling. Indoor comfort parameters such as temperature and airflow rate were simulated by a CFD tool. The results from field measurements and predicted values were then compared and contrasted. A simulated model that has the same geometrical configuration as the cafeteria was set as a benchmark model. Several additional models with different configuration of cafeteria layouts were proposed to achieve the required air temperature. It was found that the predicted results from the proposed models showed even distributions of airflow characteristics and temperature gradients. To maintain a thermally-acceptable air temperature of 28 °C, it is proposed that an additional air-conditioning unit be retrofitted to the current cafeteria layout. © (2014) Trans Tech Publications, Switzerland.
Eriki A.K.,Nilai University |
Rao K.P.,Jawaharlal Nehru Technological University Anantapur |
Varaprasad K.C.,Sri Venkateswara University
Applied Mechanics and Materials | Year: 2014
Titanium has been perceived as a material that is difficult to machine. Manufacturers are known that, with proper procedures, titanium can be fabricated using techniques no more difficult than those used for machining SS316. The machining of hard workpiece materials requires significantly harder cutting materials. Advancements in the aerospace, nuclear and other industries require the enhanced in-service performance of engineering components. These requirements have resulted in a large scale development and use of heat-resistant and high-strength materials, such as Ti6A4Valloys, which pose considerable machining problems. In this analysis on machining of titanium alloy using cubic boron nitride (cBN) tools, the machining performance was evaluated in terms of cutting force, specific cutting pressure, cutting temperature, chip strain and surface finish. The studies of turning machinability of titanium alloy using round tee-lock cubic boron nitride (cBN) inserts have been presented. A series of turning experiments were performed with cubic boron nitride (cBN) inserts with the objective: To determining the effect of cutting variable on the tool life. To investigate the effect of cutting speed and feed rate on the surface roughness while using round tee - lock inserts. A good surface finish of 0.5 to 1 micron was obtained for cutting speed between 15 - 45 m/min, feed of 0.10 to 0.20 mm/rev and depth of cut of 1 mm and also find the stress intensity in two different axis will be studied. © (2014) Trans Tech Publications, Switzerland.
Shahabuddin N.S.,Nilai University |
Bakar R.A.,Nilai University
Proceedings of the 2015 International Conference on Automation, Cognitive Science, Optics, Micro Electro-Mechanical System, and Information Technology, ICACOMIT 2015 | Year: 2015
A multiwavelength fiber ring laser is demonstrated using a nonlinear polarization rotation (NPR) effect. An isolator and a photonic crystal fiber are incorporated in an Erbium doped fiber laser (EDFL) to generate intensity-dependent transmission induced by the NPR effect which allows the multiwavelength generation at room temperature. A stable 17 lasing lines in 1560 nm region are generated. The multiwavelength Erbium doped fiber laser (EDFL) exhibits spacing of 0.27 nm. EDF pump power was varied from 30 mW to 120 mW. Higher Erbium doped fiber (EDF) pump power generally leads to more multiwavelength generation at the expense of lower SNR due to higher noise level. © 2015 IEEE.
Mah S.K.,Nilai University |
Mah S.K.,University of Tenaga Nasional |
Ahmad I.,University of Tenaga Nasional |
Ker P.J.,University of Tenaga Nasional |
Noor Faizah Z.A.,Nilai University
Journal of Telecommunication, Electronic and Computer Engineering | Year: 2016
Gate length shrinkage is still the widely used method in transistor downsizing. In view of this, the downsizing of Equivalent Oxide Thickness (EOT) is also of high importance as it is the main focus in the process. Therefore, various studies on Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) fabricated from high-k dielectric and metal gate have been reported till today. In this paper, a 14nm silicon based n-type MOSFET was virtually fabricated using Lanthanum Oxide (La2O3) on Titanium Silicide (TiSi2). ATHENA and ATLAS modules from SILVACO were used for process and device simulation respectively. The results from this work show that the threshold voltage, VTH, on-current, ION and off-current, IOFF are 0.208397 V, 4.80048 x 10-5 A/μm and 1.00402 x 10-7 A/μm respectively. Furthermore, it is demonstrated that the development of high-k/metal gate MOSFET is a promising prospect for high performance nanoscale transistors.
Yee W.,Nilai University
World Journal of Microbiology and Biotechnology | Year: 2016
Over the years, microalgae have been identified to be a potential source of commercially important products such as pigments, polysaccharides, polyunsaturated fatty acids and in particular, biofuels. Current demands for sustainable fuel sources and bioproducts has led to an extensive search for promising strains of microalgae for large scale cultivation. Prospective strains identified for these purposes were among others, mainly from the genera Hematococcus, Dunaliella, Botryococcus, Chlorella, Scenedesmus and Nannochloropsis. Recently, microalgae from the Selenastraceae emerged as potential candidates for biodiesel production. Strains from the Selenastraceae such as Monoraphidium sp. FXY-10, M. contortum SAG 47.80, Ankistrodesmus sp. SP2-15 and M. minutum were high biomass and lipid producers when cultivated under optimal conditions. A number of Selenastraceae strains were also reported to be suitable for cultivation in wastewater. This review highlights recent reports on potential strains from the Selenastraceae for biodiesel production and contrasts their biomass productivity, lipid productivity as well as fatty acid profile. Cultivation strategies employed to enhance their biomass and lipid productivity as well as to reduce feedstock cost are also discussed in this paper. © 2016, Springer Science+Business Media Dordrecht.
Logeswaran R.,Nilai University
IEEE ICSIPA 2013 - IEEE International Conference on Signal and Image Processing Applications | Year: 2013
Selamat Datang (Welcome!) to the 2013 IEEE International Conference on Signal and Image Processing Applications or more fondly known as IEEE ICSIPA 2013. As the 3rd in the series, this flagship conference of the IEEE Signal Processing Society (Malaysia) (awarded Best Signal Processing Chapter 2011) has a good reputation for quality and a forum for valuable exchange of knowledge. It gains participation of esteemed researchers from both the local and international arena. This year, 169 papers were submitted by authors from various countries, with the majority being international authors. Of these, about 48% the papers were accepted and are to be presented at the conference. © 2013 IEEE.
Zaharinie T.,University of Malaya |
Huda Z.,Nilai University |
Izuan M.F.,University of Malaya |
Hamdi M.,University of Malaya
Applied Surface Science | Year: 2015
Abstract Brazing experiments on commercially-pure copper plates, using brazing filler metal (MBF-2005), are conducted at temperatures in the range of 650-750 °C for time-durations in the range of 5-15 min. Shear tests for braze-joints involved use of a universal testing machine. Based on the shear-test results, a new brazing cycle has been developed that corresponds to the greatest shear strength of the braze-joint. The brazing cycle has been performed under a controlled dry-argon atmosphere in a tube furnace. Microscopic observations were made by use of both optical and electron microscopes; whereas surface roughness measurements were made by using a TR100 Surface Roughness Tester. It is found that successful brazing and good wetting can be achieved by the least voids by using an average surface roughness (Ra value) for the base material. © 2015 Elsevier B.V. All rights reserved.