Kuala Selangor, Malaysia
Kuala Selangor, Malaysia

Multimedia University is a private university in Malaysia with over 20,000 students. The university hosts 8 faculties and 13 research centers within two campuses, one in Cyberjaya and one in Melaka. The distance between the two campuses is 150 kilometers, via the North South Expressway. Wikipedia.

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Liew K.W.,Multimedia University | Nirmal U.,Multimedia University
Materials and Design | Year: 2013

This work is aimed to study the tribological properties difference of potentially new designed non-commercial brake pad materials with and without asbestos under various speed and nominal contact pressure. The two fabricated non-commercial asbestos brake pad (ABP) and non-asbestos brake pad (NABP) materials were tested and compared with a selected commercial brake pad (CMBP) material using a pin-on-disc tribo-test-rig under dry contact condition. Results showed that friction coefficients for all materials were insensitive to increasing speed and pressure. NABP maintained stable frictional performance as ABP material when contact temperature elevated. Moreover, NABP proved to have greater wear resistance compared to ABP and CMBP materials. Furthermore, the SEM micrographs of brake pad surfaces showed craters which is due to disintegration of plateaus. Finally, the test results indicated that the NABP has the potential braking characteristic for a brake pad material. © 2012 Elsevier Ltd.

Tan C.-K.,Multimedia University
Computers and Education | Year: 2012

A Graphing Calculator (GC) is one of the most portable and affordable technology in mathematics education. It quickens the mechanical procedure in solving mathematical problems and creates a highly interactive learning environment, which makes learning a seemingly difficult subject, easy. Since research on the use of GCs for the teaching and learning of probability in institutions of higher learning appears to be limited, a study was conducted to examine the effects of the use of GCs on students' performance in probability. The study involved 65 pre-university students in a private institution of higher learning in Malaysia. Hypothesis testing showed that there is a significant difference in the mean score of the post achievement test between the experimental and control groups. Students in the experimental group displayed higher achievement than their peers in the control group in the Probability Achievement Test (PAT). Findings also showed that the use of GCs benefits students of all levels, that is, high, average and low mathematics achievers. Qualitative data provides a more lucid picture of how GCs aid in improving understanding and performance. Recommendations made will provide researchers, policy-makers and educators an alternative means of enhancing the quality of probability education. © 2012 Elsevier Ltd. All rights reserved.

Hung Y.M.,Multimedia University
Heat Transfer Engineering | Year: 2010

This article presents an analytical study on forced convection of laminar fully developed flow of incompressible, constant-property nanofluids in microchannels. Closed-form solutions for the temperature distributions in the radial direction with the incorporation of viscous dissipation are obtained under isoflux boundary condition. The effects of the governing parameters, including modified Brinkman number, thermal conductivity ratio, and nanoparticle volume fraction of the nanofluids, on the temperature distributions are investigated and analyzed for both heating and cooling processes. The heat transfer performance characterized by the Nusselt number is investigated based on the effects induced by these parameters. In the comparison between the models with and without viscous dissipation, it is found that the thermal performance of a microchannel is overrated when viscous dissipation is excluded in the analysis. It is concluded that these governing parameters are intimately interrelated in the flow and thermal analyses of nanofluids in microchannels. The interrelationship of the viscous dissipation effect and the nanoparticle volume fraction is examined in a contour deviation map of Nusselt numbers between the model with and without considering the viscous dissipation. Copyright © Taylor and Francis Group, LLC.

Solarin S.A.,Multimedia University | Shahbaz M.,COMSATS Institute of Information Technology
Renewable and Sustainable Energy Reviews | Year: 2015

The objective of this paper is to reinvestigate the relationship between natural gas consumption and economic growth by including foreign direct investment, capital and trade openness in Malaysia for the period of 1971-2012. The structural break unit root test is employed to investigate the stationary properties of the series. We have applied combined cointegration test to examine the relationship between the variables in the long run. For robustness sake, the ARDL bounds testing method is also employed to test for a possible long run relationship in the presence of structural breaks. We note the validity of cointegration between the variables. Natural gas consumption, foreign direct investment, capital formation and trade openness have positive influence on economic growth in Malaysia. The results support the presence of feedback hypothesis between natural gas consumption and economic growth, foreign direct investment and economic growth, and natural gas consumption and foreign direct investment. The policy implications of these results are provided. © 2014 Elsevier Ltd. All rights reserved.

Oh T.H.,Multimedia University
Renewable and Sustainable Energy Reviews | Year: 2010

Secure, reliable and affordable energy supplies are necessary for sustainable economic growth, but increases in associated carbon dioxide (CO 2) emissions, and the associated risk of climate change are a cause of major concern. Experts have projected that the CO2 emissions related to the energy sector will increase 130% by 2050 in the absence of new policies or supply constraints as a result of increased fossil fuel usage. To address this issue will require an energy technology revolution involving greater energy efficiency, increased renewable energies and nuclear power, and the near-decarbonisation of fossil fuel-based power generation. Nonetheless, fossil fuel usage is expected to continue to dominate global energy supply. The only technology available to mitigate greenhouse gas (GHG) emissions from large-scale fossil fuel usage is carbon capture and storage (CCS), an essential part of the portfolio of technologies that is needed to achieve deep global emission reductions. However, CCS technology faces numerous issues and challenges before it can be successfully deployed. With Malaysia has recently pledged a 40% carbon reduction by 2020 in the Copenhagen 2009 Climate Summit, CCS technology is seen as a viable option in order to achieve its target. Thus, this paper studies the potential and feasibility of coal-fired power plant with CCS technology in Malaysia which includes the choices of coal plants and types of capture technologies possible for implementation. © 2010 Elsevier Ltd. All rights reserved.

Chua S.C.,Multimedia University | Oh T.H.,Multimedia University
Renewable and Sustainable Energy Reviews | Year: 2010

This paper aims to present a review on Malaysia's national energy developments by looking at various angles in terms of renewable energy and energy efficiency. Energy demand and consumption by sectors are presented as well as the fuel mix in electricity generation. Key energy policies implemented from the incorporation of Malaysia's national oil company, Petronas in 1974 until the National Green Technology Policy 2009 and a future policy will be addressed. The roles of key players as well as important agencies in energy development are briefly presented. Key programmes in energy development such as Malaysian Industrial Energy Efficiency Improvement Project, Small Renewable Energy Power Programme and Building Energy Efficiency Programme are discussed as well as successful initiatives from the programmes. Malaysia's international involvements towards reduction of greenhouse gas emissions and carbon emissions especially Montreal Protocol and Kyoto Protocol are highlighted. As a conclusion, Malaysia is aware of its role in formulating its national energy development policies, sensitive towards the country's development towards the environment and utilization of energy resources as well as conscientious and responsive towards the call for sustainable development in promoting renewable energy and energy efficiency. © 2010 Elsevier Ltd. All rights reserved.

Thwin S.S.,Multimedia University
Progress in Electromagnetics Research Letters | Year: 2013

A new printed monopole antenna configuration, asymmetric inverted cone ring monopole antenna, is proposed. The proposed antenna which has the size of 23.6mm £ 40 mm, is fabricated on a low- cost FR4 substrate that has the relative permittivity (εr) of 4.4 and substrate thickness of 1.6mm to operate in the UWB band (3.1 GHz to 10.6 GHz) released by Federal Communications Commission (FCC) in 2002. It gives an ultra-wide impedance bandwidth of VSWR · 2 from 2.9 GHz to 35 GHz (169.4%) for numerical result and from 3.1 GHz to 31.1 GHz (163.74%) for experimental result. Moreover, it exhibits omni-directional radiation patterns with acceptable gain across the whole operation band, which meets the requirements of UWB appli- cations. The parameters which affect the performance of the antenna characteristics are investigated in this paper. The simulated results have a good agreement with the measured ones, and the proposed antenna shows that it is a very good candidate for UWB operations.

The main goal of this study is to examine the events that caused the environmental degradation in the MENA (Middle East and North African) region. To achieve the goal of this study, a panel model that represents the environmental degradation utilizing ecological footprint as a better indicator is constructed taken the period 1996-2012 investigating 14 MENA countries. The results from the Pedroni cointegration test revealed that ecological footprint, energy consumption, urbanization, trade openness, industrial development and political stability are cointegrated. Moreover, the results of FMOLS (fully modified ordinary least square) concluded that energy consumption, urbanization, trade openness and industrial development increases environmental damage while the political stability lessens it in the long run. In addition, the Granger causality revealed that the used variables have short run and long run causal relationship with the ecological footprint. Moreover, different directions of causal relationship were found between the variables. According to the outcomes of this study, a number of policy recommendations were provided for the MENA countries that can help them to reduce their environmental degradation. © 2015 Elsevier Ltd.

Tan A.H.,Multimedia University
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics | Year: 2012

This paper proposes a new mixed training algorithm consisting of error backpropagation (EBP) and variable structure systems (VSSs) to optimize parameter updating of neural networks. For the optimization of the number of neurons in the hidden layer, a new term based on the output of the hidden layer is added to the cost function as a penalty term to make optimal use of hidden units related to weights corresponding to each unit in the hidden layer. VSS is used to control the dynamic model of the training process, whereas EBP attempts to minimize the cost function. In addition to the analysis of the imposed dynamics of the EBP technique, the global stability of the mixed training methodology and constraints on the design parameters are considered. The advantages of the proposed technique are guaranteed convergence, improved robustness, and lower sensitivity to initial weights of the neural network. © 1996-2012 IEEE.

Chua S.C.,Multimedia University | Oh T.H.,Multimedia University
Renewable and Sustainable Energy Reviews | Year: 2012

Predicted to be the clean energy of tomorrow, solar energy has been in the forefront of energy development in many developed countries and a potential source of energy to developing countries like Malaysia. This paper presents Malaysia's solar energy or solar photovoltaic developmental outlook. The study is done by first looking into the country's energy policies related to solar energy. Key players in the solar energy development such as government institutions are introduced. Early solar energy programmes and a key project called Malaysia Building Integrated Photovoltaic (MBIPV) as well as its successful initiatives will be presented. Measures which have taken by the government of Malaysia including attractive incentives to encourage solar photovoltaic development, the country's potential in solar energy, foreign investments and future directions as well a feed-in tariff scheme will be presented in length to provide a broad spectrum of solar energy development in Malaysia. The outlook has been positive and the country is active in promoting solar as an alternative energy and is aware of benefits it will bring toward its economic development in the future. © 2011 Elsevier Ltd. All rights reserved.

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