Now showing items 1-20 of 115

    • Discrimination and classification of Eurycoma longifolia Jack in medicinal foods by means of a DSP-based electronic taste sensor 

      M. Z., Abdullah; A.S.A., Rahman; Ali Yeon, Md Shakaff; Mohd Noor, Ahmad (SAGE Publications, 2004)
      Eurycoma longifolia Jack (ELJ), better known as Malaysian Ginseng, is fast becoming popular due to its efficacy as a general health and testosterone booster, and for its known aphrodisiac properties. With the growing ...
    • Comparison of losses and flux distribution in 3 phase 100 kVA distribution transformers assembled from various type of T-Joint geometry 

      Ismail, Daut; Dina Maizana, Maiz Ahmad; Shuhaimi, Zakaria; S. Uthman; Soib, Taib (Science Publications, 2006)
      This paper describes results of an investigation of the variation of power loss, building factor, flux leakage and flux distribution in 3-phase model transformer cores assembled from various type of T-joint geometry. The ...
    • Design of a single-phase rectifier with improved power factor and low THD using boost converter technique 

      Ismail, Daut; Rosnazri, Ali; Soib, Taib (Science Publications, 2006)
      The method of using Boost type of converter was proposed for a 300W single-phase rectifier in this paper. By designing the necessary techniques and methodology, the overall Power Factor (PF) and Total Harmonic Distortion ...
    • Characteristic Curve of a Fuel Cell 

      Muzamir, Isa; Baharuddin, Ismail; Che Mat Hadzer; Ismail, Daut; Faizah, Abu Bakar (Science Publications, 2006)
      The aim of this study was to deliver information about the features of fuel cells. It cover analysis of theory and experiment done using a set of tool called Hydro Genius Teach. The experiment is about investigating the ...
    • The effects of harmonic components on transformer losses of sinusoidal source supplying non-linear loads 

      Ismail, Daut; Syafruddin, Hasan; Rosnazri, Ali; Samila, Mat Zali; Haziah, Abd Hamid (Science Publications, 2006)
      An important consideration when evaluating the impact of harmonics is their effect on power system component and loads. Sinusoidalare major components in power systems. The increased losses due to harmonic distortion can ...
    • Diagnosis of MV oil filled cable terminations with X-ray imaging and infrared (IR) thermography 

      Mohd Rafi, Adzman; Ismail, Daut, Prof. Dr.; Muzamir, Isa; Baharuddin, Ismail; Omar, Aliman; Lehtonen, Matti; Hyvonen, Petri (Science Publications, 2007)
      A main purpose of doing a diagnostic in cable system including its accessories such as impregnated paper insulated oil filled cable termination is to predict failure before they occur. Those cable and accessories, which ...
    • Simplification of sun tracking mode to gain high concentration solar energy 

      Omar, Aliman; Ismail, Daut; Muzamir, Isa; Mohd Rafi, Adzman (Science Publications, 2007)
      Power conversion from solar thermal energy to electrical energy is still very cost-intensive. Serious effort has to be given in the development of the concentrator or heliostat structure expenditure which contributing the ...
    • Computer designed solar concentrator 

      Omar, Aliman; Ismail, Daut; Muzamir, Isa; Mohd Rafi, Adzman (International Association of Science and Technology for Development (IASTED)/ACTA Press, 2007)
      This paper discusses a computer designed optical concentrator, which is providing efficient solar energy transfer to a Stirling Engine. The receiver can make line focusing onto the absorber of Stirling engine located at ...
    • Tracking error analysis of a rotation-elevation mode heliostat 

      Omar, Aliman; Ismail, Daut; Muzamir, Isa; Mohd Rafi, Adzman (Science Publications, 2007)
      For the past few years, great efforts have been done in improving the tracking accuracy of a newly proposed rotation-elevation tracking mode heliostat. A special simulation program has been developed to systematically ...
    • Tracing generators' output in transmission open access 

      Mohd Herwan, Sulaiman; Omar, Aliman; Mohd Wazir, Mustafa; Ismail, Daut (Institute of Electrical and Electronics Engineering (IEEE), 2007-12)
      Over the past few years, the electric power utility industries around the world have experienced a strong drive towards deregulation. Based on the experience of deregulation of the communication, natural gas and airline ...
    • Power flow and loss tracing in deregulated transmission system using proportional tree method 

      Mohd. Herwan, Sulaiman; Mohd. Wazir, Mustafa; Omar, Aliman (Praise Worthy Prize S.r.l., 2008)
      Tracing the flow of electricity becomes an important issue in transmission open access. This is due to transmission open access may bring the fairness and transparency to all users. Since the complexity of electrical ...
    • A critical review-power quality concerns 

      Anayet, Karem; Ismail, Daut; Indra, Nisja; Dina Maizana, Maiz Ahmad; Rajendran, S. (Universiti Malaysia Perlis, 2008)
      Power system quality concerns is the art and science of analyzing power system performance within a facility to determine potential problem areas or to better understand known problems in an electrical distribution system. ...
    • Tracing real and reactive power in open access network 

      Mohd Herwan, Sulaiman; Mohd Wazir, Mustafa; Omar, Aliman; Ismail, Daut (Universiti Malaysia Perlis, 2008)
      The main objective of this paper is to present a simple and general methodology for tracing the power output of each generator to the line flows and loads through out the electrical power network. The tracing algorithm is ...
    • Effect of stack of transformer core lamination on losses and flux distribution in 3-phase distribution transformers 1000kVa 

      Ismail, Daut; Dina Maziana, Maiz Ahmad; Shuhaimi, Zakaria; Soib, Taib (Universiti Malaysia Perlis, 2008)
      This paper describes the results of an investigation on the effect of different amount of layers per stack of core lamination in the three of 3-phase distribution transformers 1000kVA. The investigation involves the variation ...
    • Determination of power flow and loss allocation using superposition theory method 

      Mohd Herwan, Sulaiman; M.W., Mustafa; O., Aliman; Ismail, Daut, Prof. Dr. (Regional Energy Resources Information Center (RERIC), Asian Institute of Technology, 2008-03)
      This paper discussed a method to determine power flow and loss from individual generator to particular load and line flows for transmission open access. Based on solved load flow, the method uses basic circuit theories ...
    • Comparing the network performance between the installation of DG and compensating capacitor using EP 

      Siti Rafidah, Abdul Rahim; Titik Khawa, Abdul Rahman, Prof. Dr.; Ismail, Musirin, Dr.; Shahrul Ashikin, Azmi; Mohd Fayzul, Mohammed; Muhamad Hatta, Hussain; Mohammad Faridun Naim, Tajuddin (Universiti Teknologi MARA (UiTM), 2008-08)
      Rapid industrialization and population growth have resulted in an escalation in the electrical power demand. Due to limited area and slow progress in network expansion some regions have become high density load areas, for ...
    • Tracing reactive power flow and loss in electric power systems 

      Mohd Herwan, Sulaiman; Mohd Wazir, Mustafa; Omar, Aliman; Ismail, Daut; Surya Hardi, Amrin; Mohamad Suhaizal, Abu Hassan (Regional Energy Resources Information Center (RERIC), Asian Institute of Technology (AIT), 2009-03)
      This paper suggests a systematic method to trace the reactive power flow and loss named as Proportional Tree Method (PTM). From the power flow solution, the test system is modeled conceptually like a tree, where the reactive ...
    • Small-signal AC modeling technique of Buck converter with DSP based Proportional-Integral-Derivative (PID) controller 

      Mohd Faridun Naim, Tajuddin; Rahim, N. A. (IEEE, 2009-12-16)
      Control applications of switched mode power supplies have been widely explored. The main objective of research and development (R&D) in this field has always been to find the simplest method to analyze and model the DC/DC ...
    • Evaluation of the localised loss transformer core lamination 

      Dina Maizana, Maiz Ahmad (Asian Network for Scientific Information, 2010)
      The magnetic flux has to change its direction at butt-joint meanwhile at butt-joint occur the hot spot. The hot spot can be measure using thermistor in term gradient temperature. These papers describe the result of measurement ...
    • Flux simulation on 100kVA three-phase transformer core 

      Dina Maizana, Maiz Ahmad, Ir.; Ismail, Daut, Prof. Dr.; Soib, Taib (Praise Worthy Prize S.r.l., 2010-06)
      This paper describes the simulation of flux distribution on 100kVA 3 phase distribution transformer assembled with 60°-45° T-joint and mitred lap corner joint with stagger yoke and limb. The core that being used is 3% ...