IEM Journal: Recent submissions
Now showing items 281-300 of 310
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A systematic approach for monitoring and evaluating the construction project progress
(The Institution of Engineers, Malaysia, 2006-09)A persistent problem in construction is to document changes which occur in the field and to prepare the as-built schedule. In current practice, deviations from planned performance can only be reported after significant ... -
UWB-TOA geolocation techniques in indoor environments
(The Institution of Engineers, Malaysia, 2006-09)Ultra-wideband (UWB) radio is a new carrierless communication scheme using impulses and is a candidate technology for future communication and ranging applications. In this paper, we consider the problem of node localizing ... -
Polymer waste recycling over fresh, steam deactivated and used FCC catalysts
(The Institution of Engineers, Malaysia, 2004-09)Feedstock recycling of high-density polyethylene (HDPE) over fluid catalytic cracking (FCC) catalysts (6:1 ratio) was carried out using a laboratory fluidised bed reactor operating at 450oC, atmospheric pressure and ... -
Implementation issues of adaptive OFDM in mobile radio environment
(The Institution of Engineers, Malaysia, 2004-09)A review of adaptive modulation with other related issues as part of link adaptation in an OFDM system is presented. Issues such as channel estimation, channel coding, Multiple Input and Multiple Output (MIMO) system are ... -
Kesan kuantiti agen penyerak dalam pencirian saiz zarah oksida seramik menggunakan kaedah pembelauan laser
(The Institution of Engineers, Malaysia, 2005-03)Kertas kerja ini membincangkan isu kesan penambahan agen penyerak dalam pencirian saiz zarah oksida seramik dengan menggunakan kaedah pembelauan cahaya laser. Adalah diketahui umum bahawa zarah seramik terutamanya daripada ... -
Daily streamflow forecasting using simplified rule-based fuzzy logic system
(The Institution of Engineers, Malaysia, 2005-12)In this study, a simplified fuzzy logic system with uniform partitions in the input space is proposed for forecasting the daily streamflow of four river systems in Malaysia. The proposed simplified fuzzy logic system was ... -
Development status of indigenous computational fluid dynamics software for arbitrary complex geometry
(The Institution of Engineers, Malaysia, 2005-12)This paper describes the development status of an indigenous Computational Fluid Dynamics (CFD) software (FLOWSIM) capable of handling complex geometry. It addresses the development of the pre-processor, post-processor ... -
Transient heat transfer analysis on a satellite in an orbit
(The Institution of Engineers, Malaysia, 2004-09)A parametric study has been carried out on emissivities of the surfaces, shell thicknesses and materials of a satellite structure in order to obtain useful information for satellite thermal engineering design. This is ... -
Detection of a single rolling element bearings fault via relative shaft displacement measurement
(The Institution of Engineers, Malaysia, 2004-09)This paper describes with the investigation of using relative shaft displacement approach to detect early rolling element bearings fault. Rolling element bearings are among the most common elements used in the operation ... -
Drag reduction in aircraft model using Elliptical winglet
(The Institution of Engineers, Malaysia, 2005-12)Aerodynamic characteristics for the aircraft model with NACA (National Advisory Committee for Aeronautics) wing No. 65- 3-218 have been studied using subsonic wind tunnel of 1000 mm x 1000 mm rectangular test section and ... -
Design and development of fretting fatigue test apparatus
(The Institution of Engineers, Malaysia, 2005-06)A detail survey of the existing fretting fatigue test equipments used is given and a new fretting fatigue test apparatus has been designed and fabricated. The fretting fatigue test apparatus permits the examination of the ... -
Monitoring of pH and temperature effects in fermentation process of itaconic acid
(The Institution of Engineers, Malaysia, 2005-12)The environmental conditions such as temperature and pH have great impact on microbial growth kinetics and product formation during fermentation process. Temperature can be related to activation energy that affects the ... -
Modeling of viscous flows in two-dimensional turbomachinery cascade via viscous-inviscid interaction method
(The Institution of Engineers, Malaysia, 2005-09)A two-dimensional time-accurate time-marching viscous flow solver employing the viscous-inviscid interaction method suitable for turbomachinery applications is described. The inviscid main flow solver uses the second-order ... -
Estimation of platinum gauzes catalyst for ammonia oxidation in nitric acid production
(The Institution of Engineers, Malaysia, 2005-12)This paper illustrates design aspects of a shallow bed reactor involving a very rapid reaction, which is a diffusion controlled reaction. The design of the bed composed of a small number of catalyst screens, is normally ... -
Analytical base transit time model of uniformly doped base bipolar transistors considering Kirk effect
(The Institution of Engineers, Malaysia, 2005-09)In this paper analytical expressions of effective base width and base transit time for uniformly doped base of bipolar junction transistors (BJT) are developed taking Kirk effect into consideration. Modern bipolar junction ... -
Ultimate strength of precast concrete sandwich panel with opening under axial load
(The Institution of Engineers, Malaysia, 2004-03)A precast sandwich panel which is being developed as a building system consists of a single layer of insulation sandwiched between two layers of reinforced concrete. At present, an equation to predict the ultimate strength ... -
Synergistic systems for spacecraft attitude control
(The Institution of Engineers, Malaysia, 2004-03)The synergistic system design could be an attractive approach for future spacecraft to cope with their demands. The idea of combining the Attitude Control System and the conventional Electrical Power System is presented ... -
Validation of MAGMAsoft simulation of the sand casting process
(The Institution of Engineers, Malaysia, 2004-09)There is an increasing demand in manufacturing environment for the best quality of casting products at the right time and quantity. Foundries must be able to meet the just in time (JIT) requirement in order to survive in ... -
Daylight modelling and thermal performance of atrium of new MECM building at Putrajaya
(The Institution of Engineers, Malaysia, 2004-09)Putrajaya, Malaysia. The LEO building was designed to incorporate renewable and energy efficiency strategies. Several window designs were considered for the new showcase building. To ascertain that innovative window designs ... -
Numerical simulation of dust cake build-up and detachment on rigid ceramic filters for high temperature gas cleaning
(The Institution of Engineers, Malaysia, 2004-03)Rigid ceramic filters have proved themselves as highly efficient gas filtration devices. However, the filter cleaning mechanisms by which deposited cake is removed from the filter surface are still not fully understood. ...