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Articles by M.Z.A. Ab Kadir
Total Records ( 2 ) for M.Z.A. Ab Kadir
  A.D. Usman , W.F. Wan Ahmad , M.Z.A. Ab Kadir and M. Mokhtar
  Problem statement: Inadequate knowledge of electromagnetic field emitted by mobile phones and increased usage at close proximity, created a lot of skepticism and speculations among end users on its safety or otherwise. Approach: In this study, near field electromagnetic field radiation measurements were conducted on different brand of mobile phones in active mode using a tri-axis isotropic probe and electric field meter. Results: The highest electromagnetic field exposure was recorded when the mobile phones are at outgoing call mode and backing the probe, which is higher in comparison to ICNIRP guidelines for exposure to general public. Conclusion: According to this finding, some mobile phones electromagnetic field radiation were found to be lower than the ICNIRP guidelines while some were far above the guidelines. Electromagnetic field intensity however, depends on the mode of operation and proximity of the mobile phones to the end user; hence it is safer to use mobile phones at SMS mode.
  M.Z.A. Ab Kadir , W.F. Wan Ahmad , J. Jasni and H. Hizam
  This research focuses on the simulation of the effect of corona model on different conductors used in transmission line design when subjected to the lightning surge. The paper details the procedures used in modelling the corona, as well as the implementation in the PSCAD/EMTDC software for surge propagation studies. There are many models available range from a simple and fixed capacitance to the more complex voltage-dependent capacitance. The corona used for this study is modelled based on the approached relationships and the analyses were done by comparing the results with other models for different types of conductors. The travelling voltage is then measured at different point-of-interest (POI) and compared in terms of the steepness and magnitude for different conductors.
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