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Articles by N.A. Ghani
Total Records ( 3 ) for N.A. Ghani
  Z. Razak , N.A. Ghani , E.M. Tamil , M.Y.I. Idris , N.M. Noor , R. Salleh , M. Yaacob , M. Yakub and Z.B.M. Yusoff
  This study is focusing on off-line character recognition. The algorithm of pre-processing such as line and character segmentation is studied and determined so that the design can give a good result and can be implemented in hardware. A process of transformation towards the characters is done using discrete wavelet transform since, it will show the details of the pixels. After that, a process to generate a sequence of binary that using a value of threshold (threshold value is determine by experiment) is done so that it can be use for recognition process. This sequence of binary will be classified using Hamming distance which can trace bit changes in the two sequence of binary and the bit value distinction will be used to recognize the character.
  L.A. Kawsar , N.A. Ghani , A.A. Kamil , A. Mustafa , L.A. Kawsar , N.A. Ghani , A.A. Kamil and A. Mustafa
  Occupant safety is a major concern for a building in case of emergencies such as fire, bomb blast or earthquake. In such emergency situations, a quick and jam-free evacuation of pedestrian trapped in a network of corridors in buildings is most important. In this paper, we compared the throughputs for two different restrictions on the flow direction with the unrestricted flow for a facility. In this facility, occupants need to go through some source corridors which consists of multiple sources and from source corridors they can choose their nearest exiting corridors. The result indicates that in emergency situation a restricted flow direction of pedestrian increases the throughput of the network which eventually decreases the average evacuation time.
  N.A. Ghani , N. Ahmat , N.H. Ismail , I. Zakaria and N.K.N.A. Zawawi
  Phytochemical investigation of the stem bark of Polyalthia cauliflora var. cauliflora has led to the isolation of two chalcones and an alkaloid; 2’, 4’-dihydroxy-3’-methoxychalcone (1), 2’, 4’-dihydroxychalcone (2) and liriodenine (3). 2’, 4’-dihydroxy-3’-methoxychalcone (1) n was found to be cytotoxic against HL-60, MCF-7 and HeLa cancer cell lines with IC50 value of 12.2, 5.1 and 12.5 μg mL-1, respectively. 2’, 4’-dihydroxy-3’-methoxychalcone may prove to be useful in cancer treatment and prevention. The aims of this study were to extract, fractionate and isolate the chemical constituents from the stem bark of Polyalthia cauliflora var. cauliflora. Various chromatographic techniques including glass column chromatography, preparative thin layer chromatography and centrifugal chromatography had been used in this study. The isolated compounds were elucidated using several spectroscopic techniques including 1H and 13C NMR, IR, UV-Vis, mass spectroscopy and comparison with literature. Potential and sufficient amount of compounds were subjected to cytotoxic activity against HL-60, MCF-7 and HeLa cancer cell lines.
 
 
 
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