Sign inSubmit
Tips: “quotes” for a phrase · author:Lee · a DOI goes straight to its article

28 results for “O. O. Khalifa”
Set a search alert
Research ArticleOpen accessIn the author namesAdvances in Electromyogram Signal Classification to Improve the Quality of Life for the Disabled and Aged PeopleMd. R. Ahsan, Muhammad I. Ibrahimy, Othman O. KhalifaProblem statement: The social demands for the Quality Of Life (QOL) are increasing with the exponentially expanding silver generation. To improve the QOL of the disabled and elderly people, robotic researchers and biomedical engineers have been trying to combine their techniques into the rehabilitation systems. Various biomedical signals (biosignals) acquired from a specialized tissue, organ, or cell system like the … …Journal of Computer Science, Vol. 6, Issue 7 · 31 Jul 2010 · 8,817 accessesView PDFCite
Research ArticleOpen accessIn the author namesFade Margin Analysis Due to Duststorm Based on Visibility Data Measured in a DesertMd. Rafiqul Islam, Zain Elabdin Elshaikh, Othman O. Khalifa et al.Problem statement: The fade margin analysis of microwave propagation in areas affected by duststorm had been presented in this study. Approach: Based on long term duststorm data recorded in Riyadh-Saudi Arabia, the fade margin due to duststorm effects estimated. Results: The fade margin due to duststorm then derived under various water contents during the storm. Conclusion/Recommendations: It was particularly shown … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 7,679 accessesView PDFCite
Research ArticleOpen accessIn the author namesConvolution Coder Software Implementation Using VIiterbi Decoding AlgorithmO. O. Khalifa, T. Al-maznaee, M. Munjid, A. H.A. HashimIn this study, Convolutional coder software implementation using Viterbi decoding algorithm for bitstream that had been encoded using forward error correction was presented. It discussed the detailed description and steps involved in simulating a communication channel using convolutional encoding with Viterbi decoding. The steps involved generating random binary data, convolutionally encoding the data, passing the encoded data through a noisy … …Journal of Computer Science, Vol. 4, Issue 10 · 31 Oct 2008 · 6,747 accessesView PDFCite
Research ArticleOpen accessIn the author namesReed-Muller Codec Simulation PerformanceO. O. Khalifa, A. H. Abdullah, N. Suriyana et al.The approach to error correction coding taken by modern digital communication systems started in the late 1940's with the ground breaking work of Shannon, Hamming and Golay. Reed-Muller (RM) codes were an important step beyond the Hamming and Golay codes because they allowed more flexibility in the size of the code word and the number of correctable errors per code … …Journal of Computer Science, Vol. 4, Issue 10 · 31 Oct 2008 · 7,290 accessesView PDFCite
Research ArticleOpen accessIn the author namesModified Ratio-Type Estimators of the Mean using Extreme Ranked Set SamplingAmer Ibrahim Al-Omari, Khalifa Jaber, Ahmad Al-OmariModified ratio-type estimators of the population mean were suggested using the first or third quartiles of the auxiliary variable based on Simple Random Sampling (SRS) and Extreme Ranked Set Sampling (ERSS) methods. It was found that, the ERSS was more efficient than the SRS based on the same sample size. Also, the ERSS involving the first quartile was superior to … …Journal of Mathematics and Statistics, Vol. 4, Issue 3 · 30 Sep 2008 · 7,366 accessesView PDFCite
Research ArticleOpen accessIn the author namesPercentile Double Ranked Set SamplingAmer Ibrahim Al-Omari, Khalifa H. JaberIn this paper, percentile double ranked set sampling (PDRSS) method is suggested for estimating the population mean. The PDRSS method is compared with the simple random sampling (SRS), ranked set sampling (RSS), median ranked set sampling (MRSS) and the extreme ranked set sampling (ERSS) methods. When the underlying distribution is symmetric, it turns out that PDRSS produce unbiased estimators of … …Journal of Mathematics and Statistics, Vol. 4, Issue 1 · 31 Mar 2008 · 7,417 accessesView PDFCite
Research ArticleOpen accessIn the author namesRadiation Measurement from Mobile Base Stations at a University Campus in MalaysiaMd. Rafiqul Islam, Othman O. Khalifa, Liakot Ali et al.The tremendous growth of telecommunication industry results the number of hand phone users increases everyday. In order to support the growing number of users, the mobile base stations can be seen in almost everywhere. This scenario has created uncomfortable feelings to the people that they may be affected by the radiations from antennas. A measurement was done at student hostels … …American Journal of Applied Sciences, Vol. 3, Issue 4 · 30 Aug 2006 · 7,292 accessesView PDFCite