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Articles by Abdul Waheed
Total Records ( 3 ) for Abdul Waheed
  Abdul Waheed
  This paper studies the network traffic of a campus network in a developing country that lacks several key properties of network infrastructure, which are often taken for granted elsewhere. Infrastructure limitations involve lack of high bandwidth connections to the Internet high latency satellite links to the Internet, and limited bandwidth shared by a growing number of academic and commercial users. In addition to these limitations, security requirements make it mandatory that all traffic should flow through a proxy. We study this traffic at the edge of this campus network using proxy server logs over one month (Feb. 2002). Our study indicates that the WWW traffic characteristics generally follow well- known heavy tailed distributions with only a couple of exception. Our analysis also indicates that majority of traffic if destined to remote locations, resulting in excessive latency.
  Rubina Mazhar , Sikander Ali , Ikram-ul-haq and Abdul Waheed
  The present study was conducted on the optimization of cultural conditions for the production of citric acid by mutant strain of Aspergillus niger NG-110 by using shake flask technique. Different cultural conditions such as alcohol (1% methanol) and calcium chloride (2%) were optimized for enhanced citric biosynthesis. The results showed that maximum amount of anhydrous citric acid (81.21 ± 0.2 gl -1) was obtained after 168 h inoculation, with a sugar consumption of 92.20 ± 3.5 gl -1. The dry weight of mycelia was 20.40 ± 0.2 gl -1. On the basis of comparison of kinetic parameters namely the product and growth yield coefficients (Yp/s, Yp/x), volumetric rates (Qp) and specific rate constants (qp), the mutant strain of Aspergillus niger NG-110 was a faster growing organism and had the ability to hyper produce citric acid.
  Waqar Ahmad Awan , Noor Badshah and Abdul Waheed
  The research on planting of various sizes of nodal tea cuttings (single and double) on different timings viz. June 20, July 20, August 20, September 20 and October 20, 1998 was carried out at the National Tea Research Institute, Shinkiari, District Mansehra (NWFP) in 1998-99. Planting of cuttings on June 20, 1998 significantly increased the percent survival (94.0%), shoot length (8.75 cm), number of branches (1.90), number of leaves (7.50), in contrast to minimum values for all parameters recorded (49.50%, 3.53 cm, 1.08, 2.0, respectively) by planting the nodal cuttings on October 20, 1998. Significant maximum values for all parameters were obtained in single nodal cuttings when planted on June 20, followed by July 20, 1998.
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