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Articles by H. Ibrahim
Total Records ( 7 ) for H. Ibrahim
  A. Modarresi , A. Mamat , H. Ibrahim and N. Mustapha
  In social system, people with similar interests gather and create a community. This structure organizes people effectively and makes sharing information easier. In sociology the behavior of such structures has been investigated for a long time. Fortunately this structure can be extended to Peer-to-Peer (P2P) systems. This is due to the fact that peers in P2P systems usually have few interests like people in the real world and they try to find other peers with similar interests. On the other hand, the structure of the underlying models in P2P has a direct effect on different aspect of such systems. In this study the performance related parameters of a P2P system with social network characteristics are measured by simulation. The result shows that using similar structure as same as real world inside a community produces better performance. In addition, flooding technique in such systems creates higher traffic than random structured model; however a simple controlled flooding can provide a satisfaction result.
  A. Modarresi , A. Mamat , H. Ibrahim and N. Mustapha
  The complexity of Peer-to-Peer (P2P) systems makes their analytical evaluation complicated. To conquer this problem, simulation studies are usually used to evaluate such systems. However, evolution of P2P systems, from simply a Gnutella-like network to advanced overlays, makes their comparison difficult in a similar condition. Using different inputs, outputs and datasets is the main cause of this problem. On the other hand, network simulators cannot be used for such systems because of high scalability and dynamicity of P2P systems. Most network simulators can simulate few nodes in high detail without considering dynamicity of systems. In this study, a generic model, parameters and datasets are presented and used to design a flow-based P2P simulator with the capability of implementing different P2P protocols to simplify the evaluation of P2P systems. Then, the behavior of a semantic social overlay P2P system is investigated and compared with two various types of overlays, namely random and interest-based systems to show the applicability of the simulator. Although three different types of overlays have been chosen, the generic model and selected parameters used in the proposed simulator provide a uniform environment to evaluate and compare different types of overlays in similar conditions.
  T.M. San , J. Vejayan , K. Shanmugan and H. Ibrahim
  The study was carried out to screen antimicrobial activity in venoms obtained from 11 species of snakes that are all common in Malaysia. Snake venom, which constitutes a diverse range of proteins, has long been identified as a potential source of therapeutics. Therefore, in times when antimicrobial resistance is becoming an increasingly severe issue, it is unsurprising that snake venoms are being investigated for antimicrobial components. Antibacterial activity was assessed using the hole-plate method. Venoms of Calloselasma rhodostoma and Ophiophagus hannah were capable of producing the most prominent bacterial inhibition zones with maximum values as high as 12 mm, while the other venoms screened only produced bacterial inhibition zones that were not more than 10 mm. These two venoms were selected for further determination of Minimum Inhibitory Concentration (MIC). The MIC values were tested with Staphylococcus aureus ATCC25923, ATCC29213 and ATCC43300. The MIC values obtained for Calloselasma rhodostoma were 125 μg mL-1 when tested against S. aureus ATCC25923 and ATCC43300, while it was 250 μg mL-1 when tested against S. aureus ATCC29213. MIC values obtained for Ophiophagus hannah were 250 μg mL-1 when tested against all three strains. Since the potential of snake venoms for antimicrobial activity has been established, further study is in the progress to purify the active antimicrobial component and to screen a wider range of bacterial strains.
  H. Ibrahim , F.S. Sani , B.H. Danladi and A.A. Ahmadu
  The leaves of Hymenocardia acida are commonly used in Northern Nigeria alone or in combination with other plant parts to manage sickle cell disease. Phytochemical screening and antisickling studies were carried out. The phytochemical screening revealed the presence of carbohydrates, tannins, flavonoids, saponins, alkaloids, cardiac glycosides, resins, steroids and terpenes. The leaves ethanol extracts at 0.5, 1.0 and 2.0% w/v were observed to reverse sickled human Red Blood Cells (RBC) using microscopic technique. The antisickling activity was found to be dose dependent. The fractions containing flavonoids, saponins and carboxylic acids were found to be responsible for reversal of the sickled RBC. Therefore, the use of the plant by the traditional medical practitioners in the treatment of sickle cell anaemic patients is justified.
  H. Ibrahim , M. Bello and H. Ibrahim
  The study determined the food security status of farming households as well as an optimal farm plan that can enhance the food security status of farming households in Nasarawa State. Data was collected from 180 farming households using random sampling. A food security line and linear programming model were used for data analysis. Majority of the farming households (58.9%) were food insecure. The optimal farm plan recommends the production of Cassava, Maize/Cowpea, and Benniseed and Groundnut/Yam enterprises at 0.64, 0.34, 0.35 and 0.22 ha respectively to yield a net return of 141692.89 Naira. The major food security crops were identified to be Maize, Cassava and Yam. It was concluded that an effective allocation of resources can enhance the food security status of farming households. The study recommends the encouragement of the production of Cassava, Yam and Maize and the introduction of participatory family planning techniques among the food insecure households.
  H. Ibrahim , N.R. Uba-Eze , S.O. Oyewole and E.G. Onuk
  Urban areas are faced with the problem of increasing population and consequently inadequate supply of food items. Many urban households and individuals in Nigeria merely eat for Survival. This study was therefore designed to assess the state of food security among urban households in the Federal Capital Territory of Nigeria. Simple random sampling technique was used to select 120 respondents from the study area. Data were analyzed using simple descriptive statistics and Food Security Scale. The results revealed that 70% of the urban households in the study area are food secure, while only 30% are non food secure. The major coping strategies against food shortages were the purchase of less preferred food and reduction in the quantity of meals. The study recommends that efforts at reducing food insecurity among urban households should focus on increasing urban household income and food supply.
  A.O. Olorunsanya , O.O. Egbewande , H. Ibrahim and M.M. Adeyemo
  One hundred day old broiler chicks were used for this study. They were fed on a conventional broiler starter feed for the first seven days after which they were randomly allotted into five treatment groups of twenty birds with ten birds per replicate. A seven week trial was conducted to investigate the nutritive value of Toasted Albizia lebbeck Seed Meal (TASM) on the birds. The test material was included at dietary levels of 0, 5, 10, 15 and 20%. At the end of the trial, three birds were randomly selected per replicate, starved overnight, bled through jugular vein, de-feathered and eviscerated. Average feed intake, weight gain, feed conversion efficiency and mortality showed significant (p<0.05) difference. However, at 0 and 5% dietary levels, there was no significant (p>0.05) difference in the performance characteristics. The carcass parameters showed that 0 and 5% TASM dietary levels were significantly (p<0.05) higher than other treatments in all the parameters assessed. The above showed that the birds were able to tolerate TASM up to 5% level of inclusion, but beyond this, overall performances, carcass characteristics and mortality were affected.
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