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Articles by M.M. Salama
Total Records ( 3 ) for M.M. Salama
  M.M. Salama , E.E. Taher and M.M. El. Bahy
  Molluscicidal activity of Thymus capitatus and Marrubium vulgare essential oils on adult and eggs of Biomphalaria alexandrina as well as on different stages of Culex pipiens was evaluated for their effectiveness on vector control. Steam distillation of essential oils of the flowering aerial parts of both Thymus capitatus L. and Marrubium vulgare L. yielded 0.5 and 0.2%, respectively. Results of GC/MS analyses of the two samples revealed an identified components in both oils amounted to 96.27 and 90.19% of the total oil composition for T. capitatus and M. vulgare, respectively. The two oil samples appeared dominated by the oxygenated constituents (88.22 and 57.50% for T. capitatus and M. vulgare, respectively). These were mainly composed of phenols among which carvacrol (32.98%) and thymol (32.82%) were the major constituents in T. capitatus oil while in M. vulgare oil, thymol (34.55%) was the major constituent. Borneol was present only in T. capitatus oil (9.15%). T. capitatus essential oil gave LC50 and LC90 mortality against adult snails at 200 and 400 ppm/3 h, respectively while that of M. vulgare was 50 and 100 ppm/3 h, respectively. On the other hand, M. vulgare showed LC100 ovicidal activity at 200 ppm/24 h while T. capitatus oil showed no ovicidal activity. Insecticidal activity of both two essential oils revealed LC50 and LC90 larvicidal activity at 100 and 200 ppm/12 h, respectively and LC50 and LC90 pupicidal activity at 200 and 400 ppm/12 h, respectively. Results of this study suggest that plant essential oils may have a promising role in vector control with needed continuing investigations.
  W.M. Mansour , M.M. Salama , S.M. Abdelmaksoud and H.A. Henry
  Economic Load Dispatch (ELD) problem is one of the most important problems to be solved in the operation and planning of a power system. The main objective of the economic load dispatch problem is to determine the optimal schedule of output powers of all generating units so as to meet the required load demand at minimum operating cost while satisfying system equality and inequality constraints. This study presents an application of Genetic Algorithm (GA) for solving the ELD problem to find the global or near global optimum dispatch solution. The proposed approach has been evaluated on 26-bus, 6-unit system with considering the generator constraints, ramp rate limits and transmission line losses. The obtained results of the proposed method are compared with those obtained from the Conventional Lambda Iteration Method and Particle Swarm Optimization (PSO) Technique. The results show that the proposed approach is feasible and efficient.
  M.M. Salama , M.I. Elgazar , S.M. Abdelmaksoud and H.A. Henry
  In this study, a Genetic Algorithm (GA) and particle swarm optimization with constriction factor (CFPSO) are proposed for solving the short term variable head hydrothermal scheduling problem with transmission line losses. The performance efficiency of the proposed techniques is demonstrated on hydrothermal test system comprising of two thermal units and two hydro power plants. The simulation results obtained from the constriction factor based particle swarm optimization technique are compared with the outcomes obtained from the genetic algorithm to reveal the validity and verify the feasibility of the proposed methods. The test results show that the particle swarm optimization give the same solution as obtained by genetic algorithm but the computation time of the constriction factor particle swarm optimization technique is less than genetic algorithm.
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