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TRUST REGION-PARTICLE SWARM FOR MULTI-OBJECTIVE ENGINEERING COMPONENT DESIGN PROBLEMS
Mohammed Abd El-Rahman El-Shorbagy,Ahmed El-Sawy,Zeinab Hendawy
Journal of Global Research in Mathematical Archives , 2013,
Abstract: In this paper, we apply a proposed approach for solving multi-objective engineering design problem (MOEDP) with multiple objectives. In the proposed approach, a reference point based multi-objective optimization (MOO) using a combination between trust region (TR) algorithm and particle swarm optimization (PSO). The integration of TR and PSO has improved the quality of the founded solutions, also it guarantee the faster converge to the Pareto optimal solution. TR has provided the initial set (close to the Pareto set as possible) followed by PSO to improve the quality of the solutions and get all the points on the Pareto frontier. Detailed numerical results on three different MOEDP are reported to demonstrate the effectiveness and advantages of the proposed algorithm for solving practical MOEDP.
Enhanced Particle Swarm Optimization Based Local Search for Reactive Power Compensation Problem  [PDF]
Abd Allah A. Mousa, Mohamed A. El-Shorbagy
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.330184
Abstract: This paper presents an enhanced Particle Swarm Optimization (PSO) algorithm applied to the reactive power compensation (RPC) problem. It is based on the combination of Genetic Algorithm (GA) and PSO. Our approach integrates the merits of both genetic algorithms (GAs) and particle swarm optimization (PSO) and it has two characteristic features. Firstly, the algorithm is initialized by a set of a random particle which traveling through the search space, during this travel an evolution of these particles is performed by a hybrid PSO with GA to get approximate no dominated solution. Secondly, to improve the solution quality, dynamic version of pattern search technique is implemented as neighborhood search engine where it intends to explore the less-crowded area in the current archive to possibly obtain more nondominated solutions. The proposed approach is carried out on the standard IEEE 30-bus 6-generator test system. The results demonstrate the capabilities of the proposed approach to generate true and well-distributed Pareto optimal nondominated solutions of the multiobjective RPC.
A Note on the Paper “Generalized -Contraction for a Pair of Mappings on Cone Metric Spaces”  [PDF]
Mohamed Abd El-Rahman Ahmed
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.21002
Abstract: We note that Theorem 2.3 [1] is a consequence of the same theorem for one map.
Some Notes on the Paper “New Common Fixed Point Theorems for Maps on Cone Metric Spaces”  [PDF]
Mohamed Abd El-Rahman Ahmed
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2013, DOI: 10.4236/ijmnta.2013.22019
Abstract:

In this paper, we show that Theorem 2.1 [1] (resp. Theorem 2.2 [1]) is a consequence of Corollary 2.1 [1] ( resp. Corollary 2.2 [1]).

Reishi Mushroom Attenuates Hepatic Inflammation and Fibrosis Induced by Irradiation Enhanced Carbon Tetrachloride in Rat Model  [PDF]
Omama E. El Shawi, Sahar S. Abd El-Rahman, Marwa Abd El Hameed
Journal of Biosciences and Medicines (JBM) , 2015, DOI: 10.4236/jbm.2015.310004
Abstract: This work was undertaken to establish a new experimental model of hepatic fibrosis by gamma irradiation and CCl4 and to study the hepatoprotective effect of Reishi Mushroom (RM) against hepatic fibrosis induced in that model. Our results revealed that oral co-administration of 110 mg/kg RM by gavage to fibrotic rats offered an obvious hepatic protection as assured by the significant decrement in ALT and AST, HP content, MDA and NO levels with elevation of the antioxidant enzymes activities. The levels of TGF-β, TNF-α, HO-1 and type-1 collagen and their m-RNA expression were markedly declined as compared with those of fibrotic rats. Microscopical examination revealed that the exposure of rats to radiation aggravated the effect of CCl4 causing extensive collagen deposition and marked pseudolobulation of the hepatic parenchyma indicative of bridging fibrosis. While, oral co-administration of RM obviously improved the state of steatosis and apparently suppressed hepatic fibrogenesis.
Natural radioactivity levels and radiation hazards for gypsum materials used in Egypt  [PDF]
Ahmed Hassan Korna, Soad Saad Fares, Magda Abd El-Rahman
Natural Science (NS) , 2014, DOI: 10.4236/ns.2014.61002
Abstract:

Radionuclides naturally occurring in building materials may significantly contribute to the annual doses to the public. For instance, familiar building materials such as the concrete and gypsum board have been reported to produce a dose of about 0.04 mSv per year for a typical person (NCRP 1987c). External as well as internal exposures are two pathways of radiation dose imparted to human beings from the building materials. As information on the radioactivity of such materials is lacking, the study of gypsum materials used in Egypt was carried out in order to estimate the annual dose to the Egyptian population due to natural radionuclides in building materials. During the study, 18 samples of commonly used gypsum raw materials were collected and measured. The activity concentrations were determined by gamma ray spectrometry. Their mean values were in the ranges of 499.29 ± 11.53 Bq·kg-1 for 40K, 91.97 ± 2.61 Bq·kg-1 for 226Ra, 37.62 ± 1.67 Bq·kg-1 for 238U and 42.27 ± 2.22 Bq·kg-1 for 232Th. The activity indexed Iγ for 18, different gypsum samples varied from 0.31 ± 0.03 to 2.3 ± 0.19 and the radium equivalent activity (Raeq), from 38.81 ± 1.68 to 324.7 ± 9.42. These values are lower than the limit of 370 Bq·kg-1 adopted by the Organization for Economic Cooperation and Development (OECD). The average indoor annual effective gamma dose rate (DE) in (mSv/y) for the people, caused by the building materials of dwellings, was assessed for most commonly gypsum materials. It was estimated to be in the range from 0.10 ± 0.003 mSv/y to 0.74 ± 0.08 mSv/y. The internal and external hazard indices (Hin, Hex) and the absorbed dose rate in air D in each sample were evaluated to assess the radiation hazard for people living in dwelling made of the studied materials. The absorbed dose rate of indoor air in samples G1, G2, G11, G17 and G18 is less than the international recommended value which is 55 nGyh-1. While the absorbed dose rate for samples G3, G4, G5, G6, G7, G8, G9, G10, G12, G13, G14, G15 and G16 is higher than 55 nGyh-1, these samples are not acceptable for use as building materials.

Properties of Titanium Oxynitride Prepared by RF Plasma  [PDF]
Fayez M. El-Hossary, Niemat Z. Negm, Ahmed M. Abd El-Rahman, Mohamed Raaif, Alzahraa A. Abd Elmula
Advances in Chemical Engineering and Science (ACES) , 2015, DOI: 10.4236/aces.2015.51001
Abstract: Titanium oxynitrides combine the properties of metallic oxides and nitrides. In this presentation, titanium was oxynitrided using inductively coupled RF plasma in a gas mixture containing 80% N2 and 20% O2. The effect of plasma-processing power from 350 up to 550 W on microstructure, mechanical, tribological, wettability and electrochemical properties of the oxynitrided titanium was examined using different characterizations and testing techniques. The results demonstrated the formation of TiO, TiO2 rutile phase, TiNxOy and Ti2N as a result of plasma oxynitriding. The micro-hardness of the oxynitrided layers increases up to 766 HV0.1 as the plasma-processing power increases up to 550 W. The wear and corrosion resistance are improved for oxynitrided titanium in comparison with untreated samples. Moreover, the friction coefficient decreases from nearly 0.75 for the pure titanium to nearly 0.3 for oxynitrided titanium. The obtained data show an increase of surface energy and wettability of titanium oxynitride as the plasma power increases. The formation of hard oxide and oxynitride phases and the transformation of TiO2 from anatase to rutile structure at relatively high temperature are the main reasons for the good physical and electrochemical properties of titanium oxynitride.
High-sensitivity C-reactive protein as a marker of cardiovascular risk in obese children and adolescents  [PDF]
Hatem Hamed El-shorbagy, Ibraheim Abdel-aziz Ghoname
Health (Health) , 2010, DOI: 10.4236/health.2010.29158
Abstract: Background and aim of the work: High-sensiti- vity C-reactive protein (hsCRP) is a marker of low grade inflammatory state, which characterises an atherosclerotic process. The metabolic syndrome is associated with insulin resistance and a systemic low-grade inflammatory state. These disorders may arise at a very early age in obese children. We aimed to assess the utility of (hsCRP) as a marker of cardiovascular risk in obese children and adolescents. Patients and methods: This study was conducted on 100 obese child and adolescents (6-16 years). 50 apparently healthy children of matched age and sex served as control. All patients and controls were subjected to: 1-complete history taking. 2-anthropometric measurements and clinical examination including body height, weight, waist circumference, body mass index and blood pressure. 3-laboratory investigations in- cluding fasting glucose, lipid profile, apolipoprotiens and (hsCRP) were assessed. Metabolic syndrome patients had to meet three out of five criteria: concentration of triglycerides (TG) ≥ 110 mg/dL, high density lipoprotein cholesterol (HDL- C) ≤ 40 mg/dL, waist circumference ≥ 90th percentile, glucose concentration ≥ 110 mg/dL, and systolic or diastolic blood pressure ≥ 90th percentile. Results, height, weight BMI and blood pressure were significantly higher in the obese than the control. Obese group had significantly higher (hsCRP) levels than control group, (p < 0.01) and significantly higher LDL-C, triglyceride (TG), and lower HDL-C than the control group. Log (hsCRP) showed a positive correlation with BMI (p < 0.001), blood pressure, and TG. The pre- valence of the metabolic syndrome was 24%. Mean concentrations of (hsCRP) were higher among patients who had the metabolic syndrome. Among whom, 35% had a concentration of (hsCRP) > 3.0 mg/L, a concentration considered to place adults at high risk for cardiovascular disease. In multiple logistic regression analysis only abdominal obesity was significantly associated with (hsCRP). Conclusion: me- tabolic syndrome and abdominal obesity among our patients predispose to cardiovascular disease later in life through early low grade inflammation. (hsCRP) is one of the inflammatory markers that can be easily estimated in these patients.
Evaluation the Efficiency of Some Egyptian Wheat Triticum aestivum L. Cultivars to Zn Deficiency through Peroxidase Activity and Protein Profile Techniques
Zeinab Abd El-Rahman SALAMA,Mohamed M. EL FOULY
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 2008,
Abstract: Zinc (Zn) is an essential micronutrient for plants. The ability of plants to maintain significant yields under low zinc is called Zn efficiency (ZE). Eleven wheat (Triticum aestivum L.) (Banisuef 1, Gemiza 10, Gemiza 7, Giza 170, Giza 168, Sohag 3, Sids 7, Sids 5, Sids 1, Sakha 94, and Sakha 93) cultivars were grown under controlled environmental conditions in nutrient solution for 30 days to study the effect of varied supply of Zn (0 and 1 microM) on shoots, root dry production, shoot and root Zn efficiency, peroxidase activity. Also the peroxidase isozyme and protein on gel electrophoresis were investigated. Among all wheat cultivars Banisuef 1, Sohag 3 and Sakha 93 were less affected by Zn deficiency. Banisuef 1 showed the lowest value for shoot/root ratio under Zn deficiency. Peroxidase activity increased in Sohage 3 and Sakha 93. A new polypeptide with molecular weight 34 Kda was expressed in Banisuef 1, Gemiza 10, Gemiza 7 and Giza -170 under Zn deficiency. It can be concluded based on the experimental results that, for assessing wheat cultivars for resistance to Zn deficiency the POD enzyme activity together with protein profile could be considered as a better reliable techniques to select the resistance cultivars for zinc deficiency stress.
TRUST REGION-PARTICLE SWARM FOR MULTI-OBJECTIVE ENGINEERING COMPONENT DESIGN PROBLEMS
Mohamed A. El-Shorbagy
Journal of Global Research in Mathematical Archives , 2013,
Abstract: In this paper, we apply a proposed approach for solving multi-objective engineering design problem (MOEDP) with multiple objectives. In the proposed approach, a reference point based multi-objective optimization (MOO) using a combination between trust region (TR) algorithm and particle swarm optimization (PSO). The integration of TR and PSO has improved the quality of the founded solutions, also it guarantees the faster converge to the Pareto optimal solution. TR has provided the initial set (close to the Pareto set as possible) followed by PSO to improve the quality of the solutions and get all the points on the Pareto frontier. Detailed numerical results on three different MOEDP are reported to demonstrate the effectiveness and advantages of the proposed algorithm for solving practical MOEDP. Keywords: Multi-objective engineering design problem; trust region; particle swarm optimization;
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