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Search Results: 1 - 10 of 462698 matches for " Adel A. A. Elgammal "
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Adaptive Fuzzy Sliding Mode Controller for Grid Interface Ocean Wave Energy Conversion  [PDF]
Adel A. A. Elgammal
Journal of Intelligent Learning Systems and Applications (JILSA) , 2014, DOI: 10.4236/jilsa.2014.62006
Abstract:

This paper presents a closed-loop vector control structure based on adaptive Fuzzy Logic Sliding Mode Controller (FL-SMC) for a grid-connected Wave Energy Conversion System (WECS) driven Self-Excited Induction Generator (SEIG). The aim of the developed control method is to automatically tune and optimize the scaling factors and the membership functions of the Fuzzy Logic Controllers (FLC) using Multi-Objective Genetic Algorithms (MOGA) and Multi-Objective Particle Swarm Optimization (MOPSO). Two Pulse Width Modulated voltage source PWM converters with a carrier-based Sinusoidal PWM modulation for both Generator- and Grid-side converters have been connected back to back between the generator terminals and utility grid via common DC link. The indirect vector control scheme is implemented to maintain balance between generated power and power supplied to the grid and maintain the terminal voltage of the generator and the DC bus voltage constant for variable rotor speed and load. Simulation study has been carried out using the MATLAB/Simulink environment to verify the robustness of the power electronics converters and the effectiveness of proposed control method under steady state and transient conditions and also machine parameters mismatches. The proposed control scheme has improved the voltage regulation and the transient performance of the wave energy scheme over a wide range of operating conditions.

Polymorphism of Human Organic Cationic Transporter1 (C480G) in Egyptian Chronic Myeloid Leukemia Patients on Imatinib  [PDF]
Nahla A. M. Hamed, Hashim Neanea, Amal M. Ghanem, Maha M. A. Elgammal, Yasmen Samir
American Journal of Molecular Biology (AJMB) , 2018, DOI: 10.4236/ajmb.2018.82007
Abstract: Background: Human organic cationic transporter1 (Hoct1) is a plasma membrane transporter responsible for the main influx of Imatinib into chronic myeloid leukemia (CML) cells. Single nucleotide polymorphisms (SNPs) in the gene coding for hOCT1 are important factors causing Imatinib resistance. We investigated the frequency of hOCT1 SNP C480G among Egyptian CML patients and its relation to early molecular response as an indicator of treatment outcome. Materials and Methods: Two groups of CML patients were included in this study. Group I consisted of 25 patients responding to Imatinib treatment (Imatinib responsive) and group II consisted of 25 patients resistant to Imatinib (Imatinib resistant). Response criteria were assessed according to the NCCN (National Comprehensive Cancer Network) guidelines 2017. Twenty healthy controls of matched age and sex were also included (group III). For all patients, we studied hOCT1 C480G at initial presentation using Taqman drug metabolism genotyping as well as BCR-ABL percent at diagnosis and after 3 months interval. Results: hOCT1 C480G was present in 32% of studied CML patients. CC (wild) was detected in 68% of group I and 64% of group II. CG (mutant heterozygous) was present in 28% of group I and 36% of group II while GG (mutant homozygous) was detected in only one case in group I. CG was also detected in 15% of control subjects There was no significant difference between hOCT1 C480G polymorphism and Early Molecular Response (χ2 = 0.089, p =
Time Domain of Sommerfelds Problem of Lossy Half-Space  [PDF]
Adel A. S. Abo Seliem, Fathia Alseroury
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2013, DOI: 10.4236/jemaa.2013.53021
Abstract:

This paper solved the problem of the scattering of radiation from a material half-space by the transient spectral domain method. The transient spectral domain method is a general theoretical approach for the exact solution to the time-dependent source radiation in the presence of media. It is located in the air region in the vicinity of lossy half-space. The apply of the integral transform to the wave equation in the horizontal coordinates in space by a two-dimensional Fourier transform is theoretical formulation of the problem. A source used is an electrically short vertical magnetic dipole with Impulse current distribution in the domain. Leads, under consideration of initial boundary and transition condition, the form expressions is achieved in terms of spectral domain variable and time. The integral representation determines the electromagnetic field anywhere the closed-form expressions is an achieved in terms of spectral domain variable and time.

Effectiveness of Three Bio-Rational Products and a Traditional Insecticide against Thrips spp. and Bemisia tabaci Attacking Tomato Fields in Kafr El-Sheik Governorate, Egypt  [PDF]
Hala Adel, Saad A. Gaffar, Ahmed Toman
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.912108
Abstract: Destructive effects of conventional insecticides on environment have created a necessity to introduce bio-rational products in pest control programs. Effectiveness of bio-pesticide (Beauvaria bassiana), natural oil (anti-insect), a botanical extract (nimbecidine) and malathion insecticide was evaluated against Thrips spp. and Bemisia tabaci attacking tomato in Kafr El Sheik, Egypt. The trial was conducted during two successive seasons; 2017-18 in a total area of 4912 m2 cultivated with tomato cultivar zero 42. The experiment was set up in a randomized complete block design with five replications for each treatment. Yellow sticky traps were used to monitor population of both pests before and after spraying, in addition, their numbers on plants were counted. Results revealed that highest control rates of both pests were recorded after the fourth day of each spraying. Long inter-applications periods decreased effectiveness and the greatest control resulted when three consecutive sprayings were applied. Malathion achieved the highest suppression of both pests. Within the bio-rational pesticides, nimbecidine gave the greatest thrips control whereas products showed no significant difference for whiteflies. The study recommends those bio-rational compounds to join Integrated Pest Management programs of both pests in Egypt, taking into consideration spraying for 3 consecutive times with at least 5 days intervals.
Iron Depletion Improves Glycemic Control in Poorly Controlled Type 2 Diabetic Patients with Iron Overload and Negative Main HFE-Gene Mutations  [PDF]
Adel A. Mahmoud, Adel A. Elazab Elged, Rasha A. Elgamal, Abdelhady M. Hamada
Journal of Diabetes Mellitus (JDM) , 2015, DOI: 10.4236/jdm.2015.53020
Abstract: Iron overload increases the risk of diabetes via mechanisms of abnormal glucose metabolism: insulin deficiency, insulin resistance, and/or hepatic dysfunction. Iron reduction upregulates glucose uptake and improves hepatocytes insulin receptor activity. This study was conducted to examine the effects of iron depletion—via controlled phlebotomy—on the hypoglycemic treatment in poorly controlled type 2 diabetes mellitus (T2DM) patients with non-genetic iron overload. Forty three patients with poorly controlled T2DM and iron overload were divided into 2 groups: iron depletion group and control group. Regular phlebotomy was performed for iron depletion group on monthly basis until serum ferritin reached 20 μg/L or less. Both groups were examined and compared for blood pressure, serum ferritin, lipid profile, HFE-gene, HbA1c, HOMA-IR and number of medicines used for diabetic control. The results had revealed that group differences of HbA1c (-2.64, 95% CI -3.23 to 2.04, p < 0.001) and HOMA-IR (-0.68, 95% CI -0.98 to -
Surface Photometry and Dynamical Properties of Lenticular Galaxies: NGC3245 as Case Study  [PDF]
Mohamed Adel Sharaf, K. Mahmoud, E. Aly, A. A. Alshaery
International Journal of Astronomy and Astrophysics (IJAA) , 2012, DOI: 10.4236/ijaa.2012.21007
Abstract: In this paper, surface photometry and dynamical properties of Lenticular galaxies will be developed and applied to NGC3245. In this respect, we established new relation between the intensity distribution I and the semi-major axis a Moreover, some basic statistics of both independent and the dependent variables of the relation are also given. In addition to the I(a) relation , the Sérsic r1/n model is applied for the intensity profile I(r) resulting in an estimation of the effective radius, re, and the surface brightness it encloses, μe. Both relations (I(a) and I(r)) are accurate as judged by the precision criteria which are: the probable errors for the coefficients , the estimated variance of the fit and the Q value (the square distance between the exact solution and the least square estimated solution) where all very satisfactory. Correlation coefficients between some parameters of the isophotes are also computed. Finally as examples of applications of surface photometry we determined the dynamical properties: mass, density, potential distributions, as well as distributions of escape and circular speeds in terms of Sérsic model.
Enhancement in Mechanical Properties of Polystyrene Filled with Carbon Nano-Particulates (CNPS)  [PDF]
Ayman A. Aly, Moustafa M. Mahmoud, Adel A. Omar
World Journal of Nano Science and Engineering (WJNSE) , 2012, DOI: 10.4236/wjnse.2012.22013
Abstract: The idea of adding reinforcing materials, or fillers, to polymers has been around for many decades. The reason for the creation of polymer composite materials came about due of the need for materials with specific properties for specific applications. For example, composite materials are unique in their ability to allow brittle and ductile materials to become softer and stronger. It is expected that good tribological properties can be obtained for polymers filled with nano-scale fillers. A soft plastic can become harder and stronger by the addition of a light weight high stiffness material. In the present work, the effect of adding different percentages of carbon nano-particulates to polystyrene (PS) on the mechanical properties of nano-composites produced was investigated. Based on the experimental observations, it was found that as the percentage of the carbon nano-particulates (CNPS) increased hardness increased and consequently friction coefficient remarkably decreased.
NOS3 894G > T Gene Polymorphism: A Potential Risk Factor of Stroke in Bahraini Patients  [PDF]
Manal A. Fadl, Adel A. AlJishi, Safa Taha, Moiz Bakhiet
World Journal of Neuroscience (WJNS) , 2018, DOI: 10.4236/wjns.2018.81009
Abstract: The endothelial nitric oxide synthase (eNOS) encoded by the NOS3 gene is responsible for the synthesis of a vasoactive endothelium-derived nitric oxide (NO). The genetic polymorphism of this gene explains, in part, why some people are prone to develop stroke than others. In this study we conducted a case control study in Bahrainis to investigatefor the first time” the relationship between NOS3 894G > T (rs1799983) and 786T > C (rs2070744) polymorphisms with the stroke predisposition in Bahraini population. Detection of NOS3 polymorphism was performed by PCR RFLP genotyping method. The level of NO among cases and controls was measured using ELISA. A total of 93 unrelated stroke patients and 86 controls were included in the study. The three types of stroke; Ischemic, hemorrhagic and transient ischemic attack were reported (91.4%, 7.5% and 1.1% respectively). No significant gender difference was observed (P = 0.74). Having previous stroke was a highly significant risk factor of the disease (P = 0.001, OR = 1.4), where as a family history of stroke was not (OR = 0.11). The analysis provides evidence that the mutant 894GT + TT genotypes of NOS3 894G > T polymorphism were positively associated with stroke predisposition and it increased the risk of
Approximation Solution of Fractional Partial Differential Equations by Neural Networks
Adel A. S. Almarashi
Advances in Numerical Analysis , 2012, DOI: 10.1155/2012/912810
Abstract: Neural networks with radial basis functions method are used to solve a class of initial boundary value of fractional partial differential equations with variable coefficients on a finite domain. It takes the case where a left-handed or right-handed fractional spatial derivative may be present in the partial differential equations. Convergence of this method will be discussed in the paper. A numerical example using neural networks RBF method for a two-sided fractional PDE also will be presented and compared with other methods. 1. Introduction In this paper, I will use neural network method to solve the fractional partial differential equation (FPDE) of the form: On a finite domain , . Here, I consider the case , where the parameter is the fractional order (fractor) of the spatial derivative. The function is source/sink term [1]. The functions and may be interpreted as transport-related coefficients. We also assume an initial condition for and zero Dirichlet boundary conditions. For the case , the addition of classical advective term on the right-hand side of (1.1) does not impact the analysis performed in this paper and has been omitted to simplify the notation. The left-hand and right-hand fractional derivatives in (1.1) are the Riemann-Liouville fractional derivatives of order [5] defined by where is an integer such that . If is an integer, then the above definitions give the standard integer derivatives, that is When , and setting , (1.1) becomes the following classical parabolic PDE: Similarly, when and setting , (1.1) reduces to the following classical hyperbolic PDE: The case represents a superdiffusive process, where particles diffuse faster than the classical model (1.4) predicts. For some applications to physics and hydrology, see [2–4]. I also note that the left-handed fractional derivative of at a point depends on all function values to the left of the point , that is, this derivative is a weighted average of such function values. Similarly, the right-handed fractional derivative of at a point depends on all function values to the right of this point. In general, left-handed and right-handed derivatives are not equal unless is an even integer, in which case these derivatives become localized and equal. When is an odd integer, these derivatives become localized and opposite in sign. For more details on fractional derivative concepts and definitions, see [1, 3, 5, 6]. Reference [7] provides a more detailed treatment of the right-handed fractional derivatives as well as a substantial treatment of the left-handed fractional derivatives. Published
The reptile community of the Zaranik Protected Area, North Sinai, Egypt with special reference to their ecology and conservation
Adel A Ibrahim
Egyptian Journal of Natural History , 2001,
Abstract: Egyptian Journal of Natural History Vol.3 2001: 81-92
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