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Search Results: 1 - 10 of 18526 matches for " Ali Zedan "
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Solution of ()-Dimensional Nonlinear Cubic Schrodinger Equation by Differential Transform Method
Hassan A. Zedan,M. Ali Alghamdi
Mathematical Problems in Engineering , 2012, DOI: 10.1155/2012/531823
Abstract: Four-dimensional differential transform method has been introduced and fundamental theorems have been defined for the first time. Moreover, as an application of four-dimensional differential transform, exact solutions of nonlinear system of partial differential equations have been investigated. The results of the present method are compared very well with analytical solution of the system. Differential transform method can easily be applied to linear or nonlinear problems and reduces the size of computational work. With this method, exact solutions may be obtained without any need of cumbersome work, and it is a useful tool for analytical and numerical solutions.
Toxicity of Hypofractionated Radiotherapy Following Breast Conservative Surgery in Breast Cancer  [PDF]
Aiat Morsy, Sara H. Hammouda, Samir Shehata, Ali Zedan
Journal of Cancer Therapy (JCT) , 2019, DOI: 10.4236/jct.2019.105031
Abstract: Background:Adjuvant radiotherapy has increased disease-free and overall survival rates in breast cancer. Conventionally fractionated radiotherapy delivers 50 Gy over 5 weeks which is the standard approach. A shorter duration of hypofractionated radiotherapy (HFRT) will be more convenient for patients and treatment providers if found safe and equally effective. Material and Methods: Fifty-four breast cancer patients who underwent breast conservative surgery (BCS) were enrolled in this study. The patients received 4005 cGy/15 fractions. A boost to the tumor bed was administered in all patients. In this study, radiotherapy induced toxicity was evaluated. Results: In this study, the median age of our patients was 48 years with age ranged from 28 to 69 years. Acute skin toxicity was assessed, and it was noted that grade 2 skin toxicity was shown in only 6 patients (11.1%) at the end of radiotherapy and disappeared after 6 weeks of treatment. Late skin toxicity (telangectasia
Intersphincteric Resection Is the Optimal Procedure for Very Low Rectal Cancer: Techniques, Morbidity, Oncologic and Functional Outcomes  [PDF]
Ali Zedan, Anwar Tawfik, Ebrahim Aboeleupn, Asmaa Salah, Aiat Morsy
Journal of Cancer Therapy (JCT) , 2019, DOI: 10.4236/jct.2019.105033
Abstract: Background: The intersphincteric resection the most extreme form of a sphincter-preserving alternative for the abdominoperineal resection. Aim of the Work: We investigated oncological, functional outcomes and morbidity after ISR. Methods: This retrospective study included 164 patients who underwent ISR with between 2010 and 2015, Male 56.1%, Female 43.9%, with a median age was 54.5 years, Median follow-up time was of 48 months, Average surgical time was 230 min, Median blood loss was 700 mL and median hospital stay was nine days. Mean tumour size was34 mm. The surgical procedure through a laparotomy (72.6%), laparoscopically (27.4%). Neoadjuvant radiotherapy 89.6% {long-course radiotherapy 74.4%, short-course radiotherapy 15.2%}, neoadjuvant chemotherapy 28.7% and adjuvant chemotherapy 70.1%. Colonic J-pouch 16.5%, Transverse coloplasty 15.9%, a side-to-end anastomosis 26.8% and straight coloanal anastomosis 40.9%. Partial-ISR 36.6%, subtotal-ISR 37.2%, total-ISR 26.2%, diverting ileostomy 6.7%.
A Logical Treatment of Non-Termination and Program Behaviour  [PDF]
Martin Ward, Hussein Zedan
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.77051
Abstract:

Can the semantics of a program be represented as a single formula? We show that one formula is insufficient to handle assertions, refinement or slicing, while two formulae are sufficient: A (S) , defining non-termination, and B (S), defining behaviour. Any two formulae A and B will define a corresponding program. Refinement is defined as implication between these formulae.

Applications of the New Compound Riccati Equations Rational Expansion Method and Fan's Subequation Method for the Davey-Stewartson Equations
Zedan Hassan
Boundary Value Problems , 2010,
Abstract: We used what we called extended Fan's sub-equation method and a new compound Riccati equations rational expansion method to construct the exact travelling wave solutions of the Davey-Stewartson (DS) equations. The basic idea of the proposed extended Fan's subequation method is to take fulls advantage of the general elliptic equations, involving five parameters, which have many new solutions and whose degeneracies lead to special subequations involving three parameters like Riccati equation, first-kind elliptic equation, auxiliary ordinary equation and generalized Riccati equation. Many new exact solutions of the Davey-Stewartson (DS) equations including more general soliton solutions, triangular solutions, and double-periodic solutions are constructed by symbolic computation.
Applications of the New Compound Riccati Equations Rational Expansion Method and Fan's Subequation Method for the Davey-Stewartson Equations
Hassan Zedan
Boundary Value Problems , 2010, DOI: 10.1155/2010/915721
Abstract: We used what we called extended Fan's sub-equation method and a new compound Riccati equations rational expansion method to construct the exact travelling wave solutions of the Davey-Stewartson (DS) equations. The basic idea of the proposed extended Fan's subequation method is to take fulls advantage of the general elliptic equations, involving five parameters, which have many new solutions and whose degeneracies lead to special subequations involving three parameters like Riccati equation, first-kind elliptic equation, auxiliary ordinary equation and generalized Riccati equation. Many new exact solutions of the Davey-Stewartson (DS) equations including more general soliton solutions, triangular solutions, and double-periodic solutions are constructed by symbolic computation.
Analysis of FAME for two species of earthworms Allolobophora caliginosa Savigny and Pheretima hawayana Rosa (Annelida-Oligochaeta)
Hossam El-Din Mohamed Omar,Zedan Z. Ibraheim,Nasser A. El-Shimy,Rouwaida S. Ali
Journal of Biology and Earth Sciences , 2012,
Abstract: Analysis of fatty acid (FA) is one of the most commonly used tools for investigating microbial populations in ecological studies. Fatty acids can be extracted and esterified to form fatty acid methyl esters (FAME) when analyzed using gas chromatography–mass spectrometry, the resulting profile contains some microbial biomarkers. The aim of the present study to analysis FAME present in two species of earthworms exhibit the same environment. The thin layer chromatography of earthworm Allolobophora caliginosa Savigny showed three major spots corresponding to FAME while that of earthworm Pheretima hawayana Rosa showed two major spots. The GC-MS analysis of Allolobophora caliginosa Savigny extract showed the presence of at least 23 peaks, only two peaks were identified from their Rt and Ms spectrum, hexadecanoic acid methyl ester and octadecenoic acid methyl ester. While the chromatogram of Pheretima hawayana Rosa extract showed at least 20 peaks, five of them were identified; butanedioic acid dimethyl ester, pentadecanoic acid 14-methyl ester, 2-hydroxy-hexadecanoic acid methyl ester, 9-octadecenoic acid methyl ester and octadecanoic acid methyl ester. In conclusion, in spite of the two species of earthworms from the same environment, but their content of FAME was different and that may explain why the biological activity of the whole body extract was different.
Anti-inflammatory, antipyretic and antioxidant activities of the earthworms extract
Hossam El-Din Mohamed Omar,Zedan Z. Ibraheim,Nasser A. El-Shimy,Rouwaida S. Ali
Journal of Biology and Earth Sciences , 2012,
Abstract: Introduction: Earthworms are the major biomass in soil. They have been widely used in traditional Chinese medicine for a long time. However, in the past few decades with the development of biochemical technologies the research on the pharmaceutical effects of earthworms has been commencement.Aims: Experiments were conducted to recognize the therapeutic properties such as anti-inflammatory, antipyretic and antioxidant activities of biologically active extract isolated from two species of earthworm (Pheretima hawayana Rosa and Allolobophora caliginosa Savigny).Materials and methods: inflammation in the hind paw of albino rat, Rattus rattus, was induced by histamine, pyrexia was induced by Escherichia coli in rats and liver damage was induced by injection of rats with CCl4. Anti-inflammatory drug - indomethacin, anti-pyretic drug - paracetamol and antioxidant drug - silymarin plus were used as standard drug for comparison.Results: Administration of Eearthworms extract (100 mg/kg) and indomethacin (10 mg/kg), paracetamol (150 mg/kg), silymarin plus (150 mg/kg) as standard drugs reduced and restored to normal the changes that induced by histamine, Escherichia coli and CCl4 in rats.Conclusions: The present study conclude that both extract of earthworms gave result as anti-inflammatory and anti-pyretic similar to the standard drugs. The extract of the two species showed various responds as antioxidants against CCl4 induced hepatotoxicity.
New approach for tanh and extended-tanh methods with applications on Hirota-Satsuma equations
Zedan, Hassan A.;
Computational & Applied Mathematics , 2009,
Abstract: in this work, we establish new exact solutions for the hirota-satsuma equations. new approach for the tanh is used and extended tanh methods to construct traveling wave solutions in terms of a hyperbolic tangent functions. new families of solitary wave solutions and periodic solutions are also obtained for hirota-satsuma equations. our approach is reduce the size of the computational adopted in other techniques without any conditions to apply on any system of partial differential equations.
New approach for tanh and extended-tanh methods with applications on Hirota-Satsuma equations
Hassan A. Zedan
Computational and Applied Mathematics , 2009,
Abstract: In this work, we establish new exact solutions for the Hirota-Satsuma equations. New approach for the tanh is used and extended tanh methods to construct traveling wave solutions in terms of a hyperbolic tangent functions. New families of solitary wave solutions and periodic solutions are also obtained for Hirota-Satsuma equations. Our approach is reduce the size of the computational adopted in other techniques without any conditions to apply on any system of partial differential equations.
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