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Glassy phase and thermodynamics for random field Ising model on spherical lattice in magnetic field

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Chinese Physics B 2010年第10期19卷 525-533页

Phase diagram and thermodynamic parameters of the random field Ising model （RFIM） on spherical lattice are studied by using mean field theory. This lattice is placed in an external magnetic field （B）. The random field （hi） is assumed to be Gaussian distributed with zero mean and a variance （hi2） = HRF2. The free energy （F）, the magnetization （M） and the order parameter （q） are calculated. The ferromagnetic （FM） spin-glass （SG） phase transition is clearly observed. The critical temperature （Tc） is computed under a critical intensity of random field HRF = V/2/πJ. The phase transition from FM to paramagnetic （PM） occurs at TC = J/k in the absence of magnetic field. The critical temperature decreases as HRF increases in the phase boundary of FM-to-SG. The magnetic susceptibility （X） shows a sharp cusp at TC and the specific heat （C） has a singularity in small random field. The internal energy （U） has a similar behaviour to that obtained from the Monte Carlo simulation.

关键词： random field mean field theory magnetization specific heat and phase diagram

Hydromagnetic flow of a Cu water nanofluid past a moving wedge with viscous dissipation

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Chinese Physics B 2014年第4期23卷 365-372页

作者： A.M.Salem galal ismail Rania Fathy Department of Mathematics Faculty of Science and Arts Qassim University Department of Basic Science Faculty of Computers and Informatics Suez Canal University Department of Mathematics Faculty of Science Zagazig University

A numerical study is performed to investigate the flow and heat transfer at the surface of a permeable wedge immersed in a copper （Cu）-water-based nanofluid in the presence of magnetic field and viscous dissipation using a nanofluid model proposed by Tiwari and Das （Tiwari I K and Das M K 2007 Int. J. HeatMass Transfer 50 2002）. A similarity solution for the transformed governing equation is obtained, and those equations are solved by employing a numerical shooting technique with a fourth-order Runge-Kutta integration scheme. A comparison with previously published work is carried out and shows that they are in good agreement with each other. The effects of velocity ratio parameter ~, solid volume fraction tp, magnetic field M, viscous dissipation Ec, and suction parameter Fw on the fluid flow and heat transfer characteristics are discussed. The unique and dual solutions for self-similar equations of the flow and heat transfer are analyzed numerically. Moreover, the range of the velocity ratio parameter for which the solution exists increases in the presence of magnetic field and suction parameter.

关键词： nanofluid dual solution magnetic field viscous dissipation

The Influence of Eddy Diffusivity Variation on the Atmospheric Diffusion Equation

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Open Journal of Air Pollution 2015年第3期4卷 109-118页

作者： A. A. Marrouf Khaled S. M. Essa Maha S. El-Otaify Adel S. Mohamed galal ismail Department of Mathematics and Theoretical Physics Atomic Energy Authority Cairo Egypt Department of Mathematics Faculty of Science Zagazig University Zagazig Egypt

The advection diffusion equation was solved analytically using separation of variables technique, considering first the wind speed and eddy diffusivity as constants;second as variables dependent on vertical height z. ... 详细信息

关键词： Advection-Diffusion Equation Separation of Variable Technique Pollution Concentrations

Application of AVO attributes for gas channels identification, West offshore Nile Delta, Egypt

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Petroleum Research 2020年第2期5卷 112-123页

作者： Amir ismail Hatem Farouk Ewida Mohammad galal Al-Ibiary Aldo Zollo Department of Physics“E.Pancini” University of Naples‘Federico II’Italy Department of Geology Faculty of ScienceHelwan UniversityCairoEgypt Exploration General Manager PERENCO North Sinai Petroleum CompanyCairoEgypt

The offshore part of the Nile Delta is considered one of the most prolific provinces for gas production andfor future petroleum exploration. Amplitude Variation with Offset (AVO) analysis supported by composite logs considered as one of the best-advanced techniques enables the interpreter to understand theseismic data. It is used to generate a new view of the output results, especially for the identification of gaszones as gas channels by using pre-stack AVO attributes that based on the intercept product gradient(A*B) and the Scaled Poisson’s Ratio Change. Free gas, regardless of the percentage show obvious AVOanomaly. Well log data, including gamma-ray, resistivity, and Vp sonic logs are used in the seismic data towell tie and in the generation of the synthetic seismogram. Seismic data conditioning processes withcheck-shot correction is performed to improve the resolution of the reflection events and signal to noiseratio. AVO attributes technique, as a direct hydrocarbon indicator, including AVO gradient analysis andAVO crossplot separate the gas levels in the sand-shale sequences. The identified gas-bearing zonesconsistent with well log data responses. As the main conclusion, we show the visual evidence for the gasbearing zones by interpreting different AVO responses due to the changes in fluid and rock types.

关键词： AVO attributes Offshore Nile Delta Gas channels Gas bearing sand zones AVO crossplots

Identification of gas zones and chimneys using seismic attributes analysis at the Scarab field,offshore,Nile Delta,Egypt

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Petroleum Research 2020年第1期5卷 59-69页

作者： Amir ismail Hatem Farouk Ewida Mohammad galal Al-Ibiary Sergio Gammaldi Aldo Zollo Department of Physics“E.Pancini” University of Naples‘Federico Ⅱ’Italy Geology Department Faculty of ScienceHelwan UniversityCairoEgypt Exploration General Manager PERENCO North Sinai Petroleum CompanyCairoEgypt

Seismic attributes supported by composite logs are the best way that can enable the interpreter to understand seismic data very well and generate a new view of the output *** of the reservoir zone can be enhanced by analyzing wells log data based on Gamma-ray,Resistivity,and Vp sonic logs *** logs of Scarab-1,Scarab-De,Scarab-Da,Scarab-Dd,and Scarab-2 wells indicate the lateral and vertical variation of the gas reservoir in ElWastani ***,there are several seismic attributes that can be used to support reservoirs *** enhancement the detection of the hydrocarbon reservoirs,it is important to carefully analyze the 2D seismic data,which in this study will be primarily prepared to enhance seismic attributes results for the identification of gas chimneys,gas zones as channels,enhance stratigraphic and structural *** this article,we have performed data conditioning,quality control and seismic well ties including the preliminary wavelet extractions to get accurate ***,we have extracted of several classes of physical,geometrical and complex attributes as a direct hydrocarbon indicator to identify the gas zones,channels and chimneys and to identify the faults and *** main contribution of this work is to provide a more detailed seismic reflection image supported by several seismic attributes classes and well logs to show a visual and quantitative evidence to identify the gas channels and gas chimneys with improving the detection of the faults and discontinuities.

关键词： Seismic attributes Offshore nile delta Gas channels Gas bearing sand zones Gas chimney Well logging

Clinical diagnosis and surgical approaches of vaginal hyperplasia in bitches

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Asian pacific Journal of Reproduction 2018年第5期7卷 220-224页

作者： Samaa M galal Mohamed Fathi ismail ST ElBelely MS Faten F Mohamed Department of Theriogenoloy Faculty of Veterinary MedicineCairo UniversityEgypt Department of Pathology Faculty of Veterinary MedicineCairo UniversityEgypt

Objective:To describe the breed predisposition, clinical diagnosis, pathological findings and the surgical approach through excision of the hyperplasic mass from the ***:Twenty five bitches of different breeds suffering from a protruded mass from the vulva were examined clinically, blood samples were collected to ensure the phase of estrus that were determined by evaluating the exfoliative vaginal epithelium, and a histopathological examination of the hyperplastic mass was done after its surgical ***:The current work revealed that the maximum value of estradiol 17-B was in Alabai breed while the maximum value of progesterone was in Pit bull breed. And Pit bull breed showed cornification and stratification of the vaginal mucosa with abundant eosinophilic cytoplasm and regular round ***:As the vaginal hyperplasia is a crucial gynaecological problem that affects different breeds of bitches, the current work provides a comprehensive diagnosis of the case and illustrates the surgical interference for its excision.

关键词： Vaginal hyperplasia Histopathology Surgical approach Progestrone assay

Combination of Diclofenac Potassium and Propolis in the Therapy of Oral Aphthosis: A Randomized, Clinical, Double-Blind, Placebo-Controlled Study

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Open Journal of Stomatology 2023年第11期13卷 422-432页

作者： Mohamed ismail Assadawy Hisham Mohamed Abozaid Abdelraheem Ramadan Elgendy Abdelrahman Mohamed galal Department of Oral Medicine Periodontology Oral Diagnosis and Oral Radiology Faculty of Dental Medicine (Boys-Cairo) Al-Azhar University Cairo Egypt Department of Oral Biology Faculty of Dental Medicine (Boys-Cairo) Al-Azhar University Cairo Egypt

Background: Oral aphthosis has a negative impact on oral health. This study aimed to assess the effectiveness of gel formulation including diclofenac and propolis in the treatment of oral ulcers. Methods: Participants included 100 normal individuals with aphthous, excluding those having allergies to any ingredient in the diclofenac formulation. Patients were randomly assigned into two groups: one group received treatment with a combination of diclofenac potassium 3% (10 mg/g, 60 g) and propolis 5% gel (Group II), and the other group received a placebo (Group 1). The patient was evaluated using standard digital photographs and chronic oral mucosal questionnaires on days 1, 3, 5, and 7 after healing. Utilizing the Mann-Whitney U test, the two groups were compared. Each group’s changes were examined using Friedman’s test. Results: There was a statistically dramatic change over time in Group II. After one day, the median total score dropped statistically significantly, and from one to three days with effect size (d) 2.485, Group II demonstrated 48% complete healing and 52% partial healing, while Group I demonstrated 4% partial healing and 96% no change. Effect size (V): 0.995. Conclusions: The combination of diclofenac and propolis provided instant relief and an affordable new regimen for treating oral aphthosis.

关键词： Ulcer Biology Healing Inflammation Corticosteroids Propolis Diclofenac Potassium Oral Aphthosis