Prevalence of Eosinophilic Esophagitis in Adult Patients with Upper Gastrointestinal Symptoms in a Locality in Upper Egypt

Magdy Fouad,Yasser Mahrous Fouad,Hamdy Ahmed Mokareb,Dalia Mohammed Abdel-Rehim 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.4

Background/Aims: Eosinophilic esophagitis (EoE) is gaining importance in the diagnosis of upper gastrointestinal (UGI) symptoms. Diagnosis is based on the clinical presentation of esophageal dysfunction and pathological findings in the absence of other causes oftissue eosinophilia. Our study was designed to evaluate EoE prevalence in patients with UGI symptoms in our locality (El-Minia, Egypt). Methods: This single-center, cross-sectional study recruited all patients with UGI symptoms who agreed for endoscopic evaluation. Esophageal biopsy samples were obtained and histological evaluation for the presence of eosinophils was performed for every patient. EoE was defined when at least 15 eosinophils were present in a single high-power field, in the absence of other causes of esophagealeosinophilia. Results: Between 2013 and 2015, 218 of 476 adult patients with UGI symptoms underwent upper endoscopy after giving consent. Amongthe 218 patients, only 4 (1.87%) had the diagnosis of EoE based on the presence of eosinophils in esophageal biopsies and exclusion ofother causes of esophageal eosinophilia. Three patients with EoE presented mainly with dysphagia (75%) and/or other UGI symptoms,such as heartburn. Conclusions: We observed a low prevalence of EoE in our locality. The diagnosis of EoE should be considered in patients withdysphagia and/or heartburn.

Review Of Some Cryptographic Algorithms In Cloud Computing

Alharbi, Mawaddah Fouad,Aldosari, Fahd,Alharbi, Nawaf Fouad International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.9

Cloud computing is one of the most expanding technologies nowadays; it offers many benefits that make it more cost-effective and more reliable in the business. This paper highlights the various benefits of cloud computing and discusses different cryptography algorithms being used to secure communications in cloud computing environments. Moreover, this thesis aims to propose some improvements to enhance the security and safety of cloud computing technologies.

Buckling analysis of isotropic and orthotropic plates using a novel four variable refined plate theory

Fouad Bourada,Khaled Amara,Abdelouahed Tounsi 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.21 No.6

The current research presents a buckling analysis of isotropic and orthotropic plates by proposing a new four variable refined plate theory. Contrary to the existing higher order shear deformation theories (HSDT) and the first shear deformation theory (FSDT), the proposed model uses a new displacement field which incorporates undetermined integral terms and involves only four variables. The governing equations for buckling analysis are deduced by utilizing the principle of virtual works. The analytical solution of a simply supported rectangular plate under the axial loading has been determined via the Navier method. Numerical investigations are performed by using the proposed model and the obtained results are compared with CPT solutions, FSDT solutions, and the existing exact solutions in the literature. It can be concluded that the developed four variable refined plate theory, which does not use shear correction coefficient, is not only simple but also comparable to the FSDT.

Hygro-thermo-mechanical bending analysis of FGM plates using a new HSDT

Fouad Boukhelf,Mohamed Bachir Bouiadjra,Mohammed Bouremana,Abdelouahed Tounsi 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.21 No.1

In this paper, a novel higher-order shear deformation theory (HSDT) is proposed for the analysis of the hygro-thermo-mechanical behavior of functionally graded (FG) plates resting on elastic foundations. The developed model uses a novel kinematic by considering undetermined integral terms and only four variables are used in this model. The governing equations are deduced based on the principle of virtual work and the number of unknown functions involved is reduced to only four, which is less than the first shear deformation theory (FSDT) and others HSDTs. The Navier-type exact solutions for static analysis of simply supported FG plates subjected to hygro-thermo-mechanical loads are presented. The accuracy and efficiency of the present model is validated by comparing it with various available solutions in the literature. The influences of material properties, temperature, moisture, plate aspect ratio, side-to-thickness ratios and elastic coefficients parameters on deflections and stresses of FG plates are also investigated.

Nutritional Factors Affecting Abdominal Fat Deposition in Poultry: A Review

Fouad, A.M.,El-Senousey, H.K. Asian Australasian Association of Animal Productio 2014 Animal Bioscience Vol.27 No.7

The major goals of the poultry industry are to increase the carcass yield and to reduce carcass fatness, mainly the abdominal fat pad. The increase in poultry meat consumption has guided the selection process toward fast-growing broilers with a reduced feed conversion ratio. Intensive selection has led to great improvements in economic traits such as body weight gain, feed efficiency, and breast yield to meet the demands of consumers, but modern commercial chickens exhibit excessive fat accumulation in the abdomen area. However, dietary composition and feeding strategies may offer practical and efficient solutions for reducing body fat deposition in modern poultry strains. Thus, the regulation of lipid metabolism to reduce the abdominal fat content based on dietary composition and feeding strategy, as well as elucidating their effects on the key enzymes associated with lipid metabolism, could facilitate the production of lean meat and help to understand the fat-lowering effects of diet and different feeding strategies.

Distribution of Agrobacterium tumefaciens Biovars in Jordan and Variation of Virulence

Fouad Al-Momani,Sami Albasheer,Ismail Saadoun 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.4

recovered from 68 samples (51 plant tumor and 17 soil) that were collected from different habitats in Northern Jordan. The isolated cultures were grouped into 3 biovars based on their biochemical characteristics and biovar I, II, and III comprised a total number of 46, 41, and 22 isolates, respectively. Isolates of biovar I were obtained primarily from the diseased peach, oak and rose plants, whereas isolates of biovar II and III were obtained mostly from apple and grape plants, respectively. Twenty-nine isolates were found to be virulent to at least one of the tested hosts such as carrots, chickpeas, garden peas and tomato plants with a response of tumor formation or tumor with roots induction. Our result suggested that A. tumefaciens strains from tumor of various plants and soil of Jordan were diverse and they have a variation in their virulence.

Analysis of a Magneto Hydrodynamic Second-Grade Fluid in a Porous Medium with Temperature Dependent Thermal Conductivity

Fouad Mallawi,Tasawar Abbas,Munazza Saeed,Bilal Ahmad,Taseer Muhammad 한국자기학회 2024 Journal of Magnetics Vol.29 No.1

The heat and mass transfer effects on steady two-dimensional magneto hydrodynamic flow of second-grade fluid is carried out in this study. Mathematical formulations for nonlinear flows over stretching surface in the presence of magnetic field, temperature dependent thermal conductivity, porous medium and convective boundary are carried out in Cartesian coordinate system. The model equations are determined by using fundamental laws of fluid mechanics. The governing PDEs for second-grade fluid have been derived and then transfigured into a system of nonlinear coupled ODEs via appropriate similarity transformation. The BVP is then solved by an efficient numerical scheme known as Runge Kutta Fehlberg method along with shooting technique. The outcomes are presented graphically and tabulated with the aim of illustrating the physical impacts of governing parameters on the temperature, concentration, and velocity profiles. Greater Prandtl numbers result in a decrease in temperature, while higher values of thermal conductivity and coefficient of internal heat absorption all result in an increase in temperature. Further, comparison of the results with published literature for limited cases show the validity of numerical technique.

The Effect of a High Temperature Superconducting Patch on a Rectangular Microstrip Antenna

Fouad Chebbara,Mounir Amir,Tarek Fortaki 대한전기학회 2009 Journal of Electrical Engineering & Technology Vol.4 No.2

The complex resonant frequency problem of a superconductor patch is formulated in terms of an integral equation which is the kernel of a dyadic Green’s function. To include the effect of the superconductivity of the microstrip patch, the surface complex impedance of the superconductor film is introduced using the two fluids model of Gorter and Casimir. The Galerkin procedure is used in the resolution of the electric field integral equation. Numerical results concerning the effect of the operating temperature of a superconductor patch on the characteristics of the antenna are presented.

Ductility-based design approach of tall buildings under wind loads

Fouad Elezaby,Ashraf El Damatty 한국풍공학회 2020 Wind and Structures, An International Journal (WAS Vol.31 No.2

The wind design of buildings is typically based on strength provisions under ultimate loads. This is unlike the ductility-based approach used in seismic design, which allows inelastic actions to take place in the structure under extreme seismic events. This research investigates the application of a similar concept in wind engineering. In seismic design, the elastic forces resulting from an extreme event of high return period are reduced by a load reduction factor chosen by the designer and accordingly a certain ductility capacity needs to be achieved by the structure. Two reasons have triggered the investigation of this ductility-based concept under wind loads. Firstly, there is a trend in the design codes to increase the return period used in wind design approaching the large return period used in seismic design. Secondly, the structure always possesses a certain level of ductility that the wind design does not benefit from. Many technical issues arise when applying a ductility-based approach under wind loads. The use of reduced design loads will lead to the design of a more flexible structure with larger natural periods. While this might be beneficial for seismic response, it is not necessarily the case for the wind response, where increasing the flexibility is expected to increase the fluctuating response. This particular issue is examined by considering a case study of a sixty-five-story high-rise building previously tested at the Boundary Layer Wind Tunnel Laboratory at the University of Western Ontario using a pressure model. A three-dimensional finite element model is developed for the building. The wind pressures from the tested rigid model are applied to the finite element model and a time history dynamic analysis is conducted. The time history variation of the straining actions on various structure elements of the building are evaluated and decomposed into mean, background and fluctuating components. A reduction factor is applied to the fluctuating components and a modified time history response of the straining actions is calculated. The building components are redesigned under this set of reduced straining actions and its fundamental period is then evaluated. A new set of loads is calculated based on the modified period and is compared to the set of loads associated with the original structure. This is followed by non-linear static pushover analysis conducted individually on each shear wall module after redesigning these walls. The ductility demand of shear walls with reduced cross sections is assessed to justify the application of the load reduction factor “R”.

Thermal buckling resistance of simply supported FGM plates with parabolic-concave thickness variation

Fouad Benlahcen,Khalil Belakhdar,Mohammed Sellami,Abdelouahed Tounsi 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.29 No.5

This research presents an investigation on the thermal buckling resistance of FGM plates having parabolic-concave thickness variation exposed to uniform and gradient temperature change. An analytical formulation is derived and the governing differential equation of thermal stability is solved numerically using finite difference method. A specific function of thickness variation is introduced where it controls the parabolic variation intensity of the thickness without changing the original material volume. The results indicated that the loss ratio in buckling resistance is the same for any gradient temperature profile. Influencing geometrical and material parameters on the loss ratio in the thermal resistance buckling are investigated which may help in design guidelines of such complex structures.