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World Journal of Nuclear Science and Technology 2012年第3期2卷 65-72页

作者： Mohamed Abd-Elzaher Mohamed Salem Badawi ahmed El-Khatib abouzeid ahmed thabet Department of Basic and Applied Science Faculty of Engineering Arab Academy for Science Technology and Maritime Transport Alexandria Egypt Physics Department Faculty of Science Alexandria University Alexandria Egypt

In this work we calibrated the NaI(Tl) scintillation detectors (5.08 × 5.08 cm2 and 7.62 × 7.62 cm2) and the Full Energy Peak Efficiency (FEPE) for these detectors have been calculated for point sources placed at different positions on the detector axis using the analytical approach of the effective solid angle ratio. This approach is based on the direct mathematical method reported by Selim and Abbas [1,2] and has been used successfully before to calibrate the cylindrical, parallelepiped, and 4π NaI(Tl) detectors by using point, plane and volumetric sources. In addition, the present method is free of some major inconveniences of the conventional methods.

关键词： Full Energy Peak Efficiency NaI(Tl) Scintillation Efficiency Transfer

Determination of Full Energy Peak Efficiency of NaI(Tl) Detector Depending on Efficiency Transfer Principle for Conversion Form Experimental Values

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Unique Solution of Integral Equations via Intuitionistic Extended Fuzzy b-Metric-Like Spaces

World Journal of Nuclear Science and Technology 2012年第3期

作者： Mohamed Abd-Elzaher Mohamed Salem Badawi ahmed El-Khatib abouzeid ahmed thabet

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Computer Modeling in Engineering & Sciences 2023年第4期135卷 109-131页

作者： Naeem Saleem Khalil Javed Fahim Uddin Umar Ishtiaq Khalil ahmed thabet Abdeljawad Manar A.Alqudah Department of Mathematics University of Management and TechnologyLahore54770Pakistan Department of Math&Stats International Islamic University IslamabadIslamabad44000Pakistan Abdus Salam School of Mathematical Sciences Government College UniversityLahore54600Pakistan Office of Research Innovation and CommercializationUniversity of Management and TechnologyLahore54770Pakistan Department of Mathematics and Sciences Prince Sultan UniversityRiyadh11586Saudi Arabia Department of Medical Research China Medical UniversityTaichung40402Taiwan Department of Mathematical Sciences Faculty of SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh11671Saudi Arabia

In this manuscript,our goal is to introduce the notion of intuitionistic extended fuzzy b-metric-like *** establish some fixed point theorems in this ***,we plot some graphs of an example of obtained result for better *** use the concepts of continuous triangular norms and continuous triangular conorms in an intuitionistic fuzzy metric-like *** norms are used to generalize with the probability distribution of triangle inequality in metric space *** conorms are known as dual operations of triangular *** obtained results boost the approaches of existing ones in the literature and are supported by some examples and applications.

关键词： Fixed point extended fuzzy b-metric like space intuitionistic extended fuzzy b-metric-like space integral equation

Utilizing melt crystallization fundamentals in the development of a new tabletting technology

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Frontiers of Chemical Science and Engineering 2014年第3期8卷 346-352页

作者： ahmed abouzeid Sandra PETERSEN Joachim ULRICH Martin Luther University Halle-Wittenberg Center for Engineering Science Thermal Process Engineering D-06099 Halle Germany

Increasing production effeciency and lowering costs are some of the many advantages melt crystallization technology offers over the conventional methodology of tabletting. A normal tablet consists of a pure shell or a coat and a separate core constituting the pharmaceutical active ingredient. Great emphasis is put on the purity of the shell since its purpose is to solely protect and deliver the active ingredient to its target. Melt crystallization is a purification （separation） process. It is discussed here for its ability to produce coated tablets, by separating the ＂coating＂ material from the ＂to be coated＂ material coming from one molten mixture. Molten drops of lutrol-ibuprofen mixture are produced using the drop forming technique. The subsequent analysis involves proving and quantifying the phase separation （coat purity）. The mechanism of a crystallizing drop is shown as direct evidence of the ongoing process. Moreover, solidified tablet batches are analyzed for the purity of their coating by measuring the ibuprofen concentration. This optimization process is carried out through multiple stages of development and condition enhancements in order to produce the most pure tablet coating. As a result, a trial showing an almost purely coated tablet is presented here.

关键词： phase separation melt crystallization tablets,process optimization

Assessment of dielectric strength and partial discharges patterns in nanocomposites insulation of single-core power cables

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Journal of Advanced Dielectrics 2021年第4期11卷 64-73页

作者： ahmed thabet M.Fouad Nanotechnology Research Center Electrical Engineering Dept.Faculty of Energy Engineering Aswan University AswanEgypt Electrical Engineering Dept.College of Engineering and Information Technology Buraydah Colleges KSA Hydro Power Plant Generation Company Nag Hammadi Hydro Power Plant QenaEgypt

Nanoparticles succeeded to enhance the dielectric properties of industrial insulation but the presence of voids inside the power cable insulation still leads to formation high electrical stress inside power cable insulation material and *** this paper,the dielectric strength of new design nanocomposites has been deduced as experimental work done to clarify the benefit of filling nanoparticles with different patterns inside ***,it has been studied the effect of electrical stress distribution in presence of air,water and copper impurities with different shapes(cylinder,sphere and ellipse)inside insulation of single *** simulation model,it has been used finite element method(FEM)for estimating the electrostatic field distribution in power cable *** has been applied new strategies of nanotechnology techniques for designing innovative polyvinyl chloride insula-tion materials by using nanocomposites and ***,this research succeeded to remedy different partial discharges(PD)patterns according to using certain types and concentrations of nanoparticles.

关键词： Partial discharges dielectric strength single core cables FEM nanocomposites nanoparticles

Papanicolaou smear interpretation with progestin-only hormonal birth control methods

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Journal of Reproduction and Contraception 2016年第1期27卷 25-40页

作者： Ziad Sami abouzeid ahmed Samy EL-AGWANY Department of Obstetrics and Gynecology Faculty of Medicine Alexandria University

Objective To define the relationship between the use of progestogen-only contracep- tion and the occurrence of abnormal cervical cytology and cervical intraepithelial lesion. Methods The present study was designed as a case-control study including 200 progestogen-only contraceptive （POC） users recruited as cases （group A） and 50 women who were non-hormonal contraceptive users as a control group （group B）. Positive Papanicolau （Pap） smear was reported in cervical cell abnormalities from atypical squamous cell of undetermined significance （ASCUS） to invasive cancer. Pap smear was evaluated according to the Bethesda system classification 2001. Cases with posi- tive Pap smears were subjected to visual inspection of the cervix with 5.0% acetic acid （VIA test） and punch biopsy. Results Statistical analysis of Pap smear results in this study showed epithelial cell abnormalities in 44 cases （22.0%） in group A and 9 cases （18.0%） in group B showing no statistically significant difference （P〉O. 05）. ASCUS abnormality was reported in 31 cases （15.5%） of group A and 6 cases of group B （12.0%）. Low-grade squamous intraepithelial lesion （LSIL） was found in 11 cases （5.5%） and 3 cases （6.0%） of group A and group B, respectively. High-grade squamous intraepithelial lesion （HSIL） was found in 2 cases （1.0%） of group A and none of group B. The incidence of abnormal Pap smears in group A did not greatly vary between different methods of POCs. Among Depo medroxyprogesterone acetate （DMPA） users, ASCUS was found in 17 cases （16.8%）, LSIL was found in 11 cases （10.8%） and HSIL was found in 2 cases （1.9%）. While in progesterone-only pills （POPs） users and Implanon~ users, ASCUS was found in 10 cases （12.8%） and 4 cases （20.0%） respectively with no higher epithelial abnormalities found. Levonorgestrel intrauterine device （LNG-IUD） was used by 1 case in group A and was not associated with Pap smear abnormality. Cases with ASCUS abnormality were followed up by repeated Pap smear after 3 mont

关键词： progesterone cancer cervix Papanicolau (Pap) smear

Sol-Gel γ-Al₂O₃ Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

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Journal of Encapsulation and Adsorption Sciences 2016年第3期6卷 70-90页

作者： Mohamed S. thabet ahmed M. Ismaiel Department of Chemistry Faculty of Science Al-Azhar University Cairo Egypt Department of Chemistry Faculty of Science Jazan University Jazan Saudi Arabia

The adsorption behavior of eosin yellow (EY) from aqueous solution onto γ-Al2O3 nanoparticles in batch technique was studied. γ-Al2O3 NPs was prepared and characterized by SEM, TEM, XRD and FTIR analysis. The effect of pH, dosage of adsorbent, contact time, temperature, and the initial concentration of dye was investigated. The maximum amount of dye removal found about 99.36% at pH4, the adsorption dose 1g/L, with the initial dye concentration of 100 mg/L, and the temperature of 25°C, with contact time 120 min. The adsorption behavior of the eosin yellow dye is applicable to Langmuir isotherm model, with the maximum sorption capacity of 47.78 mg/g of γ-Al2O3. The kinetic data also described by the pseudo-second-order model with a correlation coefficient (0.9999), and the mechanism of the process showed a multi-linear steps and the intra-particle diffusion was not only rate controlling step. The adsorption process was endothermic with positive enthalpy of 121.8 kJ/mol, and showed spontaneous process with a mean free energy -5.19 kJ/mol, and increase randomness, 369.77 J/mol. k, at the adsorbent solution interface. The adsorption process was chemisorption in nature The activation energy estimated from Arrhenius and modified Arrhenius is 40.9 kJ/mol, 106.37 kJ/mol respectively. The sticking probability of EY onto Al2O3 NPs very high estimated from the value of S* < 1, (4.82E-19).

关键词： Eosin Y Adsorption Nanoparticles Aluminum Oxide Thermodynamic Parameters Kinetics

Systematic Review and Meta-Analysis of the Palatal Surgeries in the Treatment of Obstructive Sleep Apnea

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International Journal of Otolaryngology and Head & Neck Surgery 2021年第2期10卷 61-74页

作者： Amr Nabil Rabie Ossama Mady ahmed Negm El-Shazly Alaa abouzeid Department of Otolaryngology/Head and Neck Surgery Faculty of Medicine Ain Shams University Cairo Egypt Department of Otolaryngology/Head and Neck Surgery Misr University for Science and Technology Cairo Egypt

Background: This paper aims to examine published articles between January 2008 and January 2019 on the different palatal surgeries performed on OSA patients and the treatment outcomes, which in turn will be used to determine the effectiveness of various palatal surgical techniques in treating OSAS and the most effective of the palatal surgical techniques in treating OSAS. Patients and Methods: The current review followed the guidelines of preferred reporting items for systematic reviews and meta-analysis statement 2009 (PRISMA). The quality of relevant studies was assessed using NIH quality assessment tool for observational cohort and cross-sectional studies as well as NIH tool for quality assessment for case series studies. Results: Meta-analyses of relevant studies showed that the surgical technique that achieved the best reduction on AHI (Apnea/Hypopnea Index) was the lateral pharyngoplasty followed by the Anterior Palatoplasty, with a significant mean reduction of [(SMD = −0.848, 95% CI (−1.209 - −0.487), p-value < 0.001) and (SMD = −0.864, 95% CI (−1.234 - −0.494), p-value < 0.001), respectively]. The technique responsible for the best improvement in Epworth Sleepiness Score (ESS) was the Relocation Pharyngoplasty, with a significant mean reduction of [SMD = −0.998, 95% CI (−1.253 - −0.743), p-value < 0.001]. Minimal O2 saturation level improved most with the Expansion Sphincter Pharyngoplasty, with a significant mean reduction of [SMD = 1.011, 95% CI (0.581 - 1.440), p-value < 0.001]. The surgical procedure that results in the best post-operative Visual Analogue Scale (VAS) was Z-Palatoplasty, with a significant mean reduction of [SMD = −1.551, 95% CI (−2.049 - −1.052), p-value < 0.001]. Soft palate length changes with a significant mean reduction of [SMD = −2.219, 95% CI (−2.730 - −1.708), p-value < 0.001]. Finally, meta-analyses of relevant studies showed that expansion sphincter pharyngoplasty achieved the

关键词： Obstructive Sleep Apnea Palatal Surgery ESS AHI VAS Oxygen Saturation Meta-Analysis Systematic Review

Knowledge and Attitude of Pregnant Women toward Elective Cesarean Section in Saudi Arabia

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Open Journal of Nursing 2019年第2期9卷 199-208页

作者： Afaf Abdul-Jabar Al Sulamy Shadia A. Yousuf Hala ahmed thabet Department of Maternity and Child Nursing Faculty of Nursing King Abdulaziz University Jeddah Saudi Arabia Department of Primary Health Nursing Faculty of Nursing Jeddah Saudi Arabia Woman’s Health and Midwifery Nursing Department Faculty of Nursing Mansoura University Mansoura Egypt

Background: The rate of deliveries by cesarean section (CS) is increasing worldwide. An elective cesarean section (ECS) is a cesarean section carried with or without a medical reason, in some cases choice by pregnant women. The number of women demanding for delivery by elective cesarean section is increasing in Saudi Arabia. Although CS is the commonest major surgery performed in Obstetrics throughout the world;there are still concerns about the knowledge and attitude of Saudi Pregnant women towards it. Methods: The design of this study was a quantitative, descriptive, and cross-sectional design. The study sample consisted of 206 pregnant women attending antenatal clinic during the third trimester, selected by convenience sampling method from Maternity and Children Hospital in Jeddah City in Saudi Arabia. Structured interview questionnaire was used in this study. Different statistical procedures were used for data analysis including percentages, mean, and mean percentages. Content validity and reliability were done. Results: The majorities (78.2%) of the pregnant women have adequate level of knowledge about ECS, 14.6% of them have moderate knowledge, and only 7.3% have inadequate knowledge. Also, 137 (66.5%) of pregnant women have negative attitude toward ECS, while 58 (28.2%) have positive attitude. Conclusion and recommendations: The study concluded that there was a good level of knowledge among pregnant women about ECS in most of the instrument questions in general;except in some areas such as the bad consequences of CS. On the other hand, the majority of the pregnant women had negative attitude toward ECS. Health care provider such as doctors, nurses and midwives should provide adequate knowledge to the pregnant women about consequence of cesarean section on the mother and child. Various interventions are recommended to decline unnecessary cesarean section. These interventions need to contain changes in attitude and correcting misperceptions among pregnant women

关键词： Knowledge Attitude Elective Cesarean Section

Endoscopic Third Ventriculostomy versus Ventriculo-Peritoneal Shunt for Infant Hydrocephalus

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Open Journal of Modern Neurosurgery 2020年第2期10卷 193-202页

作者： Khaled Ismail Abdel-Aziz Radwan Nouby Mahmoud ahmed thabet Mohammad Fekry Elshirbiny Department of Neurosurgery Faculty of Medicine Aswan University Aswan Egypt Department of Neurosurgery Faculty of Medicine Assiut University Assiut Egypt

Introduction: Patients with hydrocephalus, which is the most pediatric neurological disorder, undergo Cerebrospinal fluid (CSF) diversion through third ventriculostomy or ventriculo-peritoneal shunt. Up to date, the optimal hydrocephalus treatment modality is not clear. Aim: We compared the outcome of endoscopic third ventriculostomy (ETV) versus ventriculo-peritoneal shunt (VP shunt) as a second surgical intervention in management of Infant hydrocephalus concerning success rate and complications. Patients and Methods: We conducted an observational study of 52 children with hydrocephalus (congenital or acquired) in whom CSF diversion was performed using either ETV or VP shunt in randomized control trial. Results: During the period examined, 52 children, 26 underwent ETV and 26 underwent VP shunt. The mean age was 11.0 ± 4.3 months in ETV and 11.3 ± 4.7 months in VP shunt. Postoperative infection in the ETV group was lower than in the VP shunt group (23.1% vs. 53.8% P = 0.045). Regarding operating time, In ETV group operation duration was 46.9 min and 64.3 min in the V-P shunt group (P = 0.13). There was no statistically significant difference between the two study groups regarding the rate of obstruction, change in occipital frontal circumference (OFC) or the need of revision surgery. One year survival for VP shunt group vs. ETV group was 46.2% vs. 65.4% respectively. Conclusion: ETV associated with lower rates of postoperative infection and shorter operation time with no significant difference in rates of obstruction, change in OFC and revision surgery in comparison to VP shunt.

关键词： ETV VPS Pediatric Hydrocephalus