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Bach-Einstein Gravitational Field Equations as a Perturbation of Einstein Gravitational Field Equations

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4-Port Octagonal Shaped MIMO Antenna with Low Mutual Coupling for UWB Applications

Applied Mathematics（应用数学） 2022年第12期

作者： fathy ibrahim abdel-bassier Ahmed Fouad abdel-Wahab Fayrouz Mostafa abdel-Maboud

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1999-2015页

作者： Mahmoud A.abdelghany Mohamed fathy Abo Sree Arpan Desai Ahmed A.ibrahim Electrical Engineering Department College of EngineeringPrince Sattam bin Abdulaziz UniversityWadi Addwasir11991Saudi Arabia Electronic and Communication Department Arab Academy for ScienceTechnology and Maritime TransportCairo11865Egypt Department of Electronics and Communication Engineering CSPITCharotar University of Science and Technology(CHARUSAT)Changa388421India Electronics and Communications Engineering Department Minia UniversityEl-Minia61519Egypt

A4-port multiple-input multiple-output(MIMO)antenna exhibiting lowmutual coupling andUWBperformance is *** octagonal-shaped four-antenna elements are connected with a 50microstrip feed line that is arranged rotationally to achieve the orthogonal polarization for improving the MIMO system *** antenna has a wideband impedance bandwidth of 7.5GHz with S11<−10 dB from(103.44%)3.5–11GHz and inter-element isolation higher than 20 *** validation is carried out by verifying the simulated and measured results after fabricating the *** results in the form of omnidirectional radiation patterns,peak gain(≥4 dBi),and Envelope Correlation Coefficient(ECC)(≤0.01)are extracted to validate the suggested antenna ***,time-domain analysis was investigated to demonstrate the operation of the suggested antenna in wideband ***,the simulated and experimental outcomes have almost similar tendenciesmaking the antenna suitable for its use in UWBMIMOapplications.

关键词： MIMO antenna low mutual coupling time domain analysis UWB antenna

Comparative Study between Microscopic and Endoscopic Trans-Sphenoidal Surgery for Growth Hormone-Secreting Pituitary Adenomas with Super-Sellar Extension

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Open Journal of Modern Neurosurgery 2020年第4期10卷 393-402页

作者： Ahmed Sabry abdelkader ibrahim abdel Fattah Abou Alfotoh Shehab Mohammad fathy Eissa Neurosurgery Department Nasr City Hospital of Health Insurance Cairo Egypt Neurosurgery Department Faculty of Medicine Al-Azhar University Cairo Egypt

Background: Advances in the era of modern micro-neurosurgery enabled a reduction of surgical invasiveness and brain retraction which has been defined as minimally invasive or keyhole surgery. Sinonasal endoscopy has brought radical changes in the concepts of pathophysiology and treatment of sinonasal aliments as well as surgical techniques. Aim of the Study: To compare between the use of endoscopic and microscopic trans-sphenoidal approach in resection of growth hormone-secreting pituitary adenomas with Suprasellar Extension. Patients and Methods: This is a prospective study. It had been conducted upon 20 patients having growth hormone secreting pituitary adenoma admitted to Neurosurgery department in Alzar University hospitals and Nasr City Insurance hospital from 2015 to 2018, divided into 2 groups;group A (10 cases) underwent endoscopic endonasal trans-sphenoidal pituitary adenoma resection, while group B (10 cases) operated upon using the standard microscopic trans-sphenoidal pituitary adenoma resection. The inclusion criteria were included: All patients with growth hormone secreting pituitary adenomas showing manifestations of acromegaly, mass effect or hormonal disturbance. Results: This study showed that improvement in outcome was higher in endoscopic group opposed to microscopic group (100% vs. 71% improved headache, 80% vs. 60% visual improvement, 75% vs. 20% fundus improvement and 60% vs. 30% field improvement). Conclusion: We concluded that fully endoscopic procedure result in improved rates of complete tumor removal and a reduced incidence of complications, when compared to the microscopic approach.

关键词： Acromegaly Pituitary Adenomas Endoscopic Trans-Sphenoidal Surgery Microscopic Trans-Sphenoidal Surgery

New scope on the relationship between rotifers and Biom phalaria alexandrina snails

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Asian Pacific Journal of Tropical Biomedicine 2013年第8期3卷 595-603页

作者： Shereen Farouk Mossallam Eglal ibrahim Amer Iman fathy Abou-El-Naga Medical Parasitology Department Faculty of MedicineAlexandria UniversityEgypt

Objective:To investigate the effect of rotifer internalization into snail tissue on the development of ***:Susceptible laboratory-bred Biomphalaria alexandrina(***)snails were exposed to lab-maintained rotifers;Philodinaspp.,two weeks before and after being infected with Schistosoma mansoni(***)*** consequent histopathological impact on snail tissues and cercarial biology were investigated before and after emergence from ***:Contamination of *** with philodina,two weeks before miracidial exposure,was found to hinder the preliminary development of *** inside the snail ***,when snails were contaminated with rotifers two weeks post miracidial exposure;growth of already established cercariae was found to be *** consequent influence of internalized rotifers within the snail tissue was clearly reflected on cercarial em ergence,activity and infectivity along the four weeks duration of *** the present study,comparison of snail histopathological findings and altered cercarial biology observed between the experimental and control groups indicated that the rotifers may have affected the levels of snail's energy reservoirs,which eventually was found to have had an adverse impacton reproduction,growth and survival of the parasite within the snail host,coupled with its performance outside the ***:In future biological control strategies of schistosomiasis,ritifers should be considered as a parasitic scourge of humanity.

关键词： Biomphalaria alexandrina Schistosoma mansoni Rotifers Snail histopathology Cercarial biology

Could Dystonia Be Initial Presentation of Corpus Callosum Infarction in Young Age Patients? A Case Report Study

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Neuroscience & Medicine 2015年第2期6卷 62-64页

作者： Mohamed Hamdy ibrahim Alyaa Fadhil Sameh Saied Ali Salma fathy abdel Kader Mohamed Khalid Kiran Kumar Shivram Kumar Janhavi Sirsat Department of Neurology GMCH & RC Ajman United Arab Emirates Department of Clinical Pharmacology GMCH & RC Ajman United Arab Emirates Department of Radiology GMCH & RC Ajman United Arab Emirates Department of Internal Medicine GMCH & RC Ajman United Arab Emirates Gulf Medical University (GMU) Ajman United Arab Emirates

Focal dystonia in young aged patients is considered to be the uncommon clinical presentation, unless a secondary cause is to be considered. Infarcts of the corpus callosum are rare and have not been well documented previously. As for a variety of signs and symptoms due to corpus callosum lesion, focal dystonia can be easily overlooked. The case is approved by ethical committee and explained to the patient with patient approval.

关键词： Focal Dystonia Corpus Callosum Infarction Involuntary Movement

Case Report on Hiccup and Lateral Medullary Syndrome

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Neuroscience & Medicine 2015年第2期6卷 58-61页

作者： Mohamed Hamdy ibrahim Alyaa Fadhil Sameh Saied Ali Salma fathy abdel Kader Mohamed Khalid Kiran Kumar Shivram Kumar Janhavi Sirsat Department of Neurology GMCH & RC Ajman United Arab Emirates Department of Clinical Pharmacology GMCH & RC Ajman United Arab Emirates Department of Radiology GMCH & RC Ajman United Arab Emirates Department of Internal medicine GMCH & RC Ajman United Arab Emirates Gulf Medical University (GMU) Ajman United Arab Emirates

The case study is aimed at providing a more thorough analysis of a case of lateral medullary syn-drome presented only with persistent hiccup after eating lunch the study hopes to generate an interest for further studies into the topic and focuses on abnormal unusual presentations of lateral medullary syndrome. Ethical committee has approved this case after taking consent from the patient and explaining to him the importance of the case in clinical practice.

关键词： Hiccup Lateral Medullary Syndrome Stroke

Energy Management Control StraEnergy Management Control Strategy for Renewable Energy System Based on Spotted Hyena Optimizertegy for Renewable Energy System Based on Spotted Hyena Optimizer

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Computers, Materials & Continua 2021年第5期 2271-2281页

作者： Hegazy Rezk Ahmed fathy Mokhtar Aly Mohamed N.ibrahim College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityWadi Addawaser11991Saudi Arabia Electrical Engineering Department Faculty of EngineeringMinia UniversityMinia61111Egypt Electrical Engineering Department Faculty of EngineeringJouf UniversitySakakaSaudi Arabia Electrical Power and Machine Department Faculty of EngineeringZagazig UniversityZagazigEgypt Department of Electrical Engineering Aswan UniversityAswan81542Egypt Electronics Engineering Department Universidad Tecnica Federico Santa MariaValparaiso2390123Chile Department of Electromechanical Systems and Metal EngineeringGhent UniversityGhent9000Belgium FlandersMake@UGent–corelab EEDT-MP 3001LeuvenBelgium Electrical Engineering Department Kafrelshiekh UniversityKafr el-Sheikh33511Egypt

Hydrocarbons,carbon monoxide and other pollutants from the transportation sector harm human health in many *** cell(FC)has been evolving rapidly over the past two decades due to its efficient mechanism to transform the chemical energy in hydrogen-rich compounds into electrical *** main drawback of the standalone FC is its slow dynamic response and its inability to supply rapid variations in the load ***,adding energy storage systems is ***,to manage and distribute the power-sharing among the hybrid proton exchange membrane(PEM)fuel cell(FC),battery storage(BS),and supercapacitor(SC),an energy management strategy(EMS)is *** this research work,an optimal EMS based on a spotted hyena optimizer(SHO)for hybrid PEM fuel cell/BS/SC is *** main goal of an EMS is to improve the performance of hybrid FC/BS/SC and to reduce the amount of hydrogen *** prove the superiority of the SHO method,the obtained results are compared with the chimp optimizer(CO),the artificial ecosystem-based optimizer(AEO),the seagull optimization algorithm(SOA),the sooty tern optimization algorithm(STOA),and the coyote optimization algorithm(COA).Two main metrics are used as a benchmark for the comparison:the minimum consumed hydrogen and the efficiency of the *** main findings confirm that the minimum amount of hydrogen consumption and maximum efficiency are achieved by the proposed SHO based EMS.

关键词： Modelling optimization energy management fuel cell supercapacitor hybrid system

Iron Bearing Minerals Flotation from Silica Sand Using Hydroxyl Surfactants

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Journal of Minerals and Materials Characterization and Engineering 2021年第4期9卷 327-344页

作者： Suzan S. ibrahim Wael M. fathy Magdy A. Elsayed Tawfik R. Boulos Central Metallurgical Research and Development Institute (CMRDI) Helwan Cairo Egypt Al-Azhar University Faculty of Engineering Mining and Petroleum Dept. Cairo Egypt

A technological clayey sandstone sample from Wadi Qena locality, Eastern Desert of Egypt, was directed to processing. Fine kaolin and clean silica sand were produced after intensive attrition scrubbing of the sample. To increase the quality of the produced silica, it was subjected to reverse anionic flotation to minimize its iron content. In this respect, conventional flotation tests using three anionic oxyhydryl surfactants namely: sodium dodecyl benzene sulphonate, sodium naphtha sulphonate, and sodium dodecyl sulphate, were tried. Results showed a privilege action for sodium dodecyl sulphate to remove most of the iron oxide content of the sample. A statistical Box-Behnken design was constructed to optimize the process efficiency. It was shown that from a flotation feed contained 360 ppm Fe2O3 and 1190 ppm Al2O3, sand concentrate contained 29 ppm Fe2O3 and 564 ppm Al2O3, was produced. The optimum flotation conditions were 3.86 kg/t sodium dodecyl sulphate dose, 3.22 flotation pulp pH, 1226 rpm impeller speed, and 22.24 L/min airflow rate. Variables interaction effects results showed that flotation separation efficiency was significantly influenced by air flow rate and cell impeller speed of the process.

关键词： Iron Oxide/Silica Flotation Anionic Surfactants Affecting Variables

Impact of biliary complications on quality of life in live-donor liver transplant recipients

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World Journal of Hepatology 2021年第10期13卷 1405-1416页

作者： Reginia Nabil Guirguis Ehab Hasan Nashaat Azza Emam Yassin Wesam Ahmed ibrahim Shereen A Saleh Mohamed Bahaa Mahmoud El-Meteini Mohamed fathy Hany Mansour Dabbous Iman Fawzy Montasser Manar Salah Ghada abdelrahman Mohamed Department of Internal Medicine Gastroenterology and Hepatology UnitFaculty of MedicineAin Shams UniversityCairo 11591Egypt Department of General Surgery Faculty of MedicineAin Shams UniversityCairo 11591Egypt Department of Tropical Medicine Faculty of MedicineAin Shams UniversityCairo 11591Egypt

BACKGROUND Despite significant advancements in liver transplantation(LT)surgical procedures and perioperative care,post-LT biliary complications(BCs)remain a significant source of morbidity,mortality,and graft *** addition,data are conflicting regarding the health-related quality of life(HRQoL)of LT ***,the success of LT should be considered in terms of both the survival and recovery of *** To assess the impact of BCs on the HRQoL of live-donor LT recipients(LDLT-Rs).METHODS We retrospectively analysed data for 25 LDLT-Rs who developed BCs post-LT between January 2011 and December 2016 at our *** Short Form 12 version 2(SF 12v2)health survey was used to assess their *** also included 25 LDLT-Rs without any post-LT complications as a control *** The scores for HRQoL of LDLT-Rs who developed BCs were significantly higher than the norm-based scores in the domains of physical functioning(P=0.003),role-physical(P<0.001),bodily pain(P=0.003),general health(P=0.004),social functioning(P=0.005),role-emotional(P<0.001),and mental health(P<0.001).No significant difference between the two groups regarding vitality was detected(P=1.000).The LDLT-Rs with BCs had significantly lower scores than LDLT-Rs without BCs in all HRQoL domains(P<0.001)and the mental(P<0.001)and physical(P=0.0002)component summary *** The development of BCs in LDLT-Rs causes a lower range of improvement in HRQoL.

关键词： Live-donor liver transplantation Quality of life The Short Form 12 version 2 Cirrhosis Biliary complications Mental health