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Optimal FOPID Controllers for LFC Including Renewables by Bald Eagle Optimizer

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Computers, Materials & Continua 2022年第12期73卷 5525-5541页

作者： Ahmed M.Agwa mohamed abdeen Shaaban M.Shaaban Department of Electrical Engineering College of EngineeringNorthern Border UniversityArar1321Saudi Arabia Electrical Engineering Department Faculty of EngineeringAl-Azhar UniversityCairo11651Egypt Department of Engineering Basic Science Faculty of EngineeringMenoufia UniversityShebin El-Kom32511Egypt

In this study,a bald eagle optimizer(BEO)is used to get optimal parameters of the fractional-order proportional-integral-derivative(FOPID)controller for load frequency control(LFC).SinceBEOtakes only a very short time in finding the optimal solution,it is selected for designing the FOPID controller that improves the system stability and maintains the frequency within a satisfactory range at different *** and demonstrations are carried out using *** performance of the BEOFOPID controller is evaluated using a two-zone interlinked power system at different loads and under uncertainty of wind and solar *** robustness of the BEO-FOPID controller is examined by testing its performance under varying system time *** results obtained by the BEOFOPID controller are compared with those obtained by BEO-PID and PID controllers based on recent metaheuristics optimization algorithms,namely the sine-cosine approach,Jaya approach,grey wolf optimizer,genetic algorithm,bacteria foraging optimizer,and equilibrium optimization *** results confirm that the BEO-FOPID controller obtains the finest result,with the lowest frequency *** results also confirm that the BEOFOPID controller is stable and robust at different loads,under varying system time constants,and under uncertainty of wind and solar energies.

关键词： Fractional order PID control load frequency control renewable energy bald eagle optimizer

Optimizing the adhesion of soil-touching parts based on biomimetic concepts using the Taguchi method

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International Journal of Agricultural and Biological Engineering 2022年第1期15卷 147-154页

作者： Abouelnadar El.Salem Guozhong Zhang mohamed Anwer Mahmoud abdeen Hongchang Wang Yuan Gao College of Engineering Huazhong Agricultural UniversityWuhan 430070China Soil Conservation Department Desert Research CenterCairo 11753Egypt Modern Agricultural Equipment Engineering Technology Research Center Wuhan 430070China Agricultural Engineering Department College of AgricultureZagazig UniversityZagazig 44519Egypt

Several studies highlighted that the surface shape modifications which are inspired by the soil-burrowing animals have positively impacted the soil-tool adhesion;however,it is still unclear what the optimum dimensions of the domed surface are for minimizing soil-tool *** this study,twenty-seven domed discs were created according to Taguchi orthogonal array L27(3^(3))to determine the optimum dimensions of the domed surface that minimize normal adhesion force and disc sinkage simultaneously,as well as comparing the effect of the optimized domed disc versus the flat disc on the normal adhesion force under different soil *** results revealed that disc coverage ratio and dome height to diameter ratio are essential to design parameters that influence the normal adhesion force of *** to the signal-to-noise ratio analysis,it was observed that the combination of 60%disc coverage ratio,25%dome height to diameter ratio,and 10 mm dome base diameter was found to be the most appropriate for the well-balanced improvement of both normal adhesion force and disc sinkage *** all treatments,the optimized domed disc produced less normal adhesion force than the flat disc(about 7%-18%,according to soil condition).It can be concluded that properly designed domed surfaces can significantly reduce the normal adhesion force when compared to flat surfaces.

关键词： biomimetics paddy soil normal adhesion disc sinkage Taguchi method

Y-Shaped Intra-Scleral Fixated Lens versus Retro-Pupillary Iris Claw Lens in the Treatment of Aphakia

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Open Journal of Ophthalmology 2019年第2期9卷 105-124页

作者： Ahmed mohamed Morshed Mahmoud Nasr Aldeeb Adel Kamal abdeen Salah mohamed Almosalamy Ophthalmology Department Faculty of Medicine Zagazig University Zagazig Egypt

Background: Many reasons can lead to an aphakia without adequate capsular support for implantation of a posterior chamber intraocular lens (IOL), such as intraoperative unintentional rupture of posterior capsule during phacoemulsification, planned intracapsular cataract extraction, ocular trauma and lens dislocation due to congenital and acquired causes. Purpose: To compare Y-shaped intra-scleral fixation of a posterior chamber IOL with retro pupillary fixation of an iris-claw intraocular lens (IOL) for Aphakic eyes without sufficient capsular support as respects safety, visual recovery and complications of both methods. Patients and Methods: One hundred Aphakic eyes were arbitrarily distributed between two groups. Group A included 50 eyes treated with retropupillary fixation of iris claw lens and group B included 50 eyes treated with Y-shaped intra-scleral fixation technique. Preoperative, intraoperative and postoperative data were analysed including best corrected visual acuity (BCVA), intraocular pressure (IOP), surgical time, intraoperative problems, IOL malposition and postoperative complications. Following up on patients was carried out for at least six months. Results: The mean duration of surgery was 21 ± 5.3 min in group A and was 53.4 ± 6.9 min in group B (p-value 0.05). IOL tilt was found in 0 (0%) eyes in group A and in 5 (10%) eyes in group B (p 0.05). Conclusion: The results of our study indicated that both methods are satisfactory in correcting aphakia without sufficient capsular support as regards postoperative best corrected visual acuity (BCVA);however the surgical technique of retropupillary iris claw lens is easier, shorter, with low intra- and postoperative complications and safer than those used for intra-scleral fixation of IOL. But for eyes which lack both iris and capsular support, a scleral fixation of a posterior chamber IOL remains the only option.

关键词： Aphakia Iris-Claw Intraocular Lens (IOL) Y-Shaped Intra Scleral Fixation

Evaluation of Circulating Fatty Acid Synthase as a Biomarker in Non-Alcoholic Fatty Liver Disease

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Open Journal of Gastroenterology 2016年第9期6卷 229-237页

作者： Aida abdeen Mahmoud Asmaa N. Mohammad mohamed Abdel Wahab Ezat Department of Medical Biochemistry Faculty of Medicine Sohag University Sohag Egypt Department of Tropical Medicine Faculty of Medicine Sohag University Sohag Egypt Department of Internal Medicine Faculty of Medicine Sohag University Sohag Egypt

Background: The liver is the corner stone in lipid metabolism, free fatty acid uptake, synthesizing, storing and exporting lipids;non-alcoholic fatty liver disease (NAFLD) develops if there is any interruption or derangements in lipid metabolim. Fatty acid synthase (FAS) is the major enzyme in lipogenesis, and its circulating level is a bi-omarker of metabolically demanding human diseases. Aim of the Work: To evaluate the level of circulating FAS in NAFLD patients and to correlate it to serum lipid pa-rameters. Materials and Methods: The study included forty NAFLD patients and forty age and sex-matched healthy subjects as controls. Results: FAS levels were signifi-cantly higher in NAFLD patients compared to their level in the controls (P < 0.05). Ad-ditionally, a positive correlation was found between the levels of FAS and BMI (r = 0.57), and between FAS levels and triglycerides and low density lipoprotein cholesterol levels in NAFLD patients (r = 0.79 & 0.53, respectively). Conclusion: Elevated levels of circulating FAS can be considered as a biomarker of fatty liver disease.

关键词： NAFLD Fatty Acid Synthase Free Fatty Acids

Post Tonsillectomy Bleeding among Children in a Tertiary Hospital in the Kingdom of Bahrain: Two Years Experience

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International Journal of Otolaryngology and Head & Neck Surgery 2020年第6期9卷 203-212页

作者： Zahraa A. abdeen Worood A. Husain Alaa Q. Mandeel Sayed mohamed J. Almoosawi Department of Otorhionlaryngology Salmaniya Medical Complex Manama Kingdom of Bahrain

Background: Palatine tonsils are part of the immune system located within the Waldeyer’s ring, they are prone to infections, hypertrophy or both. These conditions are known as tonsil diseases that usually require surgical removal through tonsillectomy. Tonsillectomy is one of the most common procedures done for children but it is challenged by the occurrence of complications, especially post tonsillectomy bleeding (PTB). In the current study, the incidence of post tonsillectomy bleeding in children younger than 14 years undergoing tonsillectomy in Salmaniya Medical Complex is evaluated and their demographic data and risk factors are assessed. Method: Pediatric patients who are younger than 14 years with postoperative tonsillectomy bleeding that were treated in Salmaniya Medical Complex between the period of January 2018 and December 2019 were retrospectively studied for risk factors. Results: A total of 1161 patients within the age range of 2 - 13 years old underwent tonsillectomy in Salmaniya Medical Complex from the period of January 2018 to December 2019. Twenty-eight pediatric patients had post-tonsillectomy bleeding (PTB) during the study period with an incidence of 2.4% of the total number of pediatric tonsillectomies done in our institute. The majority were male patients and the mean age was 6.2 years. The main indication of tonsillectomy for those with bleeding was recurrent tonsillitis. A second surgery was needed in 64.5% to control the bleeding. The size of the tonsil, the level of the surgeon and the season at which the tonsillectomy was done did not seem to have any effect on the incidence of post-tonsillectomy bleeding (PTB). Conclusion: The incidence of post tonsillectomy bleeding (PTB) in Salmaniya Medical Complex is 2.4%, which makes it a common complication for a common surgery irrelevant to any patient, surgeon or climate related factors.

关键词： Pediatric Tonsillectomy Post Tonsillectomy Bleeding (PTB) Primary Post Tonsillectomy Bleeding Secondary Post-Tonsillectomy Bleeding Tonsillectomy

Hemostatic system and COVID-19 crosstalk:A review of the available evidence

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World Journal of Methodology 2022年第5期12卷 331-349页

作者： mohamed-Naguib Wifi mohamed Abdelkader Morad Reem El Sheemy Nermeen abdeen Shimaa Afify Mohammad Abdalgaber Abeer Abdellatef Mariam Zaghloul mohamed Alboraie mohamed El-Kassas Department of Internal Medicine Hepatogastroenterology UnitKasr Al-Ainy School of MedicineCairo UniversityCairo 11451Egypt Clinical Hematology Unit Department of Internal MedicineKasr Al-AinyFaculty of MedicineCairo UniversityCairo 11451Egypt Department of Tropical Medicine Minia Faculty of MedicineMinia UniversityMinia 61511Egypt Department of Tropical Medicine Faculty of MedicineAlexandria UniversityAlexandria 21523Egypt Department of Gastroenterology National Hepatology and Tropical MedicineNational Hepatology and Tropical Medicine Research InstituteCairo 11451Egypt Department of Gastroenterology and Hepatology Police Authority HospitalAgozaGiza 12511Egypt Department of Hepatology Gastroenterology and Infectious DiseasesFaculty of MedicineKafrelsheikh UniversityKafrelsheikh 33511Egypt Department of Internal Medicine Al-Azhar UniversityCairo 11884Egypt Department of Endemic Medicine Faculty of MedicineHelwan UniversityHelwan 11731Egypt

Since the discovery of severe acute respiratory syndrome coronavirus 2(SARSCoV-2)and its resultant coronavirus disease 2019(COVID-19)pandemic,respiratory manifestations have been the mainstay of clinical diagnosis,laboratory evaluations,and radiological *** time passed,other pathological aspects of SARS-CoV-2 have been *** hemostatic abnormalities have been reported since the rise of the pandemic,which was sometimes superficial,transient,or *** thrombocytopenia,thrombocytosis,venous,arterial thromboembolism,and disseminated intravascular coagulation are among the many hemostatic events associated with *** thromboembolism necessitating therapeutic doses of anticoagulants is more frequently seen in severe cases of COVID-19,especially in patients admitted to intensive care *** complications rarely arise in COVID-19 patients either due to a hemostatic imbalance resulting from severe disease or as a complication of over *** the pathogenesis of coagulation disturbance in SARS-CoV-2 infection is not yet understood,professional societies recommend prophylactic antithrombotic therapy in severe cases,especially in the presence of abnormal coagulation *** review article discusses the various available evidence on coagulation disorders,management strategies,outcomes,and prognosis associated with COVID-19 coagulopathy,which raises awareness about the importance of anticoagulation therapy for COVID-19 patients to guard against possible thromboembolic events.

关键词： SARS-CoV-2 COVID-19 Thrombosis Pulmonary embolism Disseminated intravascular coagulation

Endoscopic resection of superficial bowel neoplasia:The unmet needs in the Egyptian practice

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World Journal of Gastrointestinal Endoscopy 2022年第4期14卷 235-249页

作者： mohamed H Emara Mariam Zaghloul Haidi Karam-Allah Ramadan Salem Youssef mohamed Mohammed Tag-Adeen Ahmed Alzamzamy mohamed Alboraie Ahmad Madkour Ahmed Youssef Altonbary Tarik I Zaher Ahmed Abo Elhassan Nermeen abdeen Mohammed Hussien Ahmed Department of Hepatology Gastroenterology and Infectious DiseasesKafrelsheikh UniversityKafr Elshiekh 33516Egypt Department of Tropical Medicine and Gastroenterology Assiut UniversityAssiut 71515Egypt Department of Internal Medicine Faculty of MedicineGastroenterology and Hepatology UnitZagazig UniversityZagazig 44519Egypt Division of Gastroenterology and Hepatology Department of Internal MedicineSouth Valley UniversityQena Faculty of MedicineQena 83523Egypt Department of Gastroenterology and Hepatology Maadi Armed Forces Medical ComplexMilitary Medical AcademyCairo 11841Egypt Department of Internal Medicine Al-Azhar UniversityCairo11884Egypt Department of Endemic Medicine Helwan UniversityCairo 11795Egypt Department of Gastroenterology and Hepatology Mansoura UniversityMansoura 35516Egypt Department of Tropical Medicine Zagazig UniversityZagazig 44519Egypt Department of Tropical Medicine Suez Canal UniversityIsmailia 41522Egypt Department of Tropical Medicine Alexandria UniversityAlexandria 21526Egypt

BACKGROUND Management of superficial bowel neoplasia(SBN)in early stages is associated with better *** last few decades experienced a paradigm shift in the management of SBN with the introduction of advanced endoscopic resection techniques(ERTs).However,there are no clear data about the aspects of ERTs in Egypt despite the growing gastroenterology *** To investigate the knowledge,attitude,and practice of ERTs toward management of SBN among Egyptian practitioners and the suitability of the endoscopy units’infrastructures toward these *** An online 2-pages questionnaire was *** first page comprised demographic data,and questions for all physicians,about the knowledge(11 questions)of and attitude(5 questions)toward ERTs as a therapeutic option for *** second page investigated the practice of ERTs by endoscopists(6 questions)and the infrastructures of their endoscopy units(14 questions).The survey was disseminated through July 2021 and the data were collected in an excel sheet and later analyzed *** The complete responses were 833/2300(36.2%).The majority of the participants were males(n=560,67.2%),middle-aged(n=366,43.9%),consultants(n=464,55.7%),gastroenterologists(n=678,81.4%),spending≥15 years in practice(n=368,44.2%),and were working in university hospitals(n=569,68.3%).The majority correctly identified the definition of SBN(88.4%)and the terms polypectomy,endoscopic mucosal resection(EMR),and endoscopic submucosal dissection(ESD)(92.1%,90.2%,and 89.1%respectively).However,26.9%,43.2%and 49.5%did not recognize the clear indication of polypectomy,EMR,and ESD *** 68.1%of physicians are convinced about the ERTs for management of SBN;only 8.9%referred all candidate cases for *** 76.5%of endoscopists had formal training in the basic polypectomy techniques while formal training for EMR and ESD was encountered only in 31.9%and 7.2%*** 71.6%and 88.4%of endoscopists did not per

关键词： Endoscopic submucosal dissection Endoscopic mucosal resection Polypectomy Superficial bowel neoplasia Egypt

Assessment of Levels of Knowledge towards Hormonal Related Breast Cancer Risk Factors in Qurayyat, Northern Saudi Arabia

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Open Journal of Obstetrics and Gynecology 2019年第3期9卷 371-381页

作者： Abdelbaset mohamed Elasbali Elyasa Mustafa Elfakia Mohammed Ziad Alonzi Rania abdeen Hussain Abdalla Azizah Mazi Aldaham Diem Fayez Aljubab Naif Muflih Alsharari Hussain Gadelkarim Ahmed Department of Clinical Laboratory Sciences College of Applied Medical Sciences Jouf University Qurayyat KSA Department of Clinical Laboratory Sciences College of Applied Medical Science Jouf University Sakaka KSA Department of Obstetrics and Gynecology College of Medicine University of Hail Hail KSA College of Medicine University of Hail Hail KSA Department of Histopathology and Cytology FMLS University of Khartoum Khartoum Sudan

Background: Continued exposure to sex hormones such as estrogen is a critical risk for subsequent breast cancer. Thus the present study aimed to assess the levels of knowledge towards hormonal related breast cancer risk factors in Qurayyat, Northern Saudi Arabia. Methodology: This descriptive study included 737 Saudi volunteers living in the city of Qurayyat, Northern Saudi Arabia. For females, only those agreeing to participate in the breast self-examination workshop were included, and non-respondents were included in the questionnaire. Results: For the question apropos “Inheritance as a risk factor for BC,” 405/607 (66.7%) females signposted certainly “Yes,” as well as, 70/130 (54%) males signposted certainly “Yes.” The odds ratio (OR) and 95% confidence interval (95% CI) were not statistically significant, but the level of knowledge was relatively higher among females OR (95% CI) = 1.4321 (0.9597 to 2.1370), P = 0.0786. “Are early puberty and late menopause risk factors for breast cancer?” No statistical significant differences were eminent between males and females, OR (95% CI) = 0.8878 (0.5932 to 1.3287), P = 0.5629. Conclusion: Saudi women are enthusiastically willing to raise their knowledge and awareness of breast cancer prevention and control. Although women have greater knowledge about breast cancer risk factors compared to men, still some gaps need to be filled.

关键词： Breast Cancer Hormones Risk Factors Estrogen Saudi Arabia Alquriat

Noninvasive Fibrosis Scores as Prognostic Markers for Varices Needing Treatment in Advanced Compensated Liver Cirrhosis

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Open Journal of Gastroenterology 2017年第8期7卷 230-242页

作者： Elham Ahmed Hassan Abeer Sharaf El-Din Abd El-Rehim Zain El-abdeen Ahmed Sayed Ahmed Mohmmed Ashmawy Emad Farah mohamed Kholef Abeer Sabry Wael Abd-Elgwad Elsewify Department of Tropical Medicine and Gastroenterology Faculty of Medicine Assiut University Assiut Egypt Department of Internal Medicine Faculty of Medicine Assiut University Assiut Egypt Department of Clinical pathology Faculty of Medicine Aswan University Aswan Egypt Department of Internal Medicine Faculty of Medicine Helwan University Cairo Egypt Department of Internal Medicine Faculty of Medicine Aswan University Aswan Egypt

Background/purpose: Noninvasive assessment of esophageal varices (EVs), their size and bleeding stigmata may reduce endoscopic burden, cost and drawbacks. We aimed to evaluate the diagnostic performance of noninvasive fibrosis scores (AAR, APRI, FIB-4, King and VITRO scores) in predicting the presence of EVs and high risk varices needing treatment (VNT) in HCV-related cirrhosis of Egyptian patients. Methods: This prospective study included 154 HCV-related advanced compensated cirrhotic patients with no history of bleeding who underwent screening endoscopy for EVs. AAR, APRI, FIB-4, King and VITRO scores were assessed. Results: Esophageal varices were found in 120 patients (77.9%) and VNT in 92 patients (59.7%). Apart from AAR, all scores demonstrated statistically significant correlations with the presence and the size of EVs. Using area under receiver operating characteristic curve (AUC), these scores were good predictors for the presence of EVs and VNT, where VITRO score had the highest AUC (0.920 and 0.900) and accuracy (97.1% and 87%), sensitivity (75, 82.6%), specificity (100, 93.5%), PPV (100, 95%) and NPV (53.2, 78.4%) with cutoffs >1.3 and >1.8 respectively. Conclusion: Noninvasive fibrosis scores can predict the presence of EVs and VNT. VITRO score was the best predictor with higher accuracy for clinical applicability than studied scores.

关键词： Esophageal Varices Hepatitis C Liver Cirrhosis VITRO Score