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Conventional generation emulation for power grids with a high penetration of wind power

Clean Energy 2021年第1期5卷 93-103页

作者： Rasha El-Azab eslam M.Wazeer Mohamed Daowd A.M.Abdel Ghany Electrical Power and Machines Department Faculty of EngineeringHelwan UniversityCairoEgypt

Integrating large-scale wind plants with the electricity grids has many challenges for grid *** the variability and uncertainty of wind power,coordinating between different technologies of generation in the same grid can be considered the main problem,specifically for short-term frequency ***,a large penetration of wind power generation in modern power grids has a risky influence on the power-system ***-generation plants have contradictory behaviour compared to classic thermal plants,especially in active generated power-shortage events due to the variable nature of wind *** experience in wind plants keeps part of the available wind power unloaded,using what are known as deloading *** deloading techniques are usually applied to emulate the thermal-plant-governor function and confirm a proper spinning reserve for any active-power *** techniques decrease the generated power from wind plants continuously from maximum point tracking ***,the practical capacity,annual generated energy and economical income of wind plants are *** addition,grid-protection and control sub-schemes are set and designed according to the well-known conventional responses of thermal plants,which increase the need for thermal-plant-behaviour *** this paper,instead of the usual deloading methods,a supercapacitors scheme is proposed with wind turbines to emulate the response of conventional power *** study discusses the technical and economic benefits of the proposed addition of supercapacitors in the wind-plant-planning *** frequency grid-code indices are selected to evaluate studied *** results of the IEEE four-generation two-area system determines the effectiveness of suggested schemes *** System Advisor Model(SAM)program estimates the economic benefits of a typical US study case compared with the existing wind-deloading technique.

关键词： wind energy planning analysis energy storage supercapacitor frequency stability

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Spatial distribution of sand flies(Diptera: Psychodidae; Larroussius group), the vectors of visceral leishmaniasis in Northwest of Iran

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Asian Pacific Journal of Tropical Biomedicine 2018年第9期8卷 425-430页

作者： eslam Moradi-Asl Yavar Rassi Davoud Adham Ahmad Ali Hanafi-Bojd Abedin Saghafipour Sayena Rafizadeh Department of Public Health School of Public Health Ardabil University of Medical Sciences Department of Medical Entomology and Vector Control School of Public Health Tehran University of Medical Sciences Department of Public Health Faculty of Health Qom University of Medical Sciences Ministry of Health National Institute for Medical Research Development

Objective: To determine spatial distribution of sand flies(Diptera: Psychodidae; Larroussius group), the vectors of visceral leishmaniasis in Ardabil province, Northwest of ***: Sand flies were collected using sticky traps from the 30 selected points in Ardabil province, during May-November *** MaxEnt model in GIS software was used for ***: A total of 2 794 specimens of sand flies were collected, of which 33% were Larroussius subgenus sand *** kandelakii and Phlebotomus wenyoni were the highest and lowest collected species *** on the modeling, four areas in the province were identified with more than 70% probability of the presence of Larroussius group vectors which were at risk of visceral leishmaniasis disease ***: The distribution of Larroussius subgenus sand flies was observed in all parts of *** the northern parts of the province(Germi and Bilesavar counties) as well as central part(Ardabil and Meshkinshahr counties) were of great importance in terms of the presence of Larroussius subgenus sand flies and the possibility of transmission of the visceral leishmaniasis.

关键词： Larroussius subgenus Sand fly Ardabil Modeling Iran

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Endoscopic stapedotomy: Merits and demerits

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Journal of Otology 2018年第3期13卷 97-100页

作者： Waleed Moneir Ahmed Musaad Abd El-fattah eslam Mahmoud Mohamed Elshaer Department of Otolaryngology Faculty of Medicine Mansoura University

This work is conducted in Mansoura University Hospitals,Egypt,to show the advantages and disadvantages of endoscopic stapedotomy in comparison to microscopic *** work described has not been published previously nor under consideration for publication *** authors declare that there is no conflict of *** study is a part of a master degree thesis submitted by eslam Mahmoud as partial fulfillment for a master *** review board approval,Faculty of Medicine-Mansoura University,was obtained for the study(IRB:MS/15.09.49).

关键词： Mansoura University Hospitals Medicine-Mansoura University

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Mathematical Analysis of the Probability of Spontaneous Mutations in HIV-1 Genome and Their Role in the Emergence of Resistance to Anti-Retroviral Therapy

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Advances in Microbiology 2019年第11期9卷 910-916页

作者： eslam Abbas Kobri El Koba Medical Complex Cairo Egypt

High mutability of HIV is the driving force of antiretroviral drug resistance, which represents a medical care challenge. The proposed model represents a mathematical analysis of the mutability of each gene in the HIV-1 genome. It depends on a linear relation wherein the probability of spontaneous mutations emergence is directly proportional to the ratio of the gene length to the whole genome length. The mathematical analysis shows that tat, vpr and vpu are the least mutant genes in HIV-1 genome, and protease PROT gene is the least mutant gene component of polymerases POL. Accordingly, tat, vpr and vpu are the best candidates for HIV-1 recombinant subunit vaccines or as a part of “prime and boost” vaccine combinations. Also, the protease inhibitor-based regime represents a high genetic barrier for HIV to overcome.

关键词： HIV-1 Spontaneous Mutations Stability Index Drug Resistance

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When a new definition overhauls perceptions of MAFLD related cirrhosis care

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Hepatobiliary Surgery and Nutrition 2020年第6期9卷 801-804页

作者： Kenneth I.Zheng Mohammed eslam Jacob George Ming-Hua Zheng MAFLD Research Center Department of Hepatologythe First Affiliated Hospital of Wenzhou Medical UniversityWenzhouChina Storr Liver Centre Westmead Institute for Medical ResearchWestmead Hospital and University of SydneySydneyAustralia Institute of Hepatology Wenzhou Medical UniversityWenzhouChina Key Laboratory of Diagnosis and Treatment for The Development of Chronic Liver Disease in Zhejiang Province WenzhouChina

Metabolic-associated fatty liver disease(MAFLD)(1),formerly known as non-alcoholic fatty liver disease,is a major causes of liver cirrhosis(2).MAFLD represents a growing global health and economic burden since approximately one in four people have the disease(3).As a consequence,MAFLD-related cirrhosis is expected to become the leading cause for liver failure and liver cancer,and the major indication for liver transplantation this century(3).

关键词： cirrhosis MAF Metabolic

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Innovative Hetero-Associative Memory Encoder(HAMTE)for Palmprint Template Protection

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Computer Systems Science & Engineering 2023年第7期46卷 619-636页

作者： eslam Hamouda Mohamed Ezz Ayman Mohamed Mostafa Murtada K.Elbashir Meshrif Alruily Mayada Tarek College of Computer and Information Sciences Jouf UniversitySakaka72314Saudi Arabia College of Computers and Informatics Mansoura University35516Egypt

Many types of research focus on utilizing Palmprint recognition in user identification and *** Palmprint is one of biometric authentication(something you are)invariable during a person’s life and needs careful protection during enrollment into different biometric authentication *** and irreversibility are critical requirements for securing the Palmprint template during enrollment and *** paper proposes an innovative HAMTE neural network model that contains Hetero-Associative Memory for Palmprint template translation and projection using matrix multiplication and dot product multiplication.A HAMTE-Siamese network is constructed,which accepts two Palmprint templates and predicts whether these two templates belong to the same user or different *** HAMTE is generated for each user during the enrollment phase,which is responsible for generating a secure template for the enrolled *** proposed network secures the person’s Palmprint template by translating it into an irreversible template(different features space).It can be stored safely in a trusted/untrusted third-party authentication system that protects the original person’s template from being *** results are conducted on the CASIA database,where the proposed network achieved accuracy close to the original accuracy for the unprotected Palmprint *** recognition accuracy deviated by around 3%,and the equal error rate(EER)by approximately 0.02 compared to the original data,with appropriate performance(approximately 13 ms)while preserving the irreversibility property of the secure ***,the brute-force attack has been analyzed under the new Palmprint protection scheme.

关键词： Palmprint recognition hetero-associative memory neural network and Siamese network

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Improved Siamese Palmprint Authentication Using Pre-Trained VGG16-Palmprint and Element-Wise Absolute Difference

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Computer Systems Science & Engineering 2023年第8期46卷 2299-2317页

作者： Mohamed Ezz Waad Alanazi Ayman Mohamed Mostafa eslam Hamouda Murtada K.Elbashir Meshrif Alruily College of Computers and Information Sciences Jouf UniversitySakaka72314Saudi Arabia

Palmprint identification has been conducted over the last two decades in many biometric ***-dimensional data with many uncorrelated and duplicated features remains difficult due to several computational complexity *** paper presents an interactive authentication approach based on deep learning and feature selection that supports Palmprint *** proposed model has two stages of learning;the first stage is to transfer pre-trained VGG-16 of ImageNet to specific features based on the extraction *** second stage involves the VGG-16 Palmprint feature extraction in the Siamese network to learn Palmprint *** proposed model achieves robust and reliable end-to-end Palmprint authentication by extracting the convolutional features using VGG-16 Palmprint and the similarity of two input Palmprint using the Siamese *** second stage uses the CASIA dataset to train and test the Siamese *** suggested model outperforms comparable studies based on the deep learning approach achieving accuracy and EER of 91.8%and 0.082%,respectively,on the CASIA left-hand images and accuracy and EER of 91.7%and 0.084,respectively,on the CASIA right-hand images.

关键词： Palmprint authentication transfer learning feature extraction classification VGG-16 and Siamese network

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Lateral rectus muscle recession and the vertical palpebral fissure height: to do or not to do inter-muscular septum dissection?

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International Journal of Ophthalmology(English edition) 2018年第6期11卷 1053-1055页

作者： Mohammad Ali Abtahi Alireza Zandi eslam Mandegarfard Hamidreza Jahanbani-Ardakani Behzad Mahaki Seyed-Hossein Abtahi Isfahan Eye Research Center Feiz Hospital Isfahan University of Medical Sciences Department of Ophthalmology Feiz Hospital Isfahan University of Medical Sciences Isfahan Medical Students Research Center Isfahan University of Medical Sciences Department of Biostatistics School of Health Kermanshah University of Medical Sciences

In this study, we aimed to evaluate changes of vertical palpebral fissure height （VPFH） after unilateral lateral rectus muscle recession. Twenty-five and twenty-six patients who were candidates for lateral rectus muscle recession were assigned into “with” and “without” intermuscular septum dissection study arms. The VPFH was measured at one-day before surgery and in two weeks and three months, postoperatively. Three months after surgery, significant increase of VPFH was observed in both groups （Paired t-test; P=0.005）. Also, less widening of VPFH was observed in “with intermuscular septum dissection” group （Change in VPFH in “with intermuscular septum dissection” vs “without intermuscular septum dissection” groups： 0.48 mm vs 1.34 mm; ANCOVA test; P〈0.001）. However, such results were not observed two weeks post-operatively （Change in VPFH in “with intermuscular septum dissection” vs “without intermuscular septum dissection” groups： -0.28 mm vs 0.28 mm; ANCOVA test; P=0.302）. Intermuscular septum dissection is recommended in lateral rectus muscle recession to partially prevent the undesirable increment of VPFH.

关键词： intermuscular septum lateral rectus muscle recession vertical palpebral fissure height

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Prediction of COVID-19 Confirmed Cases Using Gradient Boosting Regression Method

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Computers, Materials & Continua 2021年第1期66卷 315-329页

作者： Abdu Gumaei Mabrook Al-Rakhami Mohamad Mahmoud Al Rahhal Fahad Raddah H.Albogamy eslam Al Maghayreh Hussain AlSalman College of Computer and Information Sciences King Saud UniversityRiyadh11362Saudi Arabia Computer Science Department Faculty of Applied ScienceTaiz UniversityTaizYemen College of Applied Computer Sciences King Saud UniversityRiyadh11362Saudi Arabia

The fast spread of coronavirus disease(COVID-19)caused by SARSCoV-2 has become a pandemic and a serious threat to the *** of May 30,2020,this disease had infected more than 6 million people globally,with hundreds of thousands of ***,there is an urgent need to predict confirmed cases so as to analyze the impact of COVID-19 and practice readiness in healthcare *** study uses gradient boosting regression(GBR)to build a trained model to predict the daily total confirmed cases of *** GBR method can minimize the loss function of the training process and create a single strong learner from weak *** are conducted on a dataset of daily confirmed COVID-19 cases from January 22,2020,to May 30,*** results are evaluated on a set of evaluation performance measures using 10-fold cross-validation to demonstrate the effectiveness of the GBR *** results reveal that the GBR model achieves 0.00686 root mean square error,the lowest among several comparative models.

关键词： COVID-19 coronavirus disease SARS-CoV-2 machine learning gradient boosting regression(GBR)method

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Diet fortification for mild and moderate picky eating in typically developed children:Opinion review of Middle East consensus

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World Journal of Clinical Pediatrics 2025年第1期14卷 139-148页

作者： Mohammed Al-Beltagi Elie Choueiry Najat Alahmadi Zeinab Demerdash Wafaa Helmi Ayesh Khoula Al-Said Fatima Al-Haddad Sanaa Y Shaaban eslam Tawfik Department of Pediatric Faculty of MedicineTanta UniversityTanta 31511Egypt Department of Pediatric University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671ManamaBahrain Paediatric Intensive and Critical Care Unit Hospital Hôtel Dieu de FranceBeirut 166830BeyrouthLebanon Department of Pediatric Gastroenterology Hepatology and NutritionMadina Maternity and Children HospitalKing Salman Medical CityAlmadina Almonawarh 41412Almadina AlmonawarhSaudi Arabia Department of Gastroenterology Hepatology and NutritionAl Amiri HospitalKuwait City 999044Kuwait Department of Nutrition Altadawi Speciality HospitalDubai 1853DubayyUnited Arab Emirates Department of Paediatric Gastroenterology Royal HospitalMuscat 1331MuscatOman Department of Dietetic Salmaniya Medical ComplexGovernment HospitalsAl Salmaniya 12ManamaBahrain Department of Pediatrics Faculty of MedicineAin Shams UniversityCairo 11591Egypt Department of Paediatric Faculty of MedicineSuez UniversitySuez 41522Egypt Department of Paediatric Sheikh Khalifa Medical CityAbu Dhabi 00000Abu DhabiUnited Arab Emirates

BACKGROUND Picky eating is a commonly observed behavior among children globally,negatively impacting their physical and mental *** common characteristics distinguish peaky eaters,including food selectivity,food neophobia,and food avoidance,there is no clear definition to assess this *** to the unavailability of data regarding picky eating,it wasn’t easy to estimate its *** To develop a regional protocol to help healthcare professionals identify and manage mild and moderate picky eating *** A virtual roundtable discussion was held in April 2021 to gather the opinions of seven pediatricians and two pediatric dietitians from eight Middle Eastern countries who had great experience in the management of picky *** discussion covered different topics,including clearly defining mild and moderate picky eating,identifying the role of diet fortification in these cases,and the possibility of developing a systematic approach to diet *** The panel identified picky eating as consuming an inadequate amount and variety of foods by rejecting familiar and unfamiliar *** of the time,moderate picky eating cases had micronutrient deficiencies with over-or undernutrition;the mild cases only showed inadequate food consumption and/or poor diet *** attention to the organic red flags like growth faltering and development delay and behavioral red flags,including food fixation and anticipatory gagging,will help healthcare professionals evaluate the picky eaters and the caregivers to care for their *** dietary supplementation and commercial food fortification play an important role in picky eating,they were no benefit in the Middle *** The panel agreed that food fortification through a food-first approach and oral nutritional supplements would be the best for Middle Eastern *** recommendations would facilitate identifying and managing picky-eating children in the Middle East.

关键词： Picky eating Diet fortification Children Protocol Roundtable discussion Middle East

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