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Chinese Journal of Cancer 2012年第10期31卷 484-490页

作者： Hany Eldeeb Rasha hamdy Hamed Oncology Center Northampton General HospitalNorthampton NN1 5BDUK Department of clinical Oncology and Nuclear Medicine Faculty of MedicineMansoura UniversityEgypt

The management of cervical lymph node metastases of squamous cell carcinoma from an unknown primary site is still a therapeutic *** report here our experience in treating these patients with chemoradiotherapy as a curative *** from 40 patients were *** total,20(50%) patients underwent excisional *** patients underwent radiotherapy,which was delivered to both sides of the neck and pharyngeal mucosa(extensive field),and concurrent chemotherapy consisting of weekly cisplatin at a dose of 40 mg/*** clinical stage of the cervical nodes at presentation was N1 in 25%,N2 in 60%,and N3 in 15%.Most patients(75%) developed at least grade 3 *** patients(20%) had grade 3 xerostomia and 18 patients(45%) required esophageal dilation for *** 5-year overall survival(OS) rate of all patients was 67.5%.The 5-year OS rates of patients with N1,N2,and N3 lesions were 100%,67%,and 41%,respectively(P = 0.046).The 5-year progression-free survival rate was 62.5%.In multivariate analysis,only N stage significantly affected OS(P = 0.022).Emergence of the occult primary was very limited(1 patient only).Our results suggest that extensive irradiation of both sides of the neck and pharyngeal mucosa with concurrent chemotherapy results in a lower emergence of primary *** the survival of patients with unknown primary is comparable to that of patients with known primary,an attempt at cure should always be made.

关键词：鳞状细胞癌淋巴结化疗放射治疗多变量分析生存率患者隐匿性

Corrosion and corrosion-fatigue behavior of magnesium metal matrix composites for bio-implant applications:A review

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Journal of Magnesium and Alloys 2023年第4期11卷 1125-1161页

作者： Hassan Delavar Amirhossein Jabbari Mostahsan hamdy Ibrahim School of Mechanical Engineering Iran University of Science and TechnologyTehranIran Department of Mechanical Engineering Sharif University of TechnologyTehranIran Mechanical Engineering Department University of Tennessee at ChattanoogaChattanoogaTN 37403USA

Recently,the topic of bioresorbable metals,with much focus on magnesium for bone implant applications,has been an area of considerable ***,it could be argued that magnesium is the most promising biodegradable material currently being studied for use as an orthopedic skeletal fixation and joint replacement ***,the fast degradation rate of magnesium-based materials in the physiological environment negatively affects their mechanical integrity and hence limits their biomedical *** most critical conditions may occur when the implant is subjected to a corrosive physiological environment and a fluctuating load during daily ***,numerous studies have been published on the synthesis,alloying,and coating of magnesium to control degradation rate and increase strength and *** the materials and strategies employed to achieve these goals,magnesium-based biocomposites have exhibited superior mechanical properties and acceptable ***,there is a lack of understanding of their corrosion and corrosion-fatigue *** understanding is necessary to qualify these new materials for various bio-implant *** this end,this paper reviews the recent advances in the corrosion and corrosion-fatigue behavior of magnesium-based *** also provides a comprehensive discussion of different factors that influence the biocompatibility,corrosion,fatigue,and corrosion-fatigue of magnesium-based biocomposites as potential implant *** study emphasizes that despite the abundance of various studies on the corrosion behavior of magnesium-based biocomposites,there is an imperative need for more fatigue and corrosion-fatigue studies.

关键词： Magnesium biocomposites Biodegradable implants Corrosion Fatigue Corrosion-fatigue

On null Controllability of fractional stochastic differential system with fractional Brownian motion

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Journal of Control and Decision 2021年第1期8卷 50-63页

作者： hamdy M.Ahmed Higher Institute of Engineering El-Shorouk AcademyEl-Shorouk CityCairoEgypt

In this paper,we are dealing with the null controllability of fractional stochastic differential system with fractional Brownian *** null controllability for Sobolev-type Hilfer fractional stochastic differential system with fractional Brownian motion of Clarke’s subdifferential type is *** sufficient conditions for null controllability of fractional stochastic differential system with fractional Brownian motion and control on the boundary are ***,an example is given to illustrate the obtained results.

关键词： Fractional Brownian motion Clarke subdifferential fractional stochastic differential system null controllability

Hilfer fractional neutral stochastic partial differential equations with delay driven by Rosenblatt process

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Journal of Control and Decision 2022年第2期9卷 226-243页

作者： hamdy M.Ahmed Higher Institute of Engineering El-Shorouk AcademyEI-Shorouk CityCairoEgypt

This manuscript is mainly focusing on the approximate controllability and the null controllability for fractional neutral stochastic partial differential equations with delay driven by Rosenblatt *** discuss the sufficient conditions for approximate controllability and null controllability for Hilfer fractional neutral stochastic partial differential equations driven by Rosenblatt ***,we provide two examples to verify the obtained results.

关键词： Hilfer fractional neutral stochastic integro-differential systems approximate controllability null controllability Rosenblatt process

Optimization of Deep Learning Model for Plant Disease Detection Using Particle Swarm Optimizer

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Computers, Materials & Continua 2022年第5期71卷 4019-4031页

作者： Ahmed Elaraby Walid hamdy Madallah Alruwaili Department of Computer Science Faculty of Computers and InformationSouth Valley UniversityQenaEgypt Department of Math. &Computer Science Faculty of SciencePort Said UniversityEgypt College of Computer and Information Sciences Jouf UniversitySakakaAljoufKingdom of Saudi Arabia

Plant diseases are a major impendence to food security,and due to a lack of key infrastructure in many regions of the world,quick identification is still *** losses owing to illnesses are a severe problem for both large farming structures and rural communities,motivating our *** of the large range of diseases,identifying and classifying diseases with human eyes is not only time-consuming and labor intensive,but also prone to being mistaken with a high error *** learning-enabled breakthroughs in computer vision have cleared the road for smartphone-assisted plant disease and *** proposed work describes a deep learning approach for detection plant ***,we proposed a deep learning model strategy for detecting plant disease and classification of plant leaf *** our research,we focused on detecting plant diseases in five crops divided into 25 different types of classes(wheat,cotton,grape,corn,and cucumbers).In this task,we used a public image database of healthy and diseased plant leaves acquired under realistic *** our work,a deep convolutional neural model AlexNet and Particle Swarm optimization was trained for this task we found that the metrics(accuracy,specificity,Sensitivity,precision,and Fscore)of the tested deep learning networks achieves an accuracy of 98.83%,specificity of 98.56%,Sensitivity of 98.78%,precision of 98.67%,and F-score of 98.47%,demonstrating the feasibility of this approach.

关键词： Deep neural networks plant diseases detection classification AlexNet PSO

Design of adaptive intuitionistic fuzzy controller for synchronisation of uncertain chaotic systems

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CAAI Transactions on Intelligence Technology 2020年第4期5卷 237-246页

作者： Mohamed hamdy Salah Helmy Mohamed Magdy Department of Industrial Electronics and Control Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf-32952Egypt Department of Mechatronics Engineering Higher Institute of Engineering and TechnologyEl-Mahalla El-Kobra-31951Egypt

This study presents the synchronisation between two non-linear Lorenz chaotic systems using an adaptive intuitionistic fuzzy controller(AIFC).This problem is solved in the presence of external disturbances and *** classes of Lorenz systems have been formulated one as the master and the other as the *** master and slave systems have different initial *** different initial conditions,both systems *** is called the butterfly effect that rules the behaviour of chaotic *** is chosen as a different method that has not been used before to synchronise the chaotic *** scaling factors of the inputs and the output of the intuitionistic fuzzy controller(IFC)are tuned using the artificial bee colony(ABC)algorithm depending on a specified objective *** IFC stability is studied when it is applied to synchronise the Lorenz *** simulation results achieved to assess the adequacy of the proposed control and to exhibit its dependability to synchronise the Lorenz system.

关键词： function. chaotic specified

Interstitial cells of Cajal, the Maestro in health and disease

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World Journal of Gastroenterology 2010年第26期16卷 3239-3248页

作者： Randa M Mostafa Yasser M Moustafa Hosam hamdy Department of Basic Medical Sciences College of Medicine Sharjah University Sharjah 27272 United Arab Emirates Department of Pharmacology and Toxicology College of Pharmacy Suez Canal University Ismaelia 24421 Egypt Department of Surgery Vice Chancellor of Medical and Health sciences Colleges Sharjah University Sharjah 27272 United Arab Emirates

Interstitial cells of Cajal (ICC) are important players in the symphony of gut motility. They have a very signif icant physiological role orchestrating the normal peristaltic activity of the digestive system. They are the pacemaker cells in gastrointestinal (GI) muscles. Absence, reduction in number or altered integrity of the ICC network may have a dramatic effect on GI system motility. More understanding of ICC physiology will foster advances in physiology of gut motility which will help in a future breakthrough in the pharmacological interventions to restore normal motor function of GI tract. This mini review describes what is known about the physiologic function and role of ICCs in GI system motility and in a variety of GI system motility disorders.

关键词： Interstitial cells of Cajal Gastrointestinal motility Peristalsis

Effect of Egyptian propolis on cryptosporidiosis in immunosuppressed rats with special emphasis on oocysts shedding,leukogram,protein profile and ileum histopathology

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Asian Pacific Journal of Tropical Medicine 2017年第3期10卷 240-248页

作者： hamdy Soufy Nadia M.El-Beih Soad M.Nasr Tamer H.Abd El-Aziz Fathia A.M.Khalil youssef F.Ahmed Hala A.A.Abou Zeina Department of Parasitology and Animal Diseases National Research Centre Department of Zoology Faculty of ScienceAin Shams University Department of Reproduction and Artificial Insemination National Research Centre

Objective:To investigate the activity of Egyptian propolis extracts(ethanol and water)on cryptosporidiosis in experimentally infected dexamethasone-immunosuppressed ***:A total of 180 male rats(190-220)g BWt were randomly divided into 9 equal groups(G1-G9).Groups of rats were kept as(G1):normal control,(G2-G9):immunosuppressed with dexamethasone and(G3-G9):infected with Cryptosporidium *** from(G4to G9)were given orally ethanol and water extract of propolis(at a dose of 50 mg/kg BWt)and nitazoxanide(standard anti-cryptosporidial drug at a dose of 100 mg/kg BWt)to infected rats with different *** pellets were collected from all groups to monitor oocysts shedding from the 2nd to the 15th day post *** the end of the experiment,blood was collected from all groups for determination of leukogram and serum *** specimens were also examined ***:The highest reduction of oocysts shedding in faecal samples was 88%in rats prophylactically treated with propolis ethanol extract at the 4th dpi,and in rats prophylactically treated with water extract of propolis,was91%at the 6th *** was a marked increase in neutrophils count and α_2-andβ-globulins levels in infected rats treated with both extracts,while a significant decrease was detected in lymphocytes compared to the infected non treated group.β-globulin level markedly increased in the rats administered *** changes were observed in the ileum of rats infected with ***:Egyptian propolis extracts have an activity on cryptosporidiosis in ***,propolis modulated the immunity in dexamethasone-immunosuppressed rats.

关键词： Cryptosporidiosis Propolis Rat model Leukogram Serum proteins Histopathology

Searching for the Random Walking microorganism cells

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International Journal of Biomathematics 2019年第6期12卷 43-54页

作者： Mohamed Abd Allah El-Hadidy hamdy MAbou-Gabalt Mathematics Statistics DepartmentCollege of ScienceTaibah UniversityYanbuKingdom of Saudi Arabia Mathematics Department Faculty of ScienceTanta UniversityTaniaEgypt

In this paper,we present a complex cooperative search technique for finding the Random Walking microorganism cells on one of n-intersect real lines at the *** have 2n unit speed searchers starting together from the ***,proving the existence of a finite search plan,we are discussing the existence of optimality for this search plan which minimizes the expected value of the first meeting time between one of the searchers and the microorganism cells.

关键词： Cooperative search technique one-dimensional Random Walking microor ganism cells optimal search plan.

Optimal Selection of Hybrid Renewable Energy System Using Multi-Criteria Decision-Making Algorithms

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Computers, Materials & Continua 2021年第8期68卷 2001-2027页

作者： Hegazy Rezk Irik Z.Mukhametzyanov Mujahed Al-Dhaifallah hamdy A.Ziedan College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityAl-Kharj11911KSA Department of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61517Egypt Center for Strategic and Interdisciplinary Research Ufa Federal Research Centre of the Russian Academy of SciencesUfa450054Republic of BashkortostanRussia Department of Systems Engineering King Fahd University of Petroleum&MineralsDhahran31261KSA Department of Electrical Engineering Faculty of EngineeringAssiut UniversityAssiut71518Egypt

Several models of multi-criteria decision-making(MCDM)have identified the optimal alternative electrical energy sources to supply certain load in an isolated region in Al-Minya City,*** load demand consists of water pumping system with a water desalination *** options containing three different power sources:only DG,PV-B system,and hybrid PV-DG-B,two different sizes of reverse osmosis(RO)units;RO-250 and RO-500,two strategies of energy management;load following(LF)and cycle charging(CC),and two sizes of DG;5 and 10 kW were taken into *** attributes,including operating cost,renewable fraction,initial cost,the cost of energy,excess energy,unmet load,breakeven grid extension distance,and the amount of CO_(2),were used during the evaluation *** estimate these parameters,HOMER®software was employed to perform both the simulation and optimization *** different weight estimation methods were considered;no priority of criteria,based on a pairwise comparisons matrix of the criteria,CRITIC-method,and entropy-based *** main findings(output results)confirmed that the optimal option for the case study was hybrid PV-DG-B with the following specification:5 kW DG,RO-500,and load following control *** this condition,the annual operating cost and initial costs were$5546 and$161022,respectively,whereas the cost of energy was 0.077$/*** excess energy and unmet loads were 40998 and 2371 kWh,*** breakeven grid extension distance and the amount of CO_(2) were 3.31 km and 5171 kg per year,*** with DG only,the amount of CO_(2) has been sharply reduced by 113939 kg per year.

关键词： Al-Minya city(Egypt) energy efficiency multi-criteria decision-making optimization renewable energy reverse osmosis units