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Optimizing Connections:Applied Shortest Path Algorithms for MANETs

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 787-807页

作者： ibrahim Alameri Jitka Komarkova Tawfik Al-Hadhrami Abdulsamad Ebrahim Yahya atef Gharbi Faculty of Medical Sciences Jabir Ibn Hayyan Medical UniversityAlkufaNajaf54001Iraq Faculty of Economics and Administration University of PardubiceStudentskaPardubice53210Czech Republic Computer Science Department School of Science and TechnologyNottingham Trent UniversityNottinghamNG118NSUK Department of Information Technology College of Computing and Information TechnologyNorthern Border UniversityArar91431Saudi Arabia Department of Information System College of Computing and Information TechnologyNorthern Border UniversityArar91431Saudi Arabia

This study is trying to address the critical need for efficient routing in Mobile Ad Hoc Networks(MANETs)from dynamic topologies that pose great challenges because of the mobility of *** objective was to delve into and refine the application of the Dijkstra’s algorithm in this context,a method conventionally esteemed for its efficiency in static ***,this paper has carried out a comparative theoretical analysis with the Bellman-Ford algorithm,considering adaptation to the dynamic network conditions that are typical for *** paper has shown through detailed algorithmic analysis that Dijkstra’s algorithm,when adapted for dynamic updates,yields a very workable solution to the problem of real-time routing in *** results indicate that with these changes,Dijkstra’s algorithm performs much better computationally and 30%better in routing optimization than Bellman-Ford when working with configurations of sparse *** theoretical framework adapted,with the adaptation of the Dijkstra’s algorithm for dynamically changing network topologies,is novel in this work and quite different from any traditional *** adaptation should offer more efficient routing and less computational overhead,most apt in the limited resource environment of ***,from these findings,one may derive a conclusion that the proposed version of Dijkstra’s algorithm is the best and most feasible choice of the routing protocol for MANETs given all pertinent key performance and resource consumption indicators and further that the proposed method offers a marked improvement over traditional *** paper,therefore,operationalizes the theoretical model into practical scenarios and also further research with empirical simulations to understand more about its operational effectiveness.

关键词： Dijkstra’s algorithm optimization complexity analysis shortest path first comparative algorithm analysis nondeterministic polynomial(NP)-complete

Enhancing Network Design through Statistical Evaluation of MANET Routing Protocols

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Computers, Materials & Continua 2024年第7期80卷 319-339页

作者： ibrahim Alameri Tawfik Al-Hadhrami Anjum Nazir Abdulsamad Ebrahim Yahya atef Gharbi Faculty of Medical Sciences Jabir ibn Hayyan Medical UniversityAlkufa QuNajaf54001Iraq Computer Science Department School of Science and TechnologyNottingham Trent UniversityNottinghamNG118NSUK Department of Computing Faculty of Engineering Sciences&Technology(FEST)Hamdard UniversityKarachi74600Pakistan Department of Information Technology College of Computing and Information TechnologyNorthern Border UniversityArar91431Saudi Arabia Department of Information System College of Computing and Information TechnologyNorthern Border UniversityArar91431Saudi Arabia

This paper contributes a sophisticated statistical method for the assessment of performance in routing protocols salient Mobile Ad Hoc Network(MANET)routing protocols:Destination Sequenced Distance Vector(DSDV),Ad hoc On-Demand Distance Vector(AODV),Dynamic Source Routing(DSR),and Zone Routing Protocol(ZRP).In this paper,the evaluation will be carried out using complete sets of statistical tests such as Kruskal-Wallis,Mann-Whitney,and *** articulates a systematic evaluation of how the performance of the previous protocols varies with the number of nodes and the mobility *** study is premised upon the Quality of Service(QoS)metrics of throughput,packet delivery ratio,and end-to-end delay to gain an adequate understanding of the operational efficiency of each protocol under different network *** findings explained significant differences in the performance of different routing protocols;as a result,decisions for the selection and optimization of routing protocols can be taken effectively according to different network *** paper is a step forward in the general understanding of the routing dynamics of MANETs and contributes significantly to the strategic deployment of robust and efficient network infrastructures.

关键词： Routing protocols statistical approach friedman MANET

Exact Solutions of Nonlinear Evolution Equations in Mathematical Physics Using the Modified Simple Equation Method

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Chinese Physics Letters 2012年第6期29卷 1-4页

作者： E.M.E.Zayed S.A.hoda ibrahim Department of Mathematics Faculty of ScienceZagazig UniversityP.O.Box 44519ZagazigEgypt

The modified simple equation method is employed to construct the exact solutions involving parameters of nonlinear evolution equations via the (1+1)-dimensional modified KdV equation,and the (1+1)-dimensional reaction-diffusion *** these parameters are taken to be special values,the solitary wave solutions are derived from the exact *** is shown that the proposed method provides a more powerful mathematical tool for solving nonlinear evolution equations in mathematical physics.

关键词： equation. exact equation

Exact Solutions of Kolmogorov-Petrovskii-Piskunov Equation Using the Modified Simple Equation Method

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Acta Mathematicae Applicatae Sinica 2014年第3期30卷 749-754页

作者： E.M.E.Zayed S.A.hoda ibrahim Mathematics Department Faculty of ScienceZagazig University

The modified simple equation method is employed to find the exact solutions of the nonlinear Kolmogorov-Petrovskii-Piskunov （KPP） equation. When certain parameters of the equations are chosen to be special values, the solitary wave solutions are derived from the exact solutions. It is shown that the modified simple equation method provides an effective and powerful mathematical tool for solving nonlinear evolution equations in mathematical physics.

关键词： modified simple equation method Kolmogorov-Petrovskii-Piskunov equation exact solutions solitary wave solutions

Health problems among street children seeking care in the Center for Social and Preventive Medicine in Egypt

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World Journal of Pediatrics 2017年第5期13卷 503-507页

作者： hoda ibrahim Rizk Nihal Mohamed El Rifai Hana Mohamed Aboulghar Public Health and Community Medicine Department Faculty of MedicineCairo UniversityCairoEgypt Pediatrics Department Faculty of MedicineCairo UniversityCairoEgypt

Background:In Egypt,around 1 million children are on the *** children's health is an issue that is not well *** objective of the current study was to determine the health problems of a targeted group of street children seeking medical care and to generate a hypothesis about the positive/negative role of street children care ***:A cross-sectional study was done on 2169 street children who sought medical care at El-Basma clinic at the Center for Social and Preventive Medicine in Cairo University Children Hospital from January 2011 to July ***:Respiratory illnesses and skin problems were the most prevalent conditions,affecting 485 (22.4%) and 359 (16.6%) of the patients,*** issues and trauma were significantly higher among the adolescent *** and gastrointestinal problems were significantly higher among children aged less than 2 *** and cardiac problems were significantly higher among those referred from organizations whereas trauma was significantly higher among those coming directly from the streets.A significant proportion of children at the extremes of the studied age spectrum were coming directly from the *** transmitted infections were rare ***:Respiratory and skin diseases were the major morbidity problems among street children,especially adolescent *** afforded opportunities for access to different health care services.

关键词： Egypt health problems street children

Chitosan/Nanocrystalline Cellulose Biocomposites Based on Date Palm (Phoenix Dactylifera L.) Sheath Fibers

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Journal of Renewable Materials 2019年第6期7卷 567-582页

作者： Abeer M.Adel Amira M.El-Shafei atef A.ibrahim Mona T.Al-Shemy Cellulose and Paper Department National Research Center33El-Bohouth St.(Former El-Tahrir St.)DokkiP.O.12622GizaEgypt Textile Research Division National Research Center33El-Bohouth St.(Former El-Tahrir St.)DokkiP.O.12622GizaEgypt

In this study,nanocrystalline celluloses were used to enhance physical,mechanical and water vapor barrier properties of chitosan films for potential food packaging *** different mineral acids(sulfuric and phosphoric)were used to extract nanocrystalline cellulose from date palm sheath *** influence of cellulose I and cellulose II on the properties of the isolated nanocrystalline celluloses(e.g.,yield,energy and length of intra-and intermolecular hydrogen bonds,and degree of substitution)were studied *** characteristics of chitosan biocomposite film with phosphorylated nanocrystalline cellulose were compared to those with sulfated nanocrystalline *** showed that besides cellulose polymorphism,the ionic ester groups on the surface of nanocrystalline cellulose is one of the factors influencing the physical,chemical,mechanical,and water vapor barrier properties in chitosan/nanocrystalline cellulose biocomposites.

关键词： Biocomposite Cellulose I Cellulose II Nanocrystalline cellulose(NCC) physico-mechanical properties Thermal stability

Molecular study on Y chromosome microdeletions in Egyptian males with idiopathic infertility

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Asian Journal of Andrology 2004年第1期6卷 53-57页

作者： Mostafa K. El Awady Sohair F. El Shater Ehab Ragaa Khaled atef ibrahim M. Shaheen Nagwa A. Megiud Department of Biomedical Technology Children with Special Needs National Research Center Dokki Cairo 12622 Egypt Department of Research on Children with Special Needs National Research Center Dokki Cairo 12622 Egypt Department of Dermatology Venereology and Andrology Faculty of Medicine Al-Azhar University Cairo Egypt

Aim: To determine the frequency of genetic deletions within the azoospermia factors in Egyptian infertile males. Methods: The Yq microdeletions in 33 infertile males with undetectable chromosomal anomalies were examined by mutiplex polymerase chain reaction (PCR). Deletions were confirmed using single PCR amplifications. Results: Four out of the total 33 (12 %) men had Yq11 microdeletions, thus supporting the average reported figures in other populations. Three of those 4 cases had single short tandem sequence deletions with discrete histological findings of their testes. Single sY272 deletion within AZFc was associated with Sertoli cell only syndrome, whereas a patient with isolated sY84 deletion within AZFa had immature testicular structure. The remaining case had a large deletion in AZFa-c and short stature. Conclusion: The present study supports the hypothesis that the Yqn encompasses genetic determinants of stature besides genes controlling spermatogenesis.

关键词： AZF Y microdeletions multiplex polymerase chain reaction male infertility azoospermia

A Retrospective Study of Clinicoepidemiological Aspects of Nasopharyngeal Cancer at NCI-Cairo (2000-2010)

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Journal of Cancer Therapy 2015年第11期6卷 971-980页

作者： Hebatallah K. ibrahim Tarek Shouman Azza Niazy Taher Azza M. Nasr Hesham atef Radiation Oncology Department National Cancer Institute Cairo University Cairo Egypt Clinical Oncology Department Faculty of Medicine Cairo University Cairo Egypt

Aim of Work: The aim of this work was to study the clinico-epidemiological characteristics of the patients with nasopharyngeal carcinoma (NPC), analyse the prognostic factors of the disease and to analyse the results of different treatment modalities and their effect on loco-regional, distal metastatic disease control and both overall survival (OS) and disease free survival (DFS) rates. Patients and Methods: This is a retrospective study reviewing all adult nasopharyngeal carcinoma (NPC) patients who presented to the radiotherapy department—National Cancer Institute Cairo University in the period from (2000-2010). Results: In this study, it was found that the mean age was 45 years;most of the patients were of locally advanced stages. Multivariate cox proportional hazards regression identified T-stage, radiotherapy course completion & addition of chemotherapy as independent prognostic factors for local control (LC), DFS, & OS. The 5-year LC, DFS and OS rates for all studied patients were 38.2%, 33.5% & 37.2% respectively. The median DFS was 26 months and median OS was 36.5 months. Conclusion: This study matches the published data that support that radical concurrent chemoradiation is the mainstay of treatment of locally advanced NPC, & that T-stage, M-stage, prescribed dose completion, response to initial treatment are independent prognostic factors for survival. All measures should be taken to improve the local response during primary treatment as this will improve survival rates of patients with NPC.

关键词： Nasopharyngeal Cancer Radiotherapy

Chemical and Biological Comparative <i>in Vitro</i>Studies of Cinnamon Bark and Lemon Peel Essential Oils

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Food and Nutrition Sciences 2017年第1期8卷 110-125页

作者： Eman M. Elgendy hoda S. ibrahim Hanaa F. Elmeherry Amal G. Sedki Faten U. Mekhemer Department of Home Economy Faculty of Specific Education Mansoura University Mansoura Egypt Department of Nutrition and Food Science Faculty of Home Economics Helwan University Cairo Egypt Department of Home Economy Faculty of Specific Education Tanta University Tanta Egypt

Cinnamon and lemon are the oldest plants which possess a rising popularity due to their therapeutic potential from centuries. Cinnamomum zeylanicum and lemon (Citrus lemon L.) have been subjected to extensive research. Their essential oils were extracted by steam distillation from selected plants and their chemical compositions were determined by the GC-MS system. Cinnamon and lemon essential oils were examined for antioxidant activity by ABTS method which showed the ability to inhibit lipid per-oxidation. On the other hand, in antimicrobial investigations, cinnamon and lemon essential oils have inhibitory effect against Gram positive bacteria (Staphylococcus aureus) and Gram negative bacteria (Escherichia coli) using Muller Hinton agar medium. The essential oils of cinnamon and lemon showed antifungal effects which were tested against (Candida albicans). The volatile oil of cinnamon bark has been found to be highly effective against all the tested bacteria and fungi. However, lemon peel essential oil has shown medium inhibition for Gram positive bacteria (Staphylococcus aureus). On the other hand, the cytotoxic activities of the essential oils were tested on hepatocellular carcinoma and colorectal carcinoma. Essential oils have shown good activities on the cell lines. Essential oil of cinnamon showed more inhibition rate than essential oil of lemon. This study reported the importance of both cinnamon and lemon volatile oils and recommends that cinnamon and lemon can be used as an active therapy for humans.

关键词： Cinnamon Lemon Essential Oil Cinnamaldehyde Limonene