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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

Childhood asthma biomarkers including zinc: An exploratory crosssectional study

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World Journal of Clinical Pediatrics 2024年第1期13卷 31-40页

作者： Hoda atef Abdelsattar ibrahim Mona Mohsen Boles Salep Aziz Hanna Dina Mahmoud Khaled Mohamed Abdelhamid El-Khashab Pediatric Clinical Nutrition Unit Faculty of MedicineCairo UniversityCairo 12613Egypt Department of Pediatrics Faculty of MedicineCairo UniversityCairo 12613Egypt Department of Clinical Pathology Faculty of MedicineCairo UniversityCairo 12613Egypt

BACKGROUND Childhood bronchial asthma(BA)is a chronic inflammatory respiratory *** conditions,including zinc deficiency,can affect such allergic *** To outline the difference in serum zinc levels between asthmatic children and healthy *** A cross-sectional study was carried out at Children’s Hospital,Cairo University,investigating serum zinc levels in children with BA(n=40)and healthy children(n=21).Other markers included serum ferritin,iron,hemoglobin(Hb),and immunoglobulin E(IgE)*** t-tests and Mann-Whinny tests were used for *** Kruskal-Wallis test was applied to compare serum ferritin and IgE levels with regard to asthma ***'s rank correlation was performed to explore the relationship between serum ferritin levels and both iron and Hb levels in asthmatic *** Children with BA had higher levels of zinc,yet the difference was not significant(P=0.115).Serum ferritin and IgE levels were significantly higher in asthmatic children(P=0.006 and 0.001,respectively),yet their levels did not differ significantly by severity(P=0.623 and 0.126,respectively).There was a nonsignificant weak correlation between serum ferritin levels and both serum iron and Hb *** Serum zinc levels do not seem to differ between asthmatic children and healthy *** ferritin levels may be a marker of asthma *** IgE levels are not markers of asthma severity.

关键词： Children Asthma Zinc Ferritin

Efect of early feeding practices and eating behaviors on body composition in primary school children

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World Journal of Pediatrics 2022年第9期18卷 613-623页

作者： Omneya Magdy Omar Mohamed Naguib Massoud Afaf Gaber ibrahim Nada atef Khalaf Department of Pediatrics Faculty of MedicineAlexandria UniversityAlexandria 21321Egypt Department of Community Medicine and Public Health Faculty of MedicineAlexandria UniversityAlexandriaEgypt

Background Understanding children’s feeding practices and eating behaviors is important to determine etiology of childhood *** study aimed to explore the relationship between early feeding practices,eating behavior and body composition among primary school *** The data were collected from 403 primary school *** were administered structured questionnaire,including sociodemographic characteristics,early feeding practices and Child’s Eating Behavior *** and blood pressure(BP)measurements were *** Children with obesity and overweight showed higher food approach subscales and lower food avoidance subscales compared to a healthy and underweight *** who were exclusively or predominantly breast fed during the frst 6 months had the lowest scores for the food approach subscales,food responsiveness(FR)and emotional overeating(EOE)and had the highest scores for the food avoidance subscales,satiety responsiveness(SR)and emotional under eating(EUE).Children who were introduced solid food after 6 months showed lower scores for FR,enjoyment of food and EOE but scored highest for SR,slowness in eating(SE)and *** anthropometric measurements were positively correlated with all food approach subscales and negatively with SE,SR and food *** food approach subscales were positively correlated with BP *** food avoidance subscales were negatively correlated with both BP percentiles,except for EUE,which was negatively correlated with diastolic BP percentile ***,SR,SE and FR were predictors for child body mass *** Early feeding practices and eating behavior are considered as prevention approaches for obesity.

关键词： Blood pressure Child eating behaviors Childhood obesity Feeding practices Waist circumference

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 EgyptDepartment of Biomedical TechnologyChildren with Special Needs National Research Center Dokki Cairo 12622 EgyptDepartment of Research on Children with Special Needs National Research Center Dokki Cairo 12622 EgyptDepartment of Biomedical TechnologyChildren with Special Needs National Research Center Dokki Cairo 12622 EgyptDepartment of Dermatology Venereology and Andrology Faculty of Medicine Al-Azhar University Cairo EgyptDepartment of Research on Children with Special Needs National Research Center Dokki Cairo 12622 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