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Spectroscopic and Fluorescence Studies on the Trivalent Ce,Eu,Nd and La metal Ions Rhodamine CFlorescent Dye Complexes

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光谱学与光谱分析 2021年第10期41卷 3311-3315页

作者： moamen S.Refat mahmoud Salman Akram m.el-Didamony Hammad Fetooh Eman S.E.Abd el-maksoud mohamed Y.el-sayed Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry Faculty of ScienceAl-Hussein Bin Talal UniversityP.O.Box 20 Ma’anJordan Department of Chemistry Faculty of ScienceZagazig UniversityEgypt Chemistry Department College of ScienceJouf UniversityP.O.Box:2014 SakakaSaudi Arabia

The four isolates solid complexes:[La(RHC)(NO_(3))_(2)]·3H_(2)O,[Nd(RHC)(NO_(3))_(2)]·4H_(2)O,[Eu(RHC)(NO_(3))_(2)]·2H_(2)O,and[Ce(RHC)(NO_(3))_(2)]·5H_(2)O that obtained by the reaction of the nitrate salts of the Ce(Ⅲ),Eu(Ⅲ),Nd(Ⅲ)and La(Ⅲ)ions and rhodamie C(RHC)ligand were interpretative using elemental analysis(C,H and N),molar conductivity,infrared,electronic,fluorescence and 1H-NmR spectra to achieve the speculated suitable *** low molar conductance values of the synthesized RHC complexes concluded the non-electrolytic *** infrared spectra recorded the absence of stretching vibrationν(OH)of the—COOH and presence of two new vibration bands at 1597~1601 and 1383~1399 cm^(-1)which were assigned toνas(COO-)andνs(COO-).The difference between them revealed that the carboxylate group acts as a bidentate ligand.1HNmR spectra of Europium and lanthanum(Ⅲ)complexes were supported the FTIR results based on the absent of proton of the carboxylic ***,the microanalytical and spectroscopic results deduced that RHC acts as a monobasic bidentate ligand,and coordinated to the central metal(Ⅲ)ions via the two oxygen atoms of deprotonated carboxylic *** studies were performed on the metal complexes of Ce^(3+),Tb^(3+),Th^(4+),Gd^(3+)and La^(3+),that referred a quenching in the fluorescene intensity of rhodamine C in the aqueous state after *** antimicrobial assessment against some kind of bacteria and fungi were also checked and recorded enhancement in case of their complexes.

关键词： Rhodamine C Chelation Spectroscopic Thermogravimetric Lanthanides

Study of enteropathogens associated with paediatric gastroenteritis

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Asian Pacific Journal of Tropical medicine 2009年第3期2卷 63-69页

作者： maysaa el sayed Zaki Clinical Pathology Faculty of MedicineMansoura UniversityEgyt

Objective:To determine the etiology of acute diarrhea in children under 5 years of age and to improve- knowledge of the etiology of gastrointestinal pathogens using traditional and molecular diagnostic ***: Various common enteropathogens(viral,bacterial and parasites) associated with diarrhea were investigated by conventional and molecular techniques(PCR) for verotoxin present in Escherichia coli in 218 children less than 5 years of age admitted to mansoura University Children hospital- ***:The occurrence of enteropathogens identified was as follows:*** O157:H7 38.8%followed by Salmonella Spp 29.4%,Aeromonas 20%and Shigella Spp 11.8%.Rotavirus was found in of samples 17.1%.Rotavirus was statistically significant in agemmonest parasites found were *** followed by Enterobius vermicularis, Giardia lambia,Hymenolepis nana and *** and Salmonella isolates were tested for their susceptibility to common antimicrobial agents and most of the isolates were resistant to ampicillin and trimethoprim /***:This study demonstrated that rotavirus,*** O157:H7,Salmonella Spp,and Aeromonas were significant *** was significantly associated with infantile *** results highlight the value of using a combination of traditional and PCR techniques in the diagnosis of enteropathogens related to acute gastroenteritis in children.

关键词： Acute diarrhea Children Parasites Bacteria

A Suitable Active Control for Suppression the Vibrations of a Cantilever Beam

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Sound & Vibration 2022年第2期56卷 89-104页

In our consideration,a comparison between four different types of controllers for suppression the vibrations of the cantilever beam excited by an external force is carried *** four types are the linear velocity feedback control,the cubic velocity feedback control,the non-linear saturation controller(NSC)and the positive position feedback(PPF)*** suitable type is the PPF controller for suppression the vibrations of the cantilever *** approximate solution obtained up to the first approximation by using the multiple scale *** PPF controller effectiveness is studied on the *** used frequency-response equations to investigate the stability of a cantilever *** notified that,there is a good agreement between the analytical solution and the numerical solution.

关键词： Cantilever beam cubic velocity feedback control linear velocity feedback control non-linear saturation controller(NSC) positive position feedback(PPF)controller

An Improved Enterprise Resource Planning System Using machine Learning Techniques

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Journal of Software Engineering and Applications 2024年第5期17卷 203-213页

作者： Ahmed Youssri Zakaria elsayed Abdelbadea Atef Raslan Tarek Ali mervat Gheith Al-sayed Khater Essam A. Amin Department of Software Engineering Faculty of Graduate Studies for Statistical Research (FGSSR) Cairo University Giza Egypt

Traditional Enterprise Resource Planning (ERP) systems with relational databases take weeks to deliver predictable insights instantly. The most accurate information is provided to companies to make the best decisions through advanced analytics that examine the past and the future and capture information about the present. Integrating machine learning (mL) into financial ERP systems offers several benefits, including increased accuracy, efficiency, and cost savings. Also, ERP systems are crucial in overseeing different aspects of Human Capital management (HCm) in organizations. The performance of the staff draws the interest of the management. In particular, to guarantee that the proper employees are assigned to the convenient task at the suitable moment, train and qualify them, and build evaluation systems to follow up their performance and an attempt to maintain the potential talents of workers. Also, predicting employee salaries correctly is necessary for the efficient distribution of resources, retaining talent, and ensuring the success of the organization as a whole. Conventional ERP system salary forecasting methods typically use static reports that only show the system’s current state, without analyzing employee data or providing recommendations. We designed and enforced a prototype to define to apply mL algorithms on Oracle EBS data to enhance employee evaluation using real-time data directly from the ERP system. Based on measurements of accuracy, the Random Forest algorithm enhanced the performance of this system. This model offers an accuracy of 90% on the balanced dataset.

关键词： ERP HCm machine Learning Employee Performance Pythonista Pythoneer

Development and Validation of a Scaled electric Combat Vehicle Tire model

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World Journal of Engineering and Technology 2024年第1期12卷 24-39页

作者： Haniyeh Fathi Aricha mehrotra Zeinab el-Sayegh Department of Automotive and mechatronics Engineering Ontario Tech University Oshawa Canada

Pneumatic tire modeling and validation have been the topic of several research papers, however, most of these papers only deal with pneumatic passenger and truck tires. In recent years, wheeled-scaled vehicles have gained lots of attention as a feasible testing platform, nonetheless up to the authors’ knowledge there has been no research regarding the use of scaled tires and their effect on the overall vehicle performance characteristics. This paper presents a novel scaled electric combat vehicle tire model and validation technique. The pro-line lockdown tire size 3.00 × 7.35 is modeled using the Finite element Analysis (FEA) technique and several materials including layered membrane, beam elements, and mooney-Rivlin for rubber. The tire-rim assembly is then described, and the rigid body analysis is presented. The tire is then validated using an in-house custom-made static tire testing machine. The tire test rig is made specifically to test the pro-line tire model and is designed and manufactured in the laboratory. The tire is validated using vertical stiffness and footprint tests in the static domain at different operating conditions including several vertical loads. Then the tire is used to perform rolling resistance and steering analysis including the rolling resistance coefficient and the cornering stiffness. The analysis is performed at different operating conditions including longitudinal speeds of 5, 10, and 15 km/h. This tire model will be further used to determine the tractive and braking performance of the tire. Furthermore, the tire test rig will also be modified to perform cornering stiffness tests.

关键词： Tire modeling Tire Testing machine Vehicle Dynamics Unmanned Vehicle modeling Finite element Analysis Tire mechanics

Assessing the Water-Energy-Food-Ecosystems Nexus in Smart Irrigation: A Potato Farming Case Study in Lebanon

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Journal of Geoscience and Environment Protection 2024年第8期12卷 80-96页

作者： Ali Karnib Hammou Laamrani Jauad el Kharraz Liberal Education Department Lebanese American University Beirut Lebanon United Nations ESCWA Beirut Lebanon Regional Center for Renewable Energy & Energy Efficiency (RCREEE) Cairo Egypt

This study examines the Water-Energy-Food-Ecosystems (WEFE) nexus in Lebanese agriculture, with a focus on the shift from conventional surface irrigation techniques to advanced smart irrigation systems in the Bekaa region, specifically targeting potato cultivation. The study quantitatively analyzes the interaction among water, energy, and agricultural outputs at the farm scale using the WEFE Nexus framework for scenario analysis. It evaluates variations in water productivity, environmental effects, and economic outcomes, offering a detailed view of existing practices and their sustainable improvement potential. The WEFE Nexus assessment demonstrates that smart irrigation integration significantly decreased resource usage: water consumption was reduced by 58%, diesel fuel use for irrigation dropped by 57%, and the demand for labor and fertilizers decreased by 47% and 49%, respectively. This change led to enhanced crop yields and increased resource efficiency, demonstrating the potential of smart irrigation as a transformative strategy for sustainable agriculture in Lebanon and other arid areas. Economic analysis showed that farmers could recover the costs of installing the smart irrigation system within 3 months. The findings highlight the need for further research on integrating smart irrigation with renewable energy, showing potential for sustainable agricultural development. .

关键词： Water-Energy-Food-Ecosystems Nexus Sustainable Agriculture Smart Irrigation Q-Nexus model

Rational design of natural leather-based water evaporator for electricity generation and functional applications

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Journal of Energy Chemistry 2024年第9期96卷 129-144页

作者： Bingyuan Zhang Xiaoyu Guan Qingxin Han Haoxiang Guo Sai Zheng Xuhui Sun Afnan H.el-Gowily mohammed A.Abosheasha Yanxia Zhu motoki Ueda meng An Haojun Fan Yoshihiro Ito College of Bioresources Chemical and materials Engineering Key Laboratory of Auxiliary Chemistry and Technology for Chemical IndustryMinistry of EducationShaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and TechnologyShaanxi University of Science&TechnologyXi'an 710021ShaanxiChina Nano medical Engineering Laboratory RIKEN Cluster for Pioneering Research2-1 HirosawaWako 351-0198SaitamaJapan Key Laboratory of Leather Chemistry and Engineering(Sichuan University) Ministry of EducationChengdu 610065SichuanChina College of mechanical and electrical Engineering Shaanxi University of Science&TechnologyXi'an 710021ShaanxiChina Biochemistry Division Chemistry DepartmentFaculty of ScienceTanta UniversityTanta 31527Egypt

In recent years,water evaporation-induced electricity has attracted a great deal of attention as an emerging green and renewable energy harvesting *** abundant materials have been developed to fabricate hydrovoltaic devices,the limitations of high costs,inconvenient storage and transport,low environmental benefits,and unadaptable shape have restricted their wide ***,an electricity generator driven by water evaporation has been engineered based on natural biomass leather with inherent properties of good moisture permeability,excellent wettability,physicochemical stability,flexibility,and *** numerous nano/microchannels together with rich oxygen-bearing functional groups,the natural leather-based water evaporator,Leather_(Emblic-NPs-SA/CB),could continuously produce electricity even staying outside,achieving a maximum output voltage of∼3 V with six-series ***,the leather-based water evaporator has enormous potential for use as a flexible self-powered electronic floor and seawater demineralizer due to its sensitive pressure sensing ability as well as its excellent photothermal conversion efficiency(96.3%)and thus fast water evaporation rate(2.65 kg m^(−2)h^(−1)).This work offers a new and functional material for the construction of hydrovoltaic devices to harvest the sustained green energy from water evaporation in arbitrary ambient environments,which shows great promise in their widespread applications.

关键词： Energy conversion Water evaporation-induced electricity Functional leather Flexible self-powered sensor Desalination

Review on friction stir welding of dissimilar magnesium and aluminum alloys: Scientometric analysis and strategies for achieving high-quality joints

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Journal of magnesium and Alloys 2023年第11期11卷 4082-4127页

作者： mohamed m.Z.Ahmed mohamed m.el-sayed Seleman Dariusz Fydrych Gürel ÇAm Department of mechanical Engineering College of Engineering at Al KharjPrince Sattam Bin Abdulaziz UniversityAl Kharj 11942Saudi Arabia Department of metallurgical and materials Engineering Faculty of Petroleum and Mining EngineeringSuez UniversitySuez 43512Egypt Faculty of mechanical Engineering and Ship Technology Institute of Machines and Materials TechnologyGdańsk University of TechnologyGabriela Narutowicza Street 11/12Gdańsk 80-233Poland Department of mechanical Engineering Iskenderun Technical UniversityIskenderunHatay 31200Turkiye

magnesium and aluminum alloys continually attract interest as lightweight structural materials for transport applications. However, joining these dissimilar alloys is very challenging. The main obstacle that hinders progress in dissimilar mg-Al joining is the formation of brittle intermetallic compounds(ImCs). As a solid-state joining technique, FSW is an excellent candidate to attenuate the deleterious ImC effects in dissimilar Al-mg joining due to the inherent low heat inputs involved in the process. However, the ImCs, namely Al_(3)mg_(2) and Al_(12)mg_(17) phases, have also been reported to form during Al-mg dissimilar FSW;their amount and thickness depend on the heat input involved;thus,the weld parameters used. Since the heat dissipated in the material during the welding process significantly affects the amount of ImCs,the heat input during FSW should be kept as low as possible to control and reduce the amount of ImCs. This review aims to critically discuss and evaluate the studies conducted in the dissimilar Al/mg FSW through a scientometric analysis and also with a focus on the strategies recently applied to enhance joint quality. The scientometric analysis showed that the main research directions in mg/Al FSW are the technological weldability of aluminum and magnesium during FSW, structural morphology, and mechanical properties of dissimilar welded joints. Considering the scope of application of the aforementioned joints, the low share of articles dealing with environmental degradation and operational cracking is surprising. This might be attributed to the need for well-developed strategies for obtaining high-quality and sustainable joints for applications. Thus, the second part of this review is conventional, focusing mainly on the new strategies for obtaining high-quality mg/Al joints. It can be concluded that in addition to the necessity to optimum welding parameters to suppress the excessive heat to limit the amount and thickness of ImC formed and improv

关键词： Friction stir welding(FSW) Al-alloys mg-alloys Dissimilar material welding Intermetallics Weld performance

Digital Twin-Based Automated Fault Diagnosis in Industrial IoT Applications

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Computers, materials & Continua 2023年第4期75卷 183-196页

作者： Samah Alshathri Ezz el-Din Hemdan Walid el-Shafai Amged sayed Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Science and Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Computer Science Department Security Engineering LabPrince Sultan UniversityRiyadh11586Saudi Arabia Department of electronics and electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of Industrial electronics and Control Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of electrical Energy Engineering College of Engineering&TechnologyArab Academy for Science Technology&Maritime TransportSmart Village CampusEgypt

In recent years, Digital Twin (DT) has gained significant interestfrom academia and industry due to the advanced in information technology,communication systems, Artificial Intelligence (AI), Cloud Computing (CC),and Industrial Internet of Things (IIoT). The main concept of the DT isto provide a comprehensive tangible, and operational explanation of anyelement, asset, or system. However, it is an extremely dynamic taxonomydeveloping in complexity during the life cycle that produces a massive amountof engendered data and information. Likewise, with the development of AI,digital twins can be redefined and could be a crucial approach to aid theInternet of Things (IoT)-based DT applications for transferring the data andvalue onto the Internet with better decision-making. Therefore, this paperintroduces an efficient DT-based fault diagnosis model based on machinelearning (mL) tools. In this framework, the DT model of the machine isconstructed by creating the simulation model. In the proposed framework,the Genetic algorithm (GA) is used for the optimization task to improvethe classification accuracy. Furthermore, we evaluate the proposed faultdiagnosis framework using performance metrics such as precision, accuracy,F-measure, and recall. The proposed framework is comprehensively examinedusing the triplex pump fault diagnosis. The experimental results demonstratedthat the hybrid GA-mL method gives outstanding results compared to mLmethods like LogisticRegression (LR), Na飗e Bayes (NB), and SupportVectormachine (SVm). The suggested framework achieves the highest accuracyof 95% for the employed hybrid GA-SVm. The proposed framework willeffectively help industrial operators make an appropriate decision concerningthe fault analysis for IIoT applications in the context of Industry 4.0.

关键词： Automated fault diagnosis control system mL AI CC IIoT digital twins genetic algorithm GA-mL technique