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Quantum Distribution Functions for Dusty Plasma in Saturn’s Rings by Using Curvilinear Coordinates

International Journal of Astronomy and Astrophysics 2019年第2期9卷 115-132页

作者： nagat abd el rahman hussein abd el-Rahim Hassan Ahmed Esraa Gamal Sayed Mathematics Department Faculty of Science Assiut University Assiut Egypt Mathematics Department Faculty of Science Al-Azhar University Assiut Egypt

This study aims to estimate the quantum Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy in curvilinear coordinates. We used the results to calculate the quantum binary and triplet distribution functions in curvilinear coordinates. The analytical form of the quantum distribution functions was obtained for dusty plasma in Saturn’s rings model. We use particles-in-cell (PIC) simulations to find a visualization of dusty three-component plasma phase space in curvilinear coordinates. Our results were compared with others.

关键词： Dusty Plasma Binary and Triplet Distribution Functions Three Component Plasma BBGKY Hierarchy

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Review:Development of lanthanum strontium cobalt ferrite composite cathodes for intermediate-to low-temperature solid oxide fuel cells

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第1期14卷 11-24页

作者： Nurul Akidah BAHARUDDIN Hamimah abd rahman Andanastuti MUCHTAR Abu Bakar SULONG Huda abdULLAH Fuel Cell Institute Universiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia86400 BatuPahatJohorMalaysia Department of Mechanical and Materials Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Department of electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia

Solid oxide fuel cells(SOFCs) offer high energy conversion,low noise,low pollutant emission,and low processing *** many advantages,SOFCs face a major challenge in competing with other types of fuel cells because of their high operating *** necessity to reduce the operational temperature of SOFCs has led to the development of research into the materials and fabrication technology of fuel *** use of composite cathodes significantly reduces the cathode polarization resistance and expands the triple phase boundary area available for oxygen *** preparation and composite cathode fabrication also affect the overall performance of composite cathodes and fuel *** many types of cathode materials,lanthanum-based materials such as lanthanum strontium cobalt ferrite(La1-xSrxCo1-yFeyO3- have recently been discovered to offer great compatibility with ceria-based electrolytes in performing as composite cathode materials for intermediate-to low-temperature SOFCs(IT-LTSOFCs).This paper reviews various ceria-based composite cathodes for IT-LTSOFCs and focuses on the aspects of progress and challenges in materials technology.

关键词：英文摘要编辑工作优秀论文医学期刊

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Prediction Flashover Voltage on Polluted Porcelain Insulator Using ANN

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Computers, Materials & Continua 2021年第9期68卷 3755-3771页

作者： Ali Salem Rahisham abd-rahman Waheed Ghanem Samir Al-Gailani Salem Al-Ameri Faculty of electrical and electronic Engineering University Tun Hussein Onn MalaysiaJohor86400Malaysia Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia TerengganuKuala Terengganu21030Malaysia School of electrical and electronic Engineering Universiti Sains MalaysiaNibong Tebal14300Malaysia Department of electrical and electronics Engineering Faculty of EngineeringAl-Madinah International UniversityKuala Lumpur57100Malaysia

This paper aims to assess the effect of dry band location of contaminated porcelain insulators under various flashover voltages due to *** locations of dry bands are proposed to be tested under different severity of contamination artificially produce using salt deposit density(SDD)sprayed on an *** tests of polluted insulators under proposed scenarios have been *** flashover voltage of clean insulators has been identified as a reference value to analyze the effect of contamination distribution and its *** dry band dimension has been taken into consideration in experimental *** flashover voltage has been predicted using an artificial neural network(ANN)technique based on the laboratory test *** ANN approach is constructed with five input data(geometry the insulator and parameters of contamination)and flashover voltage as the output of the *** indicated that the pollution distribution based on the proposed scenario has a significant influence on the flashover voltage *** of the ANN model reveals that the relative error values between the experimental results and the prediction appeared to be within 5%.This indicates the significant efficiency of the ANN technique in predicting the flashover voltage insulator under test.

关键词： Insulator pollution distribution artificial neural network dry band

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患上消化道疾病的埃及患者中分离幽门螺杆菌的基因型表征(英文)

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The Chinese-German Journal of Clinical Oncology 2012年第1期11卷 15-23页

作者： abdel Hamid hussein Ezzat Mona Hamza Ali Eman Ahmed el-Seidi Iman Ezzat Wali Nagwa abd el rahman Sedky Sherif Medhat Mahmoud Naguib Department of Surgical Oncology National Cancer Institute Cairo University Laboratory Forensic Medicine Egyptian Ministry of Justice Medical Microbiology and Immunology Faculty of Medicine Cairo University Internal Medicine Faculty of Medicine Cairo University

Objective:Over 50% of the world populations are infected with Helicobacter pylori (H. pylori). Most subjects are asymptomatic;however, in 1994, H. pylori has been categorized as group I carcinogen. The aim of the study was to investigate the relationship between H. pylori infection and gastric cancer. Methods:Thirty gastric cancer patients (GCs) and 30 gastritis patients were enrolled in the study. H. pylori was cultured on non-selective and selective medias, infection density was assessed by quantitative culture. Antibiotic sensitivity testing was performed. PCR was done for the H. pylori 16S rRNA gene in addition to cagA, vacA and iceA genes. Results:H. pylori could be cultured from 100% of specimens obtained from all patients. The density of H. pylori was higher in cancer cases than in gastritis patients. The 16S rRNA was detected in all GC patients (100%) while it was only detected in 70% of gastritis patients. The cagA gene was found in 53.3% vs 13.3% of GC and gastritis patients, respectively. The vacA gene was present in all GC patients (by at least one of its alleles) while it was only found in 33.3% of gastritis patients. The vacA s1m1 combination was the most predominant genotype in GC patients, while m2 was the commonest allele in gastritis patients (10%). The iceA gene was found in 86.7% vs 40% of GC and gastritis patients, respectively. Simultaneous presence of multiple H. pylori strains was proved, both phenotypically and genotypically. Conclusion:The development of GC is linked to infection with H. pylori harboring certain virulence genes. Higher infection density of H. pylori was found in GC patients. Co-existence of more than one strain of H. pylori in the same patient occurs in both malignant and benign lesions.

关键词：基因型鉴定幽门螺杆菌消化道疾病患者幽门螺旋杆菌 rRNA基因埃及抗生素敏感性

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Application of Structural Equation Modelling in Construction Management Research

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Journal of Civil Engineering and Architecture 2010年第2期4卷 47-70页

作者： Sia Mal Kong Christy Pathrose Gomez Zuhairi abd. Hamid Building Division School of Technology Kolej Tunku Abdul Rahman Kuala Lumpur 53300 Malaysia Research Management ＆ Innovation Centre Universiti Tun Hussein Onn Malaysia Parit Raja 86400 Johor Malaysia Construction Research Institute of Malaysia （CREAM） CIDB Malaysia Kuala Lumpur55200 Malaysia

This paper, based on Deming’s quality management (QM) theory embodied in ISO 9001, uses structural equation modelling (SEM) in a construction management research. Based on 100 usable responses collected from a nationwide survey carried out from 14th February to 30th May 2008 on all key players in the Malaysian construction value chain, this paper aims to: (a) validate the dimensions of registration efforts to obtain and maintain ISO 9001 certifications; (b) validate the eight QM principles in ISO 9001 for quality management system (QMS) practices; (c) determine the components of organisational improvements experienced as a result of ISO 9001 certifications in terms of company competitiveness, customer satisfaction, and business performance; and (d) investigate the causal relationships among registration efforts, QMS practices, company competitiveness, customer satisfaction, business performance of ISO 9001–certified companies. The knowledge gained from the application of SEM is an important contribution to the body of theoretical literature in QM.

关键词：结构方程模型模型管理应用质量管理体系客户满意度施工登记工作业务性能

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