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材料科学与工程（中英文A版） 2011年第6期1卷 790-800页

作者： Mohamed ei-Shahate Saraya Department of Chemistry Faculty of Science Al-Azhar University Cairo Egypt

Simulation of Liquid Argon Flow along a Nanochannel： Effect of Applied Force

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Chinese Journal of Chemical Engineering 2009年第5期17卷 734-738页

作者： YIN Chun-Yang ei-Harbawi Mohanad Faculty of Chemical Engineering Universiti Teknologi MARA Shah Alam 40450 Selangor Malaysia Chemical Engineering Department Universiti Teknologi PETRONAS Bandar Seri Iskandar 31750 Tronoh Perak Malaysia

Liquid argon flow along a nanochannel is studied using molecular dynamics (MD) simulation in this ***-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) is used as the MD *** effects of reduced forces at 0.5,1.0 and 2.0 on argon flow on system energy in the form of system potential energy,pressure and velocity profile are *** in the form of three-dimensional visualization of the system at steady-state condition using Visual Molecular Dynamics (VMD) is provided to describe the dynamics of the argon *** equilibrium state is reached after 16000 time *** effects on system energy,pressure and velocity profile due to reduced force of 2.0 (F2) are clearly distinguishable from the other two lower forces where sufficiently high net force along the direction of the nanochannel for F2 renders the attractive and repulsive forces between the argon atoms virtually non-existent.A reduced force of 0.5 (F0.5) provides liquid argon flow that approaches Poiseuille (laminar) flow as clearly shown by the n-shaped average velocity *** extension of the present MD model to a more practical application affords scientists and engineers a good option for simulation of other nanofluidic dynamics processes.

关键词： molecular dynamics large-scale atomic/molecular massively parallel simulator visual molecular dynamics nanofluidics argon

Demography of the threatened endemic shrub, Arbutus pavarii,in the Al-Akhdar mountainous landscape of Libya

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Journal of Forestry Research 2016年第6期27卷 1295-1303页

作者： Hanan F.Kabiel Ahmad K.Hegazy Lesley Lovett-Doust Saud L.Al-Rowaily Abd ei-Nasser El Borki Department of Botany and Microbiology Faculty of ScienceCairo University Giza 12613 Egypt Department of Biology and Chemistry Nipissing UniversityNorth Bay ON Canada Department of Plant Production College of Food and Agricultural Sciences King Saud University Riyadh SaudiArabia Department of Botany Faculty of Science University of Benghazi Benghazi Libya

We sampled twenty populations of the vulnera- ble endemic shrub or tree, Arbutus pavarii Pampan., at different elevations and aspects within the A1-Akhdar mountainous region of Libya. Our sampling sites were at elevations ranging from 285 to 738 m above sea level, and several different habitats： vallies （locally known as wadis）, north- and south-facing slopes, and mountaintops. All individuals within each quadrat were studied. Population size and structure, and plant functional traits were assessed. None of the populations had a stable distribution of size classes. Some consisted mostly of small plants, with little or no fruit production; others consisted only of mid-sized and large plants, with high fruit production, but no juvenile recruitment. There was a significant increase in percent cover with increasing elevation; reproductive output （the number of fruits per branch and total number of fruits per individual） also generally increased with elevation. In some of these populations the lack of recruitment, and in others the failure to produce fruit, together constituted serious demographic threats. In light of these results, recommen- dations are made for conservation of this vulnerable endemic species.

关键词： Al-Akhdar mountains Conservation Demography Elevation Functional traits Vulnerable species

ANALYSIS OF WATER QUALITY IN SHALLOW LAKES WITH A TWO-DIMENSIONAL FLOW-SEDIMENT MODEL

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Journal of Hydrodynamics 2007年第4期19卷 501-508页

作者： JI Yong ZhANG Jie YAO ei ZHAO Di-hua Nanchang Institute of Technology Nanchang 330099 China College of Environmental Science and Engineering Hohai University Nanjing 210098 China Nanjing Hydraulic Research Institute Nanjing 210098 China

The governing equation for sediment pollutions was derived based on the turbulent diffusion of pollutants in shallow lakes. Coupled with shallow water equations, a depth-averaged 2-D flow and water quality model was developed. By means of the conservation law, a proposed differential equation for the change of sediment pollutants was linked to the 2-D equations. Under the framework of the finite volume method, the Osher approximate Riemann solver was employed to solve the equations. An analytical resolution was used to examine the model capabilities. Simulated results matched the exact solutions especially well. As an example, the simulation of CODMn in the Wuli Lake, a part of the Taihu lake, was conducted, which led to reasonable results. This study provides a new approach and a practical tool for the simulation of flow and water quality in shallow lakes.

关键词： sediment falling velocity turbulence flow and water quality model finite volume method approximate Riemann solver shallow water equation advection-dispersion equation

Cost of Dams in AI-Baha Province, Kingdom of Saudi Arabia

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Journal of Environmental Science and Engineering(B) 2013年第2期2卷 77-81页

作者： Alaa Nabil ei-Hazek Department of Civil Engineering Faculty of Engineering Al-Baha University AI-Baha 65522 Kingdom of Saudi Arabia Department of Civil Engineering Faculty of Engineering Banha University Shobra 11689 Egypt

The purposes and the types of dams are reviewed in AI-Baha province, on the western south of KSA （Kingdom of Saudi Arabia）. Data are collected and tabulated ascending according to the capacity of storing water. The cost （in Saudi Riyal） is plotted versus the capacity （in m3） for the dams. Then a linear regression analysis is done employing Micro Software Excel. An equation is obtained to predict the cost of dams with storage capacities less than or equal 500,000 m3, where the type of dam has no effect on the cost. Taking into consideration the inflation rates along the time, the 2013＇s costs are estimated and also another equation is obtained to predict the cost.

关键词： Dam storing water cost AI-Baha.

Influence of Microstructure and Second Phase Precipitation by Adding Al-Ti on the Mechanical Behavior of Austenitic Heat Resistant Steel Castings

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材料科学与工程（中英文B版） 2016年第5期6卷 241-248页

作者： W. ei-Ghazaly A. Y. Shash S. ei-Ghazaly Researcher at Central Metallurgical Research and Development Institute P. O. Box 87 11421 Helwan Egypt University Teacher Faculty of Engineering Cairo University 12316 Giza Egypt Emeritus Professor at Central Metallurgical Research and Development Institute P. O. Box 87 11421 Helwan Egypt

Synthesis and Characterization of Dimeric Copper（ll） and Nickel（ll） Complexes with Some Aroylhydrazones of a-Pyridoin and Solvent Extraction Applications

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Journal of Chemistry and Chemical Engineering 2012年第2期6卷 158-172页

作者： Ahmed H. Abdel-Salam Hemmat A. ei-Badawy Tahani ei-Zayat Department of Chemistry Faculty of Science Alexandria University Alexandria 21321 Egypt Department of Chemistry Faculty of Science Tabuk University Tabuk 71491 Kingdom of Saudi Arabia

A new series of dimeric Cu（II） and Ni（II） complexes with some aroylhydrazones of a-pyridoin were synthesized and characterized using different physical techniques. Their chemical formulae were based on their microanalysis and IR data. The structures of the solid complexes were determined from the electronic, IR and ESR spectral studies as well as their magnetic susceptibility measurements. The ligands acted as bi-, tri- and tetra-dentate forming different dinuclear complexes with different structures. The assumed molecular structures based on the experimental results were also confirmed by the molecular mechanics calculations. The extraction ability of the hydrazones has been investigated by liquid-liquid extraction for Cu（II） and Ni（II）.

关键词： Hydrazones complexes spectra thermal analysis solvent extraction.

Purang Ultramafic Complex and Their Geological Origin, Southwest Tibet

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Acta Geologica Sinica(English Edition) 2015年第A02期89卷 22-24页

作者： Hamed Gamal El Dien Mohamed Hamdy Abdel Salam Abu ei-Ela Adel Hassan Youngwoo Kil Geology Department FaculW of Science Tanta University 31527 Tanta Egypt Department of earth sciences school of natural science kanazawa university Japan Department of Energy and Resources Engineering College of Engineering Chonnam National University Yongbong-roBuk-gu Gwangju Korea

Neoproterozoic ophiolitic Serpentinites are common in the Arabian-Nubian Shield （ANS） of the Eastern Desert （ED） of Egypt, which were formed in arc stage in different tectonic setting. Thus they might subject to exchange with the crustal material derived from recycling subducting oceanic lithosphere. This caused metasomatism enriching the rocks in incompatible elements and forming non- residual minerals. Herein,

关键词： OPHIOLITES RESEARCH SERPENTINITE METASOMATISM (Mineralogy) RARE earths EARTH'S mantle

Physico-Chemical and Biological Studies on Some Complexes of 5-Amino-3-Methylthio-lH-Pyrazol- 4-Carbonitrile

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材料科学与工程（中英文A版） 2012年第9期2卷 610-615页

作者： Mohamed Abd ei-Samea Elnawawy Chemistry Department Faculty of Science Al-Azhar University Nasr City P.O. Box 11884- Cairo Egypt

Embedding hollow Co3O4 nanoboxes into a three- dimensional macroporous graphene framework for high-performance energy storage devices

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Nano Research 2018年第5期11卷 2836-2846页

作者： Mengping Li Maher F. ei-Kady Jee Y. Hwang Matthew D. Kowal Kristofer Marsh Haosen Wang Zhijuan Zhao Richard B. Kaner Department of Chemistry and Biochemistry and California NanoSystems Institute University of California Los Angeles Los Angeles CA 90095 USA Department of Chemistry Faculty of Science Cairo University Giza 12613 Egypt Department of Materials Science and Engineering University of California Los Angeles Los Angeles CA 90095 USA

Carbon materials are widely used for supercapacitor applications thanks to their high surface area, good rate capability, and excellent cycling stability. However, the development of high energy density carbon supercapacitors still remains a challenge. In this work, hollow Co3O4 nanoboxes have been embedded into three-dimensional macroporous laser-scribed graphene （LSG） to produce composite electrodes with improved electrochemical performance. Here, Co3O4 provides high capacity through fast and reversible redox reactions, while LSG serves as a conductive network to maintain high power. The open nanobox morphology is a unique solution for extracting the maximum capacity from Co3O4, resulting in electrodes whose surfaces, both internal and external, are accessible to the electrolyte. The electrochemical performance of the composite material is promising with a volumetric capacity of 60.0 C/cm^3 and a specific capacity of 542.3 C/g, corresponding to 682.0 C/g of the constituent Co3O4. With a low equivalent series resistance of 0.9 Ω, the Co3O4/LSG electrode is able to maintain 113.1% of its original capacity after 10,000 cycles. This work provides new insights into the design of high-performance carbon/metal oxide nano- composites for next-generation energy storage devices.

关键词： supercapacitor graphene cobalt oxide laser composite hybrid capacitor