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Unsteady MHD flow and heat transfer near stagnation point over a stretching/shrinking sheet in porous medium filled with a nanofluid

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Chinese Physics B 2014年第4期23卷 669-676页

作者： Sadegh khali.Saeed Dinarvand Reza Hossei Hossein Tamim Ioan Pop Young Researchers and Elite Club Saveh Branch Islamic Azad University Mechanical Engineering Department Amirkabir University of Technology Department of Mechanical Engineering Saveh Branch Islamic Azad University Department of Mathematics Babes-Bolyai University

In this article, the unsteady magnetohydrodynamic （MHD） stagnation point flow and heat transfer of a nanofluid over a stretching/shrinking sheet is investigated numerically. The similarity solution is used to reduce the governing system of partial differential equations to a set of nonlinear ordinary differential equations which are then solved numerically using the fourth-order Runge-Kutta method with shooting technique. The ambient fluid velocity, stretching/shrinking velocity of sheet, and the wall temperature are assumed to vary linearly with the distance from the stagnation point. To investigate the influence of various pertinent parameters, graphical results for the local Nusselt number, the skin friction coefficient, velocity profile, and temperature profile are presented for different values of the governing parameters for three types of nanoparticles, namely copper, alumina, and titania in the water-based fluid. It is found that the dual solution exists for the decelerating flow. Numerical results show that the extent of the dual solution domain increases with the increases of velocity ratio, magnetic parameter, and permeability parameter whereas it remains constant as the value of solid volume fraction of nanoparticles changes. Also, it is found that permeability parameter has a greater effect on the flow and heat transfer of a nanofluid than the magnetic parameter.

关键词： nanofluid Navier-Stokes equations MHD dual solutions porous media

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Phenolic and flavonoid contents, antioxidant and antimicrobial activities of leaf extracts from ten Algerian Ficus carica L. varieties

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Asian Pacific Journal of Tropical Biomedicine 2016年第3期6卷 239-245页

作者： Souhila Mahmoudi Mustapha khali.Abderahim Benkhaled Karima Benamirouche Imen Baiti Department of Food Sciences University "Saad Dahleb" of Blida Department of Microbiology and Biochemistry University of M'sila Scientific and Technical Research Center in Physicochemical Analyses

Objective: To determine the total phenolic and flavonoid contents, antioxidant and antimicrobial activities of methanolic leaf extracts of ten Algerian fig(Ficus carica L.)varieties(uniferous, biferous and caprifig tree).Methods: Phenolics were extracted by Soxhlet method and analyzed by the Folin–Ciocalteu colorimetric method. Flavonoids were determined by aluminum trichloride assay and the antioxidant capacity was determined by the 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay. The antimicrobial activity was studied with the disc diffusion method and a macrodilution broth method was used to determine the minimal inhibitory concentrations and minimal lethal ***: The mean extract yield was 14.10% ± 0.66%(n = 10). Leaf extract of biferous followed by uniferous varieties had the highest total phenolic contents [(52.296 ± 5.232)and(48.973 ± 2.015) mg gallic acid equivalent/g of dry plant extract respectively], flavonoids [(14.388 ± 0.333) and(14.136 ± 1.082) mg quercetin equivalent/g of dry plant extract] and antioxidant capacity [IC50(798.754 ± 108.590) and(825.004 ± 110.835) mg/m L]. Antioxidant capacity of fig leaves was significantly correlated with phenolic contents(r = 0.748). These extracts showed bactericidal activity and moderate antifungal activity, and the minimal inhibitory concentrations and minimal lethal concentrations were determined on Bacillus cereus and Staphylococcus ***: All tested extracts contain phenolic compounds and exhibited an antioxidant activity and an antimicrobial effect against Gram-positive and Gram-negative bacteria. Further researches on identification and purification of phenolic compounds are required.

关键词： Fig leaves Phenolics Flavonoids Antioxidant activity Antimicrobial activity

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GIS-Based Model to Assess Erosion Sensitivity in Northern Morocco. Laou Watershed Case Study

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International Journal of Geosciences 2012年第3期3卷 610-626页

作者： Ahmed Raissouni Lamiae khali.Issa Abdelkrim El Arrim M. Maatouk Roberto Passalacqua Dept. of Civil Environmental & Building Engineering (DICAT) – University of Genoa Via Montallegro 1 Genoa – ITALY Laboratory of Environment Oceanology and Natural Resources (LEORN) – Dept. of Earth Sciences Faculty of Sciences and Techniques. BP 146 - Tangier - MOROCCO

This application on the Laou watershed represents the first part of study results that concerns the development of a model for mapping soil susceptibility at a regional scale in northern Morocco using spatial databases and geographic information systems (GIS). The model uses qualitative decision rules and hierarchical organization of data represented by different thematic maps. Those laters are derived from input erosion parameters which are coded according to their sensitivity to water erosion. Superposing effect of several layers: geology, geomorphology, land use and topography, allows we the obtaining of a qualitative map showing the potential sensitivity to erosion per unit area. The obtained map shows that severe erosion affects the Southern and North-western sectors of the basin, even if they present the least erodible lands of all the basin and have, as well, a relatively dense plant cover. It may be concluded that both high gradient and damaged terrain state represent the main factors of water erosion in the Laou watershed.

关键词： Soil Erosion Laou Watershed Environment GIS

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公关传播测量与评估案例分享

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国际公关 2018年第2期 33-34页

作者： khali.Sakkas 慕亚集团

非常感谢大家来参加这个活动,我是第一次来中国,一直希望有机会跟大家交流经验。我是一名媒体分析员,而且是AMEC的成员,我们一直有良好的合作关系,双方不断沟通资源,从而更好地服务客户。所以,我希望把多年服务客户的经验分享给大家,也... 详细信息

非常感谢大家来参加这个活动,我是第一次来中国,一直希望有机会跟大家交流经验。我是一名媒体分析员,而且是AMEC的成员,我们一直有良好的合作关系,双方不断沟通资源,从而更好地服务客户。所以,我希望把多年服务客户的经验分享给大家,也非常感谢AMEC和公关协会提供了这个机会。我主要分享两个案例,让大家从中更好地了解,对传播活动的正确评估可以为企业带来哪些积极影响。

关键词：公关传播澳大利亚

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Hydrochemistry of Umm Er Radhuma Groundwater

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Journal of Geoscience and Environment Protection 2021年第4期9卷 128-146页

作者： muhammad Gomaah Desert Research Center Cairo Egypt United Nations Developing Program (UNDP) & Ministry of Env. Water and Agriculture Riyadh KSA

Umm Er Radhuma Aquifer (UER) is the most important groundwater aquifer in Saudi Arabia, extending over 1.6 M·km2 in the eastern part of the Arabian Peninsula, forming the main aquifer throughout the Rub’ Al-Khali (RAK). Groundwater salinity increased from west to east, reaching more than 27,000 mg/L near the border with the United Arab Emirates, where a Na+-Ca2+Clˉ- water type dominated. Gibbs diagrams indicated that the dissolution/precipitation of carbonates and evaporation/precipitation of minerals, especially anhydrite, gypsum, and halite account for the solutes and salinity in groundwater. Most of the samples plot above the 1:1 line of (Ca2+ + Mg2+

关键词： Hydrochemistry Umm Er Radhumma Aquifer Groundwater Water-Rock Interaction

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Effects of Vegetation Cover and Land Use Changes on Soil Erosion in Kalaya Watershed (North Western Morocco)

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International Journal of Geosciences 2015年第12期6卷 1353-1366页

作者： Khadija Ben Hamman Lech-hab Lamiae khali.Issa Ahmed Raissouni Abdelkrim El Arrim Abdelghani Afailal Tribak Rachid Moussadek Department of Earth Sciences Laboratory of Environment Oceanology and Natural Resources Faculty of Sciences and Technologies Abdelmalek Essaadi University Tangier Morrocco Unit of Environmental Research and Conservation of Natural Resources Laboratory of Mapping GIS and Remote Sensing Regional Centre of Agricultural Research INRA Rabat Morrocco

Vegetation cover degradation is still a very common problem in many parts of Morocco;moreover, it affects straight up the amount of the annual soil loss rate. The analytical approach used in this study, respectively, includes remote sensing techniques, application of USLE (Universal Soil Loss Equation) and overlay analysis in a raster Geographic Information System (GIS) environment, employing available information on the region covering the Kalaya catchment. Thus, this procedure allowed the calculation of the NDVI (Normalized Difference Vegetation Index), the execution of two types of classification (unsupervised and supervised) for 1999 and 2010 imagery and eventually the prediction of soil erosion risk in the watershed in question. The main outcome was the production of multidate vegetation cover maps, land use maps and soil loss risk maps. The overlay of two maps allowed us to highlight the changes occurred in this area, which evidence the high anthropogenic impact on the dynamics of land use and vegetation cover. The results suggest that the outputs of this study can be used for predicting rate of soil loss, which varied from 31.68 t·ha-1·yr-1 in 1999 to 34.74 t·ha-1·yr-1 in 2010.

关键词： Remote Sensing GIS Kalaya Catchment Land Use USLE

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专题研讨--公关传播测量与评估的发展趋势

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国际公关 2018年第2期 35-37页

作者： khali.Sakkas Richard Bagnall 黄健丰沈健单承俊慕亚集团 AMEC 慕亚中国迪思传媒集团

khali.Sakkas：我很喜欢这个环节,每个人都可以分享自己的观点,还可以与大家有更多的互动。今天,我们讨论的话题是公关传播测量与评估的发展趋势。如今,从媒体环境开始,公关行业的内外部均有明显的变化,因此就有了越来越多的整合机会。

关键词：公关行业公关传播数据搜集户外广告公关公司超能力公关广告人工智能

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女性小微创业者面临的挑战——巴基斯坦女性创业者个人工作和生活的协调措施

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苏州市职业大学学报 2018年第4期29卷 9-13,29页

作者： RIAZ Ahmad 米红 AMIN Ullah 任珂瑶 khali.DKhan 浙江大学公共管理学院浙江杭州310007 巴基斯坦联邦航空局巴基斯坦伊斯兰堡44000 苏州市职业大学教育与人文学院江苏苏州215104 齐鲁工业大学财务部山东济南250353

21世纪以来,越来越多的女性小微创业者活跃在商业界,但是女性创业者比男性创业者面临着更多的困难与障碍。该研究重点讨论女性小微企业家在创业时面临的障碍及平衡工作和生活的措施。通过对500名小微创业者发放调查问卷,对女性创业者平... 详细信息

21世纪以来,越来越多的女性小微创业者活跃在商业界,但是女性创业者比男性创业者面临着更多的困难与障碍。该研究重点讨论女性小微企业家在创业时面临的障碍及平衡工作和生活的措施。通过对500名小微创业者发放调查问卷,对女性创业者平衡工作和个人生活关系的影响因素进行分析,通过变量的相互关系研究,提出女性企业家在协调工作和个人生活关系时,需要注意以下因素影响:创业资金和资源的限制,陈规陋习的束缚,失业威胁和工作挑战,绩效评估体系,家庭支持的缺乏,社会不公平待遇,婚姻状况和父母关系的影响,个人身体情况和男性主宰的实际情况等。为了更好地帮助妇女创业,政府应该出台相应的扶持女性创业的政策,并提供资金支持和创业知识技能培训,让女性创业者提高其企业经营管理能力,让她们为自己、为自己的家庭,并最终为整个国家的社会经济作出贡献。

关键词：女性创业障碍个人生活工作和社会生活

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回顾2473个同源宫内人工授精治疗周期以评估其预后因子

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实用妇产科杂志 2001年第4期 259-259页

作者： Mohammed Rohi khali.赵龙梅

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虹膜色素剥脱综合征和剥脱性青光眼中血清维生素D水平分析（英文）

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国际眼科杂志 2018年第5期18卷 781-784页

作者： Wisam A Shihadeh Mustafa R A1-Hashumi Mohammed B khali.Alaa Al-Dabbagh Majd Al-Shalakhti Saied A Jaradat Yousef Khader 约旦科技大学医学院约旦伊尔比德22110 Yarmouk大学医学院约旦伊尔比德21163 Islami医院眼科约旦安曼11190

目的:虹膜色素剥脱综合征(XFS)和剥脱性青光眼(XFG)患者与对照组血清维生素D水平比较。方法:使用液相色谱法测量25羟基维生素D血清水平。记录性别、年龄、高血压、糖尿病和缺血性心脏病病史等可变因素。结果:研究包括55例XFS/XFG患者和... 详细信息

目的:虹膜色素剥脱综合征(XFS)和剥脱性青光眼(XFG)患者与对照组血清维生素D水平比较。方法:使用液相色谱法测量25羟基维生素D血清水平。记录性别、年龄、高血压、糖尿病和缺血性心脏病病史等可变因素。结果:研究包括55例XFS/XFG患者和正常对照组60例。XFS/XFG患者较为年长(平均年龄:71.8y vs 67.5y,P=0.002)。两组性别分布相似且糖尿病、高血压和缺血性心脏病的患病率无显著性差异。XFS/XFG患者平均维生素D水平为14.7 ng/mL,正常对照组为14.9 ng/mL,两组间无显著性差异。虽然XFS/XFG组维生素D水平较低,但在对年龄、性别和医疗条件进行校正后,多变量分析显示两组之间维生素D缺乏无显著差异。结论:XFS/XFG组和正常对照组维生素D水平均较低,而XFS/XFG组低于正常对照组,两组间无明显差异。XFS和维生素D缺乏症与某些系统性疾病有共同联系。

关键词：维生素D 虹膜色素剥脱综合征剥脱性青光眼

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