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General Solution for Unsteady Natural Convection Flow with Heat and Mass in the Presence of Wall Slip and Ramped Wall Temperature

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Communications in Theoretical Physics 2019年第6期71卷 647-657页

作者： Saeed ullah Jan sami ul haq Syed Inayat Ali Shah Ilyas Khan Muhammad Atif Khan Faculty of Mathematics and Statistics Ton Duc Thang UniversityHo Chi Minh CityVietnam Department of Mathematics Islamia College UniversityPeshawar25000Pakistan Department of Mathematics Kohat University of Science&TechnologyKohat26000Pakistan

This work is focused on the effect of heat and mass transfer with unsteady natural convection flow of viscous fluid along with ramped wall temperature under the assumption of the slip wall condition at the boundary. Analytical solutions are obtained by using Laplace transformation to the non-dimensional set of governing equations containing velocity, temperature and concentration. Moreover, the expression for skin-friction is derived by differentiating the analytical solutions of fluid velocity. Numerical tables for Skin-friction, Sherwood number and Nusselt-number are examined. For the physical aspects of the flow, we use various values of involved physical parameters such as Prandtl number(Pr), slip parameter(η), Schmidt number(Sc), buoyancy ratio parameter(N), Sherwood number(Sh), and time(t). Additionally, the general solutions are plotted graphically and a comprehensive theoretical section of numerical discussions is included.

关键词： slip boundary condition heat and mass transfer skin-friction

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Issues in Global Software Development: A Critical Review

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Journal of Software Engineering and Applications 2011年第10期4卷 590-595页

作者： sami ul haq Mushtaq Raza Asraf Zia M. Naeem Ahmed Khan 不详

A number of companies have employed Global Software Development (GSD) methodology as a useful tool for their software development practices. GSD is a contractual relationship between client and vendor organizations in which a client outsources all or some part of its software development activities to a vendor. The vendor in return provides the agreed services in lieu of certain amount of remuneration. The main reasons to select the GSD technique include reduced cost, faster development and access to skilled manpower. Though GSD is emerging as an effective technique, but it suffers from many challenges like poor communication, lack of trust and coordination. These challenges pose serious risk to the smooth execution of the GSD projects. In this paper, we present a comparative study on GSD to highlight its merits and demerits. Our findings reveal that much of the research in this area has been focused on addressing issues faced by client organizations, however, vendor side in the GSD relationship is much ignored due to which this area is still immature;and, hence, further research work is required to be undertaken to address the issues faced by the vendor organizations.

关键词： Communication Co-Ordination and Trust Global Software Development (GSD) Distributed Software Development (DSD)

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鸟嘌呤核苷酸交换因子在胃癌组织中的表达及其临床意义

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临床外科杂志 2021年第9期29卷 848-852页

作者：胡欣雨姚晖夏冬 sami ul.haq Niazi 西南医科大学附属医院胃肠外科四川泸州646000

目的探讨Crk SH3域结合鸟嘌呤核苷酸交换因子(C3G)在胃癌组织中的表达及其临床意义。方法利用Oncomine等生物信息大数据库,分析C3G在肿瘤组织及癌旁组织中是否存在表达差异。2012年12月~2015年12月手术切除的胃癌病人121例,使用免疫组... 详细信息

目的探讨Crk SH3域结合鸟嘌呤核苷酸交换因子(C3G)在胃癌组织中的表达及其临床意义。方法利用Oncomine等生物信息大数据库,分析C3G在肿瘤组织及癌旁组织中是否存在表达差异。2012年12月~2015年12月手术切除的胃癌病人121例,使用免疫组化法检测癌组织及癌旁组织中C3G蛋白的表达,分析C3G蛋白的表达与临床病理特征及预后的关系。结果C3G在胃癌组织中表达高于正常组织(P0.05)。结论C3G在胃癌组织中呈高表达,其高表达与胃癌发展及不良预后有关。

关键词：胃癌 C3G 表达预后

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Physical aspects of magnetized Jeffrey nanomaterial flow with irreversibility analysis

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Chinese Physics B 2022年第8期31卷 485-493页

作者： Fazal haq Muhammad Ijaz Khan sami ullah Khan Khadijah M Abualnaja M A El-Shorbagy Department of Mathematics Karakoram International University Main CampusGilgit 15100Pakistan Department of Mathematics and Statistics Riphah International University I-14Islamabad 44000Pakistan Department of Mechanics and Engineering Science Peking UniversityBeijing 100871China Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Department of Mathematics and Statistics College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Mathematics College of Science and Humanities in Al-KharjPrince Sattam bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Department of Basic Engineering Science Faculty of EngineeringMenoufia UniversityShebin El-Kom 32511Egypt

This research presents the applications of entropy generation phenomenon in incompressible flow of Jeffrey nanofluid in the presence of distinct thermal features. The novel aspects of various features, such as Joule heating, porous medium,dissipation features, and radiative mechanism are addressed. In order to improve thermal transportation systems based on nanomaterials, convective boundary conditions are introduced. The thermal viscoelastic nanofluid model is expressed in terms of differential equations. The problem is presented via nonlinear differential equations for which analytical expressions are obtained by using the homotopy analysis method(HAM). The accuracy of solution is ensured. The effective outcomes of all physical parameters associated with the flow model are carefully examined and underlined through various curves. The observations summarized from current analysis reveal that the presence of a permeability parameter offers resistance to the flow. A monotonic decrement in local Nusselt number is noted with Hartmann number and Prandtl ***, entropy generation and Bejan number increases with radiation parameter and fluid parameter.

关键词： Jeffrey nonmaterial entropy generation magnetohydrodynamics(MHD) Bejan number porous medium Brownian motion

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