سید محمد احمد کاظمی
افسوس ہے پچھلے دنوں محمد احمد صاحب کاظمی کاانتقال ہوگیا۔مرحوم مولانا سید طفیل احمد صاحب منگلوری کے فرزند ارجمند اورایک نامور خاندان کے چشم و چراغ تھے۔الہٰ آباد ہائی کورٹ کے بڑے کامیاب ایڈوکیٹ اور ممبر پارلیمنٹ تھے۔ پارلیمنٹ میں وقف ایکٹ کے مصنف وہی تھے۔نیشنلزم گویاان کی گھٹی میں پڑا تھا۔کانگریس کے علاوہ جمعیۃ علمائے ہند اورمجلس احرار کے بھی سرگرم کارکن تھے۔ اخلاقی اعتبار سے بڑے درویش صفت اور خداترس انسان تھے۔گذشتہ سال جب کہ حج کرکے آئے تھے اس وقت سے ان کی دین داری میں عظیم انقلاب پیداہوگیا تھا۔آنحضرتﷺ کے ساتھ عشق کا یہ عالم تھا کہ نام نامی زبان پرآیا اورچشم پُر نم ہوگئی۔اسی جذبہ سے انگریزی زبان میں ایک ضخیم سیرت نبوی مرتب کررہے تھے جو افسوس ہے کہ نامکمل رہ گئی۔اﷲ تعالیٰ مغفرت وبخشش کی نعمتوں اورراحتوں سے نوازے۔ [دسمبر۱۹۵۹ء]
This study examines the concept of globalisation in its characteristics ramifications. The research used empiricism or an empirical method of data collection and analysis. The research used feasibility and affordability in gathering of data for the work using empirical approach in which statistics and figures from credible sources are relied on. The data obtained were discussed using empirical methodological analysis where some themes are identified and discussed from the topic of the study using scientific tools such as tables, charts, bars and figures where necessary. The research discovered that globalisation is not a good phenomenon in African continent owing to slow economic growth, trade disequilibrium and parallel development comparatively because of disadvantages in terms of export, volume of trade exchange and low level of technological development. The research recommends that there is an urgent need for the African countries to restrategise and reshape their economic and political interest at the global level through the creation of a competitive means of relevance at the global centre-stage of world economy and politics.
Approximate Solutions of Differential Equations of Non-Newtonian Fluids Flow Arising in the Study of Helical Screw Rheometer The thesis presents the theoretical analyses of extrusion process inside Helical Screw Rheometer (HSR). Efforts to obtain better insight into the process must be mainly theoretical rather than experimental. But the hope, of course, is that better insight than experimental so gained will provide practical benefits such as better control of the processing, optimize the processing process and improve the quality of production. The main objective of the study is to develop mathematical models in order to evaluate the velocity profiles, shear stresses and volume flow rates for isothermal flow of incompressible non-Newtonian fluids in HSR. The calculations of these values are of great importance during the production process. In this thesis, two types of geometries are considered. • In first geometry the Cartesian co-ordinates system is used to study the flow of third-grade fluid, co-rotational Maxwell fluid, Eyring fluid, Eyring-Powell fluid and Oldroyd 8-constant fluid models in HSR. The geometry of the HSR is simplified by unwrapping or flattening the channel, lands and the outside rotating barrel. A shallow infinite channel is considered by assuming the width of the channel large as compared to the depth. We also assumed that the screw surface, the lower plate, is stationary and the barrel surface, the upper plate, is moving across the top of the channel with a velocity at an angle to the direction of the channel. The phenomena xis same as, the barrel held stationary and the screw rotates. Solutions for velocity profiles, volume flow rates, average velocity, shear and normal stresses, shear stresses at barrel surface and shear forces exerted on the fluid are obtained using analytical techniques. Adomian decomposition method is used to obtain the solutions for third-grade fluid, Eyring-Powell fluid and Oldroyd 8-constant fluid and perturbation method for co-rotational Maxwell fluid, where exact solution is obtained for Eyring fluid model. The effects of the rheological parameters, pressure gradients and flight angle on the velocity distributions are investigated and discussed. The behavior of the shear stresses is also discussed with the help of graphs for different values of non-Newtonian parameters. • For better analysis cylindrical co-ordinates system is taken in second geometry, assuming that the outer barrel of radius r 2 is stationary and the screw of radius r 1 rotates with angular velocity Ω. Here we have used third-grade fluid model with and without flight angle and co-rotational Maxwell fluid model with nonzero flight angle in HSR. The analytical expressions for the velocities, shear and normal stresses and the shear stresses exerted by the fluid on the screw, volume flow rates and average velocity are derived using analytical techniques and the outcomes have been presented with the help of graphs. The effects of the rheological parameters and pressure gradients on the velocity distribution are investigated.