ڈاکٹر یوسف حسین مرحوم
معارف کا زیادہ تر حصہ لکھا جاچکا تھا کہ ڈاکٹر یوسف حسین خاں کے انتقال پر ملال کی خبر ملی، وہ ہماری مجلسِ انتظامیہ کے بہت پرانے رکن تھے، ان کی وفات سے یہ ملک ایک شریف ترین انسان ، ایک خلیق بزرگ، ا یک اچھے دوست اور ایک بہت ہی نامورمصنف سے محروم ہوگیا، اﷲ تبارک و تعالیٰ ان کو کروٹ کروٹ جنت نعیم عطا کریں۔ (صباح الدین عبدالرحمن، مارچ ۱۹۷۹ء)
ڈاکٹر یوسف حسین مرحوم
گذشتہ ۲۱؍ فروری کی رات کو ریڈیو میں خبر سنی کہ ڈاکٹر یوسف حسین اﷲ کو پیارے ہوئے یہ خبر سن کر ایسا معلوم ہوا کہ کوئی شفیق بزرگ دائمی مفارقت دے گیا، رات بڑ ے کرب سے گذری۔
ان سے میرا پہلا تعارف ۱۹۳۴ء میں ہوا میں کچھ دنوں جامعہ ملیہ میں بھی رہا، قرول باغ کے جس مکان میں ڈاکٹر ذاکر حسین مرحوم جامعہ ملیہ کے شیخ الجامعہ کی حیثیت سے سکونت پذیر تھے، اسی کے پاس میں ایک مکان میں مقیم تھا، ان دنوں ڈاکٹر یوسف حسین جامعہ عثمانیہ میں تاریخ کے استاد تھے، عید منانے اپنے محبوب بھائی ڈاکٹر ذاکر حسین صاحب کے پاس آگئے تھے، ان کو پہلی دفعہ دیکھا تو سفید شیروانی میں ملبوس تھے، بہت ہی شکیل اور رعنا جو ان نظر آئے، اسی زمانہ میں ان کے بھتیجے امتیاز حسین مرحوم یعنی ان کے سب سے بڑے بھائی کے لڑکے جامعہ ملیہ سے بی۔اے کی تعلیم سے فارغ ہوئے تھے اور مزید تعلیم کے لیے یورپ جانے کی فکر میں تھے، وہ خالی اوقات میں میرے پاس آجاتے، ان سے معلوم ہوا کہ ڈاکٹر ذاکر حسین صاحب کے گھر کی عورتیں ڈاکٹر یوسف حسین صاحب کو خوش قسمت اور مالدار سمجھتی ہیں، کیونکہ ان کے یہاں اچھے سوفہ سٹ اور دوسرے فرنیچرس جو اس زمانہ میں...
The graph of development of Islamic Banking system is increasing day by day. It deals only those transaction which are not conflict with Shari'ah. Therefor the procedure of transaction of Islamic Banking is completely different from the conventional Banking system. Murābaha (Cost plus sale) or Murābaha li al-Āamir be al-Shēraá. (Cost plus sale for the purchase orderer) is a well-known financing mood. In this mood of financing, the Islamic bank bound to buy the required goods to the orderer and to sells him at higher price than the purchase price. Islamic Banks occasionally appoints an agent to buy the goods. Sometime the Islamic Banks appoints the purchase ordere himself as an agent. In this case, the contract of Murabaha and the contract of agency should not be related to each other. When the purchase orderer buys the goods as an agent, he will inform the Bank of his purchase, and the possession of the agent will be considered as the possession of the Bank. In this way, both contracts Murābaha and Wakālah are not related to each other. After this, the Bank will offer to sell him (purchase orderer) the goods and then he will accept the offer.
In this work we concentrated on the modeling of the nanofluid thin film flow past a stretching surface with different physical parameters. These parameters of interest are discussed in brief in each chapter with its physical significance with solution techniques. Chapter one is an overview of the basic definitions and models. Classification of the fluid is presented with diagrams and some different physical phenomena are sketched with figures. The basic model equations for the description of the physical system are derived with its physical significance. A comprehensive note is presented on the nanofluid model for the thermal conductivity in the enhancement of heat. Hall effect is discussed with its mathematical relation to the momentum equation. Some basic models for non-Newtonian fluids are also presented. In conclusion to this chapter, the basic scheme of the solution technique is discussed. In chapter two we focus on the literature present for the next four chapters. Nanofluids are discussed in detail and work are done on the nanofluids is described over stretching surfaces. MHD flow with Hall effect is encircled with its mechanism and literature survey. Finally the concept of boundary-layer is presented for nanofluid from its literature point of view on stretching surfaces. In chapter three, thin film flow is modeled with the help of the Reiner-Philippoff fluid model. The physical problem is sketched in the form of the mathematical model which is further transformed into an ODEs system with its boundary restrictions. The effects of Brownian motion and thermophoresis are studied over the Reiner-Philippoff fluid. The transformed model is solved by using HAM. The convergence of the implemented technique is presented in the form of tables. The impact of Nusselt number, Sherwood number and skin friction is presented over these profiles. Tables show the impact and efficiency of our implemented technique. In chapter four, different base fluids are used for viscous Titania nanofluid flow. A 3D flow of an electrically conducting fluid is considered over an inclined rotating surface. A magnetic filed id applied to the surface of the sheet. A similar approach we have used in chapter 3 is implemented. The reduced model is solved with the help of the numerical technique. The implemented technique is compared with the HAM results in the form of tables. The convergence of the technique is also presented by the graphs. The impact of different physical parameters are discussed over various state variables. In chapter five, the second grade viscoelastic MHD nanofluid flow past a vertical stretching sheet is assumed. The physical problem contains the entropy generation, mass transfer and heat transfer in the fluid flow. The gradient in concentration, thermophoresis and Brownian effects are considered in the flow. A physical problem is modeled and transformed with help of new dimensionless variables together with the boundary restrictions and is further solved with the help of HAM. The implemented technique convergence is shown by tables. The effect of various physical parameters is observed and analyzed over different profiles. In chapter six, a magnetic field is applied to a three dimensional geometry with a rotating disk over which a steady and viscous nanofluid flow is considered. The analysis of the fluid flow is carried out with consideration of the Casson fluid model. The fluid assumed to be electrically conducting. To reduce the complexity of the model, the system is transformed into less complex model by using the newly introduced dimensionless variables with its boundary restrictions. A numerical technique in comparison with HAM is used for the problem solution. Some physical important parameters are described in detail and its impact is analyzed over different state variable profiles. A comparative tabular survey for the numerical technique with HAM is presented. This tabular survey shows the reliability of our technique. Finally, in the last two chapters, the results obtained, and the papers published from this work is presented.