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سید یوسف

یا اسفٰی علی یوسف
افسوس ہے کہ جناب سید یوسف صاحب سکریٹری جماعت اسلامی ہند کا مختصر علالت کے بعد انتقال ہوگیا۔ اناﷲوانا الیہ راجعون۔
وہ جماعت اسلامی ہند کے پُرجوش اور فعال رکن تھے، جماعت کے سکریٹری ہونے کے ساتھ انگریزی ہفتہ وار اخبار ’’ریڈینس‘‘ بھی ان کی ادارت میں نکلتا تھا۔ جماعت اسلامی نے جب ’’فورم برائے جمہوریت و فرقہ وارانہ ہم آہنگی‘‘ کے نام سے ایک مشترکہ سیکولر پلیٹ فارم قائم کیا تو اس کی کامیابی کے لیے انہوں نے بڑی سرگرمی دکھائی اور مسلسل سفر بھی کیے۔نہایت سادہ، متواضع اور خلیق آدمی تھے، ہر طبقہ و مسلک کے لوگوں سے خندہ پیشانی کے ساتھ ملتے جلتے تھے، ابھی صرف انسٹھ برس کی عمر ہوئی تھی اور جماعت اسلامی ہند کو بجا طور پر ان سے بڑی توقعات وابستہ تھیں مگر ۳۰؍ ستمبر کو رب حقیقی سے جاملے۔ اﷲ تعالیٰ ان کی مغفرت فرمائے اور تمام متعلقین کو صبر جمیل عطا کرے، آمین۔ (’’ع ۔ع‘‘، اکتوبر ۱۹۹۷ء)

 

صحیح بخاری کی کتاب التفسیر کے فنی مباحث کا اختصاصی مطالعہ

The book of tafseer of Sahi Bukhari is most comprehensive book among the books of Hadith and on the basis of many features, it is considered superior to many other books of Hadith. Imam Bukhari annotates each surah one by one in his book of tafseer and constructs 114 chapters equal to the number of surah and these chapters carry 548 hadith of Zikr in which 465 are Mosool and remaining are mualaq and 100 hadith are not described before and remaining are repetitive. Imam Bukhari implements both style of description that is tafseer bil masaur and tafseer bil rai which proves the fact that Imam Bukhari supports the style of tafseer bil rai mehmood. Many Quranic information can be collected from book of tafseer for example: sabub nazool, makki & madni, ilmul qirat, ghareebul quran etc. The derivation of these features the book of tafseer of Sahi Bukhari is not the end but it is a starting point for new study.

Ale Moving Mesh Generation and High Performance Implementation Using Openmp and Mpi Libraries for Fsi and Darcy Flow Problems

A high performance algorithm for the implementation of Arbitrary Lagrangian and Eulerian (ALE) moving mesh scheme for both 2D and 3D Fluid Structure Interaction (FSI) problems for the shared and distributed memory systems is discussed in the the- sis. OpenMP library is used to implement parallel programs on shared memory systems whereas message passing interface (MPI) is employed to write parallel programs on dis- tributed memory systems. Moving mesh techniques are the integral part of a wider class of fluid mechanics problems that involve moving and deforming spatial domains, namely, free-surface flows and FSI. The moving mesh technique adopted in this work is based on the notion of nodes relocation, subjected to certain evolution as well as constraint conditions. A conjugate gradient method augmented with a preconditioning is employed for the solution of the resulting system of equations. The proposed algorithm, firstly, re- orders and partitions the mesh using an efficient divide and conquer approach and then parallelizes the ALE moving mesh. Different mesh partitioning algorithms are discussed, which include the octree method, and k-way graph partitioning technique using Parmetis library. Numerical simulations are conducted on AMD Opteron and Intel Xeon processors, and unstructured triangular and tetrahedral meshes are used for the 2D and 3D prob- lems. The better results, in terms of the speedup, are obtained for the shared memory system than the distributed memory system for both the 2D and 3D problems. The quality of meshes is checked by comparing the element Jacobians in the reference and current meshes, and by keeping track of the change in the interior angles in triangles and tetrahedrons. The proposed parallel mesh reordering algorithm using sampling approach for work load re-distribution concluded 51% of average efficiency in term of the speedup for shared memory systems. The overall maximum speedup of 6.37, for the shared mem- ory system, is achieved using eight processing elements (PEs) as compared to 4.11 for the distributed memory system including twelve PEs. As a case study, the thesis also discusses the high performance implementation of a stabilized mixed finite element method for Darcy flow using MPI library. It has a lot of practical applications in the field of petroleum engineering and earth sciences especially, where the flow of fluid is of interest in a permeable porous medium. The maximum speedup of 12.24 is achieved using 28 PEs by incorporating the proposed mesh partition- ing algorithm. Outline Chapter 1 defines and introduces the problem statement and Chapter 2 gives the gen- eral introduction of the thesis. Chapter 3 presents the literature review of ALE moving mesh generation, stabilized mixed finite element methods, k-way graph partitioning algo- rithm and tree based spatial data structures. Chapter 4 mathematically formulates the ALE mesh generation problem and presents the serial algorithm for optimization using the preconditioned conjugate gradient method. Chapter 5 presents a mesh reordering algorithm based on quadtree/octree and quick sort techniques. Chapter 6 discusses the parallelization part of mesh reordering algorithm based on a sampling approach and also discusses the experimental results for the shared memory systems. Detailed discussion about the mesh partitioning and experimental results using MPI are given in Chapter 7. Chapter 8 briefly describes the stabilized finite element method for Darcy Flow and dis- cusses the results of 2D problems for a distributed memory system. Finally, conclusions are drawn in Chapter 9 and future work is presented in Chapter 10.
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