For the solution of the SID (Symmetric InDefinite) linear systems, the use of the GLS (Generalized Least-Squares) polynomial preconditioner can improve the execution efficiency of solvers, particularly for some specially structured systems. In this paper the suitability of GLS preconditioning for a class of specially structured linear system of equations is demonstrated. The algorithms are impl...

The use of complex self tuning Proportional, Integral and Derivative (PID) controller, to drive the speed and direction in mini robot, is limited by calculus power and by the precision and noise of the on board input sensors, particularly severe problems arise in computing the derivative term. In this work a PID whose terms are computed from filtered input with a simple recursive Exponentially ...

IN nasal surgery, cartilage or bone transplants are required for support or correction of cosmetic deformities. When autogenous material is readily available, it should be used in preference to homogenous or heterogenous material. Sometimes this means, however, an iliac bone or rib cartilage graft. These procedures have a certain morbidity and the grafts are not always readily accepted by the p...

We study the eigenvalue problem for a specially structured rank-k updated matrix, based on the Sherman–Morrison– Woodbury formula. 2006 Elsevier Inc. All rights reserved.

Elusive metastable orthorhombic paracetamol single crystals were obtained by specially designed seeding technique from conventional slow evaporation method. Seeds were prepared at optimized conditions under different cooling rates from seed preparation unit and Powder x-ray diffraction (PXRD) was performed to ensure the polymorphic form of seeds. Saturated paracetamol solutions with three diffe...