A study on the surface defects of a compact disk

Boundary Layers and Heat Transfer on a Rotating Rough Disk

The study of flow and heat transfer over rotating circular disks is of great practical importance in understanding the cooling of rotatory machinery such as turbines, electric motors and design and manufacturing of computer disk drives. This paper presents an analysis of the flow and heat transfer over a heated infinite permeable rough disk. Boundary-layer approximation reduces the elliptic Nav...

Linear Quadratic Controller with Fault Detection in Compact Disk Players

The design of the positioning controllers in Optical Disk Drives are today subjected to a trade off between an acceptable suppression of external disturbances and an acceptable immunity against surfaces defects. In this paper an algorithm is suggested to detect defects of the disk surface combined with an observer and a Linear Quadratic Regulator. As a result, the mentioned trade off is minimiz...

Compact Endomorphisms of Certain Subalgebras of the Disk Algebra

General relativistic hydrodynamic flows around a static compact object in final stages of accretion flow

Dynamics of stationary axisymmetric configuration of the viscous accreting fluids surrounding a non-rotating compact object in final stages of accretion flow is presented here. For the special case of thin disk approximation, the relativistic fluid equations ignoring self-gravity of the disk are derived in Schwarzschild geometry. For two different state equations, two sets of self-consistent an...

The effect of mechanical surface conditioning methods on the shear bond strength of repaired composites

The effect of mechanical surface conditioning methods on the shear bond strength of repaired composites Dr. P. Alizadeh Oskuee* - Dr. N. Mohammadi* - Dr. S. Savadi Oskuee* - Dr. A. Hoseini** *- Assistant Professor of Operative Dentistry Dept. - Faculty of Dentistry – Tabriz University of Medical Sciences. **- Dentist. Background and Aim: Considering the cost and quantity of tooth loss in the pr...