International Journal of Engineering & Mathematical Sciences
  (Print) 2319 - 4537
(Online) 2319 - 4545
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   International Journal of Engineering & Mathematical Sciences
IJEMS,Volume 6 (2014), Issue : 1 (July - Dec.) 2014    Collapse all | Expand all
1. Cost Benefit Analysis, MTTF and Availability of Two State Parallel Redundant System under Common Cause and Human Error
Author : Kavita Soni and U. R. Singh
Keyword : Cost Benefit Analysis, MTTF and Availability, Parallel Redundant System.

Volume: 6,Issue:1,PP:1 - 6,Year:(2014)
This paper is Cost analysis, MTTF and availability of two state parallel redundant systems under common cause and human error. We considered a system which consists of two sub system A and B connected in series. Sub system A consist of one unit, whereas sub system B consists of n identical units connected in parallel. All the units suffer three types of failures i.e. common cause failure, human failure and self life failure. The entire system can also fail due to common cause and human error from the good or degraded state directly. Repair can be done whenever the system is in degraded or failed state. Using supplementary variable technique, Laplace transform of the probabilities of the system being in varies states as well as in up and down states have been obtained which on inversion reliability, MTTF and expected profit during the operable stage of the system. Numerical solutions with various graphs have been given.
2. Time Varying MHD Flow of a Power Law Fluid through Porous Medium between Parallel Porous Plates under an Exponential Decaying Pressure Gradient
Author : P. K. Agarwal & Yogendra Kumar Dwivedi
Keyword : MHD, time varying flow, porous medium, Non-Newtonian.

Volume:6,Issue:1,PP: 07-15 ,Year:(2014)
The present paper on time varying MHD flow through porous medium of a viscous incompressible non-Newtonian power law fluid between two parallel horizontal porous plates is studied under an exponential decaying pressure gradient. A uniform suction and injection through the surface of the plates is applied. The two plates are kept at different but constant temperatures, while the viscous dissipation is taken into consideration. Numerical solutions for the governing nonlinear momentum and energy equations are obtained using finite difference approximations. The effect of the porosity and magnetic field parameter describing the non-Newtonian behavior and the velocity of suction and injection on both the velocity and temperature distributions as well as the dissipation terms is examined.
3. Mathematical Study of Effect of Magnetic Field on Blood Flow in Stenotic Artery
Author : Asendra Rohela & J. S. Chaudhary
Keyword : Blood flow, Magnetic field, Stenotic artery, Circular cylinder.

In this paper our aim is to find the effect of magnetic field on blood flow in stenotic artery. We have analyzed the artery as a circular cylinder consisting of stenosis. We have considered the realistic model of the basic function unit taking the steady viscous flow in artery with the help of equation of motion and one-dimensional diffusion equation. We have investigated the resistance to flow in artery for different values of magnetic field.
4. Mixed Convection MHD Flow of a Viscous Fluid through porous medium in a Vertical Channel with Heat Source
Author : Mohammad Faisal Khan, Mohammed Alawairdhi & Rajeev Jha
Keyword : MHD, Porous medium, free convection, finite difference techniques.

Aim of this paper is to investigate the effect of heat source and porosity on unsteady mixed convection flow of an incompressible, electrically conducting and viscous fluid through porous medium in a vertical channel under the influence of transversely applied uniform magnetic field. The channels walls are maintained at constant but different temperatures. The Boussinesq approximation is invoked, so that the density variation is retained in the buoyancy term only. Solution for the velocity distribution, the temperature field and the concentration field is solved by the use of finite difference technique. These are evaluated numerically for different values of the physical parameters and presented graphically.
5. Construction of common fixed point using sequence in contractive mapping
Author : Kamal Kumar, Nisha Sharma & Rajeev Jha
Keyword : Banach Contraction Principle, complete metric space, Cauchy sequence, Weak cont

The existence of a common fixed point for several mappings is studied in many papers ([3], [4], [6]). In this paper we will prove the existence of a common fixed point for generalized contraction using sequences. The concept of sequence of function is already used in 2008, Dutta et. al.[1].
6. Electrolytic Study of Phenol in Methanol, Ethanol and n-Propanol at Different Temperatures (303K, 308K and 313K)
Author : Babita Bhardwaj, Seema Shukla & S.S. Yadav
Keyword : Ultrasonic velocity, density and viscosity, phenol

Ultrasonic velocity, density and viscosity were determined for phenol in methanol, ethanol and npropanol at different temperatures (303K, 308K and 313K). From the experimental data obtained, isentropic compressibility (/s), shear relaxation time (0s), intermolecular free length (Lf), apparent molar compressibility (k), solvation number (Sn), molar sound velocity (R), relative association (RA), etc. were determined. These results indicate that phenol behaves as a simple electrolyte in the solvents used (methanol, ethanol and n-prapanol) and the results were interpreted in terms of Bachem’s equation. The electrolytic behaviour of phenol is in the order of methanol > ethanol > npropanol.
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