Hall Effect in the Viscous Incompressible Flow Through a Rotating Channel Between Two Porous Walls

Exact solutions for the velocity and induced magnetic field distributions, accounting for Hall currents have been obtained for the flow of a conducting porous walls under the action of a constant pressure gradient and in the presence of a uniform magnetic field transversely applied to the flow. Further, the channel is rotated with constant angular velocity about an axis perpendicular to the walls. For the purpose of mathematical simplicity, the magnetic prandtl number is assumed to be negligible. An expression for the boundary layer thickness dependent on Taylor, Hartmann, suction Reynolds numbers and Hall parameter has been obtained

Kharif Sorghum in Karnataka: An Economic Analysis

Sorghum, which once occupied more than 18 M ha of area in the country, has been on a continuous decline during the past two decades and has fallen down to 10.39 M ha. Most of the decline in area has occurred in kharif sorghum. This warrants critical examination of the changing scenario of kharif sorghum and identification of the reasons thereof. For the macro analysis, secondary data on various aspects of kharif sorghum have been used, whereas the farm survey data have been used to draw the inferences at the micro level with respect to changing scenario of kharif sorghum. The growth rates in area, production and productivity of kharif sorghum have been computed. The Herfindahl index has been computed to find out crop diversification in the sample districts of Dharwad and Belgaun. The deceleration in the kharif sorghum area in the overall period 1970-71 to 1997-98 and different sub-periods has been found due to the diversion of kharif sorghum area to more remunerative crops like oil seeds (groundnut and sunflower), and pulses. Belgaum district displayed a moderate degree of crop diversification compared to that of Dharwad district. Unfavourable prices, declining yields, inadequate credit and adverse climatic conditions have been identified as the major reasons for the replacement of kharif sorghum crop in the two sample districts. The net returns and benefit-cost ratio have been found low in the cultivation of kharif sorghum compared to those of its competing crops, viz. cotton, green gram and groundnut.Agricultural and Food Policy,

Secondary Flow and Heat Transfer of Two Incompressible Immiscible Fluids Between Two Parallel Plates in a Rotating System

When a straight channel formed by two parallel plates, through which two immiscible fluids are flowing under constant pressure gradients is rotated about an axis perpendicular to the plates, secondary motion is set up. The secondary motion is analysed in detail for constant angular velocity ohm', lambda the ratio of their viscosities. The associated heat transfer problems, when the plate temperatures are equal and different, have also been studied

Magnetohydrodynamic Couette Flow and Heat Transfer in a Rotating System

The influence of electrode geometry for the MHD Couette flow in the presence of the Hall current and heat transfer of a conducting liquid in a rotating system has been studied

“ Thioureidopeptide”: Novel Synthon for the Synthesis of N, N′, N″-Trisubstituted Guanidinopeptide Mimics

The synthesis of N α-protected N,N′,N″-trisubstituted guanidinopeptide mimic molecules suitably decorated in peptide backbone has been delineated in one pot employing HgCl2 as a desulphurizing agent. Chiral N α -protected thioureidopeptide esters were employed as synthons for the synthesis of title molecules. The protocol is simple and the reaction conditions employed were mild, amenable to the amino acid chemistry

DELIVERY PERFORMANCE MEASUREMENT IN AN INTEGRATED SUPPLY CHAIN MANAGEMENT: CASE STUDY IN BATTERIES MANUFACTURING FIRM

Delivery performance provides an indication of how successful the supply chain is at providingproducts and services to the customer. This metric is most important in supply chain management asit integrates the measurement of performance right from supplier end to the customer end. Presentresearch is focused on a case study conducted in a leading batteries manufacturing firm in SouthIndia and analysis of elemental performances in overall delivery performance of an entire supplychain in an integrated approach. NLP and Dynamic Programming models have been used to getoptimal and sub-optimal solutions to help firms in benchmarking expected performance levels. Theeffect of learning has also been described with an empirical analysis

Dynamics Of Multi layered Composite Shell With Shape Memory Alloys

The use of different composite materials has been continuously growing in recent years. Although many applications for composite materials have been identified. Extensive research is still being carried out in order to expand this field. New materials and technologies have been researched. One such new application is the integration of shape memory materials within composite materials. In this study certain aspects of the dynamic behavior of a multilayered composite shell with shape memory alloy (SMA) wires have been investigated. The influence of SMA wires, the orientation and the thickness to diameter ratio and different boundary conditions, on changes in critical load, the natural frequencies and modes of vibration of the shell have been studied and discussed in the present study. The results presented are obtained by the use of finite element method. The analysis both static and modal has been carried out using ANSYS 12.0. The shape memory alloys possess the inherent ability to change their material properties in particularly their young’s modulus, damping capacity as well as great capacity for the generation of large internal forces. Integrating SMA’s within composite material structures potentially allow the active control of certain static and dynamic behaviour of the integrated structures. Precise tuning of SMA components enables the control of certain static and dynamic characteristics of composite material structures, notably deflections and shape, natural frequencies and modes of vibrations. SMA components embedded into or bonded to composite material structures can be utilized in two different ways. They are Active Property Tuning Method and Active Strain energy Tuning Method. These techniques induces a special property in SMA components integrated with appropriate composite material structures leads to high generation of high recovery stresses

Nonlinear Stability in the Generalised Photogravitational Restricted Three Body Problem with Poynting-Robertson Drag

The Nonlinear stability of triangular equilibrium points has been discussed in the generalised photogravitational restricted three body problem with Poynting-Robertson drag. The problem is generalised in the sense that smaller primary is supposed to be an oblate spheroid. The bigger primary is considered as radiating. We have performed first and second order normalization of the Hamiltonian of the problem. We have applied KAM theorem to examine the condition of non-linear stability. We have found three critical mass ratios. Finally we conclude that triangular points are stable in the nonlinear sense except three critical mass ratios at which KAM theorem fails.Comment: Including Poynting-Robertson Drag the triangular equilibrium points are stable in the nonlinear sense except three critical mass ratios at which KAM theorem fail

Dislocation constriction and cross-slip in Al and Ag: an ab initio study

A novel model based on the Peierls framework of dislocations is developed. The new theory can deal with a dislocation spreading at more than one slip planes. As an example, we study dislocation cross-slip and constriction process of two fcc metals, Al and Ag. The energetic parameters entering the model are determined from ab initio calculations. We find that the screw dislocation in Al can cross-slip spontaneously in contrast with that in Ag, which splits into partials and cannot cross-slip without first being constricted. The dislocation response to an external stress is examined in detail. We determine dislocation constriction energy and critical stress for cross-slip, and from the latter, we estimate the cross-slip energy barrier for the straight screw dislocations