Search Results - (Author, Cooperation:M. Ravichandran)

2018-10-02

Institute of Physics (IOP)

1757-8981

1757-899X

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

2018-09-21

Institute of Physics (IOP)

1757-8981

1757-899X

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

2013-10-29

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Animals ; Antigens, CD36/*metabolism ; CHO Cells ; Cricetulus ; HeLa Cells ; Humans ; Lysosome-Associated Membrane Glycoproteins/*chemistry/metabolism ; *Models, Molecular ; Protein Binding ; Protein Structure, Tertiary

2018-12-04

Cold Spring Harbor Laboratory Press

0890-9369

Biology

1089-7623

AIP Digital Archive

Physics

Electrical Engineering, Measurement and Control Technology

A spherical field meter has been developed to measure the atmospheric electric field vector above the ground surface. Its calibrations in the radial and linear electric fields and the method to find out the distortion coefficients are described. Extensive measurements of the components of the atmospheric electric field and the resulting electric field vector in fair weather and during the passage of a small dust devil over the spherical field meter are reported. Observations made at Pune (18°32′ N, 73°51′ E, 559 m above msl), show that in fair weather the horizontal component of the electric field may be upto 5% of the vertical component. Variations in the horizontal components of the electric field when averaged over an interval of more than 4 s are small and are generally but not always identical to its vertical components. However, at a frequency of few Hertz, variations in the horizontal components may be comparatively larger and generally independent of the vertical components. Observations made during the passage of a small dust devil over the spherical field meter show the development of appreciable horizontal component of electric field above the ground surface. These observations demonstrate the capability and reliability of the spherical field meter to measure the magnitude and direction of the electric field vector. They also demonstrate that the movement of small space charge pockets close to the surface may cause the development of horizontal component of the electric field. © 1999 American Institute of Physics.

Electronic Resource

1077-3118

AIP Digital Archive

Physics

The ability of scanning electron acoustic microscopy (SEAM) to characterize ceramic materials is assessed. SEAM images of Vickers indentations in SiC whisker-reinforced alumina clearly reveal not only the radial cracks, the length of which can be used to estimate the fracture toughness of the material, but also reveal strong contrast, interpreted as arising from the combined effects of lateral cracks and the residual stress field left in the SiC whisker-reinforced alumina by the indenter. The strong contrast is removed after the material is heat treated at 1000 °C to relieve the residual stresses around the indentations. A comparison of these observations with SEAM and reflected polarized light observations of Vickers indentations in soda-lime glass both before and after heat treatment confirms our interpretation of the strong contrast.

Electronic Resource

1460-2695

Blackwell Publishing Journal Backfiles 1879-2005

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

In this work, the structural integrity of the critical components of the fast breeder reactor (FBR) that are subjected thermal striping is assessed using a fracture mechanics approach based on linear elastic fracture mechanics (LEFM). The structural integrity is assessed in terms of the actual life of the component for a particular difference between the hot and cold liquid temperatures at the critical mixing velocities. A generalized procedure is attempted for the computation of fatigue life. It is demonstrated in this work that the analysis procedure adopted is computationally very efficient. Green's function method is used for transient mode I crack propagation analysis. An inherent parallelism in the method is exploited for computational efficiency. A distributed computing environment is, therefore, used to demonstrate the effectiveness of Green's function method for crack propagation analysis for the kind of problem solved in this work. A simple idealization in the form of flat plate geometry is used in a numerical example to show the computational efficiency. The method shows a good scale-up justifying the benefit of using a distributed computing environment given a large amount of input data for the thermal striping problem.

Electronic Resource

1432-1114

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Abstract Experimental and numerical investigations of the three-dimensional flowfields in an isothermal model of an afterburner are presented. Five-hole pilot probe measurements along the entire length of the model in three different azimuthal planes, allow the determination of three mean velocity components which provide comprehensive information to aid understanding of such complex flows. The numerical calculations are performed using a SIMPLE based algorithm with staggered grid arrangement. The standardk-ɛ model is used for physical modeling. The numerical results agree quite satisfactorily with the time-mean velocity measurements. The predicted turbulence kinetic energy contours have also been presented.

Electronic Resource

1573-4811

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Electronic Resource