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Propagation of shear waves in viscoelastic medium at irregular boundaries

100%

Chattopadhyay A. , Gupta S. , Sharma V. K. , Kumari P.

Acta Geophysica

2010

tom Vol. 58, no. 2

196-214

The aim of the paper is to study the shear wave propagation in a viscoelastic layer over a semi-infinite viscoelastic half space due to irregularity in the viscoelastic layer. It is of great interest to study the propaga-tion of shear waves in the assumed medium having a non planar boundary due to its similarity to most of the real situations. The perturbation method is applied to find the displacement field. The effect of complex wave number on dissipation factor is analysed. Finally, as an application, the result obtained has been used to get the reflected field in viscoelastic layer when the shear wave is incident on an irregular boundary in the shape of parabolic irregularity as well as triangular notch. It is observed that the amplitude of this reflected wave decreases with increasing length of the notch, and increases with increasing depth of the irregularity.

Adsorption behavior of cadmium and nickel from aqueous solution by Saraca indica leaf powder

88%

Srivastava M. M. , Chauhan A. , Kumari P. , Sharma P. , Srivastava S.

2005

tom Vol. 31, no. 3

59--70

The development of economic and efficient processes for the removal of toxic metals from water bodies has become a priority task for environmentalists. Biosorption processes arc tangible alternatives to traditional methodologies, particularly if low metal concentration, large volume and cost arc considered. The present communication reports the unexploited sorption properties of the Saraca indica leaf powder (S1LP) for the removal of Cd(ll) and Ni(II) from aqueous media. Sorption studies using standard practices were carried out in batch experiments as a function of biomass dosage, metal concentration, contact time, particle size and pH. Sorption studies result into the standardization of optimum conditions for the removal of Cd(II) - 92.60% and Ni(II) - 46.20% as follows: biomass dosage (4.0 g), metal concentration (Cd(II) 10 ug/cm3, Ni(II) 10 ug/cm3) and volume of the test solution (200 cm3) at pH 6.5 for Cd(II) and Ni(II). The present study explores for the first time, the efficacy of Saraca indica leaf powder as a novel and environment friendly possibility to remediate heavy metal contaminated water in a cost efficient manner.

Adsorption behavior of cadmium and nickel from aqueous solution by Saraca indica leaf powder

88%

Srivastava M. M. , Chauhan A. , Kumari P. , Sharma P. , Srivastava S.

Archiwum Ochrony Środowiska

2005

tom 31

nr 3

Prediction of fruit production in India: an econometric approach

63%

Ray S. , Mishra P. , Ayad H. , Kumari P. , Sharma R. , Kumari B. , Al Khatib A. M. G. , Tamang A. , BisWas T.

Journal of Horticultural Research

2023

tom 31

nr 1