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569 results on '"Neogy, S."'

12. A Unified Framework for a Class of Mathematical Programming Problems

Author

Dubey, Dipti, Neogy, S. K., Basu, Ayanendranath, Editor-in-Chief, Biswas, Atanu, Associate Editor, Chaudhuri, Arijit, Associate Editor, Bhat, B.V. Rajarama, Editor-in-Chief, Bhatt, Abhay G., Editor-in-Chief, Daya Sagar, B.S., Associate Editor, Chattopadhyay, Joydeb, Editor-in-Chief, Delampady, Mohan, Associate Editor, Ghosh, Ashish, Associate Editor, Ponnusamy, S., Editor-in-Chief, Neogy, S. K., Associate Editor, Raja, C. R. E., Associate Editor, Rao, T. S. S. R. K., Associate Editor, Sen, Rituparna, Associate Editor, Sury, B., Associate Editor, Neogy, S.K., editor, Bapat, Ravindra B., editor, and Dubey, Dipti, editor

Published
2018
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40. Microstructural and mechanical property evolution of Ar9+ ion irradiated Zr-based alloys – effect of initial microstructure and alloying addition.

Author

Devi, Aruna, Menon, R., Sharma, S. K., Saini, S., Srivastava, A. P., Neogy, S., and Tewari, R.

Subjects
BINARY metallic systems, ALLOYS, POSITRON annihilation, NANOINDENTATION, MICROSTRUCTURE, DOPPLER broadening, METALLIC glasses
Abstract

This work endeavours to bring out the role of initial microstructural features and alloying additions in the irradiation response of a material. Three Zr-based binary alloys, namely Zr-0.17 wt.% O, Zr-0.33 wt.% Sn and Zr-2.5 wt.% Nb, with starting microstructures exemplifying annealing, hot-extrusion and cold-pilgering operations, respectively, were selected. The alloys were irradiated at room temperature using 315 keV energy Ar9+ heavy ion. Depth-dependent microstructural evolution of the alloys upon irradiation was assessed through positron annihilation Doppler broadening spectroscopy and grazing incidence X-ray diffraction, while nanoindentation probed the mechanical behaviour. Irradiation responses of the alloys garnered in terms of S-parameter, coherently scattering domain size, microstrain, dislocation density and hardness were compared. The observed differences were rationalized on the basis of (i) starting microstructural attributes of the alloys, which posed as sinks to the irradiation-induced point defects, and (ii) impact of alloying additions on diffusion and annihilation of these defects. [ABSTRACT FROM AUTHOR]

Published
2023
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41. A Note on Linear Complementarity via Two-Person Zero-Sum Games.

Author

Dubey, Dipti, Neogy, S. K., and Raghavan, T. E. S.

Subjects
ZERO sum games, LINEAR complementarity problem
Abstract

The matrix M of a linear complementarity problem can be viewed as a payoff matrix of a two-person zero-sum game. Lemke's algorithm can be successfully applied to reach a complementary solution or infeasibility when the game satisfies the following conditions: (i) Value of M is equal to zero. (ii) For all principal minors of M T (transpose of M) value is non-negative. (iii) For any optimal mixed strategy y of the maximizer either y i > 0 or (M y) i > 0 for each coordinate i. [ABSTRACT FROM AUTHOR]

Published
2023
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