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๚F R 9๚i jP6`18 ๊F ฉRRูUKZ~i[บiUOXj uาF Dr. Ranjan Gupta (IUCAA, Pune India) ญ\ฺ่FTheoretical modeling efforts of light scattering by non-spherical grains uาF Dr. Asoke K Sen (Assam University) ญ\ฺ่FThe distribution of background star polarization for some dark clouds