Contents: Foreword. 1. Neutrosophic Bipolar Vague soft topological spaces and its applications/Anjan Mukherjee. 2. On Lacunary convergence of sequences/Binod Chandra Tripathy. 3. Computation of limit cycle solution of forced Rayleigh Van Der Pol equation: an application of improved renormization group method and scale free analysis/Aniruddha Palit. 4. Utility of natural products in combating covid-19 pandemic situation/Pradip Debnath and Sudhan Debnath. 5. Literature infuses indomitable spirit to face the challenges of pandemic covid-19/Baburam Swami. 6. Optimality of two person games under fuzzy fields/Runu Dhar and Abhishek Chakraborty. 7. Generation and impacts of plastic pollution in the Agartala municipal corporation: a survey/Debadatta Adak, Arghyadip Debroy and Shekhar Das. 8. Fisch cum Duck farming - an ecologically viable and economically profitable integrated fish farming technique-a review/Saumen Chakrabarti and Manoj Nath. 9. The analytical study of the style of ancient, mediaeval and modern architecture of Tripura/Mandira Dasgupta and Rajesh Bhowmik. 10. Linguistic impact of the covid-19 pandemic/Moumita Dey. 11. Screening of human body temperature and infrared imaging-a review/Dipak Hrishi Das and Runu Dhar .