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Abstract-Uniaxial tensile properties of hexagonal boron nitride nanoribbons and dependence of these properties on temperature, strain rate, and the inclusion of vacancy defects have been explored with molecular dynamics simulations using Tersoff potential. The ultimate tensile strength of pristine hexagonal boron nitride nanoribbon of 26 nm x 5 nm with armchair chirality is found to be 100.5 GPa. The ultimate tensile strength and strain have been found decreasing with increasing the temperature while an opposite trend has been observed for increasing the strain rate. Furthermore, the vacancy defects reduce ultimate tensile strength and strain where the effect of bi-vacancy is clearly dominating over point vacancy.

This study aims to investigate coping strategies used by Bangladeshi citizens during the COVID-19 pandemic. Design: Prospective, cross-sectional survey of adults (N=2001) living in Bangladesh. Methods: Participants were interviewed for socio-demographic data and completed the Bengali translated Brief-COPE Inventory. Statistical data analysis was conducted using SPSS (Version 20). Results: Participants (N=2001), aged 18 to 86 years, were recruited from eight administrative divisions within Bangladesh (mean age 31.85, SD 14.2 years). Male to female participant ratio was 53.4% (n=1074) to 46.6% (n=927). Higher scores were reported for approach coping styles (29.83, SD 8.9), with lower scores reported for avoidant coping styles (20.83, SD 6.05). Humor coping scores were reported at 2.68, SD 1.3, and religion coping scores at 5.64, SD 1.8. Both men and women showed similar coping styles. Multivariate analysis found a significant relationship between the male gender and both humor and avoidant coping (p <.01). Male gender was found to be inversely related to both religion and approach coping (p<.01). Marital status and education were significantly related to all coping style domains (p<.01). The occupation was significantly related to approach coping (p <.01). Rural and urban locations differed significantly in participant coping styles (p <.01). Factor analysis revealed two cluster groups (Factor 1 and 2) comprised of unique combinations from all coping style domains. Conclusion: Participants in this study coped with the COVID-19 pandemic by utilizing a combination of coping strategies. Factor 1 revealed both avoidant and approach coping strategies and Factor 2 revealed a combination of humor and avoidant coping strategies. Overall, higher utilization of approach coping strategies was reported, which has previously been associated with better physical and mental health outcomes. Religion was found to be a coping strategy for all participants. Future research may focus on understanding resilience in vulnerable populations, including people with disabilities or with migrant or refugee status in Bangladesh.

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