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Objectives: The present work was aimed to assess the variation of grip strength with the changes of posture and body joint angles and to establish an optimal body posture and joint angle for the maximum grip strength for adult Bengalee population. Methods: Adult male (n=156) and female (n=224) were involved in this study. The hand grip strength was measured by using Lafayette hand grip dynamometer. Results: The results revealed that male subjects had a significantly greater (p<0.001) grip strength compared to that of female subjects and the highest grip strength was found in standing posture with elbow angle of 90 0 in both adult male and female subjects. Conclusions: From the results it may be recommended that the grip strength of Bengalee population may be measured in standing posture with elbow angle of 90 0 , shoulder angle of 180 0 , and the trunk and wrist in neutral positions to provide maximum force.

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This paper deals with an adaptation of an application of nonlinear heptagonal dense fuzzy number. The concept of linear and as well as non-linear for both symmetric and asymmetric heptagonal dense fuzzy number is introduced here. We develop a new ranking method for non-linear heptagonal dense fuzzy number also. Considering a backorder inventory model with non-linear heptagonal dense fuzzy demand rate we have utilized a modified centroid method for defuzzification. For decision maker's aspects, numerical examples, comparative study with other dense fuzzy numbers and a sensitivity analysis show the superiority of the nonlinear heptagonal dense fuzzy number. Finally, graphical illustrations are made to justify the model followed by a conclusion.Mathematics Subject Classification. 03E72, 90B50.