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정기범,Seohui Kim,이용우 물리치료재활과학회 2024 Physical therapy rehabilitation science Vol.13 No.1
Objective: The purpose was to investigate changes in mechanical properties, range of motion, and grip strength of the forearm muscle in 13 students depending on the wrapping direction of the floss band. Design: A single-blind, crossover studyMethods: Subjects were randomly assigned to the wrapping direction of the flossing band and then performed a concentric exercise of the wrist flexors using a Flex-Bar. Intervention A applied the flossing band in a right spiral direction, Intervention B applied the flossing band in a left spiral direction, and Intervention C performed the exercise alone. All subjects used their dominant right hand, and pre- and post-assessments were conducted between interventions. To analyze differences in changes between groups pre- and post-, all results were subjected to one-way ANOVA, followed by Scheffe's test as a post-hoc analysis. The paired samples t-test was used to analyze the difference between pre- and post-change within groups. Results: First, in the mechanical properties of the Flexor carpi ulnaris (FCU) muscle, interventions A and B significantly improved muscle tone and stiffness than intervention C (p<0.05), and intervention A showed a significant decrease in decrement (muscle elasticity) than intervention B (p<0.05). Second, interventions A and B showed significant improvement in grip strength than intervention C (p<0.05). Conclusions: The right spiral direction of the flossing band tended to increase the elasticity of the muscles compared to the left spiral direction. Therefore, in future studies, it is necessary to choose the direction of the flossing band to increase the elasticity of the muscles.
칸막이 공조 시스템의 급기구 위치와 급기 방향 조절에 따른 열환경 특성
정기범,최상곤 대한건축학회 2004 대한건축학회논문집 Vol.20 No.4
A partition supply system can provide highly personalized environmental control. The supply air is brought up through raised floors and supplied to outlets located on the partition panels. This paper aims to find out the best location of outlets for the personalized environmental control within a personal task area. Real scale experiments were conducted to allow comparison of outlet designs within a personal task area. Experimental results indicate that two way outlet is better than upper only or lower only case to improve the supply air distribution efficiency of the personal task area. Thermal characteristic comparisons were made among variable cases by the redirection of the supply air. Experimental results suggest that outlets should have operable directional grills that the occupant can control to avoid draft. Such a system can allow an occupant to personally control their immediate environment, resulting in higher productivity.