This study was to examine the causal relationships among extraneous variables, social participation, and life satisfaction among the elderly persons. This study analyzed 4014 elderly persons out of 2010 KLoSA. The path analysis and mediating effects were examined by AMOS. Except educational level, family income, health status, functional capacities, K-MMSE, and CES-D10 were direct effects on the life satisfaction among the elderly persons. The mediating effects of causal meeting activities, leisure activities, and membership based activities were significant on life satisfaction. This study proposed implications of improving life satisfaction for the elderly through utilizing of social participation activities.

In recent years, extension of life span of buildings is becoming an important issue in our society. To improve the life span of buildings, rhamen structure construction and long-spanned structures are advantageous. And in order to achieve this goal, structural elements of buildings must be light and slender. As an alternative method, general porous slabs are used frequently domestically and internationally. But the study on the porous slabs using T-deck plate and assembly of light weight precast construction is insufficient at present. In this study, flexural and fatigue tests were performed on six specimens to verify structural performance and serviceability. The main parameters of the specimens were light weight and T-deck plate construction possibility as well as slab thickness. The test results indicated that the strength of porous slabs using T-deck plate and assembly of light weight were much better than general RC slabs and porous slabs without T-deck plate. And stiffness was much better than that of other tested slabs.

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