The purpose of this study is to establish more rational and practical planning theory for amusementpark. It analyze and considerate the fluctuation of the people who come and use a Tong-Ch'on amusementpark. The results drawn from this research work are as follows ; There are considerable correlation between use fluctuation and some factors. The factors are season (spring, summer, autumn) as a time, temperature, cloud amount, duration of sunshine, weather (rainy day) as a climate and date (weekday, holiday) as a social system. The important variables are temperature, cloud amount, duration of sunshine and date (week day, holiday) to estimate the user of amusementpark. I can reduce the following two types of regression models. 1. () 2. () Y ; Number of User TEM ; Temperature CLO ; Amount of cloud SUN ; Duration of Sunshine WI ; Weekday W3 ; Holiday Those model is inorder to estimate the user for management of Tong-Ch'on amusementpark and use on the computation of facility size for reconstruction. Besides the amusementpark, city park and outdoor recreation area could estimate of user throuth this method. But, I am not sure about the regression models because I didn't apply the regression models to the other amusementpark, city park or outdoor recreation area. Therefore, I think that this problem needs to study in the future.

This research project is to be carried out to propose the methodologies for improving the structural maintenance system by performance concepts consideration. The main contents of this project are performance(Safety, Durability, Serviceability etc) based management methodology. If this project is performed successfully, it is expected that the infrastructures can be effectively managed in Korea.

This research project is to be carried out to propose the methodologies for improving the structural maintenance system by performance concepts consideration. The main contents of this project are performance based management methodology, report card for infrastructures etc. If this project is performed successfully, it is determined that the infrastructures can be effectively managed in Korea.

Rearing experiments were conducted using several regimes combined with different photoperiods and water temperatures to investigate the role of temperature and photoperiod as environmental cues regulating reproduction in red marbled rockfish, Sebastiscus tertius. The initial gonadosomatic index (GSI) was 1.62±0.32% and that in the 15˚C control was 7.01±0.46% at the end of the experiment. The highest GSI was 9.10±0.35% in the 12L:12D photoperiod-treated fish. The highest GSI at 19˚C was 15.03±0.86% in the 12L:12D photoperiod treatment. The initial hepatosomatic index (HSI) was 3.09±0.72% and that in the 15˚C control was 3.88±0.45%. The highest HSI was 4.00±0.56% in the 15L:9D treated fish. The highest HSI at 19˚C was 4.05±0.63% in the 12L:12D treated fish.

The purpose of this study is to investigate the mechanical property of concretes using surface treated lightweight aggregate. Slump of concretes using surface treated lightweight aggregate measured 120~140mm, which are lower than slump of NWAC. Compared to compressive strength of NWAC, compressive strength of concretes using surface treated lightweight aggregate showed a level of 82.8~95.9%.