PURPOSES : The aim of this study is to determine the maintenance costs for a reasonable preliminary feasibility study, feasibility study, or evaluation METHODS : This study was based on government budget execution and budget execution data for expressways, national highways, cable-supported bridges and long-tunnels. For the expressway, data obtained from the Korea Expressway Corporation were used. For the national highway, data was obtained from the Ministry of Land, Infrastructure and Transport. Similarly, data collected from expressway maintenance costs and the Korea Infrastructure Safety and Technology Corporation were used for long tunnels and cable-supported bridges, respectively. The items for highway maintenance cost were reclassified more rationally to facilitate the calculation of the maintenance costs. The replacement cycle for each item was also calculated based on the budget expenditure data. RESULTS : The results of this study showed the standard maintenance cost model for expressways, national highways, cable-supported bridges, and long-tunnels. In other words, a basis for predicting reasonable maintenance costs was prepared for a feasibility study. CONCLUSIONS : The reliability of the maintenance cost results was improved and it was more consistent with actual costs compared to the results of previous studies. It can be used as a basis for estimating the maintenance cost of a preliminary feasibility study and feasibility evaluation in the future.

목적: 본 연구는 2.5D와 3D 동영상에 대한 시각 인지과정을 비교하기 위하여 실시되었다. 방법: 10명의 피검자들이 2D, 2,5D, 3D 동영상을 관람하는 동안 뇌파의 강도를 측정하였으며, 감마(Υ) 파와 알파(a)파의 평균상대강도를 계산하여 서로 비교하였다. 결과: 2D 동영상을 시청할 때와 비교하면 Υ파의 경우는 3D와 2.5D 동영상을 시청할 때 모두 강도가 증가하였지만, a파의 경우는 2.5D동영상을 시청할 때 강도가 감소하는데 반하여 3D동영상을 시청할 때는 강도의 변화가 없었다. 결론: 이러한 결과는 2.5D 동영상의 시각 인지과정이 3D동영상의 경우와 완전히 동일하지는 않다는 것을 암시하고 있다.