Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)
Online ISSN : 2185-6540
ISSN-L : 2185-6540
Volume 75, Issue 1
Displaying 1-4 of 4 articles from this issue
Paper (In Japanese)
  • Noriaki MATSUSHITA
    2019 Volume 75 Issue 1 Pages 1-10
    Published: 2019
    Released on J-STAGE: January 20, 2019
     After the Kumamoto earthquake, the government implemented a temporary subsidy system “Fukkouwari” for tourists to reduce damage by harmful rumors. It has been reported that many travelers used it, but the effect of “Fukkouwari” is not evaluated quantitatively. Hence, this study analyzed the impact of restoration measures “Fukkouwari” to recovery process of tourism industry using “Travel and Staying Statistics” in each prefecture of Kyushu region.
     As a result, Kumamoto prefecture showed less increase in tourists than Oita prefecture, although Kumamoto and Oita prefectures had the same subsidy rate. Effect of subsidy system to the recovery process had been seemingly affected by the damage of sightseeing resources, accommodation facilities, road networks, etc. In addition, the areas other than Kumamoto and Oita prefectures did not have enough effect to significantly alter the recovery trend. The results of analysis provided useful information to improve design of subsidy system such as budget scale, target district, discount rate, and discount period.
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  • Masashi MIWA, Tatsuo OYAMA
    2019 Volume 75 Issue 1 Pages 11-28
    Published: 2019
    Released on J-STAGE: January 20, 2019
     Through appropriate maintenance work, railway track irregularities must be kept at a satisfactory level in terms of train derailment accident risk. Therefore, we have developed an optimal decision making model for setting upper bound for the irregularities, track inspection period and tamping work schedules in accordance with the magnitude of the risk. In order to determine them, the model was developed based on the result of statistical model analyses in consideration of the influence of the accident and the probability of the accidents caused by track irregularities. Using the model, we can obtain an optimal track maintenance policy and schedule in consideration of the risk.
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Technical Report (In Japanese)