Etsuo Yamamura

Using Geographical Information Systems to Evaluate Decentralized Management of Municipal Food Waste

The implementation of decentralized waste management plans is stymied by an inability to communicate the costs and benefits of these plans in the decision making arena. The use of Geographical Information Systems (GIS) is vital toward carrying out feasibility tests, life-cycle assessments, and in presenting the results thereof. A preliminary GIS-based analysis was done for a decentralized in-vessel composting scheme for Bangkapi Ward in Bangkok, Thailand. The use of GIS in the introduction of decentralized waste management is discussed in general.

Land hazards of the Kushiro-Oki earthquake of 15 January 1993

At 8:06, Friday, 15 January 1993, when most residents in Kushiro Bay Area were at home having just finished dinner on the Coming of Age Holiday. An earthquake of 7.8 magnitude reached its maximum intensity. This earthquake was centered about 20 km South of Kushiro at a depth of 103 km. It had disastrous effects on the highly developed modern urban district in the Kushiro Bay Area. This earthquake is of special interest seismologically because it was triggered by the activity of a segment of the main. The study of this earthquake is of crucial importance for researchers who work on urban seismic risk evaluation, lifeline earthquake engineering and countermeasure against soil liquefaction. Accordingly, this report focuses on the damage of land hazards to civil engineering structures including lifeline facilities. Regarding the lifeline system, not only structural damage of the components but also functional damage of the entire systems are of importance.At 8:06, Friday, 15 January 1993, when most residents in Kushiro Bay Area were at home having just finished dinner on the Coming of Age Holiday. An earthquake of 7.8 magnitude reached its maximum intensity. This earthquake was centered about 20 km South of Kushiro at a depth of 103 km. It had disastrous effects on the highly developed modern urban district in the Kushiro Bay Area. This earthquake is of special interest seismologically because it was triggered by the activity of a segment of the main. The study of this earthquake is of crucial importance for researchers who work on urban seismic risk evaluation, lifeline earthquake engineering and countermeasure against soil liquefaction. Accordingly, this report focuses on the damage of land hazards to civil engineering structures including lifeline facilities. Regarding the lifeline system, not only structural damage of the components but also functional damage of the entire systems are of importance.

A study on model reference adaptive pollution control in enclosed coastal sea

Abstract This paper represents an attempt to present a model of the ecologic-economic analysis on land and ecological activities in an enclosed coastal sea. Specifically, we are interested in the insights gained into the balance of inter-field repercussion by using Hermite Inverse Matrix Analysis which shows the total effects of inter-field propagation. Furthermore, for the achievement of model reference pollution reduction, we investigated a path which converges to the reference model and the adaptation processes of system and its stability by using Model Reference Adaptive Input-Output Method. This model is to clarify how the actual field activities would converge to the reference structure when the reference field structure is looked over.

SUPPORT SYSTEM OF DECISION-MAKING FOR MANAGEMENT OF RIVER ENVIRONMENT

Recently urban and rural planning decision makers have often required opinions and ideas of inhabitants in the formulation of their respective plans. At the same time we should consider how to evaluate vague or subjective opinions of inhabitants appropriately. From such a viewpoint, the aim of this study is to propose a techinque for assessing vagueness of human opinions with utility for social measures. In this case, we apply this technique to evaluate the social preference for infrastructural development schemes. The social measure to be assessed are attributes with respect to amenity and culture. Some infrastructural development schemes in river basin of an urban area are examined. We propose the fuzzy contributive rule as a technique for evaluating the preferential scheme out of several infrastructure development alternatives. We construct the structural model of the preferences of each interest group on the basis of individual utility score. The degree of similarity and the defree of stability among group structural models are defined and by using these indexes actual models are evaluated.