Vol.6 No.3 2014
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Article : Portfolio structuring and social implementation in the development of complex technology (T. KOMAI)−181−Synthesiology - English edition Vol.6 No.3 (2013) risks on the living environment and ecosystem in addition to conventional soil contamination risks, the development of specific groundwater models, ecosystem models, and aquatic modes are in progress.Moreover, there are moves toward international standardization of risk assessment methods for soil contamination. GERAS is widely used in advanced nations as well as in Asian countries, and there are efforts to standardize the methodology for exposure and risk assessment incorporated in GERAS, by creating a new framework in the International Standard Organization (ISO). Also, the standardization of the domestic risk assessment technology looking at international standardization is important, and there are efforts across the agencies and ministries toward JIS standardization. In the future, the research results will be opened to the world, and international efforts to diffuse and expand risk assessment technologies will be done, mainly for the Asian countries. 4.3 Social implementation and contribution to earthquake disaster restorationSince the Great East Japan Earthquake and Tsunami of March 2011, the ways of R&D have been questioned. There emerged an attitude that the results obtained by research must be recognized by society as usable products and systems, and must be applicable to immediate issues that society faces. The environmental pollution that is the subject of GERAS was mainly geared for heavy metals and organic compounds that are regulated by the Soil Contamination Countermeasures Act, but after the earthquake, the R&D was accelerated for applications to tsunami deposits, debris of the earthquake and tsunami, and also for radioactive substances. This was done to enable social implementations by establishing risk assessment methods for diverse environmental pollution problems, and also in hopes of helping the disaster restoration.Due to the giant tsunami that hit the coasts of East Japan, voluminous amount of tsunami deposits and debris were generated. Since some of the deposits and debris contained harmful chemical substances such as arsenic and lead, risk control was necessary. The author and co-researchers spent about a year from 2011 surveying the physicochemical properties of the tsunami deposits, and conducted environmental risk assessment using GERAS. As a result, it was found that there were some regions with high risk of arsenic in the coastal area from Miyagi to Iwate Prefectures, and there was a need for risk management of groundwater.[2] Also, it was found that the environment risk of heavy metals was small for about 95 % of the region, and the deposited sand and gravel could be reused as building materials for reconstruction efforts. This research received an award of the Japan Society of Civil Engineers in 2013, as an important research for social implementation.The issue of soil contamination by radioactive substances such as caesium 137 is another extremely important issue from a social standpoint. Currently, new researches are being done to incorporate radioactive substances in GERAS, and we are now collecting observations on the behavior of radioactive caesium and other substances in the environment. Since the physicochemical properties of radioactive substances are known, it is possible to introduce them into GERAS at this point, but to improve the accuracy of risk assessment, it is necessary to clarify the interactions with soil particles and the migration properties according to their existence form. We are now organizing the parameters necessary for the GERAS analysis, such as building the database for soil properties in the East Japan region and monitoring the soil, water, and river sediments in Fukushima Prefecture.5 SummaryIn the development of the geo-environmental risk assessment system (GERAS), we went through valuable experiences from escaping the valley of death of R&D to the diffusion of results to society. As mentioned in this paper, new versions of GERAS have been developed with new viewpoints, and the results are being transmitted widely to society. Blessed with the efforts and good luck (serendipity) of the research team, the research seemed to progress smoothly. However, immediately after the earthquake, it felt as if we had entered the second valley of death, with added responsibility of supporting the reconstruction. Although still in the research stage, the course has been laid down for the completion of the assessment system that can handle assessment of tsunami deposits, earthquake debris, and radioactive substances. To overcome the difficulties and to fix the technology in society, sufficient understanding of the elemental technologies that comprise the system and the ability to fuse them are necessary.Finally, I have learned that the following commitments are necessary for the research leader.· Have many possessions in the attaché case (or drawer), meaning, accumulate various kinds of knowledge.· Optimize the combinations of the things inside the drawer, meaning, optimize the combinations of knowledge.· Clarify what are weak (and what are strong).· Take on society and industry and navigate the great sea or venture out.· Finally, show strong leadership.TerminologyTerm 1.Sparse modeling is one of the information analysis methods using the Bayes’ theorem. Recently in geosciences, it has been utilized for the extraction

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