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Research paper : A new density standard replaced from water (K. Fujii)−198 Synthesiology - English edition Vol.1 No.3 (2009) silicon single-crystals.Answer (Kenichi Fujii)For Type 2 Basic Research scenario, when we started research to improve uncertainty of volumetric technology for spheres around 1984, it was necessary to conduct volume measurement of quartz spheres for absolute measurement of the density of water that was being conducted at the former National Research Laboratory of Metrology. While the volumetric accuracy needed for this study was about 10-7, the reason for obtaining volume at higher accuracy was to improve the uncertainty of the Avogadro constant. Although development of volumetric technology required for density standard can be considered Type 1 Basic Research, the reason for improving volumetric accuracy to 10-8 was the development of polishing technology for silicon spheres at the CSIRO in 1987, and this development was also aimed at improving the uncertainty of the Avogadro constant.5 Description of Product Realization Research in society and industryQuestion (Mitsuru Tanaka)The Author contributed greatly to the dissemination of research result through instructions to registered calibration service providers, certification process, and creation of (44)−technological standard for certification. I think you should also mention the relationship between the AIST’s advice and the National Tax Agency’s notification on alcohol table. Also, I think you should including international activities such as the Working Group on Density of the CCM.Answer (Kenichi Fujii)In Section 4, I added that the author et al conducted CIPM key comparison for density for first time in the world to verify the international equivalence of the density standard, as well as our contribution to activities in the WGD/CCM/CIPM.In Section 5 Establishment of traceability system for density and contribution to society, I added our contributions including technical advice to registered calibration service providers, work on JCSS certification process, and creation of technology standard of JCSS certification. Much time were spend on these activities, and I held several meetings and sessions to make sure people working on calibration services would correctly understand the key points in conducting traceable measurement. Also, talking to the people in calibration service was extremely useful opportunity to know which technologies and information were desired by end users, and I think this is important process for AIST to make contributions to the society.

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