Vol.1 No.4 2008

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−320 AbstractsSynthesiology Vo.1 No.4(2008)integrated research project for a comprehensive risk assessment system; this project includes fundamental knowledge, database formulation, commercialization of technology, and introduction of the research results to a social system. This paper presents a scenario in Synthesiology, the integration of each part of the research results, and discusses the spiral processes involved in the implementation of risk assessment. Development and applications of photocatalytic technology- Industrialization of sustainable eco - technology -Hiroshi TaodaMaterials Research Institute for Sustainable Development, AIST110 Nishiibara-cho, Seto, 489-0884, JapanPhotocatalysts are capable of decomposing organic compounds such as toxic and bioresistant pollutants into non toxic gases in the presence of light. Material development and application of a number of photocatalysts have been carried out taking into consideration many factors including application, cost, as well as applicable regulations. As a result of these efforts, a variety of new photocatalytic products are now on the market.Is an angular standard necessary for rotary encoders?- Development of a rotary encoder that enables visualization of angle deviation -Tsukasa WatanabePlanning Headquarters, AISTNational Metrology Institute of Japan, AISTUmezono 1-1-1, Tsukuba 305-8563, JapanA rotary encoder is an angular readout device that reads an optical pattern written on the circumference of a shaft similar to a 360 degrees protractor and outputs angle position information. Since the output of a rotary encoder deviates from the true angle position due to optical pattern errors or eccentricity of the shaft about the rotation axis, users have encountered difficulty in ensuring the reliability of the angle information derived from an encoder. In order to solve this problem, “SelfA: A Self-calibratable Angle device” was developed. The SelfA can detect a variety of angle deviation sources by itself, and has the ability to output an angular calibration value. This SelfA can detect the angle deviation value from an optical encoder which has been a black box until now and enables “visualization” of these factors quantitatively.(74)−

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