著者
横畑 綾治 石田 悠記 西尾 正也 山本 哲司 森 卓也 鈴木 不律 蓮見 基充 岡野 哲也 森本 拓也 藤井 健吉
出版者
一般社団法人 日本リスク学会
雑誌
リスク学研究 (ISSN:24358428)
巻号頁・発行日
vol.30, no.1, pp.5-28, 2020-09-25 (Released:2020-10-09)
参考文献数
87

Coronavirus disease 2019 (COVID-19) is an emerging social risk with a rapid increase in cases of 5,200,000 and deaths of 330,000 (23/May/2020) since its first identification in Wuhan China, in December 2019. The COVID-19 is spreading all over the world as an emerging pandemic, and global society need fundamental risk management concepts against SARS-CoV-2 infection. Human-to-human transmissions have been facilitating via droplets and contaminated surfaces to hands. Therefore, we developed the systematic review comprehensively using available information about coronaviruses on environmental surfaces and inactivation mechanisms of antiviral chemicals possible to apply as chemical disinfectants. The analysis of literatures revealed that SARS-CoV-2 can persist on environmental surfaces like plastics and glasses for up to 7 days, but might be efficiently inactivated with 45–81% ethanol, 50–80% 2-propanol, 0.05–0.3% benzalkonium chloride, various detergents, >0.5% hydrogen peroxide or >0.045% sodium hypochlorite within 30 sec–10 min or 30 min. As no specific therapies are available for SARS-CoV-2, we propose the risk mitigation on the contact infection route by anti-virus household products is promising for prevention of further spread via hands to mouth, nose, and eyes. and to control this novel social problem.
著者
上田 紘司 山田 浩也 石田 悠朗 広瀬 茂男
出版者
一般社団法人日本機械学会
雑誌
ロボティクス・メカトロニクス講演会講演概要集
巻号頁・発行日
vol.2013, pp."2A2-K03(1)"-"2A2-K03(3)", 2013-05-22

For robot arms, wrist mechanisms are important elements for handling ability. We have proposed a heavy-duty wrist mechanism with a large motion range named, "2-DOF Spherical Parallel (2DSP) mechanism." The 2DSP mechanism is driven by a 2-DOF spherical parallel mechanism and supported by a universal joint located at its center. In this paper, we propose a method to maximize workspace in avoidance of singularities or too small output torque. The test model was developed, and the feasibility of the proposed method was verified.