- 著者
- Yuki KINOSHITA Tetsuo YAMADA Surendra M. GUPTA Aya ISHIGAKI Masato INOUE
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
- 巻号頁・発行日
- vol.10, no.3, pp.JAMDSM0052-JAMDSM0052, 2016 (Released:2016-07-01)
- 参考文献数
- 22
- 被引用文献数
- 8
For green supply chains, it is essential to disassemble and recycle end-of-life (EOL) assembled products for material circulation. In order to establish disassembly plants environmentally friendly and economical manner, a disassembly parts selection is often carried out. Each part has a different recycling rate and cost, and all parts have precedence relationships among disassembly tasks. Igarashi et al. (2014) [International Journal of Industrial Engineering and Management Systems, Vol.13, No.1, pp.52-66] proposed a disassembly parts selection method that is carried out in an environmentally friendly and economical manner with non-destructive or destructive disassembly with integer programming with ε constraint. However, calculated efforts are required to achieve optimum solutions for the ε constraint method. On the other hand, goal programming is well known as an effective way to solve multi-criteria decision-making problems. This study proposes a bi-objective disassembly parts selection with recycling rate and cost using goal programming, and analyzes multiple types of EOL assembled products and disassembly parts selection. First, an environmentally friendly and economical disassembly parts selection is addressed using a 3D-CAD and Recyclability Evaluation Method (REM) developed by Hitachi Ltd. Next, the environmentally friendly and economical disassembly parts selection is formulated with goal programming. Finally, a case study is quantitatively discussed by comparing different types of assembled products and goal programming parameters. It is demonstrated that the proposal method by goal programming in this study finds the same solutions with the lower number of numerical experiments as that with the ε constraint method.
- 著者
- Kokoro Ozaki Takuya Ohkubo Tetsuo Yamada Kotaro Yoshioka Masahiko Ichijo Takamasa Majima Shunsuke Kudo Takumi Akashi Keiji Honda Eisaku Ito Mayumi Watanabe Masaki Sekine Miwako Hamagaki Yoshinobu Eishi Nobuo Sanjo Satoru Ishibashi Hidehiro Mizusawa Takanori Yokota
- 出版者
- The Japanese Society of Internal Medicine
- 雑誌
- Internal Medicine (ISSN:09182918)
- 巻号頁・発行日
- vol.57, no.23, pp.3451-3458, 2018-12-01 (Released:2018-12-01)
- 参考文献数
- 29
- 被引用文献数
- 1 8
Progressive encephalomyelitis with rigidity and myoclonus (PERM) is an autoimmune disorder involving the brainstem and spinal cord and is sometimes associated with thymoma. We encountered a 75-year-old woman with typical PERM features, glycine receptor antibody, and thymoma. Her neurologic symptoms improved after thymectomy, but she unexpectedly developed anasarca with massive pleural effusions and hypoalbuminemia and finally succumbed to death. The autopsy showed edema and mononuclear infiltration in the pleura but no neuropathological findings typical of PERM. Effective treatment of PERM can reverse the neuropathological signs of encephalomyelitis. The autoimmune nature of anasarca is possible but not proven.
- 著者
- Masato TAKANOKURA Tetsuo Yamada Masaru Kawakami Seiko Taki Munenori KAKEHI
- 出版者
- ISCM Forum
- 雑誌
- Innovation and Supply Chain Management (ISSN:21870969)
- 巻号頁・発行日
- vol.10, no.2, pp.71-77, 2016-06-30 (Released:2016-12-21)
- 参考文献数
- 12
- 被引用文献数
- 2
A healthcare service was visualized by physical activity of healthcare workers ’tasks at a longterm care nursing home in Japan. Physical activity was measured by four healthcare workers using an activity meter. The workers ’tasks in healthcare services were quanti?ed by high-intensity activity of 3.0 METs (metabolic equivalents) or more, and by the relationship between physical activity and healthcare tasks. A higher workload for healthcare workers could be quanti?ed by the average physical activity and the cumulative time of high-intensity activity of 3.0 METs or more. Healthcare workers with signi?cant experience completed daily tasks effectively, but the tasks included high-intensity physical activity or a higher workload. In addition to observational methods, improvement of healthcare services should be considered by quantitative variables.
- 著者
- Kento IGARASHI Tetsuo YAMADA Masato INOUE
- 出版者
- 公益社団法人 日本経営工学会
- 雑誌
- 日本経営工学会論文誌 (ISSN:13422618)
- 巻号頁・発行日
- vol.64, no.2E, pp.293-302, 2013 (Released:2013-11-22)
- 参考文献数
- 14
To promote a closed-loop supply chain for assembled products, disassembly systems are required to recycle End-of-Life (EOL) products. To increase the total recycling rate of products in disassembly systems, it is desirable to keep rather than destroy parts since disassembly costs are increasing. Therefore, a disassembly system design should be considered based on selecting parts for disassembly in order to minimize the recycling cost while maintaining the recycling rate. On the other hand, since the precedence relationships among disassembly tasks also change according to the parts selection, it is required to consider allocation of the tasks in designing a disassembly line. For the disassembly system design, it is also necessary to have disassembled product information such as the recycling rate and profit of each part, disassembly task times and precedence relationships among the disassembly tasks. This study proposes a disassembly system design with environment and economic parts selection, which balances the recycling rate and cost using the Recyclability Evaluation Method (REM) developed by Hitachi, Ltd. The first step is to optimize the environmental and economic parts selection with integer programming, and the second step is line balancing to reduce the number of stations. Next, a design example is shown and discussed by preparing a 3D-CAD model for a computer and a cleaner. Finally, product and line evaluations are carried out by comparing four scenarios; namely 1) all parts disassembled, 2) maximum recycling rate, 3) minimum recycling cost and 4) balance of recycling rate and cost. It is demonstrated that the recycling cost is reduced as a result of maintaining a higher recycling rate and that the number of work stations and the smoothness index are also improved through use of environmental and economic parts selection.