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( Junya Yano ),( Tatsuki Aoki ),( Kazuo Nakamura ),( Kazuo Yamada ),( Shin-ichi Sakai ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 3RINCs초록집 Vol.2015 No.-
Hydrogenated biodiesel (HBD) is envisaged as a new type of diesel. Some byproducts of the HBD production process could also replace fossil fuels; therefore, increasing these substitution amounts could contribute to reducing the burden on the environment. The purpose of this study was to clarify the reduction of the environmental burden brought about by combining the HBD production from waste cooking oil with the anaerobic digestion (AD) of food waste. A life cycle assessment (LCA) was conducted, in which a combined functional unit was established, which included “the treatment of the household waste and the waste cooking oil annually generated in Kyoto city” and “running a diesel vehicle for household waste collection.” The base scenario was that all household waste and waste cooking oil were incinerated. The results indicated that compared with the base scenario, utilizing the combined HBD production system and the AD of food waste could bring about a reduction of 41.8% in the integrated environmental effects (global warming, fossil fuel consumption, acidification, and urban air pollution). The reduction of greenhouse gases compared with the base scenario was 18,100 t-CO<sub>2</sub>eq/yr. Substitutions with the byproducts of the HBD production process could reduce greenhouse gas emissions by 1,070 t-CO<sub>2</sub>eq/yr.
Junya HIJIOKA,Hazime SHIRAISHI,Toru WATANABE,Kazuto SETO 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.춘계 No.-
This paper deals with control system design for active isolation table. If elastic loads are put on the isolation table, vibration modes of the table are changed. Therefore, the controllers for the active isolation table should be designed taking account of elastic loads. According to this fact, a dynamical model must be identified that takes the dynamics of elastic loads into consideration for such controllers. In this research, an experimental active isolation table with an elastic load is built. Its dynamical model is identified by using experimental modal analysis or FEM analysis. A controller is designed by using the model according to sub-optimal control theory, absolute velocity feed-back control theory and feed-forward control theory. Property of the obtained controller is qualified through computer simulations and control experiments.
A Case-based Design Framework for Screen Transition Diagram of Web Application
Junya Shimada,Taiki Enomoto,Susumu Takeuchi,Masanori Akiyoshi,Norihisa Komoda 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
Web applications are widely used on the Internet and Intranets. They are easy to be provided because a provider does not have to deploy them to each client. Accordingly, screen transition diagram (STD) is used to analyze the requirements of Web applications quickly. STD is useful to grasp the outline of the whole application, but analysts in most cases draw the diagrams from the scratch, even if they contain similar functionalities. This paper addresses a case-based design framework for supporting to draw STD of Web applications. In this framework, the analysts would combine different parts of STD over multiple Web applications, by dividing STDs into Web Page Transition Groups (WPTGs) based on the exchanged data among the screens. Moreover, a search support method to find appropriate WPTGs is considered in the framework.
Layered double hydroxides/oxidized carbon nanotube nanocomposites for CO2 capture
Junya Wang,Liang Huang,Qianwen Zheng,Yaqian Qiao,Qiang Wang 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
A systematic investigation on the influence of synthesis method and chemical composition of LDH/oxidized carbon nanotube (LDH/OCNT) nanocomposites on their CO2 capture performance wereperformed. Three LDH/OCNT nanocomposites were prepared using two methods: ‘‘electrostatic selfassembly’’and ‘‘direct co-precipitation’’. All LDH/OCNT nanocomposites were thoroughly characterized. The isothermal CO2 adsorption at different temperatures (60–400 8C) and adsorption/desorption cyclingtests were conducted. Both the CO2 adsorption capacity and the multi-cycle stability of LDH derivedadsorbents were improved by the introduction of OCNT. In particular, the absolute CO2 capture capacityof Mg-Al-NO3 LDH was increased by more than twice by adding 9.1 wt% OCNT.
Consumption and disposal behaviors of primary and secondary batteries from households
( Junya Yano ) 한국폐기물자원순환학회 2022 ISSE 초록집 Vol.2022 No.-
Batteries are one of the indispensable products in our society. Among 4.4 billion of batteries sold in Japan as of 2019, secondary ((rechargeable) battery battery accounted for 64%. In recent years, it was reported that ignition and fire accidents caused by lithium-ion batteries during waste collection, intermediate treatment, and waste treatment processes has been increased. Considering countermeasures, understanding investigate actual consumption, usage, and disposal behaviors by the consumers is important. Therefore, an internet questionnaire survey (valid respondents: 3,973) was conducted to clarify the actual status of primary (disposable) and secondary battery from households. This survey was used to estimate the inflow, stock, and discharge of small household batteries, as well as to clarify behaviors and attitudes related to the purchase and discharge of primary and secondary batteries. As results, it was found that the highest response rate for both reasons for purchasing and not purchasing secondary battery was for economic aspects (long-term economic benefits and high initial cost), indicating the importance of recognizing correct information on economic efficiency. Number of batteries annually purchased and disposed from households were estimated to be 5.96 and 4.67 per capita, respectively. As domestic stocks, number of batteries unused, in used, and stocked after usage, were estimated to be 4.96, 5.11, and 2.01 per capita, respectively. Among the batteries disposed, secondary battery accounted for 7.2%. However, secondary batteries accounted for 22% of batteries in use. The proportion of secondar batteries disposed will likely increase in the future. It was also found that only 57% and 44% of respondents in Kyoto city disposed primary and secondary batteries properly in accordance with the guidance by the municipality. Therefore, further dissemination of correct sorting methods is needed.