著者

安部 晃司 北 恵実 中谷 朋昭 村上 智明 伊藤 暢宏 中嶋 康博

出版者

日本フードシステム学会

雑誌

フードシステム研究 (ISSN:13410296)

巻号頁・発行日

vol.27, no.4, pp.286-291, 2021 (Released:2021-03-25)

参考文献数

11

被引用文献数

1

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In this study, we examined the differences in food preparation efforts and their causes. We used two-step online survey data comprising 50,000 samples with 726 samples in each step. We clustered the data by the degree of effort, obtaining four clusters of individuals—those who enjoyed preparing and expressed concern for every meal, enjoyed preparing dinner, sought to minimize their efforts, and preferred quick meals in all situations. We then measured the food values using the best–worst scaling method and found that attitude differences toward food preparation were well characterized by differences in food values and socioeconomic conditions.

著者

村上 智明 中谷 朋昭 伊藤 暢宏 安部 晃司 北 恵実 中嶋 康博

出版者

日本フードシステム学会

雑誌

フードシステム研究 (ISSN:13410296)

巻号頁・発行日

pp.12, (Released:2021-12-10)

参考文献数

10

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The COVID-19 pandemic is changing our food consumption behavior in many ways. Using the concept of food value, our analysis tried to capture the impact of the pandemic on what we focus on during food purchase. We found two main changes in food value trends. First, the number of people who place priority on price has declined. Second, we found a decrease in the number of people who strongly evaluate foods based on only one value. These changes seem to impact young people more, and the difference in food priorities between the rich and poor is reducing.

著者

吉武 裕 安部 晃 村上 心 梶原 修平 古川 隼人 坂本 竜二郎

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.854, pp.17-00164-17-00164, 2017 (Released:2017-10-25)

参考文献数

9

被引用文献数

1

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This paper deals with the vibration quenching problem of the one-degree-of-freedom system with a limited power supply. This system is forced by centrifugal force of rotating unbalance, and the system is quenched using a Hula-Hoop and a motor to assist the rotation of Hula-Hoop. The entrainment region, the amount of vibration quenching, and the energy consumptions of the system are studied from the approximate analysis using the averaging method, the numerical integration analysis, and the experiment. Following was made clear: (1) When the unbalance is large, the entrainment region of the voltage of the assistant motor is large. On the other hand, when the unbalance is small, the entrainment region becomes narrow. (2) When the unbalance is large, by setting the voltage of the assist motor to a value smaller than the optimum value for vibration control, within the range that satisfies the allowable vibration amplitude level, the increase amount of the energy consumption becomes low. (3) The approximate solutions obtained by the averaging method are in good agreement with those obtained by the numerical integration method, and the characteristics of these results coincide with those of the results obtained by experiment.