著者

西川 友弘 綿貫 啓一 楓 和憲 村松 慶一 増子 直也

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.86, no.890, pp.20-00034, 2020 (Released:2020-10-25)

参考文献数

46

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This study aims to examine the benefit of visual fatigue evaluation based on prefrontal cortex (PFC) measurement by near infrared spectroscopy (NIRS), and to evaluate fatigue on various colored LED backlit text. In our method, eight adult participants read a LED backlit text 10 minutes in a dark room. Before and after task, subjective fatigue questionnaire “Jikaku-sho shirabe”, subjective visual fatigue questionnaire (SVF), and the critical flicker-fusion frequency (CFF) were measured. The time-course of oxy-Hb in the PFC was measured using a 22-channel NIRS. Heart rate variability (HRV) was measured to access an autonomic nervous system balance. Six types of white LEDs were used for backlighting: general white as a control (W), high color-rendering white (WH), bluish white (WB), reddish white (WR), greenish white (WG), and yellowish white (WY). In our results, correlation analysis suggested that the development of central fatigue is related to deactivated condition in the mPFC, and the development of subjective visual fatigue is related to deactivated condition in the LPFC. In comparison between LED treatments, in WH condition, high subjective central fatigue, CFF decay and LF/HF were revealed, and the PFC inactivated. In WG condition, low subjective central fatigue and CFF decay revealed. Our findings suggested that participants get tired on high color-rendering white LED backlit text, and were less tired in greenish white LED backlit text. Also, NIRS provides benefits in the evaluation of visual fatigue.

著者

高橋 希宙 綿貫 啓一 楓 和憲 村松 慶一

出版者

一般社団法人 日本機械学会

雑誌

設計工学・システム部門講演会講演論文集 2019.29 (ISSN:24243078)

巻号頁・発行日

pp.2403, 2019 (Released:2020-04-25)

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Obesity has become a serious problem worldwide in the modern society with the change of food culture. Obesity would be a cause of many diseases such as hypertension, dyslipidemia and diabetes. Considering obesity, we examined satiety closely related to energy intake. In this study, we focused on the number of chews and chewing frequency, which are factors of satiety, and analyzed the influence on it. In the experiment, we compared satiety, hunger and masticatory muscle activity among the conditions when participants ate the same amount of food under the condition that the number of chews and the chewing frequency were changed. As a result, the datas of the increase rate of satiety and the masticatory muscle activity showed that participants of low weight and normal weight who consumed foods by chewing many times, and participants of obesity who consumed foods with large masticatory muscle activity for each chew could feel fullness earlier. Using this result, people can reduce the energy intake naturally by feeling fullness early in the diet, and it is expected to improve the eating habits of obese people.

著者

棚本 悠太 綿貫 啓一 楓 和憲 村松 慶一

出版者

一般社団法人 日本機械学会

雑誌

年次大会

巻号頁・発行日

vol.2019, 2019

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<p>The purpose of this study is to estimate the condition of second-hand goods from images using machine learning methods. Assuming that the condition evaluation of second-hand goods has a relationship with the damage that exists in them, we proposed and verified a method to estimate the condition of second-hand goods based on information of the damage. In this study, we chose men's dress shoes for condition evaluation and chose four types of damage: wrinkles, worn out of heel, dirt on outsole, dirt on inside as damage considered to be related to condition evaluation. (1)We create a CNN model that determines the presence or absence of damage, and (2) create a classification tree model that evaluates the state of the product from information on the presence or absence of damage and (3)We evaluated the condition of second-hand goods by combining two created models. As a result of verification, it was shown that the proposed method could evaluate the condition of used goods.</p>

著者

綿貫 啓一

出版者

社団法人人工知能学会

雑誌

人工知能学会誌 (ISSN:09128085)

巻号頁・発行日

vol.22, no.4, pp.480-490, 2007-07-01

被引用文献数

9

著者

綿貫 啓一 河本 政人 岡野 洸祐 勝村 和也 加納 拓実 小林 叶昌 間島 優 小石 智也 和食 麻衣 田浦 智裕 土屋 瞳

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

pp.23-00006, (Released:2023-09-27)

参考文献数

33

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There are few studies that have conducted comprehensive verification of the physiological and psychological effects of different textures of chilled confectioneries by means of biometric measurements and subjective evaluation. The effects of confectionery texture are still unclear. Therefore, this study aimed to clarify the effects of different textures on the activity of autonomic nervous system, the brain, and muscles, and emotion by simultaneously measuring changes over time in various biological information and assessing subjective evaluation given by the tasters during consumption of different types of ice cream with monaka shell with varying water content. Participants answered a subjective evaluation questionnaire and rested for 60 s, and then performed the task. The monaka ice cream consisted of 9 blocks, each of which was eaten in 20 s. Afterwards, the participants rested for 60 s and completed a subjective evaluation questionnaire. Near-infrared spectroscopy was used to measure brain activity during eating, electromyography to measure muscle activity, and electrocardiography equipment to analyze heart rate variability. Eating monaka shell with low water content significantly activated cerebral blood flow in the right hemisphere when the first and sixth blocks were eaten. A significant trend was observed in LF/HF, which is considered an index of sympathetic nerve activity. In the mastication force test, the participants chewed significantly more strongly on ice cream with a high water content monaka shell than those with a low water content. During mastication, the participants who consumed ice cream with the low water content shell tended to use slow muscles more than those who consumed ice creams with high water content shell. The questionnaire showed that both the increase in degree of emotions such as surprise and excitement and the decrease in the degree of emotions such as sadness and depression were larger when the participants consumed ice cream with a high water content shell than those with a low water content shell. The results suggest that monaka shells with a low water content induce a more relaxed state and pleasant emotions than those with a high water content.

著者

綿貫 啓一 丸山 一男 大滝 英征

出版者

社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.58, no.546, pp.538-543, 1992

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Recently, the fine positioning system has been used in the mechanical industry, and has required the improvement of positioning accuracy, reduction of positioning time, increase of carrying capacity and so on. However, the existing control method for the positioning stage may cause delay of phase response or residual vibration when disturbance or overweight acts on the system or stage drives at high speed. In order to obtain the optimum control inputs, it is necessary to grasp the dynamic behaviour of the system precisely. First, this paper deals with the transient response of the positioning stage using the linear graph theory reported in the previous papers. The simulated results of transient response of the positioning stage are compared with the experimental ones, and they are found to be in good agreement. Next, a procedure which can reduce the settling time of positioning is proposed by utilizing this method. As a result, this procedure was able to reduce the settling time by 55%, as compared with only proportional control. 本文を読む・探す CiNii PDF他のリンク1図書館所蔵NII論文ID (NAID)110002380194NII書誌ID (NCID)AN00187463本文言語コードJPN資料種別論文NDL雑誌記事ID0162651700NDL記事分類機械の要素・機構学NDL雑誌分類ZN11(科学技術--機械工学・工業)NDL請求記号Z16-1056収録DBNDL NII-ELS書き出しRefer/BibIX形式BibTex形式タブ区切りテキスト (TSV)rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002380194/

著者

綿貫 啓一 楓 和憲 佐藤 勇一 堀尾 健一郎

出版者

Japanese Society for Engineering Education

雑誌

工学教育 (ISSN:13412167)

巻号頁・発行日

vol.59, no.6, pp.6_104-6_111, 2011 (Released:2011-12-06)

参考文献数

8

被引用文献数

2 1

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In this paper, we implement a new style of manufacturing education on the basis of internships with local businesses as well as by using an interactive skills transfer and skill training system. Our system integrates virtual reality (VR) technology and information communications technology (ICT) which were developed at Saitama University. We have created an interactive technology and skills-sharing network linking the knowledge resources and technical resources of our university with the skill resources of local businesses. Our objective is for our students to learn the skills of the local businesses and their business needs and to be able to effectively acquire knowledge and skills for manufacturing. We report our findings from performing practical training that uses specialized knowledge acquired from lectures combined with VR technology with the objective to provide students with more thorough skills. Our undergraduate curriculum provides practical education that links experiments, practical training, and lectures, in mechanical engineering experiments, mechanical engineering seminars, mechanical engineering practical training, and internships.

著者

小野寺 誠 針谷 昌幸 金剛 力 新谷 政樹 何 祺 綿貫 啓一

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.85, no.880, pp.19-00138, 2019 (Released:2019-12-25)

参考文献数

23

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We proposed an advanced mesh generation technique that reuses the proven analysis models by similar sub-part search. The purpose of this research is to reduce interactive mesh improvement work time and to comply with the mesh specifications. It is our feature technique to search sub-parts similar to the archived sub-parts of proven models from new design CAD. In this technique, the similar sub-parts are retrieved from a CAD model described by boundary representation and made correspondence relation surface pairs of a retrieval model (proven model) and a target model (CAD of new design). A similarity score is based on the attributed graphs of a retrieval model and a target model. And, this score is calculated by a geometrical similarity and topological similarity. If there is such search noise, unreusing sub-parts must be canceled by interactive operation. This is an obstacle to automation. Therefore, with the goal of eliminating search noise, we developed a technique to improve the accuracy of similar partial shape retrieval. By quantifying the geometric relationships such as concentric circles and face-to-face distance as similarity, high precision could be realized. It was applied to a door switch cover part of an automobile which is a verification model, and it was confirmed that search noises disappeared.

著者

陳 献平 綿貫 啓一 楓 和憲 大谷 成子

出版者

公益社団法人 日本設計工学会

雑誌

設計工学 (ISSN:09192948)

巻号頁・発行日

pp.2015.2675, (Released:2016-05-19)

参考文献数

17

被引用文献数

1

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The on-screen keyboard is widely used for text input in mobile devices such as smart phones and tablets. However, the screen area of such devices is not sufficiently wide for smooth input and poses a difficulty to users. Therefore, this paper proposes a gesture-based text entry method that is based on the property of Japanese Hiragana-50-phonemic-table with two-step finger gesture sequence. The first step gesture is to specify the row, such as “a ka sa ta na”, and the second is to specify the column, “a i u e o”. This method does not require a predetermined input area and can be used anywhere on the screen surface. We conducted experiments with ten test subjects who were accustomed to conventional flick entry and found that the proposed method was easy to learn. The input speed was estimated to about half the speed of the flick entry method. This can be attributed to the need for one stroke in flick entry based on-screen keyboards, while the proposed method requires two strokes. Further, the entry rate accuracy was observed to be 91.5%. The experimental results show that the proposed method is practically applicable as a new text entry method.

著者

綿貫 啓一 新村 修平 小島 一恭

出版者

一般社団法人日本機械学会

雑誌

埼玉ブロック大会(講演会)講演論文集

巻号頁・発行日

vol.2006, no.2, pp.89-90, 2006-11-10

著者

武藤 雅大 綿貫 啓一

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2010, no.4, pp.29-30, 2010-09-04

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This paper describes education system using augmented reality technology. The system aims to offer useful information for the learner, to support intuitive study, and to improve the efficiency of the in-depth understanding and study. For the purpose the system that synthesizes information that seems to improve study to the image of the reality on real time was developed using augmented reality technology to mechatronics training, and study. Effects of the system were verified by the testee's using the system and being evaluated. It was confirmed that an educational system using the augmented reality technology was effective in intuitive study by the verification outcome.

著者

綿貫 啓一 田中 秀一郎

出版者

一般社団法人日本機械学会

雑誌

日本機械学会関東支部ブロック合同講演会講演論文集

巻号頁・発行日

vol.2003, pp.111-112, 2003-09-05

被引用文献数

1

著者

綿貫 啓一

出版者

一般社団法人日本機械学会

雑誌

年次大会講演資料集

巻号頁・発行日

vol.2004, no.8, pp.211-212, 2004-09-04

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The environment where Japanese industry has been paid with respect is changing tremendously due to the globalization of economics, where Asian countries are undergoing economical and technical development as well as advancing in information technology. With acceleration of manufacturing bases relocating abroad, industrial hollowing out is happening; hence effort to transfer the technology and the design knowledge of machine design in a company is becoming an important subject. For example, in the design of custom casting product, a designer who is lack of casting knowledge may not be able to produce a good design. In order to obtain a good design and manufacturing, it is necessary to equip the designer and manufacturer with a support system related to casting process or so called, knowledge transfer and creation system. This paper proposes a new knowledge transfer and creation system for manufacturing technology; where machine design, which requires added values such as advanced technology, high quality, short delivery time, is taken as an example and both its explicit and tacit knowledge are cooperated by using synchronized multimedia and immersive virtual environment.