著者

永井 正太郎 福本 梨乃 山下 久仁子 岡田 明

出版者

ヒューマンインタフェース学会

雑誌

ヒューマンインタフェース学会論文誌 (ISSN:13447262)

巻号頁・発行日

vol.20, no.4, pp.469-478, 2018-11-25 (Released:2018-11-25)

参考文献数

15

被引用文献数

1

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Touchscreens are common in personal devices as well as in public devices such as ATMs and vending machines, because they are customizable and require less mental and physical load. However, touchscreens are subject to human error and visual overload, because a touchscreen interface doesn’t have haptic clues. Furthermore, the elderly may tend to be more affected by these issues. We conducted the experiment by measuring finger movement and finger contact force while using a touchscreen, to ascertain suitable feedback from haptic clue for both the elderly(62-75 years old) and younger people(20-30years old) . The findings were as follows: The amount of finger movement and finger contact force of elderly participants were significantly more than that of the younger participants (p < 0.01). Increased finger movement was due to tremors and decreased dexterity caused by aging. Increased finger contact force was due to two reasons: first, a response to less haptic feedback than what elderly participants are accustomed to experience, such as in the operation of a mechanical button; second, an attempt to prevent an error in movement due to their tremor. In addition to the physiological measurements, interviews of the participants revealed that the reason for their differences in using ICT devices is not a lack of experience, but physiological issues, such as tremors, decreased sensation in aging. The study further confirmed that touchscreen designs should include larger buttons and text display and a haptic experience that is attuned to strong finger contact force to promote greater usability for elderly users.

著者

山下 久仁子 曽根 良昭 鶴岡 裕子 山本 佳弘

出版者

Japan Society of Physiological Anthropology

雑誌

日本生理人類学会誌 (ISSN:13423215)

巻号頁・発行日

vol.5, no.3, pp.15-22, 2000-08-25 (Released:2017-07-28)

参考文献数

15

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We studied the effects of an additive flavor on human physiological responses accompanied with normal tea ingestion. In this study, we prepared and used a newly devised cup that gives aroma while subjects are drinking tea. As a result, we observed higher relative power value of α waves[α p/(αp+βp)x100, p : power value] of EEG at Pz position when the subjects drink tea with an additive flavor than when normal tea. In addition, the records of HRV and skin blood flow showed that the additive flavor moderated the level of the increase in the hear rate and the activity of sympathetic nervous system accompanied with normal tea ingestion. These results suggest that the additive flavor enhanced the relaxation of normal tea ingestion.

著者

山下 和彦 岡田 明 山下 久仁子 渡辺 一志

出版者

日本健康行動科学会

雑誌

Health and Behavior Sciences (ISSN:13480898)

巻号頁・発行日

vol.17, no.2, pp.53-57, 2019 (Released:2020-03-12)

参考文献数

24

被引用文献数

1

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This study was the examination of the sustained effects of the autonomic nerve response due to the difference in the posture of the supine and the standing after the acupuncture method of the "skin / subcutaneous tissue, exhalation phase, sitting position". The subjects were 11 healthy male college students without medication and smoking habits (age 19.6 ± 1.0 years old, height 172.1 ± 4.1 cm, body weight 70.4 ± 4.3 kg). Cardiac autonomic nerve function was measured by measuring electrocardiogram and analyzing by spectral analysis of heart rate variability. In the evaluation by spectral analysis, the high frequency component HF (0.15 - 0.40 Hz) and the low frequency component LF (0.04 - 0.15 Hz) were measured, and HF component was used as a cardiac parasympathetic function and LF / HF component was used as an index of cardiac sympathetic function. HR and HF components showed no significant change at standing posture with passage of time after the acupuncture stimulation. However, HR and HF components showed significant change at supine posture with passage of time after the acupuncture stimulation, and enhanced the cardiac parasympathetic function. Furthermore, significant increase of LF / HF component was observed between 5 minutes and 25 minutes after the stimulation in the supine position. From these results, it was obvious that the sustained effects of acupuncture stimulation in the enhancement of cardiac parasympathetic function was caused by supine posture. Moreover, it was suggested that this acupuncture method may be enhance both cardiac parasympathetic and sympathetic nerves.

著者

室山 幸太郎 衣畑 加代子 山下 久仁子 室崎 伸二 山本 佳弘 渡辺 裕彦 曾根 良昭

出版者

日本生理人類学会

雑誌

日本生理人類学会誌 (ISSN:13423215)

巻号頁・発行日

vol.10, no.3, pp.93-99, 2005-08-25 (Released:2017-07-28)

参考文献数

23

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Our previous experimental results have shown that a mixture of thiamin, arginine, caffeine and citric acid (TACC) has an enhancement effect on fat metabolism in mice and human. In this study we examined the effect of tea ingestion, which was supplemented with TACC, on energy expenditure during a rest and an exercise period from the viewpoint of fat metabolism (utilization) in healthy subjects. A single-blind, placebo-controlled, crossover study was carried out to compare the energy expenditure after ingestion of TACC-supplemented tea (thiamin, arginine, caffeine, and citric acid; 1.1, 1240, 52, and 540mg, respectively) or control tea on two consecutive days, in 10 healthy male and female subjects (aged 21-27y) in experiment 1. After the tea ingestion, subjects sat on a chair for 30 min followed by treadmill walking (5km/hr) for 30 min. Respiratory quotient (RQ) and oxygen consumption (VO2) were measured during rest and exercise periods. A double-blind, placebo-controlled, crossover study was performed in 14 healthy female subjects (aged 21-22y) in experiment 2, of which study design was the same as that of experiment 1 except for an additional measurement of RQ and VO2 before ingestion of the tea for 30 min in the sitting position. As results, total energy expenditure and fat oxidation were similar between the two cases (ingestion of control tea and TACC-tea) during the rest period after tea ingestion both in experiment 1 and experiment 2. On the contrary, treadmill walking resulted in about three-fold increase in total energy expenditure; however, fat oxidation during the exercise was significantly greater in the case of TACC-tea than in the control tea case in the both experiments. This effect of TACC-supplementation, enhanced fat oxidation and energy expenditure, seemed to be positively proportional to subjects' Body Mass Index.

著者

阪本 清美 坂下 誠司 山下 久仁子 岡田 明

出版者

ヒューマンインタフェース学会

雑誌

ヒューマンインタフェース学会論文誌 (ISSN:13447262)

巻号頁・発行日

vol.19, no.1, pp.119-128, 2017-02-25 (Released:2018-12-10)

参考文献数

11

被引用文献数

1

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We carried out experiments to investigate the relationship between display resolution and physiological and psychological state during the viewing of 4K and 2K content on a 65-inch 4K TV as a comparison between age groups. During viewing tests of 4K scenic content by participants in their 20s and 50s, psychological evaluation scores and NIRS, an index of nervous system activity, were significantly higher during 4K scenic content viewing than for 2K viewing. However, the effect of the display resolution for content comprising video images of fine objects such as food, jewels, watches, glass and fur, was limited compared to that for scenic content between age groups. Our results suggest that content viewing at 4K tends to cause psychological elation and a surge in brain activity, although the effects varied somewhat according to content, and these effects of display resolution on physiological and psychological state were found regardless of age groups.

著者

阪本 清美 浅原 重夫 坂下 誠司 山下 久仁子 岡田 明

出版者

一般社団法人 日本人間工学会

雑誌

日本人間工学会大会講演集 日本人間工学会第53回大会

巻号頁・発行日

pp.368-369, 2012 (Released:2012-10-27)

著者

阪本 清美 青山 昇一 浅原 重夫 山下 久仁子 岡田 明

出版者

一般社団法人映像情報メディア学会

雑誌

映像情報メディア学会技術報告 (ISSN:13426893)

巻号頁・発行日

vol.33, no.8, pp.25-27, 2009-02-12

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本研究では家庭内視聴環境における視距離の違いが視覚疲労に及ぼす影響についての評価実験を2種類のコンテンツを使用して42インチで行った(実験1、実験2)。さらに、ディスプレイサイズの影響を探るため65インチの大型ディスプレイを用いて行った(実験3).これらの結果は、視覚疲労の観点から、適正視距離が165cmから220cmの中間距離に存在し、ディスプレイサイズに依存せず絶対視距離に関係する可能性があることを示唆していた.