寺内 文雄

This research deals with the matter of subjective or psychological lifetime of products. Most scholar works concerning such a matter have considered user-product attachment as the only means being effective for extending the subjective lifetime of products. Aiming to analytically expand this means and/or to find out the other possible effective means in this regard, here, we have conducted a comparative and analytical study on the evolution of users? Kansei toward a short-lived and long-lived product during the entire lifecycles of those two kinds of product. As Kansei in its professional definition embraces all subjective issues of product, this research is based on Kansei Engineering approach. In this research, the product lifecycle from user perspective is divided into three different stages including purchasing/choosing, keeping/using and replacing/throwing away the product. Mobile phone, private passenger car and handicraft or Japanese traditional furniture are assigned respectively as the short-lived and long-lived products for investigation. Three groups of Japanese subjects, as the user or owner of these three kinds of product, are investigated and the changes of their Kansei toward their products are analyzed. The outcome of this analysis will be the Kansei factors associating with the investigated groups of subjects' rationale when purchasing, keeping/using and replacing their short/long-lived products. Finally, the extracted patterns and trends of the Kansei evolution of those three groups regarding their short/long-lived products during the lifecycle stages of those products are compared.

楽器を演奏する際，演奏者はその楽器を楽しむ上で音色や音の響きなど以外に演奏時の動きも重要な因子であると考えられる。また近年センシング技術が楽器への応用されていることからその需要はますます高まっていると感じる。そこで本研究では演奏時の動きを抽出すること，抽出された動作から新しい楽器を提案することを目的とした。

児童が手に触れる食器は単に食べ物を盛る道具というだけでなく、食欲や食に対する意識を変えるきっかけになるものと考えられる。その一方で食事に適した食器を使うことができない現実がある。そこで本研究では、食への関心を持たせることを目的とする学校給食用食器の提案を行う。学校給食の現状について文献調査と現場の栄養士への聞き取り調査を行い、給食における問題点と給食用食器に必要な要素を抽出した。これにより、食器自体の改善とともに食器の使用方法を考える必要性が示唆された。そこで日本食を基本とし、飯碗、汁碗、箸を用い食が豊かにならないかと考えた。次にどのような食器が好まれるのかを明確にするため、児童17名を対象に実験を行った。検証の結果、重要な要素は「深さのある碗はおいしそうに感じられない」「持ちやすさが好きな碗を決める大きな要素のひとつ」であること明らかになった。その後試作モデルを使用し児童の手の寸法に合った碗の大きさを明らかとした。

In this paper, it aimed to pay attention to the clicking sound that was one of the unpleasant sounds of mouse and to solve the noise problem. Therefore, the silent mouse using the silicone switch was produced, and the possibilities of feedbacks other than the clicking sound were examined. As a result, it was clarified to obtain a satisfied operational feeling by "Vibration to the tip of a finger" even when the clicking sound was lost; it was confirmed that this satisfaction rating was equal to the existing product with the clicking sound. This result indicates the possibility that the mouse using the silicone switch solves the noise problem in daily life.

This paper aimed to construct a database of needs of the visually impaired during cooking. First, it was extracted needs of the visually impaired during cooking by observational research. Four visual impaired persons were participated in the experiments. As the result, it was revealed that their needs were classified into three main groups. Finally, a database of the needs was constructed. The features of the database were able to search by action, and to check image of the users during cooking.

The purpose of this study was to propose tactile indicators for drink containers. It was carried out a questionnaire survey to determine the needs for tactile indicators of drink containers. Subsequently, two kinds of experiments were carried out to clarify the relationships between tactile indicators and types of drink. Twenty five visually impaired persons were participated in the experiment. As the result, it was clarified those relationships. Finally, it was confirmed the validity of the proposed tactile indicators in verification experiment.

The purpose of this study is to elucidate the factor that a person comes to feel good from the viewpoint of action and tool systematically. At first, by interview investigation, we collected opinions about the action that came to feel good. As the results of statistical analysis, it could be classified that actions to make feelings better in six groups : creation, improvement, nature, exercise, intake and rest.. In addition, we discussed relations between feelings and tools with structural models.

A chair that would change the form according to the posture of users who seat in the chair was developed in order to give the users two suitable seating postures: for working and for resting or thinking. The chair consists of mainly steel frames and nets, and the nets are composed by some different kind materials so that the users would touch the most suitable material at each seating posture. The height and angle of the seat and the materials as well as the form and function were investigated to realize the most comfortable seating. Finally, a real chair was proposed and it was examined to confirm the possibility to be a product.

Human may feel not only discomfort but also comfort in vibration. Some people who have some physical types or preferences for dynamical stimuli would feel good or 'pleasure' to the vibration. Although many investigations into human body vibration have been carried out, there have been little researches that directly tackling the 'pleasure'. The object of the study is to make the vibration inducing to feel the pleasure clear from the viewpoints of physiology, psychology and physics. A vibration experiment was implemented to the subjects who sit in an automobile seat in a dynamical condition in vertical vibration. As a result, there were a passive pleasure and an active pleasure which would be induced in the dynamical condition.

従来の振動・揺動研究は、人体に及ぼす不快な影響の生理的・主観的評価やその予測に興味が置かれている。そのために、それらの研究のほとんどは振動・揺動をいかに軽減できるかに着目した研究に特化することになり、振動自体を低減することが目標となっていた。これに対して、振動・揺動を積極的に活用する方向で研究を行っている例はほとんど見当たらないのが現状である。振動・揺動は人にとって不快感を与えるだけでなく、特定のそれは快感情を誘発する。そこで本研究においては、振動および揺動を「快」の視点から取り扱い、快感情を誘発する振動・揺動を生理・心理・物理の三指標から解明することをその目的とした。結果として，自発的揺動刺激実験により、血圧がその評価において有効な指標の一つであることが示唆された。また上下振動刺激実験から、ヒトは振動により消極的快と積極的快が誘発されることが明らかになり、その評価には血圧が有効な指標であることが示唆された。