論文 - 南澤　孝太

How Haptics Induce Social Behavior: An Exploratory Study of Public Goods Games with Tactile Sharing on the Internet Using a Behavioral Economics Approach

Takeuchi D., Inukai K., Suyama M., Manabe N., Tanichi T., Tanaka Y., Watanabe J., Murata A., Minamizawa K.

IEEE Haptics Symposium, HAPTICS 2022-March 2022年

ISSN  23247347

　概要を見る

By integrating haptic presentation technology and certain haptic sensors into online real-time communication, we can acquire subjective information on others through the sense of touch, and use it as a new standard for our own behavior. We believe that this will lead to changes in people's altruistic behavior, including cooperative behavior. This study investigates behavioral changes during tactile sharing using a behavioral economics scheme. We adopted a sequential public goods game where several participants in a group must exchange money. The haptic condition, where the investment points that other player put can be recognized with vibrotactile sense, and the visual condition, where the investment points that other player put can be visually recognized, were prepared. 32 participants were divided into the visual-first and haptic-first groups, and the haptic or visual condition was alternated between the 1st and 2nd sessions. The results showed significant effects on the haptic experience and correlations with guilty, indicating that the tactile sharing amplified feelings of guilt and made people less likely to act uncooperatively.

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Furekit: Wearable Tactile Music Toolkit for Children with ASD

Qi D., Shibasaki M., Kamiyama Y., Tanaka S., Kawasaki B., Mitsuhashi C., Pai Y.S., Minamizawa K.

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 13235 LNCS   310 - 318 2022年

ISSN  03029743

　概要を見る

Children with autism spectrum disorder (ASD) face the challenge of social interaction and communication, leading to them often requiring significant support from others in their daily lives. This includes challenges like basic communication to convey their emotions to comprehension in early education. To aid with their early development, we propose Furekit, a wearable toolkit that encourages physical interaction via audio and tactile stimuli. Furekit can be attached to various parts of the body, can be operated wirelessly, and is equipped with both a speaker and a vibrotactile actuator. The audio and tactile stimuli are triggered when touched via a conductive pad on the surface, aiming to aid these children’s learning and social experience. From our conducted workshop with children with ASD, we found that Furekit was well-received and was able to encourage their spontaneous physical movement. In the workshop, Furekit shows its potential as an educational and communication tool for children with ASD.

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Intersubjective Tactile Sharing Method Based on Human Skin Vibration Characteristics

Kitamichi K., Yukawa H., Minamizawa K., Tanaka Y.

Conference Proceedings - IEEE International Conference on Systems, Man and Cybernetics 2022-October   299 - 304 2022年

ISSN  1062922X

　概要を見る

Tactile sensation is essential for recognizing mechanical interactions between the human body and its environment; it is generally uniquely experienced by individuals. Haptic sharing technologies enable to share of other person's (or robot's) tactile sensations, and it is expected to apply for skill learning, collaborative work, and robot operation. While wearable tactile sensors are useful for tactile measurements, they are affected by differences in physical characteristics between individuals. Therefore, to accurately convey the tactile information felt by others and utilize it for work, it is necessary to remove individual differences due to differences in individual physical characteristics. In this study, based on the frequency based intensity of skin vibration of an individual, the vibration detected by the acceleration sensor affixed to the fingertip was modulated to remove individual differences. To confirm the effectiveness of the proposed method, we investigated both physical and perceptual similarities for skin vibrations collected from three persons with three different fine textures. The results showed that vibrations individually modulated with the proposed method was similar in the intensity and power spectrum density than those using the uniform modulation function, and was perceived similar when presenting those with a vibrator.

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Investigating the Relation Between Gender Expression of Mixed Reality Avatars and Sexuality of Male Users

Kundu A., Pai Y.S., Minamizawa K.

Proceedings - 2022 IEEE International Symposium on Mixed and Augmented Reality Adjunct, ISMAR-Adjunct 2022    881 - 884 2022年

ISSN  2771-1102

　概要を見る

Mixed reality environments are the next step in remote collaboration, yet there has been little attention towards avatar design for the en-joyability and efficiency of diverse users, particularly for the lesbian, gay, bisexual, transgender and queer (LGBTQ+) community. We believe that it is important to adapt the design of virtual avatars users collaborate with depending on not only the users gender but also their sexuality. In this study, we focus on examining the relationship between the sexual orientation of male users with the gender expression of virtual avatars, while they perform a collaborative task in mixed reality. We analyzed the perception of straight cisgender men and gay cisgender men in relation to the gender expression of the above mentioned agents and find differences that might affect design decisions for creating user-base specific avatars. We found that Female avatars tend to have a more positive perception when it comes to gay men. And for mixed reality, gay men also tend to have both negative and positive experiences more intensely than straight men.

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ARMixer: Live Stage Monitor Mixing through Gestural Interaction in Augmented Reality

Huang W., Bourgeois S., Pai Y.S., Minamizawa K.

Proceedings - SIGGRAPH Asia 2021 Posters, SA 2021 2021年12月

　概要を見る

Existing stage monitor mixing systems are inefficient and cannot accommodate the communication between the musicians and sound engineers. We introduce ARMixer, which allows musicians to perform self-stage monitor mixing through gestures in augmented reality to provide an intuitive mixing experience. We performed two usability tests and found that ARMixer is acceptable to the user and has excellent psychoacoustic intuitiveness in terms of mixing parameter controls by gestures and identifying mixing target.

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Dementia Eyes: Perceiving Dementia with Augmented Reality

Shen X., Pai Y.S., Kiuchi D., Oishi K., Bao K., Aoki T., Minamizawa K.

Proceedings - SIGGRAPH Asia 2021 XR, SA 2021 2021年12月

　概要を見る

Dementia is a global health crisis, of which there is a need to understand the patients' perception towards improving their quality of life. We propose Dementia Eyes, a mobile AR experience that simulates common visual symptoms of senile dementia based on the known pathology and caregivers' actual experience with patients. Leveraging an iPhone and a Head-Mounted Display (HMD), we developed a real-time application which allows users to see the world from the perspective of an Alzheimer's type of dementia (AD) patient. The experience was validated by professional medical workers in Japan, and the result advocates for the efficacy of the empathy we intended to bring to them.

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Collaborative Avatar Platform for Collective Human Expertise

Hagiwara T., Katagiri T., Yukawa H., Ogura I., Tanada R., Nishimura T., Tanaka Y., Minamizawa K.

Proceedings - SIGGRAPH Asia 2021 Emerging Technologies, SA 2021 2021年12月

　概要を見る

In this study, we developed a system in which two users are integrated into one actual robot arm to collaborate with each other. The method of dividing the roles allows flexible movements that is not dependent on the range of movement and rotational freedom of the human arm, and enables movements that are impossible for a single person. The mixing of movements in adjustable ratio allows an expert to support a beginner to make more stable movements, and induces collaboration between users with different perspectives. Additionally, we implement tactile feedback to enable interaction between users and between users and the robot. We investigate the effects of these on usability and cognitive behavior. This system is expected to become a new method of collaboration in the cyber-physical society.

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BridgedReality: A Toolkit Connecting Physical and Virtual Spaces through Live Holographic Point Cloud Interaction

Armstrong M., Quest L., Pai Y.S., Kunze K., Minamizawa K.

Proceedings - SIGGRAPH Asia 2021 Posters, SA 2021 2021年12月

　概要を見る

The recent emergence of point cloud streaming technologies has spawned new ways to digitally perceive and manipulate live data of users and spaces. The graphical rendering limitations prevent state-of-the-art interaction techniques from achieving segmented bare-body user input to manipulate live point cloud data. We propose BridgedReality, a toolkit that enables users to produce localized virtual effects in live scenes, without the need for an HMD nor any wearable devices or virtual controllers. Our method uses body tracking and an illusory rendering technique to achieve large scale, depth-based, real time interaction with multiple light field projection display interfaces. This toolkit circumvented time-consuming 3D object classification, and packaged multiple proximity effects in a format understandable by middle schoolers. Our work can offer a foundation for multidirectional holographic interfaces, GPU simulated interactions, teleconferencing and gaming activities, as well as live cinematic quality exhibitions.

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Parallel Ping-Pong: Demonstrating Parallel Interaction through Multiple Bodies by a Single User

Takada K., Kawaguchi M., Nakanishi Y., Uehara A., Armstrong M., Verhulst A., Minamizawa K., Kasahara S.

Proceedings - SIGGRAPH Asia 2021 Emerging Technologies, SA 2021 2021年12月

　概要を見る

We explore a "Parallel Interaction", where a user controls several bodies concurrently. To demonstrate this type of interaction we developed "Parallel Ping-Pong". The user plays ping-pong by controlling 2 robot arms with a Virtual Reality (VR) controller, and while looking from the viewpoint of one of the 2 robot arms with a Head Mounted Display (HMD). The HMD view switches between the 2 robot arms' viewpoints according to the ping-pong ball position and direction. To keep the sense of agency over the robot arms (hindered by the system latency), the robot arms calculate the balls' paths and position themselves to hit the balls back; all while integrating the controller motion. Throughout this demonstration, we investigate a real-life design of Parallel Interaction with multiple bodies by a single user.

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Bilaterally shared haptic perception for human-robot collaboration in grasping operation

Tanaka Y., Shiraki S., Katayama K., Minamizawa K., Prattichizzo D.

Journal of Robotics and Mechatronics （Journal of Robotics and Mechatronics）  33 （ 5 ） 1104 - 1116 2021年10月

ISSN  09153942

　概要を見る

Tactile sensations are crucial for achieving precise operations. A haptic connection between a human operator and a robot has the potential to promote smooth human-robot collaboration (HRC). In this study, we assemble a bilaterally shared haptic system for grasping operations, such as both hands of humans using a bottle cap-opening task. A robot arm controls the grasping force according to the tactile information from the human that opens the cap with a fingerattached acceleration sensor. Then, the grasping force of the robot arm is fed back to the human using a wearable squeezing display. Three experiments are conducted: measurement of the just noticeable difference in the tactile display, a collaborative task with different bottles under two conditions, with and without tactile feedback, including psychological evaluations using a questionnaire, and a collaborative task under an explicit strategy. The results obtained showed that the tactile feedback provided the confidence that the cooperative robot was adjusting its action and improved the stability of the task with the explicit strategy. The results indicate the effectiveness of the tactile feedback and the requirement for an explicit strategy of operators, providing insight into the design of an HRC with bilaterally shared haptic perception.

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Wearable Haptics for Object Compliance Discrimination through Passive Touch

D'Aurizio N., Baldi T.L., Villani A., Minamizawa K., Tanaka Y., Prattichizzo D.

2021 IEEE World Haptics Conference, WHC 2021    894 - 899 2021年07月

　概要を見る

The ability to estimate compliance is an important human skill related to the tactile sense. When the perception of compliance is mediated by haptic devices, the interaction with objects usually takes place through active exploration from the subject. In this paper, we present a wearable haptic device for transmitting information about object compliance through passive touch, meaning that stimuli are generated by an external agent rather than by user motion. More precisely, the dynamics describing the object indentation is reproduced on the user's forearm in the form of decoupled cues representing applied force and surface displacement. The development of such a device has a twofold purpose. Firstly, it allows the study of the human capacity for processing decoupled information to deduce object compliance. Secondly, it makes possible to convey object compliance to someone who is not performing the object indentation. This is especially important in contexts like telemedicine and human-robot collaboration.Users' perception of stiffness, force, and displacement were estimated. Then, a two-phase experiment was carried out to compare the proposed approach with the state of the art. Results of the experimental campaign revealed the effectiveness of the proposed approach. Users were able to discriminate and order objects with different compliance with a success rate 9% greater than the one obtained exploiting state of the art strategies reproducing only forces.

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Comado: Communication System for Ambient Connection between Distance Locations

Yamamura F., Tanichi T., Pai Y.S., Minamizawa K.

2021 IEEE World Haptics Conference, WHC 2021    588 - 588 2021年07月

　概要を見る

Current video call systems can facilitate formal conversation, yet they lack the ability to provide users with an informal sense of presence. To this end, we propose Comado, a communication system that creates an ambient connection using online interactive haptic sharing. Outside of face-to-face communication, Comado provides haptic feedback to the desk to convey a sense of presence. From preliminary results, we plan to further improve the design of Comado to be deployed in the wild.

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Tactile Music Toolkit: Supporting Communication for Autistic Children with Audio Feedback

Qi D., Hynds D., Shibasaki M., Pai Y.S., Minamizawa K.

2021 IEEE World Haptics Conference, WHC 2021 2021年07月

　概要を見る

We propose the Tactile Music Toolkit, a wearable device that delivers audio feedback to aid in communication and interaction for autistic children. The toolkit is wireless and is packaged into a compact module to promote more physical interaction among autistic children which can aid in their communication and social development. Our preliminary observations showed that our toolkit was fun to use and it helped them in their willingness to engage in physical contact.

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Identification of an Alternative Glycyrrhizin Metabolite Causing Liquorice-Induced Pseudohyperaldosteronism and the Development of ELISA System to Detect the Predictive Biomarker

Ishiuchi, K; Morinaga, O; Yoshino, T; Mitamura, M; Hirasawa, A; Maki, Y; Tashita, Y; Kondo, T; Ogawa, K; Lian, FY; Ogawa-Ochiai, K; Minamizawa, K; Namiki, T; Mimura, M; Watanabe, K; Makino, T

FRONTIERS IN PHARMACOLOGY 12 2021年05月

ISSN  1663-9812

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Haptic Empathy: Conveying Emotional Meaning through Vibrotactile Feedback

Ju Y., Zheng D., Hynds D., Chernyshov G., Kunze K., Minamizawa K.

Conference on Human Factors in Computing Systems - Proceedings （Conference on Human Factors in Computing Systems - Proceedings）  2021年05月

ISSN  9781450380959

　概要を見る

Touch plays an essential role in communicating emotions and intensifying interpersonal communication[4]. A lot of research focuses on how to create or improve haptic interfaces looking into challenges and possibilities that the haptic technology can offer[30]. The objective of this research is to investigate whether people can share subjective feelings through simple vibrotactile feedback. In an initial experiment, we used the TECHTILE toolkit[19] to record 28 vibration sample sets for 4 different emotions (joy, anger, sadness, relaxation). We then replayed the vibrations to test how well they could be recognized. The results support the hypothesis that people can use vibration feedback as a medium for expressing specific subjective feelings. It also indicates some universalities in affective vibrotactile stimuli that even strangers with little to no knowledge about the senders could recognize the emotional meanings.

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Research on the transcendence of bodily differences, using sport and human augmentation medium

Ando R., Uebayashi I., Sato H., Ohbayashi H., Katagiri S., Hayakawa S., Minamizawa K.

ACM International Conference Proceeding Series    31 - 39 2021年02月

　概要を見る

In this study, we created a sport which applied with human augmentation technology, that is not affected by the differences in the participants' lower limbs, using a wheelchair-type body-enhancing medium that provides a new motor ability called drifting that was not possible before. The sport was played by six players, three people with non lower limb disabilities and three without lower limb disabilities, and the results showed a change in the added ability especially for their motions' accuracy. Some of these were not related to the differential status of the lower limb, while others may have been.

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Boiling Mind: Amplifying the Audience-Performer Connection through Sonification and Visualization of Heart and Electrodermal Activities

Sugawa M., Furukawa T., Chernyshov G., Hynds D., Han J., Padovani M., Zheng D., Marky K., Kunze K., Minamizawa K.

TEI 2021 - Proceedings of the 15th International Conference on Tangible, Embedded, and Embodied Interaction （TEI 2021 - Proceedings of the 15th International Conference on Tangible, Embedded, and Embodied Interaction）  2021年02月

ISSN  9781450382137

　概要を見る

In stage performances, an invisible wall in front of the stage often weakens the connections between the audience and performers. To amplify this performative connection, we present the concept "Boiling Mind". Our design concept is based on streaming sensor data related to heart and electrodermal activities from audience members and integrating this data into staging elements, such as visual projections, music, and lighting. Thus, the internal states of the audience directly influence the staging. Artists can have a more direct perception of the inner reactions of audience members and can create physical expressions in response to them. In this paper, we present the wearable sensing system as well as design considerations of mapping heart and electrodermal activity to changes in the staging elements. We evaluated our design and setup over three live performances.

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ハプティクスをデザインする

南澤 孝太

電気学会誌 （一般社団法人 電気学会）  141 （ 2 ） 83 - 85 2021年

ISSN  1340-5551

　概要を見る

<p>1．はじめに</p><p>本特集において紹介されてきたように，ハプティクスの計測提示技術の進化は目覚ましく，さまざまな応用領域に適したインタフェースの設計開発が可能になってきている。一方で，これらの技術が今後社会に普及し人々の日常に浸透するためには，ハプティクスが利用者に対して具体</p>

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Remote control system

YS MHD, T Sasaki, R MATSUMURA, K MINAMIZAWA, M Inami

US Patent App. 17/137,116 2021年

Information processing device, information processing method, and program

T Nashida, M Mikami, K Minamizawa, M Inami, T Kurogi, M Takeda, ...

US Patent App. 17/040,508 2021年