研究者詳細 - 中澤　篤志

論文 - 中澤　篤志

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Cross-Action Cross-Subject Skeleton Action Recognition Via Simultaneous Action-Subject Learning With Two-Step Feature Removal 査読

Yu Mitsuzumi, Akisato Kimura, Go Irie, Atsushi Nakazawa

2024 IEEE International Conference on Image Processing (ICIP) 2182 - 2186 2024年10月

Phase Randomization: A data augmentation for domain adaptation in human action recognition 査読

Yu Mitsuzumi, Go Irie, Akisato Kimura, Atsushi Nakazawa

Pattern Recognition 146 110051 - 110051 2024年2月

Touching with Eye Contact and Vocal Greetings Increases the Sense of Security 査読

Miyuki Iwamoto, Atsushi Nakazawa

Human Activity and Behavior Analysis: Advances in Computer Vision and Sensors: Volume 1 1 104 - 119 2024年1月

掲載種別：論文集(書籍)内論文

Touching another person is the most direct way of communicating one’s presence to the other person and is also a means of communication. The act of touching can generate a sense of anxiety and a sense of security, and we hypothesized that there may be differences in the sense of anxiety and sense of security of the touched person depending on the person and the way of touching. Subjective evaluation and physiological index measurements were conducted. In the subjective evaluation, Russell’s circle model was used to measure arousal and discomfort caused by other stimuli such as prior vocalization and eye contact. We also measured skin conductance response (SCR) of skin electrical activity (electro dermal activity (EDA)) in response to trivial tension and arousal and investigated whether the stimulus combination affected SCR. In the subjective evaluation, the discomfort was reduced when the touch was preceded by a vocal greeting, and the arousal and discomfort were reduced when the touch was made in a position visible to the contacted person. In addition, the physiological index measurement showed that the SCR response was reduced when the participants were called before touch. This suggests that not only the act of touch but also the pre-touch behavior is an important indicator of the reduction of anxiety and a sense of security about touch.

DOI： 10.1201/9781003371540-7

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Deep learning-based sperm motility and morphology estimation on stacked color-coded MotionFlow 査読

Sigit Adinugroho, Atsushi Nakazawa

Informatics in Medicine Unlocked 45 2024年1月

掲載種別：研究論文（学術雑誌）

Motility and morphology are crucial factors in determining male fertility. The current gold standard defined by the World Health Organization (WHO) mandates that semen analysis be performed by trained technicians. Despite strict standardization and technical guidelines set by the WHO, variability in semen analysis results remains prevalent owing to human subjectivity. Computer-Aided Sperm Analysis presents a further challenge because of its poor agreement with human analysis. This study aimed to enhance the accuracy of automated semen analysis by introducing a new method for expressing sperm motion and investigating advanced deep neural network architectures to estimate motility and morphology. Initially, we extracted motion information from the VISEM dataset using our novel motion representation technique called MotionFlow, along with shape information. Consequently, motility and morphology neural networks were constructed to exploit transfer learning in other fields to improve performance. These networks ingested motion and shape features and made separate predictions for motility and morphology. The evaluation process utilized a K-Fold cross-validation scheme to determine the mean absolute error (MAE) and maintain objectivity throughout the analysis. The proposed method achieved a greater level of performance than the current methods by attaining MAE of 6.842% and 4.148% for motility and morphology estimation, respectively. The improvement accomplished by this research may pave the way toward a fully automated human sperm quality assessment.

DOI： 10.1016/j.imu.2024.101459

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認知症の人に対するケアコミュニケーション技法の研修を受講した看護学教員のアイコンタクトの特徴査読

OKAMOTO Eri, AOYAGI Hisami, TAKEUCHI Tomiko, NAKAZAWA Atsushi, HONDA Miwako

看護ケアサイエンス学会誌 22 ( 1 ) 2024年

Capturing Contact Surfaces by a Frustrated Total Internal Reflection System Using a Curved Plate for Comparison of the Beginning of Touching Motions by Humanitude Experts and Novices.

Akishige Yuguchi, Mayuki Toyoda, Sung-Gwi Cho, Atsushi Nakazawa, Jun Takamatsu, Koichiro Yoshino, Tsukasa Ogasawara

SMC 679 - 684 2024年

曲面板を用いた赤外線漏れ全反射方式でのユマニチュードの触れ始めの解析のための接触面情報の取得査読

湯口彰, 豊田真行, 趙崇貴, 吉野幸一郎, 高松淳, 中澤篤志, 小笠原司

日本ロボット学会誌 41 ( 10 ) 2023年10月

Behavioural changes in the interaction between child with autism spectrum disorder and mother through the Comprehensive Care Humanitude™ intervention 査読

Miyuki Iwamoto, Atsushi Nakazawa, Miwako Honda, Sakiko Yoshikawa, Toshihiro Kato, Yves Gineste

Proceedings of the Annual Meeting of the Cognitive Science Society 45 ( 45 ) 2023年7月

Behavioral and neural underpinnings of empathic characteristics in a Humanitude-care expert

Wataru Sato, Atsushi Nakazawa, Sakiko Yoshikawa, Takanori Kochiyama, Miwako Honda, Yves Gineste

Frontiers in Medicine 10 2023年5月

掲載種別：研究論文（学術雑誌）出版者・発行元：Frontiers Media SA

Background

Humanitude approaches have shown positive effects in elderly care. However, the behavioral and neural underpinnings of empathic characteristics in Humanitude-care experts remain unknown.

Methods

We investigated the empathic characteristics of a Humanitude-care expert (YG) and those of age-, sex-, and race-matched controls (n = 13). In a behavioral study, we measured subjective valence and arousal ratings and facial electromyography (EMG) of the corrugator supercilii and zygomatic major muscles while participants passively observed dynamic facial expressions associated with anger and happiness and their randomized mosaic patterns. In a functional magnetic resonance imaging (MRI) study, we measured brain activity while participants passively observed the same dynamic facial expressions and mosaics. In a structural MRI study, we acquired structural MRI data and analyzed gray matter volume.

Results

Our behavioral data showed that YG experienced higher subjective arousal and showed stronger facial EMG activity congruent with stimulus facial expressions compared with controls. The functional MRI data demonstrated that YG showed stronger activity in the ventral premotor cortex (PMv; covering the precentral gyrus and inferior frontal gyrus) and posterior middle temporal gyrus in the right hemisphere in response to dynamic facial expressions versus dynamic mosaics compared with controls. The structural MRI data revealed higher regional gray matter volume in the right PMv in YG than in controls.

Conclusion

These results suggest that Humanitude-care experts have behavioral and neural characteristics associated with empathic social interactions.

DOI： 10.3389/fmed.2023.1059203

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Augmented reality-based affective training for improving care communication skill and empathy. 国際誌

Atsushi Nakazawa, Miyuki Iwamoto, Ryo Kurazume, Masato Nunoi, Masaki Kobayashi, Miwako Honda

PloS one 18 ( 7 ) e0288175 2023年

記述言語：英語掲載種別：研究論文（学術雑誌）

It is important for caregivers of people with dementia (PwD) to have good patient communication skills as it has been known to reduce the behavioral and psychological symptoms of dementia (BPSD) of PwD as well as caregiver burnout. However, acquiring such skills often requires one-on-one affective training, which can be costly. In this study, we propose affective training using augmented reality (AR) for supporting the acquisition of such skills. The system uses see-through AR glasses and a nursing training doll to train the user in both practical nursing skills and affective skills such as eye contact and patient communication. The experiment was conducted with 38 nursing students. The participants were assigned to either the Doll group, which only used a doll for training, or the AR group, which used both a doll and the AR system. The results showed that eye contact significantly increased and the face-to-face distance and angle decreased in the AR group, while the Doll group had no significant difference. In addition, the empathy score of the AR group significantly increased after the training. Upon analyzing the correlation between personality and changes of physical skills, we found a significant positive correlation between the improvement rate of eye contact and extraversion in the AR group. These results demonstrated that affective training using AR is effective for improving caregivers' physical skills and their empathy for their patients. We believe that this system will be beneficial not only for dementia caregivers but for anyone looking to improve their general communication skills.

DOI： 10.1371/journal.pone.0288175

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ユマニチュードの触れ始めを再現するロボットハンド

豊田真行, 湯口彰重, 趙崇貴, 佐藤勇起, 高松淳, 中澤篤志, 和田隆広, 小笠原司

ロボティクス・メカトロニクス講演会講演概要集 2023 1A2-C18 2023年

Simulated communication skills training program effects using augmented reality with real‐time feedback: A randomized control study

Masaki Kobayashi, Miyuki Iwamoto, Saki Une, Ryo Kurazume, Atsushi Nakazawa, Miwako Honda

Alzheimer's & Dementia 18 ( S8 ) 2022年12月

掲載種別：研究論文（学術雑誌）出版者・発行元：Wiley

Abstract

Background

While communication with dementia patients is challenging, known educational methods to improve communication skill for medical professionals are lacking. Our study aimed to assess the efficacy of simulated communication skills training for nursing students using augmented reality (AR) with real‐time feedback.

Methods

This is a randomized control study. Twenty‐five nursing students enrolled and learned standardized multimodal comprehensive care communication skills through a self‐learning material, which includes pathophysiology and clinical manifestations of dementia. Subsequently, participants were randomly assigned to one of the two learning systems—AR training or conventional nursing mannequin training. Each group had the training intervention to change the clothes of mannequins for one hour. The mannequin of the AR group was a superimposed computer graphic of an elderly woman’s face which reacted to participants' communication. Further, the communication skills of gaze and voice were evaluated by artificial intelligence (AI) and feedbacked to the participants’ head‐mounted display in real‐time. The conventional training group had the self‐training with nursing mannequins. All participants performed basic nursing care, including changing clothes and bed bath, to simulated patients before and after the training intervention, which were video‐recorded by an eye‐tracking camera and a fixed camera, then the videos were analyzed the communication skills by AI. Additionally, participants' empathy to patients was evaluated by the Jefferson Scale of Empathy‐Health Professions Students Version (JSPE‐HSP). The primary outcome was the proportion of time spent in eye contact during the care to simulated patients. The secondary outcome was the empathy score of JSPE‐HSP.

Results

After the training intervention, the proportion of time spent in eye contact in the AR training group significantly increased than the conventional training group (eye contact 13.6% versus 4.4%, P<0.05). Moreover, the JSPE‐HSP score increased from pre‐training to post‐training in the AR training group, whereas it decreased in the conventional training group [Mean (SD): 9.1 (6.6) versus ‐1.3 (3.8), P<0.01].

Conclusions

The simulated communication skills training for nursing students using augmented reality with real‐time feedback was associated with increased interactive communication skills to simulated patients and the empathy to patients.

DOI： 10.1002/alz.062055

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Editorial: Interaction in robot-assistive elderly care. 国際誌

Hidenobu Sumioka, Jim Torresen, Masahiro Shiomi, Liang-Kung Chen, Atsushi Nakazawa

Frontiers in robotics and AI 9 1020103 - 1020103 2022年

Non-goal-driven eye movement after visual search task

Ayumi Takemoto, Atsushi Nakazawa, Takatsune Kumada

Journal of Eye Movement Research 15 ( 2 ) 2022年

掲載種別：研究論文（学術雑誌）

We investigated the functions and mechanisms of non-goal-driven eye movements, which are defined as eye movements induced when looking at visual stimuli on a display without engaging in a specific task or looking at a display without any visual stimuli or tasks. In our experiment, participants were asked to perform a visual search task on a display, which was followed by a rest period in which stimuli remained on the display or all stimuli were erased. During the rest period, the participants were asked to only look at the displays without engaging in any visual or cognitive tasks. We mainly analyzed the gaze-shift patterns in both task and rest periods, in which eye movements were classified in accordance with the angles of saccade directions in two consecutive saccades. The results indicate a significant difference between goal-driven eye movements, which were observed in the task period, and nongoal-driven eye movements, which were observed in the rest period. Scanning gaze-shift patterns dominated the task period, and backward and corrective-saccade-like gaze-shift patterns dominated the rest period. The gaze-shift pattern was affected by the task-difficulty during the task period. From these findings, we propose a model describing the oculomotor system in terms of goal-driven and non-goal-driven eye movements. In this model, the engagement levels of top-down and bottom-up control change along with task difficulty and are affected by the gaze-shift patterns during a visual search task. Decoupling of top-down control from the oculomotor system during a rest period induces backward saccades, resulting in fixation around the central part of a display. Therefore, we suggest that non-goaldriven eye movements play a crucial role in maintaining the readiness of the oculomotor system for the next search task.

DOI： 10.16910/jemr.15.2.2

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Drowsiness prevention using a social robot.

Koki Hara, Ayumi Takemoto, Atsushi Nakazawa

RO-MAN 603 - 609 2022年

Ethical Considerations in User Modeling and Personalization (ECUMAP): ACM UMAP 2022 Tutorial.

Jim Torresen, Atsushi Nakazawa

UMAP 351 - 353 2022年

Facial expression translations preserving speaking content.

Shiki Takeuchi, Atsushi Nakazawa

26th International Conference on Pattern Recognition(ICPR) 1215 - 1221 2022年

Development of educational system for paramedics specializing to dementia elderlies analyzed by artificial intelligence and its learning effects. 国際誌

Miwako Honda, Saki Une, Yves Gineste, Atsushi Nakazawa

Alzheimer's & dementia : the journal of the Alzheimer's Association 17 Suppl 8 e051576 2021年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: While the number of emergency transfer of dementia elderlies to acute care hospitals has being increasing, paramedics are facing challenges to perform their duties promptly due to difficult communication with patients. OBJECTIVES: To develop the standardized educational system for paramedics specializing to dementia elderlies with the use of artificial intelligence. DESIGN: Single arm, pre-post study. Participants are paramedics in a metropolitan area of Japan. EXPOSURE: The two sessions of standardized multimodal communication training program which contains lecture and workshop were provided twice, 1 month apart. The training consists three parts. 1: Mechanism and clinical manifestations of dementia, 2: Communication skills: face-to-face interaction; mutual gaze, geometric characteristics and duration of eye contact, verbal communication with phonetic elements, and touch interactions. 3: Interaction strategies with dementia elderlies in emergency situation. All participants performed the rescue simulation training before the training and 1 month after the completion of the training, which were video-recorded and analyzed by artificial intelligence (AI). The video was taken by wearable camera with eye-trackers (1st person camera) and fixed camera (3rd person camera). The satisfaction survey of effectiveness on their work and the Jefferson Scale of Empathy for healthcare professionals were also taken. MAIN OUTCOMES: The primary outcome is the change of communication skills in physical position, distance, eye contact with patients, phonetic elements and touch. The system to analyze face-to-face communication; mutual gaze, geometric characteristics and duration of eye contact by AI was developed by our team. Other elements of communications were evaluated manually. Secondary outcome were satisfaction and the empathy to patients. RESULT: 31 paramedics enrolled the study. Prior to the training, 88% had experienced any difficult condition taking care of dementia patients. The video analysis showed significant change of the interactive communication in the direction of approach, eye contacts and duration of mutual gaze. 96.7% considered the training was effective for their daily work and 97.5% of participants recommended this training to a colleague. The score of empathy scale showed no significant change. CONCLUSION: The educational system for paramedics specializing to dementia with the use of artificial intelligence is effective for their work.

DOI： 10.1002/alz.051576

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Image Emotion Recognition Using Visual and Semantic Features Reflecting Emotional and Similar Objects

Takahisa YAMAMOTO, Shiki TAKEUCHI, Atsushi NAKAZAWA

IEICE Transactions on Information and Systems E104.D ( 10 ) 1691 - 1701 2021年10月

Technical Challenges for Smooth Interaction With Seniors With Dementia: Lessons From Humanitude™ 国際誌

Hidenobu Sumioka, Masahiro Shiomi, Miwako Honda, Atsushi Nakazawa

Frontiers in Robotics and AI 8 650906 - 650906 2021年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Due to cognitive and socio-emotional decline and mental diseases, senior citizens, especially people with dementia (PwD), struggle to interact smoothly with their caregivers. Therefore, various care techniques have been proposed to develop good relationships with seniors. Among them, Humanitude is one promising technique that provides caregivers with useful interaction skills to improve their relationships with PwD, from four perspectives: face-to-face interaction, verbal communication, touch interaction, and helping care receivers stand up (physical interaction). Regardless of advances in elderly care techniques, since current social robots interact with seniors in the same manner as they do with younger adults, they lack several important functions. For example, Humanitude emphasizes the importance of interaction at a relatively intimate distance to facilitate communication with seniors. Unfortunately, few studies have developed an interaction model for clinical care communication. In this paper, we discuss the current challenges to develop a social robot that can smoothly interact with PwDs and overview the interaction skills used in Humanitude as well as the existing technologies.

DOI： 10.3389/frobt.2021.650906

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