研究者詳細 - 和田　親宗

論文 - 和田　親宗

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杖型計測装置による日常動作の識別方法の提案

黄贇初,西迫善希,北川広大,森藤達雄,國生直也,藤本隆,土谷圭央,泉博之,田中孝之,和田親宗

2019年日本生体医工学会九州支部学術講演会 1A4 2019年03月

Neural Network Model for Electromagnetic Position Tracker Recalibration 査読有り国際誌

Ibai Gorordo Fernandez,Chikamune Wada

2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS 2019) CD-091 2019年02月

A study of hand-movement gestures to substitute for mouse-cursor placement using an inertial sensor 査読有り国際誌

Widodo R., Quita R., Setiawan R., Wada C.

Journal of Sensors and Sensor Systems 8 ( 1 ) 95 - 104 2019年02月

記述言語：英語掲載種別：研究論文（学術雑誌）

© Author(s) 2019. This paper examines the new study of hand orientation as a substitute for computer-mouse movement and is evaluated based on ISO/TS 9241 part 411: Ergonomics of human-system interaction-evaluation methods for the design of physical input devices. Two pairs of hand-orientation candidates were evaluated, using, for example, pitch-roll and pitch-yaw to substitute for up-down and left-right mouse-cursor movements. The up-down cursor movement was generated from the pitch orientation, while the left-right cursor movement was generated from the roll or yaw orientation, depending on the evaluation of the proposed gesture. The research employed a standard computer mouse as a baseline comparison for the study. The empirical study was conducted to evaluate quantitative performance such as throughput and movement time. The best impression resulted when the throughput had the greatest value as well as the shortest movement time. The performance test was based on Fitts's law using a multi-directional tapping test as suggested by ISO/TS 9241-411. The test was divided into several levels of difficulty, including high, medium, low, and very low. The other assessment is qualitative and was performed using the comfort-rating scale questionnaire and rating of perceived exertion of comfortability and fatigue. The quantitative results show that pitch-yaw throughput is slightly higher than for the pitch-roll gesture, and that the movement time in pitch-yaw is slightly less than in pitch-roll, although there is no statistically significant difference between the two. We also found that pitch-yaw movements have a higher level of comfort based on the comfort-rating scale test. Since the test was divided into levels of difficulty, we identified those gestures suitable for the task with a low and very low level of difficulty based on throughput, movement time, and error-rate results. Finally, this study suggests that pitch-roll and pitch-yaw movements of the hand can be used as substitutes for the mouse, and that pitch-yaw movements are superior in regard to causing less fatigue than pitch-roll movements. Furthermore, this study provides a new suggestion for a suitable level of difficulty when using an inertial sensor as an emulator for the movement of a mouse cursor in the field of human-computer interaction.

DOI： 10.5194/jsss-8-95-2019

Scopus

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Evaluation of upper limb muscle load in lower-limb amputees during ladder climbing 査読有り国際誌

Kisuke Iwasaki, Gen Okuya, Yoshiki Nishisako, Naoki Chijiwa, Hisashi Arizono, Chikamune Wada,

International Journal of New Technology and Research 5 ( 1 ) 33 - 39 2019年02月

Static Obstacle Detection along the Road with a Combined Method 査読有り国際誌

Tangsuksant W., Wada C.

BMEiCON 2018 - 11th Biomedical Engineering International Conference 2019年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEE. A smart phone application capable of recognizing numbers of oncoming buses would be of great assistance to blind individuals. To facilitate bus route number reading, obstacles along the road should first be identified. This paper is concerned with identification of static obstacles comprising two processes: the first process involves road area detection and is addressed by applying a rotational invariant of the uniform local binary pattern via k-means clustering. Furthermore, an artificial neural network is employed to select a group of k-means that contains the road area. Next, the straight lines on the road are detected via Hough line transformation. Finally, the line selection step is used to define the road area boundary. The second process involves static obstacle detection and is addressed through segmentation, vertical projection of the road area boundary, and consideration of the vertically projected signal. The experimental results demonstrate a high performance of the proposed method with an F-measure of 0.912.

DOI： 10.1109/BMEiCON.2018.8609985

Scopus

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Effect of age on heart rate responses and subjective mental workload during mental tasks 査読有り国際誌

Kuraoka H., Kurosaka C., Wada C., Miyake S.

Advances in Intelligent Systems and Computing 827 316 - 321 2019年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

© Springer Nature Switzerland AG 2019. We investigated the effect of age on heart rate (HR) responses and subjective mental workload during mental tasks. In this study, 55 male participants performed a mental arithmetic (MA) task and a mirror tracing (MT) task for 5 min each. Electrocardiogram (ECG) was recorded during these mental tasks and resting periods. Low frequency component (LF), high frequency component (HF), and LF/HF ratio of heart rate variability (HRV) were derived from ECG signals. NASA Task Load Index (NASA-TLX) was used to evaluate the subjective mental workload during each task. In the results, HR was significantly larger in the MA task than the resting period. LF was significantly smaller in the MA than the resting period before the task. On the other hand, no HR changes from the baseline in the MT task were found, suggesting that Pattern 2 response might appear. In the results of HRV indices, decrease in LF suggests the inhibition of the parasympathetic nervous system activity by the task. These results are consistent with those of our previous studies. No significant main interaction with age and blocks (MA, MT and resting periods) were found in physiological responses except for LF/HF and subjective mental workload score. Therefore, the physiological responses induced by mental tasks might be more susceptible to task characteristic than to aging. This study partly supported the previous study.

DOI： 10.1007/978-3-319-96059-3_34

Scopus

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Viewpoint classification for the bus-waiting blinds in congested traffic environment 査読有り国際誌

Tangsuksant W., Noda M., Kitagawa K., Wada C.

International Journal of Fuzzy Logic and Intelligent Systems 19 ( 1 ) 48 - 58 2019年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

© The Korean Institute of Intelligent Systems. To provide an effective notification service for the blinds awaiting the bus, it is crucial to have a viewpoint classification technique in which a viewpoint is defined with tilt and panning of camera. This paper proposes a viewpoint classification method using the car distribution information in the congested traffic environment. The proposed method takes four steps for classification. First, the YOLO algorithm is used to detect the car positions in the images. Second, the car positions are normalized for feature computation. Third, nineteen simple features are extracted and finally, the viewpoint classification is conducted. The proposed method uses the information gain measure to select relevant ones from the extracted features, and uses the Random Forest algorithm as a classifier. In the experiments, the proposed method has been tested for various roadside scenarios of congested traffic in day and night. The accuracies for car detection and viewpoint classification were 79:90% and 86:00%, respectively, which are improved compared to the prior work.

DOI： 10.5391/IJFIS.2019.19.1.48

Scopus

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松葉杖の脇当て保持に関わる筋活動の解析査読有り

西迫善希,永﨑孝之,和田親宗

理学療法科学 ( 理学療法科学学会 ) 34 ( 2 ) 199 - 204 2019年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

© 2019, Society of Physical Therapy Science (Rigaku Ryoho Kagakugakkai). All rights reserved. [Purpose] To clarify the reason why the axillary pad often deviates from the axilla during double-crutch walking using a musculoskeletal simulator. [Participants and Methods] The subjects were five healthy young males without orthopedic disease. Movement during crutch walking was measured using a 3D motion analysis system. Based on the obtained data, muscle activity related to the shoulder joint during double-crutch walking was modeled using a musculoskeletal simulation. [Results] The shoulder joint was abducted in the crutch stance phase of all subjects. [Conclusion] The results suggest that crutch walking with the shoulder blades rotated downward may suppress the activity of the abductor muscle of the shoulder joint and the activity of the shoulder joint adductor muscle.

DOI： 10.1589/rika.34.199

Scopus

CiNii Article

CiNii Research

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Usefulness of simulation method to improve efficiency of chair-to-wheelchair transfer of patients performed by caregivers 査読有り

Nakano Sota, Okada Hirotaka, Higo Shigeyoshi, Nakamura Kouichi, Kitagawa Kodai, Wada Chikamune

Journal of Physical Therapy Science ( 理学療法科学学会 ) 31 ( 10 ) 802 - 806 2019年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

<p> [Purpose] We aimed to clarify whether demonstration and simulated experience help the ability of care-receivers to get transferred, such as from the bed to the commode. [Participants and Methods] Participants included 28 nurses and 17 caregivers (34 females and 11 males). We developed a total floor reaction force measurement device to quantify the total loading level of care-receivers and caregivers and force shoes to quantify the loading level of the caregivers. Using these instruments, we constructed a system to measure the load on the lower limbs of the care-receivers during partial assistance. We divided the participants into the control, demonstration, and simulated experience method groups. We examined the differences in the load on the lower limbs before and after the intervention. [Results] The loads on the lower limbs of care-receivers when their buttocks were lifted from the chair were 11.7 ± 69.6, 61.8 ± 79.4, and 101.0 ± 104.0 N in the control, demonstration, and simulated experience groups. [Conclusion] These data suggest that the simulated experience method could help make use of the ability of the care-receiver to get transferred. Even care workers for the sanatorium-type sickbeds could learn to utilize the physical ability of the care-receivers using simulated experience.</p>

DOI： 10.1589/jpts.31.802

CiNii Article

CiNii Research

PubMed

その他リンク： https://ci.nii.ac.jp/naid/130007731293

Relationship between surface electromyography of the spinae erector muscles and subjectively adjusted step length in the supporting standing-up motion 査読有り

Kitagawa Kodai, Uezono Tsuyoshi, Nagasaki Takayuki, Nakano Sota, Wada Chikamune

Journal of Physical Therapy Science ( 理学療法科学学会 ) 31 ( 11 ) 869 - 872 2019年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

<p> [Purpose] Caregivers experience low back pain owing to frequent patient handling motions such as supporting the body while standing up. To prevent low back pain in caregivers, low load posture while engaging in patient handling motions is required. We determined the relationship between surface electromyography of the erector spinae muscles and subjective step length as "long" and "short" during the supporting standing-up motions of caregivers. [Participants and Methods] Ten young male participants were asked to perform supporting standing-up motion 10 times using two-step lengths comprised of subjective long and short steps. During supporting standing-up motion, we measured surface electromyograms of the erector spinae muscles and calculated the integral electromyographic values. [Results] The subjective long/short-step length normalized by body height did not differ across the participants. In addition, the subjective long-step length was longer than the subjective short-step length in all the participants. Integral electromyographic values for both the left and right erector spinae muscles in the short-step length were significantly lower than those in the long-step length when the data obtained from all the participants were used. [Conclusion] We considered that the load of the erector spinae muscle will be reduced if the short-step instead of the long-step instruction is given. In the future, instructions based on the subjective step-length variation in caregivers must be considered.</p>

DOI： 10.1589/jpts.31.869

CiNii Article

CiNii Research

PubMed

その他リンク： https://ci.nii.ac.jp/naid/130007751390

Development of real-time electromyography controlled 3D printed robot hand prototype 査読有り

Wahit M.A.A., Romzi F.Z., Ahmad S.A., Marhaban M.H., Chikamune W.

International Journal of Electrical and Computer Engineering Systems 10 ( 1 ) 35 - 44 2019年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

Developing an anthropomorphic robotic hand (ARH) has become a relevant research field due to the need to help the amputees live their life as normal people. However, the current state of research is unsatisfactory, especially in terms of structural design and the robot control method. This paper, which proposes a 3D printed ARH structure that follows the average size of an adult human hand, consists of five fingers with a tendon-driven actuator mechanism embedded in each finger structure. Besides that, the movement capability of the developed 3D printed robot hand validated by using motion capture analysis to ensure the similarity to the expected motion range in structural design is achieved. Its system functionality test was conducted in three stages: (1) muscular activity detection, (2) object detection for individualfinger movement control, and (3)integration ofbothstages in one algorithm. Finally, an ARHwas developed, whichresembles human hand features, as well as a reliable system that can perform opened hand palm and some grasping postures for daily use.

DOI： 10.32985/ijeces.10.1.5

Scopus

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Prototype of Musculoskeletal Model for Assistance Motion of Standing-up 査読有り

Kodai Kitagawa, Yoshiki Nishisako, Takayuki Nagasaki, Sota Nakano, Chikamune Wada

The 6th Symposium on Applied Engineering and Sciences 2018 259 - 260 2018年12月

Simulation of ultrasonic sensor placement for foot angle estimation 査読有り国際誌

Yejong Lee, Ibai Gorordo Femandez, Kodai Kitagawa, Chikamune Wada

International Symposium on Ubiquitous Healthcare 2018 23 2018年12月

Performance Evaluation of a Commercial Electromagnetic Tracking Controller for Motion Capture 査読有り

Ibai Gorordo Fernandez, Chikamune Wada

The 6th Symposium on Applied Engineering and Sciences 2018 124 - 125 2018年12月

Comparison of HSV and RGB ColorModels using Color Moment for Obstacles Matching along the Road 査読有り

Watcharin Tangsuksant, Chikamune Wada

The 6th Symposium on Applied Engineering and Sciences 2018 126 - 127 2018年12月

Comparison of Body-conducted sound sensor and Air-conducted sound Sensor via a lung sound simulator 査読有り

Takeshi Jouyashiki, Chikamune Wada

The 6th Symposium on Applied Engineering and Sciences 2018 128 - 129 2018年12月

Development of Real-time Secured Grasping System for Wearable Robotic Hand Glove 査読有り

Ahmed M. M. Almassri, W. Z. Wan Hasan, Chikamune Wada, Keiichi Horio, Siti Anom Ahmad, Suhaidi Shafie

The 6th Symposium on Applied Engineering and Sciences 2018 162 - 163 2018年12月

ストレス軽減のためのガム咀嚼のタイミングがRR間隔に及ぼす影響

福本舜介,和田親宗

第51回日本人間工学会中国四国支部大会講演番号307 2018年12月

鏡映描写課題遂行時におけるフロー状態に関する研究

倉岡宏幸，金愛未，高井瑠一朗，和田親宗，三宅晋司

日本人間工学会九州・沖縄支部第39回大会 2-1 2018年12月

Relationship between body acceleration and muscle load of upper limbs in lower-limb amputees during ladder climbing 査読有り

Iwasaki K., Okuya G., Chijiwa N., Arizono H., Wada C.

2018 International Conference on Information and Communication Technology Robotics, ICT-ROBOT 2018 2018年11月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEE. In recent years, the popularity of sports climbing competitions has increased. Currently, not only able-bodied people but also people with disabilities may be interested in sports climbing. However, evaluation and guidance in climbing competitions are subjective, and those who attempt sports climbing for the first time may find it difficult to compete. Additionally, the current training methods have been developed for able-bodied people, and it is not known whether they are suitable for people with disabilities. If an objective evaluation method is established, it will be possible to propose a rational and effective teaching method for sports climbing participants. Therefore, the ultimate goal of this study is to develop an objective training method for climbing for lower-leg amputees. We studied subjects climbing a ladder that imitated the wall-climbing process and analyzed the relationship between EMG of the upper limbs and body center acceleration during climbing, which revealed a close relationship.

DOI： 10.1109/ICT-ROBOT.2018.8549885

Scopus

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