Publications

* Choi, J., Lin, Y., Loh, P. Y. Influence of surface curvature and pinch span on the maximal force exertion of pinch grip: a prospective cohort study.  International Journal of Industrial Ergonomics. Vol. 109,  Article No. 103800, September 2025

*Luecha, T., Yeoh, W. L., Yang, Y., Choi, J., Loh, P. Y., & Muraki, S. (2025). Exploring Grip, Voice, and Electromyography Signals to Initiate Elbow Flexion With a Wearable Robot Arm. Journal of Robotics. May 2025

*Yang, Y., Yeoh, W. L., Choi, J., Luecha, T., Loh, P. Y., Muraki, S. Effects of control parameters of wearable robotics on muscle activity during assisted elbow flexion. International Journal of Industrial Ergonomics. Vol. 104, Article No. 103660, November 2024

* Choi, J., Maeda, N., Loh, P. Y. Effect of umbrella handle shape and grip type on muscle activation and postural variability under windy conditions, Applied Ergonomics. Vol. 116, Article No. 104208, April 2024 [Link]

* Choi, J., Loh, P. Y., Muraki, S. Transient Electromyographic Responses by Isokinetic Torque Release during Mechanically Assisted Elbow Flexion, Journal of Human Kinetics. Vol. 90, No. 17, January 2024

* Yeoh, W. L., Choi, J., Loh, P. Y., Saito, S., & Muraki, S. Users’ adaptations to the proportional speed control of a motorised walker. Disability and Rehabilitation: Assistive Technology, Vol. 18, No. 8, 2023

* Loh, P. Y., Choi, J., & Lin, Y. Impact of task variation and microbreaks on muscle fatigue at seated and standing postures. Work. Vol. 76, No. 3, pp. 1039-1045, November 2023

* Yeoh, W. L., Choi, J., Loh, P. Y., Fukuda, O., & Muraki, S. Motor Characteristics of Human Adaptations to External Assistive Forces. Journal of Robotics and Mechatronics. Vol. 35, No. 3, pp. 547-555, June 2023

* Choi, J., & Murakami, Y. Age-related change in response time for short speech under homogeneous intelligibility level. Acoustical Science and Technology. Vol. 44, No. 2, pp. 149-152, March 2023

* Choi, J., Lin, Y., Loh, P. Y. The Effects of Standing Working Posture on Operation Force and Upper Limb Muscle Activation When Using Different Pointing Devices. International Journal of Environmental Research and Public Health. Vol. 19, No. 16, Article No. 10217, August 2022

* Choi, J., Ogawa, T., Takesue, S., Muraki, S., Inoue, Y., Abe, H., Yamanoi, E. Different flooring surfaces affect infants’ crawling performance. Applied Ergonomics. Vol. 98, Article No. 103553, January 2022

* Matsuura, S., Choi, J., Luecha, T., Takesue, S., Muraki, S. Influence of wearable walking assistance on gait and subjective evaluation of healthy young adults (In Japanese). The Japanese Journal of Ergonomics. Vol. 56, No.6, pp. 253-258, December 2020

* Choi, J., Yeoh, W. L., Loh, P. Y., Muraki, S. Motor performance patterns between bilateral elbow movement and unilateral mechanical assistance. International Journal of Industrial Ergonomics. Vol. 80, Article No. 103056, November 2020

* Choi, J., Park, M. System dialog message and its effect on task switching by age. International Journal of Human-Computer Interaction. Vol. 27, No. 4, July 2020

* Yeoh, W. L., Choi, J., Loh, P. Y., Saito, S., Muraki, S. The effect of horizontal forces from a Smart Walker on gait and perceived exertion. Assistive Technology. March 2020

* Choi, J., Yeoh, W.L., Matsuura, S., Loh, P.Y., Muraki, S. Effects of mechanical assistance on muscle activation and motor performance during isometric elbow flexion. Journal of Electromyography and Kinesiology. Vol. 50, Article No. 102380, February 2020

* Wang, Y., Choi, J., Loh, P., Muraki, S. A comparison of motor control characteristics of the dominant and non-dominant arms in response to assistive force during unilateral task. Isokinetics and Exercise Science. Vol. 27, No. 4, pp. 313-324, November 2019

* Choi, J., Yeoh, W. L., Loh, P. Y., Muraki, S. Force and electromyography responses during isometric force release of different rates and step-down magnitudes. Human Movement Science. Vol. 67, Article No. 102516, October 2019

* Choi, J., Yeoh, W. L., Loh, P. Y., Muraki, S. Simulation study on the effects of adaptive time for assist considering release of isometric force during elbow flexion. Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) – Volume III: Musculoskeletal Disorders (pp. 347-350), January 2019

Presentations

* Choi, J., Loh, P.Y., Muraki, S. Investigation into force increase by assistance lost during isometric elbow flexion. The 11th International Conference on Applied Human Factors and Ergonomics (AHFE), USA, July 2020

* Choi, J., Muraki, S., Loh P.Y., Yeoh, W.L., Wang, Y., Nasir, N., Saito, S., Fukuda, O. Human physiological adaptations to exoskeleton robot and power augmentation, International Exhibition and Conference for Exoskeleton & Human Augmentation Systems (ExoBerlin) Germany, October 2019

* Choi, J., Loh, P.Y., Muraki, S. Motor control characteristics of assisted and voluntary force release. The 21st Korea-Japan Joint Symposium of Human Factors and Ergonomics, Japan, June 2019

* Choi, J., Loh, P.Y., Muraki, S. Simulation study on the effects of adaptive time for assistance considering release of isometric force during elbow flexion, The 20th Congress International Ergonomics Association (IEA), Italy, August 2018

* Choi, J., Loh, P.Y., Muraki, S. 動作アシストを想定した利用者のforce release のシミュレーション(In Japanese), The 59th Conference of Japanese Ergonomics Society (JES), Japan, June 2018

* Choi, J., Park, M. A study on system dialog message design by age considering interruption in task-switching, The 2nd Asian Conference on Ergonomics and Design (ACED), Japan, June 2017

Edits

* Research pamphlet (2020)

(English) “Assistive technology considering human characteristics”

(Japanese) 「人間の特性に配慮した動作拡張テクノロジー ー動作アシストの設計指針ー」