VDT Worker's Posture and Workload in Free-Address Office System

Iwakiri, Kazuyuki; Mori, Ippei; Sotoyama, Midori; Nose, Kaori; Ochiai, Takanori; Jonai, Hiroshi; Saito, Susumu

doi:10.1539/sangyoeisei.48.7

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…In our method, the YCbCr color space model is used to transform from the RGB image to the YCbCr color space in Eq. (4).…”

Section: Skin Color Detectionmentioning

confidence: 99%

“…Sitting a long time in front of VDTs changes the working habits and reduces the physical movements of workers. It has negative effects on the health of the workers [1–4] like a headache considered as a typical sign of fatigue [5]. Moreover, despite the efforts to fully automate quality control processes in companies, the utilization of a machine besides a human is still the best solution because of the quality and cost [6].…”

Section: Introductionmentioning

confidence: 99%

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Prediction of the VDT Worker's Headache Using Convolutional Neural Network with Class Activation Mapping

Sharara

Tsuji

Karungaru

et al. 2020

IEEJ Transactions Elec Engng

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A headache and drowsiness are the most common symptoms of fatigue caused by a long duration of work using a visual display terminal (VDT). A sign of the headache generally involves placing a hand on the head, eyes, nose, or face. The recognition of these gestures is a challenging problem due to the difficulty in similar skin color of hands and face. In this paper, a method for classifying six hand over face poses, which can identify the signs of headache for the VDT workers is presented. In the proposed method, a deep learning based on a convolutional neural network (CNN) for the classification of the hand poses is applied. In addition, a class activation map (CAM) to visualize the prediction of the classification network for localization of the hand over face poses was implemented. From the experimental results, the hand poses as the signs of frontal, and unilateral headaches without the classification overfitting and data biasing errors were successfully classified. Our proposed method has achieved high accuracy recognition ratio of 98.5% for classification of the hand over face poses as the prediction of headaches.

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“…In our method, the YCbCr color space model is used to transform from the RGB image to the YCbCr color space in Eq. (4).…”

Section: Skin Color Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of the VDT Worker's Headache Using Convolutional Neural Network with Class Activation Mapping

Sharara

Tsuji

Karungaru

et al. 2020

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

show abstract

“…There is a growing incidence of neck and shoulder pain, owing to prolonged malalignment posture with head protraction 1,2) . It is usually caused by sedentary lifestyle, such as using a computer, watching TV or driving 1,2) .…”

Section: Introductionmentioning

confidence: 99%

“…It is usually caused by sedentary lifestyle, such as using a computer, watching TV or driving 1,2) . Repetitive extension with head protraction can also alter the biomechanics of the cervical spine.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Intervertebral Body Angle of the Lower Cervical Spine during Protracted Head Extension Using Measured by Fluoroscopy

et al. 2013

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Abstract.[Purpose] To analyze dynamic lower cervical spine kinematics under neutral head extension (Ex) and protracted head extension (Pro-Ex) using fluoroscopy.[Method] The intervertebral body angle of the lower cervical spine of 8 healthy individual was analyzed using fluoroscopy during cervical extension with the head in the neutral (Ex) and protracted (Pro-Ex) positions.[Results] At maximum cervical extension position, we noted a significanly smaller value in the Pro-Ex position than in Ex position. During extension, the intervertebral body angle was significantly greater at C3-4 and less at C6-7 level in the Pro-Ex position compared to the Ex position in the initial phase. However, there was no significant difference in the intervertebral body angle between the two positions in final phase of extension. This shows greater extension movement C6-7 level in Pro-Ex.[Conclusion] The pro-Ex result showed less range of motion of extension. This suggests exaggerated hypermobility in the lower segments of the cervical spine, which might be implicated in early degenerative disease of the cervical spine.

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