Annals of Occupational and Environmental Medicine

Sang Hyuk Yim

3 Articles

Human Factors Involved in Traffic Accidents and Unsafe Driving Behaviors of Taxi Drivers: Kan woo Youn, Sang yun Lee, Sang hyuk Yim; Korean Journal of Occupational and Environmental Medicine 2006;18(4):307-317. Published online December 31, 2006; DOI: https://doi.org/10.35371/kjoem.2006.18.4.307

OBJECTIVE: This study investigated the driving habits of taxi drivers, in order to examine the characteristics of human factors causing traffic accidents and unsafe driving behavior and to determine any relevancy among them.
METHOD
Taxi drivers (N=335) answered a questionnaire investigating various measures of human factors, unsafe driving behaviors, and number of traffic accident experiences in the previous year. In factor analysis, the characteristics of human factors were classified into 5 common factors: job, mental health, age, health habit and sleep factor. A contextual mediated model was proposed to distinguish the distal (5 common factors) and proximal (unsafe driving behaviors) factors in predicting traffic accident involvement by hierarchical multiple regression.
RESULT
In hierarchical multiple regression, job factor(beta: 0.122), sleep factor (beta: 0.114) and unsafe driving behaviors (beta: 0.018) yielded a direct effect on the rate of traffic accidents. Mental health factor beta: 6.429), job factor (beta: 1.319) and health habit factor(beta: 1.177) yielded a indirect effect on the rate of traffic accidents by unsafe driving behaviors.
CONCLUSION
Various human factors co-related by the unique characteristics that exist in the taxi service industry have significant effects on the rate of traffic accidents mediated by unsafe driving behaviors. Therefore a proper countermeasure against these factors should be established in order to effectively reduce the rate of taxi accidents.

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The epidemiology of road traffic accidents and associated factors among drivers in Dilla Town, Southern Ethiopia
Habtamu Endashaw Hareru, Belay Negassa, Reta Kassa Abebe, Eden Ashenafi, Getachew Assefa Zenebe, Berhanu Gidisa Debela, Zemachu Ashuro, Negasa Eshete Soboksa
Frontiers in Public Health.2022;[Epub] CrossRef
The effect of long working hours on cerebrovascular and cardiovascular disease; A case‐crossover study
Kyong‐sok Shin, Yun kyung Chung, Young‐Jun Kwon, Jun‐Seok Son, Se‐hoon Lee
American Journal of Industrial Medicine.2017; 60(9): 753. CrossRef
Correlations among occupational stress, fatigue, and depression in call center employees in Seoul
Yun Kyung Kim, Nam Hyun Cha
Journal of Physical Therapy Science.2015; 27(10): 3191. CrossRef
The Relationship among bus Driver's Personality Traits, Safety Job Performance and Traffic Accidents
Woohyun Ahn, Sunhee Lee, Sunyoung Park
Journal of the Korean Society of Safety.2014; 29(2): 68. CrossRef
A Study on Level of Safety Awareness and Disaster Prevention Measures According to Driver's Characteristic
Man-Soo Lee
Journal of the Korea Safety Management and Science.2013; 15(4): 131. CrossRef

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The Association of Carbon Disulfide Poisoning with Heart Rate Variability: Hyung Joon Jhun, Sang Hyuk Yim, Do Myung Paek; Korean Journal of Occupational and Environmental Medicine 2004;16(1):48-56. Published online March 31, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.1.48

Abstract PDF: OBJECTIVES
Mass poisoning by carbon disulfide (CS2) occurred in a viscose rayon factory in Korea. Up until 1998, 830 employees, including 38 who had died, were diagnosed with CS2 poisoning. Among the CS2 poisoned subjects, heart rate variability (HRV) was evaluated to investigate whether the toxic effect of CS2 persists after the exposure has ceased. The dose-response relationship between carbon disulfide exposure and HRV was also evaluated.
METHODS
The case group was comprised of 71 retired male workers diagnosed as being CS2 poisoned. The control group was comprised of 127 males of same age-range who had no history of CS2 exposure and cardiovascular diseases. Information on individual age, height, weight, cigarette smoking, alcohol drinking, regular exercise, medical and occupational history, chest x-ray, and ECG recording of the two groups were collected through a self-administered questionnaire and with a medical examination. Time (maximum, average, minimum RR interval) and frequency domain measures (low frequency - LF, high frequency - HF, total power spectrum TPS, and LF/HF ratio) of the two groups were analyzed. CS2 exposure indices of the case group (duration of employment, exposure level per work department, cumulative exposure index and duration of retirement) were investigated.
RESULTS
Using a univariate analysis, the frequency domain measures for the case group were significantly lower than those in the control group, except for HF. In the multivariate analysis, previous history of CS2 poisoning was inversely related to all frequency domain parameters and it significantly affected the LF (p<0.05) and the LF/HF ratio (p<0.05). There was no significant dose-response relationship between CS2 exposure indices and HRV parameters in the case group.
CONCLUSION
This study suggests that further studies are necessary to evaluate the residual effects of CS2 poisoning even after the CS2 exposure has ceased.

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Assessing Muscle Tensions During VDT Works with Surface Electromyography: Sang Hyuk Yim, Hee Sok Park, Hyun Wook Kim; Korean Journal of Occupational and Environmental Medicine 2000;12(4):524-536. Published online December 31, 2000; DOI: https://doi.org/10.35371/kjoem.2000.12.4.524

Abstract PDF

OBJECTS: Thls study was designed to assess muscle tensions while working at a YDT workstation with surface electromyography (SEMG).
METHODS
Variables texted were desk height, monitor positon on the desk, distance from edge of the desk to the keyboard. Eleven female volunteers working in the tele-com munication company were seated at an ergonomically adjusted workstation. They were assigned to a task of typing for 5 minutes and were given a 10 minutes resting with hands in their lap. For the initial experiment, the desk height was fixed to standard desk height(65.0 cm) recommended by ANSI and latter adjusted to a higher desk height (72.8 cm) for this study such that the subjects experienced slight elevation of shoulders. The monitor position initially at the center on the desk and latter left site of the desk (45o from monitorneck axles). The keyboard was positioned to an optimal distance (15 cm from the desk edge) and an abnormal distance (30 cm). Five muscle groups (paraspinal muscles, upper trapezium muscle, supraspinatus muscle, infraspinatus muscle, and rhomboid muscle) were selected for the study. The data of SEMG were analyzed by 2x2x2xs mixed factorial design.
RESULTS
The results were as follows: 1. SEMG activity recorded from the paraspinal muscles were significantly higher when the angle of the monitor adjusted to 45 degree from the center of the desk.. 2. SEMG activity recorded from the upper trapezius/supraspinatus/infraspinatus muscles were significantly higher when the hight of the desk was elevated from the recommended height.3. SEMG activity from the rhomboid muscle showed no significantiy difference in all test conditions.
CONCLUSIONS
The results of thls study confirm that the helght of a VDT workstation and the angle of the monitor are risk factors of upper extremity cumulative trauma disorders. Also SEMG would be useful for measuring muscle activities during workstation assessment.

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Effects of the Computer Desk Level on the Musculoskeletal Discomfort of Neck and Upper Extremities and EMG Activities in Patients with Spinal Cord Injuries
Bo-Ra Kang, Jin-Gang Her, Ju-Sang Lee, Tae-Sung Ko, Young-Youl You
Occupational Therapy International.2019; 2019: 1. CrossRef
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Hye-Lim Chun, Kyung-Hun Kim, Bo-Ram Choi
The Journal of Korean Academy of Physical Therapy Science.2017; 24(3): 56. CrossRef
Effect of Treatment Table Height on Shoulder Muscles during Ultrasound Therapy Work
Chung Yoo Kim, In Bae Kim, Jong Ho Kang, Eun Kyung Kim
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The Study of Muscle Fatigue and Risks of Musculoskeletal System Disorders from Text Inputting on a Smartphone
Kyung Ko, Hee-Soo Kim, Ji-Hea Woo
Journal of the Ergonomics Society of Korea.2013; 32(3): 273. CrossRef
Effect of Neck Position on Muscle Fatigue during Shaker Exercise
Eun-Jung Park, Jung-Wan Koo
Journal of the Ergonomics Society of Korea.2013; 32(6): 541. CrossRef

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