168

Transcription

1 hcwul@cyut.edu.tw 15 ( ) ( ) ( ) CFF (2 x ) CTD(Cumulative Trauma Disorders)

2 2009 [6] Kamiensla-Zyla1993 VDT [7] [8] (critical flicker fusion CFF) [3] [9] VDT [3] [10] CFF Karlqvist1994 [11] 96 CFF (carpal tunnel syndrome, CTS)[5] VDT 90 90% [4] VDT

3 2009 (Key-stroke rate) (error rate) (correction rate) [12] wpm(word per minute) 3.2 ACER 2 17LCD 10 ECG V ( ) ( ) ( ) ( FF) C ( SDNN ) CFF Microsoft Excel SPSS ± (Significance Level)a0.05

4 KBlog 24.5 Excel 3 30wpm(word per minute) F 4.2 p-p CFF (1) - CFF w/m (4) (2) 4 ASD HJKL (3) CFF CFF 0.04 CFF CFF CFF CFF

5 ASDF JKL ; (1) 5.2 (1) (2) Duncan (3) (2)

6 (3) (4) CFF CFF (5) ( ) (1) VDT (2)

7 VDT 150 VDT CTD CFF CFF (30 ) CFF CFF

8 2009 CFF without mouse use," Ergonomics, Vo1.37, No.7, pp CTD Kamiensla-Zyla, M., "Ergonomics evaluation CFF of the work of VDT operators in Poland," Applied Ergonomics, Vol. 24, No. 6, pp /03_detail.asp?mainid=4&id= %E6%96%87%E6%89%93%E5%AD%97 %E6%9C%BA Rempel, D., Gerson, J., Armstrong, T., Foulke, J. and Martin, B.,"Fingertip force while using three different keyboards, Proceedings of the Human Factors Society 35th Annual Meeting, pp ( Eds. ), Evaluation of Human Work: - London / supplementary rest breaks for data-entry.doc Karlqvist, L., Hagberg, M., Selin. K.,"Variation in upper limb posture and movement during word processing with and m Horie, Y., "A study on the evaluation of sample workload by a thermal video system,"in : Kumashiro M., and Megaw E. D., (Eds.), Towards human work: Solutions to problems in occupational health and safety, Taylor & Francis, Lodon, pp , Bullimore, M. A., Fulton, E. J., and Howarth, P. A.,"Assessment of visual performance, "in : Wilson, J. R., and Corelett, E. N., 12. Galinsky, T.L., Swanson, N.G., Sauter, S.L. and Hurrell, J. J., "A field study of operators," Ergonomics, Vol. 43, No. 5, pp

9 2009 EFFECTS OF INPUT METHOD AND BODY POSTURE ON WORK FATIGUE AND PERFORMANCE FOR TYPING CHINESE TEXT H.C. Wu C.B. Yang Department of Industrial Engineering and Management, Chaoyang University of Technology ABSTRACT The purpose of this study was to evaluate the performance and psychophysical fatigue for Typing Chinese Text. Fifteen subjects participated in this study voluntarily. The independent variables were Chinese input method (New phonetic notation, Boshiamy, Cangjie), elbow angle ( ) and body posture (sitting and lying). Four dependent measures were change in Critical Fusion Frequency (CFF), typing performance and subjective fatigue. Each subject used his/her master Chinese input method to perform six experimental trials with six different body-posture and elbow-angle combinations, respectively. Each subject spent 180 min for the experiment. Each trial took 30 min. The results indicated the input method had a significant effect on the measured key-stroke. The Cangjie group had the most total key-stroke numbers, followed by Boshiamy and New phonetic notation groups. In order to avoid the CTD (Cumulative Trauma Disorders) disease derived from great key-stroke numbers, the Boshiamy input method is suggested. It has less key-stroke numbers, quicker input speed, lower error rate and shorter movement of the fingers. The input speed and key-stroke number were significantly influenced by the body posture. The elbow angle preference, feelings of tenseness, back load, arm and back pains were also affected significantly by body posture. The sitting posture is more comfortable for the most subjective ratings. The mental work load was lower in lying than in sitting posture. The back was more comfortable, but the arms were more discomfort in lying posture. The elbow angle had a significant effect on key-stroke number. The angle of elbow is relatively good for 90 and 120 degrees. This experiment proves that the best angle of elbow is not only 90 degrees. The sitting-posture typing is better in the overall performance and fatigue. But the workstation with lying posture could reduce the back load, offering another choice for the people who are unsuitable to sit and type for a long time. Keywords: psychophysical fatigue; input method; body posture; elbow angle; typing tasks