Proceedings of the Human Factors Society Annual Meeting, 1980
machine i n d u s t r i a l p r o d u c t i o n t a s k , o n l y t h e c o m b i n a t i o n o f... more machine i n d u s t r i a l p r o d u c t i o n t a s k , o n l y t h e c o m b i n a t i o n o f p r o d u c t i o n f e e d b a c k on q u a n t i t y and q u a l i t y i n t h e p r e s e n c e o f a h i g h-t a s k p r o d u c t i o n s t a n d a r d had s i g n i f i c a n t p o s i t i v e e f f e c t o r i m p a c t on w o r k e r p r o d u c t i v i t y , s a t i s f a c t i o n and j o b a t t i t u d e s , a l l a t t h e same time. The p e r c e n t a g e i nc r e a s e i n p r o d u c t i o n q u a n t i t y and q u a l i t y o u t p u t w e r e 1 3 % and 15% r e s p e ct i v e l y , compared t o t h e c o n t r o l g r o u p. T h e a s s i g n e d h i g h-t a s k p r o d u c t i o n s t a n d a r d and t h e o p e r a t o r s i n c r e a s e d workpace d i d n o t c a u s e an a d v e r s e e f f e c t on w o r k e r p h y s i o l o g i c a l c o s t. The i n c o r p o r a t i o n o f an a s s i g n e d normal o r h i g h-t a s k p r o d u c t i o n s t a n d a r d had no i m p a c t on w o r k e r p r o d u ct i v i t y. However, t h e p r o v i s i o n o f p r o d u c t i o n q u a n t i t y and q u a l i t y f e e dback had a f a v o r a b l e e f f e c t on w o r k e r s a t i s f a c t i o n and j o b a t t i t u d e s. T h e m o n e t a r y i n c e n t i v e had no b e n e f i c i a l e f f e c t on w o r k e r p r o d u c t i v i t y , s a t i s f a c t i o n and j o b a t t i t u d e s .
1. B. Das and J. W. Farley, J. Chem. Phys. 95, 8809 (1991) 2. H. Lew, Can. J. Phys. 54, 2028 (197... more 1. B. Das and J. W. Farley, J. Chem. Phys. 95, 8809 (1991) 2. H. Lew, Can. J. Phys. 54, 2028 (1976). 3. H. Lew and R. Groleau, Can. J. Phys. 65, 739 (1987). 4. Supported by NSF and DOE.
International Journal of Occupational Safety and Ergonomics, 2000
The isometric strength profiles of male and female paraplegics were determined for pull and push ... more The isometric strength profiles of male and female paraplegics were determined for pull and push strengths in the normal, maximum, and extreme working reach envelopes. A computerized isometric strength measurement system was designed and constructed for the purpose. The strongest pull location was at extreme reach vertically above the shoulder and the strength values for males and females were 473 and 318 newtons (N), respectively. The strongest push location was at maximum reach, at vertical ($) angle of 45° and at horizontal (6) angle of 45° for males and at 0° for women and the strength values were 235 and 172 N, respectively. The nature of the strength profiles was found to be similar for both the sexes. The pull and push strengths of the female were 77 and 68% that of the male, respectively. isometric strength measurement pull and push strengths workspace reach envelopes paraplegics This research was funded by the Rick Hansen Man in M otion Legacy Fund (# 9 2-5 0). The assistance o f the Natural Sciences and Engineering Research Council (NSERC) o f Canada and the Canadian Paraplegic A ssociation is appreciated.
Page 1. PROCEEDINGS of the HUMAN FACTORS SOCIETY-27th ANNUAL MEETING-7983 PERSONAL FACTORS AFFECT... more Page 1. PROCEEDINGS of the HUMAN FACTORS SOCIETY-27th ANNUAL MEETING-7983 PERSONAL FACTORS AFFECTING WORKER SATISFACTION AND JOB ATTITUDES IN INDUSTRIAL ORGANIZATIONS Biman Das ...
Squires' concept provided a substantial increase over Farley's concept in the o... more Squires' concept provided a substantial increase over Farley's concept in the one-handed, two-handed and total normal working areas and in the normal front range for all types of operators and resulted in a relatively small decrease in the normal side range in all but ...
The three-dimensional Computerized Isometric Strength Measurement System (CISMS) reliably and acc... more The three-dimensional Computerized Isometric Strength Measurement System (CISMS) reliably and accurately measures isometric pull and push strengths in workspaces of paraplegic populations while anticipating comparative studies with other populations. The main elements of the system were: an extendable arm, a vertical supporting track, a rotating platform, a force transducer, stability sensors and a computerized data collection interface. The CISMS with minor modification was successfully used to measure isometric push-up and pull-down strengths of paraplegics and isometric push, pull, push-up and pull-down strength in workspaces for seated and standing able-bodied populations. The instrument has satisfied criteria of versatility, safety and comfort, ease of operation, and durability. Results are accurate within 2 N for aligned forces. Costing approximately $1,500 (US) including computer, the system is affordable and accurate for aligned isometric strength measurements.
The increased work pace of the operators in a human-machine production task resulting from the pr... more The increased work pace of the operators in a human-machine production task resulting from the provision of an assigned hard-task production standard in conjunction with production quantity and quality feedback, did not have a significant adverse effect on worker physiological cost. The operators who were provided with this experimental condition had an average first recovery heart/pulse rate of 81 beats per minute (bpm), which was within the normal range of 60 and 100 bpm for light work load and certainly within the safe limit of 110 bpm. Some of the operators pulse rate did not change, while for some other operators it even went down after the task performance. The pulse rate of some of the operators showed no recovery while some other operators pulse rate showed reverse or negative recovery.
Proceedings of the Human Factors Society Annual Meeting, 1980
machine i n d u s t r i a l p r o d u c t i o n t a s k , o n l y t h e c o m b i n a t i o n o f... more machine i n d u s t r i a l p r o d u c t i o n t a s k , o n l y t h e c o m b i n a t i o n o f p r o d u c t i o n f e e d b a c k on q u a n t i t y and q u a l i t y i n t h e p r e s e n c e o f a h i g h-t a s k p r o d u c t i o n s t a n d a r d had s i g n i f i c a n t p o s i t i v e e f f e c t o r i m p a c t on w o r k e r p r o d u c t i v i t y , s a t i s f a c t i o n and j o b a t t i t u d e s , a l l a t t h e same time. The p e r c e n t a g e i nc r e a s e i n p r o d u c t i o n q u a n t i t y and q u a l i t y o u t p u t w e r e 1 3 % and 15% r e s p e ct i v e l y , compared t o t h e c o n t r o l g r o u p. T h e a s s i g n e d h i g h-t a s k p r o d u c t i o n s t a n d a r d and t h e o p e r a t o r s i n c r e a s e d workpace d i d n o t c a u s e an a d v e r s e e f f e c t on w o r k e r p h y s i o l o g i c a l c o s t. The i n c o r p o r a t i o n o f an a s s i g n e d normal o r h i g h-t a s k p r o d u c t i o n s t a n d a r d had no i m p a c t on w o r k e r p r o d u ct i v i t y. However, t h e p r o v i s i o n o f p r o d u c t i o n q u a n t i t y and q u a l i t y f e e dback had a f a v o r a b l e e f f e c t on w o r k e r s a t i s f a c t i o n and j o b a t t i t u d e s. T h e m o n e t a r y i n c e n t i v e had no b e n e f i c i a l e f f e c t on w o r k e r p r o d u c t i v i t y , s a t i s f a c t i o n and j o b a t t i t u d e s .
1. B. Das and J. W. Farley, J. Chem. Phys. 95, 8809 (1991) 2. H. Lew, Can. J. Phys. 54, 2028 (197... more 1. B. Das and J. W. Farley, J. Chem. Phys. 95, 8809 (1991) 2. H. Lew, Can. J. Phys. 54, 2028 (1976). 3. H. Lew and R. Groleau, Can. J. Phys. 65, 739 (1987). 4. Supported by NSF and DOE.
International Journal of Occupational Safety and Ergonomics, 2000
The isometric strength profiles of male and female paraplegics were determined for pull and push ... more The isometric strength profiles of male and female paraplegics were determined for pull and push strengths in the normal, maximum, and extreme working reach envelopes. A computerized isometric strength measurement system was designed and constructed for the purpose. The strongest pull location was at extreme reach vertically above the shoulder and the strength values for males and females were 473 and 318 newtons (N), respectively. The strongest push location was at maximum reach, at vertical ($) angle of 45° and at horizontal (6) angle of 45° for males and at 0° for women and the strength values were 235 and 172 N, respectively. The nature of the strength profiles was found to be similar for both the sexes. The pull and push strengths of the female were 77 and 68% that of the male, respectively. isometric strength measurement pull and push strengths workspace reach envelopes paraplegics This research was funded by the Rick Hansen Man in M otion Legacy Fund (# 9 2-5 0). The assistance o f the Natural Sciences and Engineering Research Council (NSERC) o f Canada and the Canadian Paraplegic A ssociation is appreciated.
Page 1. PROCEEDINGS of the HUMAN FACTORS SOCIETY-27th ANNUAL MEETING-7983 PERSONAL FACTORS AFFECT... more Page 1. PROCEEDINGS of the HUMAN FACTORS SOCIETY-27th ANNUAL MEETING-7983 PERSONAL FACTORS AFFECTING WORKER SATISFACTION AND JOB ATTITUDES IN INDUSTRIAL ORGANIZATIONS Biman Das ...
Squires' concept provided a substantial increase over Farley's concept in the o... more Squires' concept provided a substantial increase over Farley's concept in the one-handed, two-handed and total normal working areas and in the normal front range for all types of operators and resulted in a relatively small decrease in the normal side range in all but ...
The three-dimensional Computerized Isometric Strength Measurement System (CISMS) reliably and acc... more The three-dimensional Computerized Isometric Strength Measurement System (CISMS) reliably and accurately measures isometric pull and push strengths in workspaces of paraplegic populations while anticipating comparative studies with other populations. The main elements of the system were: an extendable arm, a vertical supporting track, a rotating platform, a force transducer, stability sensors and a computerized data collection interface. The CISMS with minor modification was successfully used to measure isometric push-up and pull-down strengths of paraplegics and isometric push, pull, push-up and pull-down strength in workspaces for seated and standing able-bodied populations. The instrument has satisfied criteria of versatility, safety and comfort, ease of operation, and durability. Results are accurate within 2 N for aligned forces. Costing approximately $1,500 (US) including computer, the system is affordable and accurate for aligned isometric strength measurements.
The increased work pace of the operators in a human-machine production task resulting from the pr... more The increased work pace of the operators in a human-machine production task resulting from the provision of an assigned hard-task production standard in conjunction with production quantity and quality feedback, did not have a significant adverse effect on worker physiological cost. The operators who were provided with this experimental condition had an average first recovery heart/pulse rate of 81 beats per minute (bpm), which was within the normal range of 60 and 100 bpm for light work load and certainly within the safe limit of 110 bpm. Some of the operators pulse rate did not change, while for some other operators it even went down after the task performance. The pulse rate of some of the operators showed no recovery while some other operators pulse rate showed reverse or negative recovery.
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