Ergonomics at Work |
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Page 175
... backrest . If the seat is any deeper than the thigh length of the shortest person , the front edge of the seat will restrain him , causing his lumbar area to curve to reach the backrest . In addition the pressure- sensitive areas at the ...
... backrest . If the seat is any deeper than the thigh length of the shortest person , the front edge of the seat will restrain him , causing his lumbar area to curve to reach the backrest . In addition the pressure- sensitive areas at the ...
Page 177
... backrest will be less apparent ; other muscles , therefore , could be overworked to compensate for the reduced dorsal muscle load . Backrest height and width : up to 48 to 63 cm high ; 35 to 48 cm wide The proposed dimensions of the ...
... backrest will be less apparent ; other muscles , therefore , could be overworked to compensate for the reduced dorsal muscle load . Backrest height and width : up to 48 to 63 cm high ; 35 to 48 cm wide The proposed dimensions of the ...
Page 178
... backrest , many authors suggest that the backrest should have an open area or should recede just above the seat pan . A space of at least 12.5 to 20 cm is required to accommodate the buttocks in this way . Finally , a high backrest ...
... backrest , many authors suggest that the backrest should have an open area or should recede just above the seat pan . A space of at least 12.5 to 20 cm is required to accommodate the buttocks in this way . Finally , a high backrest ...
Contents
Ergonomics Past and Present | 1 |
I The Sensory Nervous System | 14 |
II Body Size and Movement | 32 |
Copyright | |
14 other sections not shown
Common terms and phrases
ability able accidents action acuity addition analogue angle anthropometric appear appropriate arrangement aspects auditory backrest behaviour biorhythm body carried cause cent Chapter circadian rhythms coding colour comfort compared complex components considered cues db(A degrees F demonstrated dial digital display dimensions discussed effects efficiency environment environmental ergonomics ergonomist errors example experience fatigue feedback Figure frequency function glare Human Factors hyperthermia illumination levels important increased indicated infrasound inspection intensity investigated ischial tuberosities knob light luminance machine man-machine system masking movement moving muscles muscular noise normal object observer occur operator operator's optimum performance perhaps photopic vision pointer position posture presbycusis problems Procrustes produced proprioceptive reading reduced relationship reproduced by permission retina seat signal sitter Snellen chart sound speed stimulus subjects suggest switch task temperature vibration visual acuity visual field workers workplace