Zobrazeno 1 - 10
of 13
pro vyhledávání: '"W. S. MARRAS"'
Autor:
D. E. Treaster, W. S. Marras
Publikováno v:
Proceedings of the Human Factors and Ergonomics Society Annual Meeting. 44:685-688
The goal of this study was to assess the effect of alternate keyboard designs on the tendon travel of the flexor digitorum superficialis (FDS) and flexor digitorum profundus (FDP). A repeated measures experiment was conducted with 10 keyboard conditi
Publikováno v:
Journal of agricultural safety and health. 10(4)
Little information currently exists regarding the risk of low-back disorders among youth who perform physically demanding farm activities. Thus, afield study was conducted in which children and adolescents who engage in farm work were recruited, fitt
Publikováno v:
Journal of spinal disorders. 10(2)
A novel testing protocol was used to investigate changes in neuromuscular performance, muscle recruitment, and spinal loading as subjects became fatigued while performing an isometric endurance test of varying torque requirements. There was decreased
Publikováno v:
Journal of spinal disorders. 8(1)
Diurnal variation in trunk flexibility, defined as changes in range of motion, has been previously observed and quantified. Prior studies have shown that decreased disk height occurs as the day progresses and allows the spinal ligaments to slacken, r
Autor:
G A, Mirka, W S, Marras
Publikováno v:
Spine. 18(11)
Biomechanical models of the spine have traditionally assumed that workplace lifting conditions (weight, posture, motion, etc.) precisely dictate the magnitude of individual muscle forces necessary to maintain a biomechanical balance within the trunk.
Autor:
W S, Marras
Publikováno v:
Occupational medicine (Philadelphia, Pa.). 7(4)
Although researchers have shown that dynamic activity may greatly increase the predicted loading experienced by a joint, most ergonomic assessments in the workplace have focused on the postures of the workers and the loads imposed on a joint due to t
Autor:
W. S. MARRAS, C. H. REILLY
Publikováno v:
Spine. 13:661-667
Autor:
W. S. Marras
Publikováno v:
Proceedings of the Human Factors Society Annual Meeting. 27:284-288
Biomechanical models of the trunk may be useful in ergonomic design of equipment, workstations, manual materials handing situation and clinical evaluation. Recently a trunk load analysis method was proposed by Schultz and Andersson (1981). This metho