Showing papers on "Task (computing) published in 1968"

Study of work-producing characteristics of underwater operations.

Abstract: : The effects of alterations in task nature/task workload configuration upon the work-producing characteristics of humans performing specific underwater manual tasks were examined. The tasks examined were: (1) A simple repetitive rotary task requiring continuous torque production against known resistances in a self-paced manner. Six-, nine-, and twelve-inch radius handles were employed against three-, six-, and nine-pound resistance levels. (2) A simple, repetitive, discontinuous flexion/extension task requiring the exertion of linear forces against known resistances in a self-paced manner. Three resistance levels were employed, six, nine, and twelve pounds exerted at the handle. During all work, heart rate and three skin temperatures were continuously monitored and recorded. Oxygen uptakes were obtained by direct measurement in underwater work and by indirect measurement in dry work. The results obtained were examined as functions of task, load, and environment. Performance differences were discussed in terms of their implications to system designers. (Author)