The specific aim of this paper is to model the vision-posture coupling behavior, which is important for astronauts to stabilize their locomotion in partial gravities as the National Aeronautics and Space Administration plans for manned missions to the Moon and Mars . As such, an optimal scheme is assumed in postural-control processes to stabilize visual optical flows. An experiment was conducted, in which human subjects attended a visual-gait tracking task. In tracking control, head position errors can be used to regulate inputs so that appropriate compensatory changes can be obtained. The "optimal" scheme describes a compromise between postural adjusting efforts and tracking errors. The results show that the proposed optimal-control model describes the gait tracking process more reliably than McRuer's crossover model of the human-plant compensatory behaviors. In practice, if the tracking goal is to be roughly right rather than precisely wrong, this paper also provides the experimental data regarding the human tolerance and achievable performance under various unloading conditions and tracking difficulties. This information and related experimental setup could also be applied to postsurgery gait rehabilitation.

Article Free Access Share on Data warehousing in an integrated health system: building the business case Authors: Edward F. Ewen Director of Disease Management, Christiana Care Health System Director of Disease Management, Christiana Care Health SystemView Profile , Carl E. Medsker Research Engineer, Drexel University Research Engineer, Drexel UniversityView Profile , Laura E. Dusterhoft Project Coordinator, Christiana Care Health System Project Coordinator, Christiana Care Health SystemView Profile Authors Info & Claims DOLAP '98: Proceedings of the 1st ACM international workshop on Data warehousing and OLAPNovember 1998 Pages 47–53https://doi.org/10.1145/294260.294271Published:01 November 1998Publication History 12citation2,360DownloadsMetricsTotal Citations12Total Downloads2,360Last 12 Months68Last 6 weeks5 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF