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B S Caldwell

Publications and source records attributed to B S Caldwell.

8 recordsLinked to original sources

Information and communication technology needs for distributed communication and coordination during expedition-class spaceflight.

AO-lU. Expedition-class missions are distinct from historical human presence in space in ways that significantly affect information flow and information technology designs for such missions. The centrality of Mission Control in these missions is challenged by the distances, associated communication delays, and durations of expeditions, all of which require crews to have more local resources available to manage on-board situations. The author's current research investigates how ground controllers effectively allocate communications bandwidth, cognitive resources, and knowledge sharing skills during time critical routine and non-routine situations. The research focus is on team-based information and communication technology (ICT) use to provide recommendations for improvements to support adaptive bandwidth allocations and improved sharing of data and knowledge in Mission Control contexts. In order to further improve communication and coordination between controllers and crew, additional ICT support resources will be needed to provide shared context knowledge and dynamic assessment of costs and benefits for accessing local information vs. remote expertise. Crew members will have critical needs to understand the goals, intentions, and situational constraints associated with mission information resources in order to use them most effectively in conditions where ground-based expertise is insufficient or requires more time to access and coordinate than local task demands permit. Results of this research will serve to improve the design and implementation of ICT systems to improve human performance capabilities and system operating tolerances for exploration missions. (Specific research data were not available at the time of publication.)

Communication↗

Human performance and control of multiple systems.

Many systems involving multiple remote sensors or machines require a single operator to control more than one device simultaneously. Interface design issues for such systems can be formidable because the inherent complexity of multiple-platform control creates significant opportunities for operator confusion and overload. An exploratory study was conducted to examine some of these issues using a simulated industrial security task. The experiment manipulated the type of remote sensor (fixed-site or mobile), the number of displays that had to be monitored, and two types of event complexity (number of targets and redundancy of target images) using response time as the dependent measure. Results showed that significant performance penalties may be encountered in multiple-platform control and that these penalties accumulate at seemingly low levels of complexity.

Adult↗

A care-by-parent unit: its planning, implementation and patient satisfaction.

Influenced by a shortage of nurses, the high cost of hospitalization, and a belief that parents can give adequate care to certain hospitalized children, a care-by-parent unit (CBPU) was developed. Patient care is provided by parents. No nurses are on the unit; a unit coordinator is the only hospital personnel. A care-by-parent committee composed of representatives from several disciplines gives direction to the unit. Unit success has been measured by several criteria. Cost-per-patient day has been lowered, physicians have expressed satisfaction, and a survey of children and their parents indicates that both are highly supportive of the unit.

Child↗