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Next Generation Air Transportation System: FAA and NASA Have Improved Human Factors Research Coordination, but Stronger Leadership Needed

Description: A letter report issued by the Government Accountability Office with an abstract that begins "To address challenges to the aviation industry's economic health and safety, the Federal Aviation Administration (FAA) is collaborating with the National Aeronautics and Space Administration (NASA) and other federal partners to plan and implement the Next Generation Air Transportation System (NextGen). NextGen will transform the current radar-based air traffic control system into a satellite-based system. Pilot and air traffic controller roles and responsibilities are expected to become more automated, thereby requiring an understanding of human factors, which studies how humans' abilities, characteristics, and limitations interact with the design of the equipment they use, environments in which they function, and jobs they perform. FAA and NASA are tasked with incorporating human factors issues into NextGen. As requested, this report discusses the extent to which FAA's and NASA's human factors research (1) is coordinated and (2) supports NextGen. To address these issues, GAO reviewed coordination mechanisms and planning documents and synthesized the views of nine aviation human factors experts."
Date: August 6, 2010
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department

Development of Sensors and Sensing Technology for Hydrogen Fuel Cell Vehicle Applications

Description: One related area of hydrogen fuel cell vehicle (FCV) development that cannot be overlooked is the anticipated requirement for new sensors for both the monitoring and control of the fuel cell's systems and for those devices that will be required for safety. Present day automobiles have dozens of sensors on-board including those for IC engine management/control, sensors for state-of-health monitoring/control of emissions systems, sensors for control of active safety systems, sensors for triggering passive safety systems, and sensors for more mundane tasks such as fluids level monitoring to name the more obvious. The number of sensors continues to grow every few years as a result of safety mandates but also in response to consumer demands for new conveniences and safety features. Some of these devices (e.g. yaw sensors for dynamic stability control systems or tire presure warning RF-based devices) may be used on fuel cell vehicles without any modification. However the use of hydrogen as a fuel will dictate the development of completely new technologies for such requirements as the detection of hydrogen leaks, sensors and systems to continuously monitor hydrogen fuel purity and protect the fuel cell stack from poisoning, and for the important, yet often taken for granted, tasks such as determining the state of charge of the hydrogen fuel storage and delivery system. Two such sensors that rely on different transduction mechanisms will be highlighted in this presentation. The first is an electrochemical device for monitoring hydrogen levels in air. The other technology covered in this work, is an acoustic-based approach to determine the state of charge of a hydride storage system.
Date: January 6, 2010
Creator: Brosha, E L; Sekhar, P K; Mukundan, R; Williamson, T; Garzon, F H; Woo, L Y et al.
Partner: UNT Libraries Government Documents Department