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BACKGROUND There exists no instrument specifically designed to measure comprehensively the needs of older people with mental disorders. AIM To develop such an instrument which would take account of patients', staff and careers' views on needs. METHOD Following an extensive development process, the assessment instrument was subjected to a test-retest and(More)
Airport surface congestion results in significant increases in taxi times, fuel burn and emissions at major airports. This paper describes the field tests of a congestion control strategy at Boston Logan International Airport. The approach determines a suggested rate to meter pushbacks from the gate, in order to prevent the airport surface from entering(More)
Modeling aircraft taxi operations is an important element in understanding current airport performance and where opportunities may lie for improvements. A statistical learning approach to modeling aircraft taxi time is presented in this paper. This approach allows efficient identification of relatively simple and easily interpretable models of aircraft taxi(More)
The FAA, carrier airlines and passengers are all familiar with the inefficiencies and costs that result from delays in the air transportation system. A significant portion of the delays are associated with operations on or near the surface of major airports. There continues to be keen interest in improving efficiency of surface operations in order to reduce(More)
Philadelphia International Airport are used to illustrate the diversity in operating environments. The paper then proposes techniques for characterizing airport surface operations using site surveys and operational data. Finally, it shows how these characterizations can be used for the adaptation of a given congestion management approach to different(More)
Advanced separation assurance concepts involving higher degrees of automation must meet the challenge of maintaining safety in the presence of inevitable subsystem faults, including the complete failure of the supporting automation infrastructure. This paper examines the types of design features and safeguards that might be used to preserve safety in a(More)
BACKGROUND Individual assessment of needs has been recognised as the most appropriate way to allocate health and social care resources. These assessments, however, are often made by the staff or by a carer who acts as an advocate for the user themselves. Little is known about how these proxy measures compare to how individual patients perceive their own(More)
This document is disseminated under the sponsorship of the Department of Transportation, Federal Aviation Administration, in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. Accurate wind information is required to support some of the key applications envisioned for future air traffic(More)