848 resultados para San Francisco Bay
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General note: Title and date provided by Bettye Lane.
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General note: Title and date provided by Bettye Lane.
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Inscriptions: Verso: [stamped] Credit must be given to Leinwand from Monkmeyer Press Photo Service].
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Inscriptions: Verso: [stamped] Photograph by Freda Leinwand. [463 West Street, Studio 229G, New York, NY 10014].
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Inscriptions: Verso: [stamped] Credit must be given to Leinwand from Monkmeyer Press Photo Service].
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Inscriptions: Verso: [stamped] Photograph by Freda Leinwand. [463 West Street, Studio 229G, New York, NY 10014].
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Inscriptions: Verso: [stamped] Credit must be given to Leinwand from Monkmeyer Press Photo Service].
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Inscriptions: Verso: [stamped] Credit must be given to Leinwand from Monkmeyer Press Photo Service].
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Fil: Moreno, José Eduardo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.
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Fil: Moreno, José Eduardo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.
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Fil: Moreno, José Eduardo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.
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Ground Delay Programs (GDP) are sometimes cancelled before their initial planned duration and for this reason aircraft are delayed when it is no longer needed. Recovering this delay usually leads to extra fuel consumption, since the aircraft will typically depart after having absorbed on ground their assigned delay and, therefore, they will need to cruise at more fuel consuming speeds. Past research has proposed speed reduction strategy aiming at splitting the GDP-assigned delay between ground and airborne delay, while using the same fuel as in nominal conditions. Being airborne earlier, an aircraft can speed up to nominal cruise speed and recover part of the GDP delay without incurring extra fuel consumption if the GDP is cancelled earlier than planned. In this paper, all GDP initiatives that occurred in San Francisco International Airport during 2006 are studied and characterised by a K-means algorithm into three different clusters. The centroids for these three clusters have been used to simulate three different GDPs at the airport by using a realistic set of inbound traffic and the Future Air Traffic Management Concepts Evaluation Tool (FACET). The amount of delay that can be recovered using this cruise speed reduction technique, as a function of the GDP cancellation time, has been computed and compared with the delay recovered with the current concept of operations. Simulations have been conducted in calm wind situation and without considering a radius of exemption. Results indicate that when aircraft depart early and fly at the slower speed they can recover additional delays, compared to current operations where all delays are absorbed prior to take-off, in the event the GDP cancels early. There is a variability of extra delay recovered, being more significant, in relative terms, for those GDPs with a relatively low amount of demand exceeding the airport capacity.
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[Excerpt] In late January, first-year students in the Baker Program in Real Estate attended the first annual domestic real estate trek as part of the program’s newly revised curriculum. For this inaugural trip, students visited San Francisco and Silicon Valley, two of the nation’s most active real estate markets.
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Programa de doctorado: Historiografía, Fuentes y Métodos de la Investigación Histórica. La fecha de publicación es la fecha de lectura
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Sammelrezension von: 1. Edward W. Taylor / Patricia Cranton, and Associates (Hrsg.): The Handbook of Transformative Learning, Theory, Research, and Practice, San Francisco, CA: Jossey-Bass 2012 (598 S.; ISBN 978-1-111-21891-4) 2. Jack Mezirow / Edward W. Taylor, and Associates (Hrsg.): Transformative Learning in Practice, Insights from Community, Workplace, and Higher Education, San Francisco, CA: Jossey-Bass 2009 (303 S.; ISBN 978-0-470-25790-6)