المؤلفون: Navazio, Lisa¹, Romanin-Jacur, Giorgio¹

المصدر: Transportation Science. Aug98, Vol. 32 Issue 3, p268. 9p.

مصطلحات موضوعية: *AIR traffic control, *AIR travel, *AIRLINE industry, *AIRPORTS, TRANSPORTATION planning, TRAFFIC congestion, FLIGHT

مستخلص: In recent years air traffic has dramatically increased without a corresponding development of airports. Therefore, airports' limited capacity causes air traffic congestion and consequent expensive delays. The only strategy that can be applied in the short term with low investments aims at the optimal management of present resources; its principal device is Ground Holding, which consists of delaying an aircraft take off whenever it is foreseen it will not land in time because of congestion. We consider a traffic situation with "multiple connections" or "banking," i.e., the situation where some flights are assigned a set of "preceding" flights; no "successive" flight can start until all its preceding flights have landed, The problem consists of distributing delays to flights, so as to minimize the total delay cost, by respecting airport capacity, connections, and time constraints imposed by airlines. We construct an integer linear programming model and we solve it to optimality with CPLEX. Because the computation time is too high (hours) for real-world instances, we propose an alternative heuristic algorithm, which shows a very low computation time (seconds) and acceptable errors when tested on 30 realistic instances with strongly diversified data. [ABSTRACT FROM AUTHOR]

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المصدر: Business Traveller (UK/Europe Edition). Sep/Oct2021, p65-65. 1p. 7 Color Photographs, 1 Black and White Photograph.

مصطلحات موضوعية: *AIR travel, *AIR traffic control, *POLICE, *AIR pilots, FLIGHT

المؤلفون: Wilkes, William (AUTHOR), Weiss, Richard (AUTHOR)

المصدر: Bloomberg.com. 12/19/2019, pN.PAG-N.PAG. 1p.

مصطلحات موضوعية: *AIR travel, *AIR traffic control, FLIGHT, SHAME

مستخلص: (Bloomberg) -- Mounting concern about carbon emissions may be altering travel habits in Europe's largest economy as figures from German airports show a steady decline in passengers taking domestic flights. The German trends replicate those seen in Sweden, where airport operator Swedavia AB reported in April that passenger numbers had dropped for seven consecutive months, just as state rail operator SJ posted record figures. Deutsche Bahn reckons annual passenger numbers on long-distance trains will reach 260 million by 2040, almost double the 2015 total, while Austrian's state railway operator is adding night-train capacity in expectation of rising demand. [Extracted from the article]

: Copyright of Bloomberg.com is the property of Bloomberg, L.P. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Schuster, Wolfgang, Ochieng, Washington

المصدر: Journal of Navigation; 04/01/2011, Vol. 64 Issue 2, p281-294, 14p

مصطلحات موضوعية: AERONAUTICAL navigation, COMMERCIAL aeronautics, CRITICAL analysis, AIR travel, FLIGHT, AIR traffic control, AIRPORT management

مستخلص: The CNS/ATM concept envisages reliance on global satellite navigation systems to underpin future air traffic management that is able to cope with the ever-increasing demand for air travel without jeopardising safety and the environment. In order to benefit from GNSS, it is crucial that the navigation performance required of air navigation systems is derived and agreed, based on sound principles. Significant work has been undertaken to date and agreement reached on the navigation requirements for the phases of flight up to Category I (CAT-I) precision approach, and proposals are under discussion for CAT-III precision approach. This paper completes a typical flight profile by addressing airport surface movement, and proposing the requirements based on operational requirements for each airport category, to support operations in zero visibility conditions. The benefits of the approach taken in the derivation of the requirements are discussed relative to the existing navigation requirements. [ABSTRACT FROM AUTHOR]

: Copyright of Journal of Navigation is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Ball, Michael O., Hoffman, Robert, Mukherjee, Avijit

المصدر: Transportation Science; Feb2010, Vol. 44 Issue 1, p1-14, 14p, 5 Diagrams, 5 Graphs

مصطلحات موضوعية: AIR traffic capacity, AIR traffic control, AERONAUTICAL safety measures, STOCHASTIC programming, ASSIGNMENT problems (Programming), TRANSPORTATION problems (Programming), FLIGHT, AIRPORTS, AIR travel

مستخلص: This paper presents ration-by-distance (RBD), a new allocation method to be used in planning ground delay programs (GDPs) for traffic flow management. It is shown that RBD minimizes total expected delay, under certain assumptions related to the manner in which GDPs are dynamically controlled. On the other hand, RBD taken to the extreme has poor characteristics with respect to the equity of the allocation it produces. To address this issue, we propose a constrained version of RBD as a practical alternative to allocation procedures used in operations today. It is shown that this algorithm has superior overall performance in terms of efficiency and equity relative to existing procedures. [ABSTRACT FROM AUTHOR]

: Copyright of Transportation Science is the property of INFORMS: Institute for Operations Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Ellis, James E.

المصدر: BusinessWeek; 1/15/90, Issue 3141, p55-55, 1/2p, 1 Color Photograph

مصطلحات موضوعية: MERGERS & acquisitions, AIR traffic control, FLIGHT, AIR travel

الشركة/الكيان: UNITED Airlines Inc., PAN American World Airways Inc.

مستخلص: Reports how in an industry ravaged by merger mania, United Airlines Inc.'s $750 million purchase of the Pacific Division of Pan American World Airways Inc., also known as Pan Am in 1986 stands out as a star. Decline in domestic traffic since 1988; Information on Pan Am's $874 million purchase of National Airlines Inc.; Use of National airlines Inc.'s domestic system by Pan Am to feed its international flights.

المؤلفون: Lopez, Ramon

المصدر: Aviation Today's Daily Brief; 12/4/2009, p2-2, 1p

مصطلحات موضوعية: FLIGHT training, AIR travel, AIR traffic control, INSTRUMENT landing systems, FLIGHT, BUSINESS cycles

مصطلحات جغرافية: ASIA

مستخلص: The article examines the pilot training market in the Asia Pacific. The demand for pilots reportedly declined due to the decline in air travel that was caused by the economic downturn. However, it is stressed that the local air traffic management systems have inadequate approach instrument landing systems and support for training requirements. Moreover, training institutions are investing in expanding their infrastructure and facilities while simulation spending and reduction of flight hours are increasing despite the economic conditions.