نتایج جستجو برای: air traffic

تعداد نتایج: 295603  

2005
Rahul A. Panicker Nikhil Nigam Dev Rajnarayan

Existing Air Traffic Control (ATC) procedures rely completely on human supervision and control. However, with the burgeoning traffic demands, it has become necessary to find options for automated (and possibly decentralized) traffic control. In particular, the problem of aircraft collision avoidance is of great interest. However, current approaches, [1] [2], are either computationally intensive...

2009
K. H. klein Tank

Currently, vehicles use safety systems like airbags or seat belts to increase the traffic safety of passengers during traffic accidents. In the near future, most new vehicles will be equipped with other type of traffic safety applications, which could prevent vehicles from e.g., traffic accident crashing. The purpose of this paper is to provide an overview of these future traffic safety applica...

2014
Sarala Shirabadagi Ravindra S. Hegadi

Traffic congestion has been increasing because of increased population growth mainly in major cities due to urbanization. Traffic congestion causes increased air pollution, travel time and mostly traffic accidents; therefore we need an efficient traffic management system. Today most of the cities of the world have intelligent transport system which is equipped with electronics devices to commun...

2002
Victor H. L. Cheng David C. Foyle

In view of the ever-increasing air traffic, much attention in air-traffic-management research has been given to improving arrival and departure efficiency. As air traffic begins and ends at the airport, the issues of taxi delays and ground-operation incursions become more pressing. This paper considers the surface-traffic problem at major airports and envisions a collaborative traffic and aircr...

2001
P Leal de Matos B Chen RJ Ormerod

This paper focuses on the usability of optimisation models to support the re-routing of air traffic flows in Europe. It discusses different modelling approaches and proposes three integer programming models, with different levels of detail, aimed at re-routing air traffic flows. The models are tested on a set of test data based on the actual traffic crossing the whole French upper airspace. The...

2014
Wen Qi Gan Ryan W Allen Michael Brauer Hugh W Davies G B John Mancini Scott A Lear

OBJECTIVES Epidemiological studies have demonstrated associations between long-term exposure to traffic-related air pollution and coronary heart disease (CHD). Atherosclerosis is the principal pathological process responsible for CHD events, but effects of traffic-related air pollution on progression of atherosclerosis are not clear. This study aimed to investigate associations between long-ter...

2009
Thomas Z. Strybel Katsumi Minakata Jimmy H. Nguyen Russell Pierce Kim-Phuong L. Vu

We examined the effectiveness of situation awareness probe questions in predicting sector performance and behavior in a human-in-the-loop simulation air traffic management (ATM) simulation with low (50%) and high (75%) traffic densities. Probes were presented online during the performance of the air traffic management task, and the accuracy and response latencies were measured. Hierarchical lin...

2013
Christiane Edinger Angela R. Schmitt

Technical systems tend to undergo changes and thus will sooner or later require adjustments to new requirements or conditions. Currently, major changes in Air Traffic Management (ATM) are on the way, as ATM modernizations programs like SESAR or NextGen are getting momentum. ATM systems are rather complex and pose high demands on safety. Besides safety, other performance parameters like efficien...

2013
Cailiang Zhou Nour Baïz Tuohong Zhang Soutrik Banerjee Isabella Annesi-Maesano

BACKGROUND Studies have shown diverse strength of evidence for the associations between air pollutants and childhood asthma, but these associations have scarcely been documented in the early life. The purpose of this study was to evaluate the impacts of various air pollutants on the development of asthma phenotypes in the first year of life. METHODS Adjusted odds ratios were estimated to asse...

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