Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"National Airspace System (NAS)"”.
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Modeling of Airline and Passenger Dynamics in the National Airspace System (NAS)
… understand airline and passenger dynamics in the National Airspace System (NAS). Agent-based modeling is one of the most widely used modeling simulation-analysis approaches to understanding the dynamic behavior of complex systems. The usefulness of agent-based modeling has been demonstrated by …
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Small unmanned aircraft system integration into the Mode C Veil using an enterprise architecting framework
Integrating small unmanned aerial systems (sUAS) into the national airspace system (NAS) represents a challenging problem set that requires consideration through multiple lenses. Like most complex problems, considering one class of constraints is inadequate to developing a solution that satisfies …
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Airspace Integration of New Entrants and Safety Risk Management Models
<p><br /> In recent years, the demand for airspace access of Unmanned Aerial Systems (UAS) increased significantly and is continuously increasing for different altitude-types UAS. A similar evolution is expected from Commercial Space Operations (CSO) in the next years. These aviation/aerospace …
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Integrating military unmanned aircraft into the national airspace system : an application of value-focused thinking and enterprise architecting
… the challenge of integrating Unmanned Aircraft Systems (UAS) in the national airspace system (NAS). Thesis organization is sub-divided into four sections. Section I provides the introduction, context, and recent efforts of the UAS airspace integration challenge and the underlying motivations …
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Applying technology strategy with enterprise architecting : a case study in transformation planning for integrating Unmanned Aircraft Systems into the National Airspace
… solutions for integrating Unmanned Aircraft Systems (UAS) into the National Airspace System (NAS). The thesis is organized into four sections. Section 1 introduces the strategic background, enterprise description, definitions of key terms, and the issues and interest surrounding UAS …
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Benefits and incentives for ADS-B equipage in the National Airspace System
… that would increase the capacity of the National Airspace System (NAS) in the US. Certain forms of ADS-B also have the bandwidth to upload weather and airspace information into the cockpit. However, prior to achieving the benefits of ADS-B, operators must equip with the technology. In …
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A Modeling Framework to Estimate Airport Runway Capacity in the National Airspace System
… study is to estimate the airport capacity in the National Airspace System (NAS). Previous studies have focused on the airport capacity of large commercial airports. This research study estimates the runway capacity for more than two thousand airports in the NAS in order to understand future …
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Evaluating passenger delays in the US domestic air transportation system
A fundamental component of any National Airspace System (NAS) performance evaluation is the cost impact of air traffic delays, and more generally capacity limitations, on the traveling passengers. In previous research it has been conclusively shown that flight delay data and flight centric metrics …
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Application of data fusion and machine learning to the analysis of the relevancy of recommended flight reroutes
… is to maintain the safety and efficiency of the National Airspace System (NAS). One way to do so is through Traffic Management Initiatives (TMIs). TMIs, such as reroute advisories, are issued by Air Traffic Controllers whenever there is a need to balance demand with capacity in the National …
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The Effects of System Reliability and Time Pressure on Unoccupied Aircraft Systems Operator Performance and Mental Workload
<p>Unoccupied Aircraft Systems (UAS) are in the midst of aviation`s next generation. UAS are being utilized at an increasing rate by military and security operations and are becoming widely popular in usage from search and rescue and weather research to homeland security and border patrol. The …
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The Effects of System Reliability and Task Uncertainty on Unmanned Aerial Vehicle Operator Performance under High Time Pressure
… the value and versatility of Unmanned Aerial Systems (UAS). In the recent years, UASs have sparked the interest of other fields, and in the very near future, they will be introduced into the National Airspace System (NAS). With this inclusion come new concerns. Due to the future wide range …
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A Systemic Approach to Next Generation Infrastructure Data Elicitation and Planning Using Serious Gaming Methods
<p>Infrastructure systems are vital to the functioning of our society and economy. However, these systems are increasingly complex and are more interdependent than ever, making them difficult to manage. In order to respond to increasing demand, environmental concerns, and natural and man-made …
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Aviation Safety and Security: A Call for Educating the Flying Public
… security knowledge by the flying public in the National Airspace System (NAS). It discusses the confusion over both new (post 9-11-01) and old (pre 9-11-01) security regulations as well as basic passenger safety recommendations and advice that could possibly save hundreds of lives. It will …
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Delay characterization and prediction in major U.S. airline networks
… expands on models that predict delays within the National Airspace System (NAS) in the United States. We propose a new method to predict the expected behavior of the NAS throughout the course of an entire day after only a few flying hours have elapsed. We do so by using k-means clustering to …
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System analysis using automatic dependent surveillance broadcast (ABS-B) for closely spaced parallel approaches
The United States National Airspace System (NAS) is undergoing evolutionary changes in response to growing air traffic demands and aging equipment. In 1981 the Federal Aviation Administration initiated a modernization program to modernize, automate, and consolidate the existing ATC system by the …
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Characterization and prediction of air traffic delays
… a new model for predicting delays in the National Airspace System (NAS). The proposed model uses Random Forest (RF) algorithms, considering both temporal and network delay states as explanatory variables. In addition to local delay variables that describe the arrival or departure delay …
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Analysis of Potential Wake Turbulence Encounters in Current and NextGen Flight Operations
… successive aircraft can increase capacity in the National Airspace System (NAS) with corresponding savings in delay times. One of the main goals of the Wake Encounter Model (WEM) described in this thesis is to assess the outcome from future reduced separation criteria in the NAS. The model has …
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Airport Performance Metrics Analysis: Application to Terminal Airspace, Deicing, and Throughput
… assessing the operational performance of the National Airspace System (NAS), where they analyze trends in the aviation industry to help develop strategies for a more efficient air transportation system. To measure the performance of various elements of the aviation system, the FAA and the …
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A Study of Commercial Aviation Demand and Revenue Responses to Changes in Ticket and Segment Tax
… to find a tax structure that will support the National Airspace System (NAS) and maintain revenue neutrality, where taxes can be adjusted and the FAA can still attain the same revenue amount if taxes had not changed. Virginia Tech's role in the project is to analyze the effects of different tax …
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Analysis of airspace traffic structure and air traffic control techniques
… processes. Prior work has identified that the airspace structure, defined by the reference elements, procedural elements and pattern elements of the traffic, is important for abstraction and management of the traffic. This work explores in more detail this relationship between airspace …
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