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Showing 201 - 220 of 596 results
  • Potential Impacts of Supersonic Aircraft Emissions on Ozone and Resulting Forcing on Climate An Update on Historical Analysis
    Potential Impacts of Supersonic Aircraft Emissions on Ozone and Resulting Forcing on Climate: An Update on Historical Analysis
    Zhang, Jun ;
    Wuebbles, Donald J.
    2021-02-01 | PDF
    Commercial aircraft flying at supersonic speeds in the lower stratosphere are being discussed once again after a hiatus of almost 20 years. Potential environmental effects from fleets of such aircraft need to be understood for their possible impacts on stratospheric ozone; levels of stratospheric ozone determine the amount of biologically harmful u ...
  • Reduced Order Modeling Methods for Aviation Noise Estimation
    Reduced Order Modeling Methods for Aviation Noise Estimation
    Behere, Ameya ;
    Rajaram, Dushhyanth
    2021-01-01 | PDF
    A key enabler for sustainable growth of aviation is the mitigation of adverse environmental effects. One area of concern is community noise exposure at large hub airports serving growing population centers. Traditionally, community noise exposure is computed using noise contours around airports, which requires knowledge of a large dataset pertainin ...
  • FAA Aerospace Forecast Fiscal Years 20212041
    FAA Aerospace Forecast: Fiscal Years 2021-2041
    United States. Department of Transportation. Federal Aviation Administration
    2021-01-01 | PDF
    The FAA Aerospace Forecasts are developed to support budget and planning needs of the FAA. The forecasts are developed using statistical models to explain and incorporate emerging trends of the different segments of the aviation industry.
  • Technological Progress in US Agriculture Implications for Biofuel Production
    Technological Progress in US Agriculture: Implications for Biofuel Production
    Taheripour, Farzad ;
    Scott, Don
    2021-01-01 | PDF
    This paper evaluates in a holistic way major trends in US production of food, feed, and biofuel commodities over the period 1961 to 2014. It is motivated by literature that examines parts of the changes but does not integrate them. We develop a comprehensive data set and then conduct analysis of the major trends that emerge. We identify eight major ...
  • Sustainable Aviation Fuel Prescreening Tools and Procedures
    Sustainable Aviation Fuel Prescreening Tools and Procedures
    Heyne, Joshua ;
    Rauch, Bastian
    2020-12-01 | PDF
    This paper outlines the benefits and procedures for prescreening Sustainable Aviation Fuel (SAF) candidates before entering the official ASTM D4054 evaluation process. Specific properties are identified, that if not met, may result in extensive and costly efforts to correct if not recognized until later in the fuel development process. Hence, an ap ...
  • Project 029A National Jet Fuel Combustion Program Area 5 Atomization Test and Models Final Report
    Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report
    Lucht, Robert P. ;
    Gore, Jay P.
    2020-12-01 | PDF
    The objectives of this project, as stated in the Invitation for ASCENT COE Notice of Intent (COE-2014-29), are to “measure the spray characteristics of the nozzles used in the Referee Combustor used in Area 6 tests and to develop models for characterizing the atomization and vaporization of the reference fuels.” We conducted experiments within the ...
  • Impact of Government Subsidies on a Cellulosic Biofuel Sector with Diverse Risk Preferences Toward Feedstock Uncertainty
    Impact of Government Subsidies on a Cellulosic Biofuel Sector with Diverse Risk Preferences Toward Feedstock Uncertainty
    Sharma, Bijay P ;
    Yu, T Edward
    2020-11-01 | PDF
    Investment risk and uncertainty about the availability of biomass feedstock hinders the development of a mature cellulosic biofuel sector. The Biomass Crop Assistance Program (BCAP) is a federal program designed to subsidize farmers to establish, produce and deliver biomass feedstock to biorefineries. This study evaluated the impacts of BCAP on the ...
    Supporting Files
  • Development of NAS Wide and Global Rapid Aviation Air Quality Tools - 20 [supporting datasets]
    Barrett, Steven R.H. ;
    Speth, Raymond
    2020-10-15 | ZIP
    This dataset defines the uncertainty bounds for Tables SI.13-SI.18 in the paper, by including the full Monte Carlo simulation output data. A CSV file is provided for each column in Table SI.13 to Table SI.18 in the paper. The CSV files include the ordered members of the Monte Carlo simulation, for instance the first row of each CSV file corresponds ...
    Dataset Supporting Files
  • Outdoor Home Gardener Preferences for Environmental Attributes in Gardening Supplies and Use of Ecofriendly Gardening Practices
    Outdoor Home Gardener Preferences for Environmental Attributes in Gardening Supplies and Use of Ecofriendly Gardening Practices
    Thomas, McKenzie ;
    Jensen, Kimberly L
    2020-10-01 | PDF
    Home gardeners’ concerns for the environment are expressed both in the ecofriendly gardening practices they use and in environmental attributes they prefer in the gardening products they purchase. This study uses data from a 2018 survey of 601 Tennessee outdoor home gardeners and a multiple indicators multiple causes (MIMIC) model to illustrate how ...
    Supporting Files
  • Development of NAS Wide and Global Rapid Aviation Air Quality Tools 20
    Development of NAS Wide and Global Rapid Aviation Air Quality Tools - 20
    Barrett, Steven R.H. ;
    Speth, Raymond
    2020-10-01 | PDF
    The project developed tools that enable rapid assessment of National Airspace System (NAS) wide and global impacts of aviation emissions on aviation-attributable particulate matter (PM), ozone, and resultant health outcomes for different policy scenarios. The adjoint method, which the tools are based on, provides a computationally efficient way of ...
  • ATC Signaling Systems A Review of the Literature on Alarms Alerts and Warnings
    ATC Signaling Systems: A Review of the Literature on Alarms, Alerts, and Warnings
    Ruskin, Keith J ;
    Rice, Stephen
    2020-09-01 | PDF
    The Federal Aviation Administration’s air traffic control organization encompasses a variety of facilities that include towers, terminal radar approach control facilities (TRACONs), and air route traffic control centers (ARTCCs). ATO facilities are dynamic environments that require rapid decision making to manage rapidly evolving situations. Contro ...
  • Guidance for Data Dictionary for Medical Analysis Tracking System
    Guidance for Data Dictionary for Medical Analysis Tracking System
    Hunn, Heather ;
    Hileman, Christy
    2020-07-21 | PDF
    This guidance has been written to ensure that aviation accidents and autopsy data supports the meaningful evaluation of airmen’s medical certification, autopsy, and toxicology records in an effort to identify aeromedical hazards; and that these data are structured and maintained with standardized quality control mechanisms.
  • Tennessee Consumer Willingness to Pay for Disposable Dinnerware Molded from Wheat Straw
    Tennessee Consumer Willingness to Pay for Disposable Dinnerware Molded from Wheat Straw
    Gill, MacKenzie B ;
    Jensen, Kimberly L
    2020-07-01 | PDF
    Wheat straw, a wheat byproduct, can be used in making disposable dinnerware. This study uses a contingent valuation survey to measure consumer willingness to pay (WTP) for wheat straw dinnerware bowls (WSB). Consumers would pay a premium ($1.33) for a 25-count package of molded WSB over the same size package of conventional bowls. Target markets in ...
    Supporting Files
  • Alaska Accidents Fatigue
    Alaska Accidents & Fatigue
    United States. Department of Transportation. Federal Aviation Administration. Office of Aviation. Civil Aerospace Medical Institute
    2020-06-18 | Aeromedical Safety Brochures | PDF
    Aeromedical Safety Brochures are prepared for general aviation pilots, commercial pilots and physicians. The brochures acquaint the aviation community with the physiological challenges of the aviation environment and relevant safety concerns.
  • Systems Analysis of Community Noise Impacts of Advanced Flight Procedures for Conventional and Hybrid Electric Aircraft
    Systems Analysis of Community Noise Impacts of Advanced Flight Procedures for Conventional and Hybrid Electric Aircraft
    Thomas, Jacqueline ;
    Hansman, R. John
    2020-06-01 | PDF
    Recent changes to aircraft approach and departure procedures enabled by more precise navigation technologies have created noise concentration problems for communities beneath flight tracks. There may be opportunities to reduce community noise impacts under these concentrated flight tracks through advanced operational approach and departure procedur ...
  • AEDT Version 3c Installation Manual
    AEDT Version 3c [Installation Manual]
    United States. Department of Transportation. Federal Aviation Administration
    2020-06-01 | PDF
    This document provides detailed instructions on how to install and run AEDT 3c. It is important to follow the installation instructions in the order listed below, as Microsoft SQL Server is a prerequisite for AEDT 3c. Installation components must run locally. 1. Install Microsoft SQL Server 2012 or SQL Server 2017 2. Install AEDT 3c To install soft ...
  • Fatigue in Aviation 2020
    Fatigue in Aviation [2020]
    United States. Department of Transportation. Federal Aviation Administration. Office of Aviation. Civil Aerospace Medical Institute
    2020-04-29 | Aeromedical Safety Brochures | PDF
    Aeromedical Safety Brochures are prepared for general aviation pilots, commercial pilots and physicians. The brochures acquaint the aviation community with the physiological challenges of the aviation environment and relevant safety concerns.
  • Evaluation of the Impact of Transport Jet Aircraft Approach and Departure Speed on Community Noise
    Evaluation of the Impact of Transport Jet Aircraft Approach and Departure Speed on Community Noise
    Hansman, R. John ;
    Thomas, Jacqueline
    2020-04-01 | PDF
    This report evaluates the impact of changing aircraft speed during approach and departure on community noise for transport category jet aircraft. This analysis is part of a broader study investigating the opportunities to modify approach and departure procedures to reduce community noise impact. This report also addresses a requirement in Section 1 ...
  • Project 043 NoisePowerDistance Reevaluation
    Project 043 Noise–Power–Distance Reevaluation
    Mavris, Dimitri N. ;
    Kirby, Michelle
    2020-03-28 | PDF
    The standard technique for evaluating fleet noise is to estimate the flight procedure source noise by using noise–power–distance (NPD) curves. Noise calculations within the Aviation Environmental Design Tool (AEDT) rely on NPD curves provided by aircraft manufacturers. This dataset reflects representative aircraft categories at set power levels and ...
  • AEDT Version 3c User Manual
    AEDT Version 3c [User Manual]
    Lee, Cynthia ;
    Thrasher, Ted
    2020-03-04 | PDF
    The Federal Aviation Administration, Office of Environment and Energy (FAA-AEE) has developed the Aviation Environmental Design Tool (AEDT) version 3c software system with the support of the following development team: FAA, National Aeronautics and Space Administration (NASA), U.S. DOT Volpe National Transportation Systems Center (Volpe Center), AT ...
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