Browsing Department of Aeronautics and Astronautics by Title
Now showing items 478-497 of 503
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The U.S. aviation system to the year 2000
(Cambridge : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1982], 1982)Introduction: 1.1 The Future of the Aviation System. It is nothing if not presumptuous to look ahead twenty years in any phase of human activity. This seems particularly true in civil aviation where the certificated airlines ... -
A UAV Mission Hierarchy
(MIT Humans and Automation Laboratory, 2006)In the following sections, each of the primary missions are decomposed into mission planning, management, and replanning segments in order to identify what the primary functions a human operator will need to perform. The ... -
Unconventional blade design for compressors
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1969], 1969)One of the factors causing the low efficiency of axial flow compressors operating at decreased flow rates is the flow separation at blade extremities. To postpone this tendency to separate to lower flow rates, compressor ... -
Uniform-inlet three-dimensional transonic Beltrami flow through a ducted fan
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, [1977], 1977)Introduction: This report is a continuation of a line of analytical treatment of three dimensional flows in compressor or ducted fans. In the earlier theories [1,2,9,10], the blade row is modelled as a set of spinning ... -
Unloved Aerial Vehicles: Gutting its UAV plan, the Air Force sets a course for irrelevance
(Armed Forces Journal, 2012-11)This month's cover article challenges Air Force leader on the subject of unmanned aerial vehicles. Lt. Col. Lawrence Spinetta and Missy Cummings see disaster, or at least a long-term slide into irrelevance, in recent ... -
UNSFLO : a numerical method for the calculation of unsteady flow in turbomachinery
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1991], 1991)Introduction: There are four principal sources of unsteadiness in a single stage of a turbomachine in which there is one row of stationary blades (stators) and one row of moving blades (rotors). As shown in Fig. 1.1, ... -
UNSFLO : a numerical method for unsteady inviscid flow in turbomachinery
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, 1988, 1988)Introduction: There are four principal sources of unsteadiness in a single stage of a turbomachine in which there is one row of stationary blades (stators) and one row of moving blades (rotors). As shown in Fig. 1.1, ... -
Unsteady radial transport in a transonic compressor stage
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1989], 1989)A technique, based on the operation of a dual-hot wire-aspirating probe with frequency response of at least 18 kHz and uncertainty less than 0.005 to full scale in mass fraction units, has been developed to measure time ... -
Upstream history and apparent stress in turbulent boundary layers
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, [1966], 1966)A comprehensive experimental and analytical study specifically designed to investigate upstream history and apparent stresses in incompressible, two-dimensional, turbulent boundary layers has been conducted. Hot-wire ... -
Use of Loran-C for general aviation aircraft navigation
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1981], 1981)This report describes an extensive evaluation of Loran-C for use by general aviation. Flight, ground, and antenna tests were done. Flight tests measured the accuracy and the ability to make approaches. Receiver reliability ... -
User charges in international air transportation
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1979], 1979)The charges dealt with here are those paid by international airline operators for the use of airports and airways. At airports, there are charges for landings and takeoffs and various fees or rentals for other facilities ... -
Using Discrete Event Simulation to Model Multi-Robot Multi-Operator Teamwork
(Human Factors and Ergonomics Society, 2012-10)With the increasing need for teams of operators in controlling multiple robots, it is important to understand how to construct the team and support team processes. While running experiments can be time consuming and ... -
Using Support Vector Machines and Bayesian Filtering for Classifying Agent Intentions at Road Intersections
(2009-09-15)Classifying other agents’ intentions is a very complex task but it can be very essential in assisting (autonomous or human) agents in navigating safely in dynamic and possibly hostile environments. This paper introduces a ... -
Using the Galileo Solid-State Imaging Instrument as a Sensor of Jovian Energetic Electrons
(2018-04-16)We quantitatively describe the Jovian energetic electron environment using the Solid State Imager (SSI) on the Galileo spacecraft. We post-process raw SSI images by removing the target object and dark current to obtain ... -
Using Variable-Rate Alerting to Counter Boredom in Human Supervisory Control
(HFES, 2012-10)A low task load, long duration experiment was conducted to evaluate the impact of cyclical attention switching strategies on operator performance in supervisory domains. The impetus for such a study stems from the lack ... -
The value of revenue management innovation in a competitive airline industry
(Cambridge, MA : [Massachusetts Institute of Technology], Flight Transportation Laboratory, [1995], 1995)The value of revenue management to the airlines has been amply demonstrated, both by industry experience and in simulation studies of the reservation process. However, there have been no attempts to determine if the benefits ... -
Vehicle routing and scheduling for the ultra short haul transportation system
(Cambridge, Mass. : Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, Flight Transportation Laboratory, 1979, 1979)A method of vehicle routing and scheduling for an air based intraurban transportation system is developed. The maximization of level of service to passengers in a system operating under time varying demand is considered ... -
Visualization of Three Dimensional CFD Results
(Computational Fluid Dynamics Laboratory, 1989-05-01)We have developed an interactive graphics system for the display of three dimensional CFD solutions on unstructured hexahedral grids. This system is implemented on a high-performance graphics supercomputer. Visualization ... -
Vortex decay in a conical diffuser
(Cambridge, Mass. : b Gas Turbine Laboratory, Massachusetts Institute of Technology, [1964], 1964)The behavior of vortex flow in a conical diffuser has been studied in this report. The flow considered here is a steady, incompressible, axially symmetric one. The present experimental investigation has resulted in the ... -
Wake behavior downstream of a transonic compressor rotor
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, 1974, 1974)Measurements of the static pressure resolved in radial and axial directions downstream of a transonic compressor rotor have been harmonically analyzed. The investigation is part of a program addressing the behavior of ...
