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Office of Scientific & Technical Information Technical Reports
246
Congressional Research Service Reports
118
Texas Patents
41
Government Accountability Office Reports
35
Technical Report Archive and Image Library
33
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30
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19
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Panama: Political and Economic Conditions and U.S. Relations
This report discusses the current political and economic conditions in the country of Panama, which has made notable political and economic progress since the 1989 U.S. military intervention that ousted the regime of General Manuel Noriega from power. The United States has close relations with Panama, stemming in large part from the extensive linkages developed when the canal was under U.S. control. This report describes the U.S.-Panama relationship at length, including trade relations.
Date:
April 22, 2011
Creator:
Sullivan, Mark P.
Object Type:
Report
System:
The UNT Digital Library
State, Foreign Operations, and Related Programs: FY2011 Budget and Appropriations
This report analyzes the FY2012 request, recent-year funding trends, and congressional action related to FY2011 State-Foreign Operations legislation.
Date:
April 22, 2011
Creator:
Lawson, Marian Leonardo; Epstein, Susan B. & Resler, Tamara J.
Object Type:
Report
System:
The UNT Digital Library
Reducing the Budget Deficit: Policy Issues
This report addresses questions such as, how large are projected deficits under current policy? How much deficit reduction is necessary? How quickly should the deficit be reduced? The report also discusses policy options for deficit reduction.
Date:
April 22, 2011
Creator:
Labonte, Marc
Object Type:
Report
System:
The UNT Digital Library
Project BioShield: Authorities, Appropriations, Acquisitions, and Issues for Congress
This report discusses the Project BioShield Act (P.L. 108-276), In 2004, passed by Congress to encourage the private sector to develop medical countermeasures against chemical, biological, radiological, and nuclear (CBRN) terrorism agents and to provide a novel mechanism for federal acquisition of those newly developed countermeasures. This law provides three main authorities: (1) relaxing regulatory requirements for some CBRN terrorism-related spending, including hiring personnel and awarding research grants; (2) guaranteeing a federal market for new CBRN medical countermeasures; and (3) permitting emergency use of unapproved countermeasures.
Date:
April 22, 2011
Creator:
Gottron, Frank
Object Type:
Report
System:
The UNT Digital Library
Navy SSBN(X) Ballistic Missile Submarine Program: Background and Issues for Congress
This report discusses the Navy's plan to develop and design a class of 12 next-generation ballistic missile submarines, or SSBN(X)s, as replacements for the 14 Ohio class SSBNs currently in operation. The report explores certain related issues for Congress, including the affordability of the project and its potential impact on other Navy shipbuilding programs, alternatives to the program, and which shipyard or shipyards will build the proposed ships.
Date:
April 22, 2011
Creator:
O'Rourke, Ronald
Object Type:
Report
System:
The UNT Digital Library
Federal Register, Volume 76, Number 78, April 22, 2011, Pages 22603-22784
Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date:
April 22, 2011
Creator:
United States. Office of the Federal Register.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Federal Register, Volume 75, Number 77, April 22, 2010, Pages 20895-21154
Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date:
April 22, 2010
Creator:
United States. Office of the Federal Register.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Combustion of gaseous hydrogen at low pressures in a 35 degree sector of a 28-inch-diameter ramjet combustor
Report presenting testing of gaseous hydrogen fuel burned in a connected-pipe combustor with a cross section equal to 35 degrees sector of a 28-inch diameter. Eleven shrouded fuel-injector configurations were used to obtain combustion data at specified high-altitude ramjet combustor conditions. Results regarding shroud air blockage, mixing tabs, higher equivalence-ratio burning, injector size, flameholder durability, burner length, combustion efficiency, and temperature profile are provided.
Date:
April 22, 1958
Creator:
Kerslake, William R.
Object Type:
Report
System:
The UNT Digital Library
Flight Investigation of Pentaborane Fuel in 9.75-inch-diameter Ram-jet Engine With Downstream Fuel Injection
Flight investigation of pentaborane fuel in 9.75- inch-diameter ramjet engine with downstream fuel injection.
Date:
April 22, 1957
Creator:
Disher, John H. & Jones, Merle L.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of the Downwash at the Probable Tail Location Behind a High-Aspect-Ratio Wing in the Langley 8-Foot High-Speed Tunnel
Report presenting measurements downwash angles behind a model of a high-aspect-ratio wing at points near the probable tail location at Mach numbers up to 0.89 in the high-speed tunnel. The model has an NACA 65-210 section, an aspect ratio of 9.0, a taper ratio of 2.5:1, no twist, dihedral, or sweepback. Results regarding experimental data and comparison of experimental and calculated results are provided.
Date:
April 22, 1947
Creator:
Whitcomb, Richard T.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of Horizontal Tails 1: Unswept and 35 Degrees Swept-Back Plan Forms of Aspect Ratio 3
Memorandum presenting the results of a wind-tunnel investigation of the low-speed characteristics of horizontal tails of aspect ratio 3 with unswept and swept-back plan forms. Two models were tested which had identical areas, aspect ratio, taper ratio, and airfoil section, differing only in the angle of sweepback and elevator area ratios. The major effect of sweepback was to increase the rate of change of hinge-moment coefficient with angle of attack, to reduce the rate of change with elevator deflection, and to reduce the elevator effectiveness.
Date:
April 22, 1948
Creator:
Dods, Jules B., Jr.
Object Type:
Report
System:
The UNT Digital Library
Drag characteristics of rectangular and swept-back NACA 65-009 airfoils having various aspect ratios as determined by flight tests at supersonic speeds
Report presenting tests to determine the effect of sweepback angle and aspect ratio on the drag at supersonic speeds of wings of NACA 65-009 airfoil section. The current report is part of a bigger investigation and includes results for aspect ratios of 3.8 and 5.0. Results regarding the drag coefficient and general effect of aspect ratio are provided.
Date:
April 22, 1947
Creator:
Tucker, Warren A. & Nelson, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Vibration of turbine blades in a turbojet engine during operation
Report presenting an experimental investigation to determine the vibration phenomena that occur in turbine blades of a typical jet-propulsion engine during service operation; high-temperature strain gages were used to measure the turbine-blade vibrations. Results regarding modes of vibration, centrifugal stresses, and vibration of turbine blades during operation are provided.
Date:
April 22, 1948
Creator:
Morgan, W. C.; Kemp, R. H. & Manson, S. S.
Object Type:
Report
System:
The UNT Digital Library
Correlation of the Trim Limits of Stability Obtained for a PB2Y-3 Flying Boat and a 1/8-Size Powered Dynamic Model
Tests of a PB2Y-3 flying boat were made at the U.S. Naval Air Station, Patuxent River, Md., to determine its hydrodynamic trim limits of stability. Corresponding tests were also made of a 1/8-size powered dynamic model of the same flying boat in Langley tank no. 1. During the tank tests, the full-size testing procedure was reproduced as closely as possible in order to obtain data for a direct correlation of the results. As a nominal gross load of 66,000 pounds, the lower trim limits of the full-size and model were in good agreement above a speed of 80 feet per second. As the speed decreased below 80 feet per second, the difference between the model trim limits and full-scale trim limits gradually became larger. The upper trim limit of the model with flaps deflected 0 deg was higher than that of the full-size, but the difference was small over the speed range compared. At flap deflections greater than 0 deg, it was not possible to trim either the model of the airplane to the upper limit with the center of gravity at 28 percent of the mean aerodynamic chord. The decrease in the lower trim limits with increase in flap …
Date:
April 22, 1947
Creator:
Garrison, Charlie C.; Goldenbaum, David M. & Hacskaylo, Andrew
Object Type:
Report
System:
The UNT Digital Library
An Evaluation of the Roll-Rate Stabilization System of the Sidewinder Missile at Mach Numbers from 0.9 to 2.3
"A linear stability analysis and flight-test investigation has been performed on a rolleron-type roll-rate stabilization system for a canard-type missile configuration through a Mach number range from 0.9 to 2.3. This type damper provides roll damping by the action of gyro-actuated uncoupled wing-tip ailerons. A dynamic roll instability predicted by the analysis was confirmed by flight testing and was subsequently eliminated by the introduction of control-surface damping about the rolleron hinge line" (p. 1).
Date:
April 22, 1955
Creator:
Nason, Martin L.; Brown, Clarence A., Jr. & Rock, Rupert S.
Object Type:
Report
System:
The UNT Digital Library
Flight investigation of pentaborane fuel in 9.75-inch-diameter ram-jet engine with downstream fuel injection
Report presenting a flight test of pentaborane fuel in an air-launched ramjet engine with a design free-stream Mach number of 1.8. The ramjet used in the investigation had a revised spray bar-flameholder configuration. Results regarding propulsive thrust and propulsive-thrust specific fuel consumption are provided.
Date:
April 22, 1957
Creator:
Disher, John H. & Jones, Merle L.
Object Type:
Report
System:
The UNT Digital Library
Stability Results Obtained With Douglas D-558-1 Airplane (BuAero No. 37971) in Flight Up to a Mach Number of 0.89
Memorandum presenting measurements of some of the high-speed characteristics of the D-558-1 airplane up to Mach number 0.89. The results of the tests showed that the stabilizer incidence drastically affected the longitudinal trim characteristics above a Mach number of 0.80.
Date:
April 22, 1949
Creator:
Barlow, William H. & Lilly, Howard C.
Object Type:
Report
System:
The UNT Digital Library
Dynamic Stability and Control Characteristics of a Ducted-Fan Model in Hovering Flight
Report presenting the results of an experimental investigation of the dynamic stability and control of a simple ducted-fan model in hovering flight in order to provide basic information on the stability and control of jet vertically rising airplanes in hovering flight. The investigation primarily consisted of flight tests with the model hovering at altitude and near the ground.
Date:
April 22, 1954
Creator:
Kirby, Robert H.
Object Type:
Report
System:
The UNT Digital Library
Experimental Effects of Propulsive Jets and Afterbody Configurations on the Zero-Lift Drag of Bodies of Revolution at a Mach Number of 1.59
The present investigation was made at a free-stream Mach number of 1.59 to compare the afterbody drags to a series of conical boattailed models at zero angle of attack. Afterbody drags were obtained for both the power-off and the power-on conditions. Power-on drags were obtained as a function of afterbody fineness ratio, jet pressure ratio and divergence, and jet Mach number.
Date:
April 22, 1954
Creator:
de Moraes, Carlos A. & Nowitzky, Albin M.
Object Type:
Report
System:
The UNT Digital Library
The problem of cooling an air-cooled cylinder on an aircraft engine
An analysis of the cooling problem has been to show by what means the cooling of an air-cooled aircraft engine may be improved. Each means of improving cooling is analyzed on the basis of effectiveness in cooling with respect to power for cooling. The altitude problem is analyzed for both supercharged and unsupercharged engines. The case of ground cooling is also discussed. The heat-transfer process from the hot gases to the cylinder wall is discussed on the basis of the fundamentals of heat transfer and thermodynamics. Adiabatic air-temperature rise at a stagnation point in compressible flow is shown to depend only on the velocity of flow.
Date:
April 22, 1940
Creator:
Brevoort, M. J. & Joyner, U. T.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of performance of single-stage transonic compressor with guide vanes turning counter to direction of rotor whirl
Report presenting testing of a transonic compressor rotor with double-circular-arc blade sections and inlet guide vanes turning counter to the direction of rotor whirl to determine the effect of blade-row interaction on the performance of a transonic rotor. Results regarding overall performance, guide-vane performance, rotor-inlet conditions, rotor-outlet conditions, consideration of radial equilibrium, blade-element performance, and axial asymmetry in rotor-outlet flow are provided.
Date:
April 22, 1957
Creator:
Jahnsen, Lawrence J. & Fessler, Theodore E.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Static Longitudinal Stability Characteristics at Transonic Speeds of 30 Degree Sweptback Wing in Wing-Body Configuration With and Without Horizontal Tail
Memorandum presenting an investigation of the static longitudinal stability characteristics of two wings of different construction and slightly different flexibilities in the 16-foot transonic tunnel. The wings had the same external dimensions but one had a steel construction and the other was made of plastic reinforced by a steel core.
Date:
April 22, 1957
Creator:
Willis, Conrad M.
Object Type:
Report
System:
The UNT Digital Library
A flight investigation of area-suction and blowing boundary-layer control on the trailing-edge flaps of a 35 degree swept-wing-carrier-type airplane
Report presenting flight tests on an FJ-3 airplane to determine the flight characteristics of a carrier-type airplane with area-suction and blowing boundary-layer control on the trailing-edge flaps. Measurements were made of lift, drag, and bleed-air requirements for the different types of boundary-layer control systems. Results regarding lift, drag, flow requirements, performance, pilots' opinions, and approach-speed criteria are provided.
Date:
April 22, 1957
Creator:
Quigley, Hervey C.; Hom, Francis W. K. & Innis, Robert C.
Object Type:
Report
System:
The UNT Digital Library
Propagation of Sound Into a Wind-Created Shadow Zone
Memorandum presenting a general wave equation derived governing the propagation of sound in a stratified moving medium, the velocity of which varies only along one coordinate. A simplified equation is adopted which is satisfactory for the present application.
Date:
April 22, 1957
Creator:
Pridmore-Brown, David C.
Object Type:
Report
System:
The UNT Digital Library