Resource Type
Serial/Series Title
NACA Research Memorandums
55
Atomic Energy Commission Reports
33
United States Geological Survey Reports
31
National Bureau of Standards Reports
28
Argonne National Laboratory Reports
24
United States Bureau of Mines Reports
22
U.S. Waterways Experiment Station Reports
19
United States Fish and Wildlife Service Reports
16
NBS monograph
13
TID
13
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Theoretical Characteristics of Two-Dimensional Supersonic Control Surfaces
Report presenting aerodynamic characteristics of uncambered symmetrical parabolic and double-wedge airfoils with leading-edge and trailing-edge flaps using the Busemann second-order-approximation theory. Characteristics presented include aileron effectiveness factor, rate of change of hinge-moment coefficient with aileron deflection, rate of change of the pitching-moment coefficient, and the location of the center of pressure of the airfoil-aileron combination.
Date:
July 27, 1948
Creator:
Morrissette, Robert R. & Oborny, Lester F.
Object Type:
Report
System:
The UNT Digital Library
Theoretical Investigation of an Automatic Control System With Primary Sensitivity to Normal Accelerations as Used to Control a Supersonic Canard Missile Configuration
Report presenting a theoretical investigation of an automatic control system with primary sensitivity to normal accelerations as used to control a specific supersonic canard missile. The control system is made up of an integrating servomotor that receives a signal from an accelerometer that is sensitive to normal accelerations of the airframe that it is controlling. The acceleration control system appears to work well for obtaining longitudinal control, but works best when combined with a homing seeker or guidance system for controlling directional space.
Date:
July 10, 1951
Creator:
Seaberg, Ernest C. & Smith, Earl F.
Object Type:
Report
System:
The UNT Digital Library
Global Distribution of Carbon-Dioxide Discharges and Major Zones of Seismicity
This report examines carbon-dioxide discharge in seismically active zones around the world. It contains a map of the "world distribution of carbon dioxide springs and major zones of seismicity."
Date:
May 1978
Creator:
Barnes, Ivan; Irwin, William P. & White, Donald E.
Object Type:
Report
System:
The UNT Digital Library
Historical Documentation of Major Coal-Mine Disasters in the United States not Classified as Explosions of Gas or Dust: 1846-1962
From Summary: "This publication lists and provides brief accounts of the major disasters not classified as explosions of gas or dust that have occurred in the coal mines of the United States from the earliest times to the present."
Date:
1963
Creator:
Keenan, Charles M.
Object Type:
Report
System:
The UNT Digital Library
Telecommunication Technologies, Networking and Libraries
Abstract: The conference provided an overview of current and developing technologies for digital transmission of image data that are likely to have an impact on the operations of libraries and information centers or provide support for information networking. Technologies reviewed include slow-scan television, teleconferencing, and videodisc. Other papers discuss technology and standards development for computer network interconnection through hardware and software, particularly packet-switched networks; computer network protocols for library and information service applications; the structure of a national bibliographic telecommunications network; and the major policy issues involved in the regulation or deregulation of the common communications carriers industry.
Date:
December 1981
Creator:
Knight, Nancy H.
Object Type:
Report
System:
The UNT Digital Library
Effect of air distribution on radial temperature distribution in one-sixth sector of annular turbojet combustor
Report presenting an experimental investigation in a one-sixth sector of an annular turbojet combustor to determine a method of controlling radial exhaust-gas-temperature distribution in a gas-turbine combustion chamber. The adjustment in controlling air was made by ducting the dilution air into the combustion zone in a predetermined manner through hollow radial struts or by modifying the basket-wall open-hole area. Results regarding the temperature distribution, temperature-rise efficiency, total-pressure loss, and altitude operating limits are provided.
Date:
April 5, 1950
Creator:
Mark, Herman & Zettle, Eugene V.
Object Type:
Report
System:
The UNT Digital Library
Respiratory Protective Equipment, Progress Report for June 1959 to April 1960
"Dust and gas masks and respirators have been an effective method under certain environmental conditions to reduce the inhalation of toxic aerosols. Under many conditions, however, their efficacy has been seriously questioned. It is the purpose of this study to evaluation over-all respirator performance on fine aerosols and to develop equipment whereby a greater degree of respiratory protection may be assured with reliability for highly toxic atmospheres."
Date:
June 27, 1960
Creator:
Silverman, Leslie; Fitzgerald, J. J., (Joseph James), 1919-; Burgess, William A.,1924-; Corn, Morton & Stein, Felix
Object Type:
Report
System:
The UNT Digital Library
The calculation of drag for airfoil sections and bodies of revolution at subcritical speeds
Report presenting a method for calculating the drag, in a real compressible fluid and at subcritical Mach numbers, of airfoil sections at arbitrary life coefficients and of bodies of revolution at zero angle of attack. The values of drag coefficient are compared with values obtained for the same configurations by other methods. The differences between the results are found to lie withint he limits of accuracy of current experimental techniques.
Date:
April 23, 1947
Creator:
Heaslet, Max A. & Nitzberg, Gerald E.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Uranium-Vanadium Deposits on the Vegetation of the Colorado Plateau
Report discussing a study on "the relation of plants to carnotite deposits in several districts of the Colorado Plateau...Basic geobotanical studies were made largely in the Yellow Cat district, near Thompson, Grand County, Utah."
Date:
October 1951
Creator:
Cannon, Helen L.
Object Type:
Report
System:
The UNT Digital Library
Performance of a blunt-lip side inlet with ramp bleed, bypass, and a long constant-area duct ahead of the engine : Mach number 0.66 and 1.5 to 2.1
Unsteady shock-induced separation of the ramp boundary layer was reduced and stabilized more effectively by external perforations than by external or internal slots. At Mach 2.0 peak total-pressure recovery was increased from 0.802 to 0.89 and stable mass-flow range was increased 185 percent over that for the solid ramp. Peak pressure recovery occurred just before instability. The 7 and one-third-diameter duct ahead of the engine reduced large total-pressure distortions but was not as successful for small distortions as obtained with throat bleed. By removing boundary-layer air the bypass nearly recovered the total-pressure loss due to the long duct.
Date:
December 28, 1956
Creator:
Allen, John L.
Object Type:
Report
System:
The UNT Digital Library
Studies of Acute and Chronic Radiation Injury at the Biological and Medical Research Division, Argonne National Laboratory, 1953-1970 : Description of Individual Studies, Data Files, Codes, and Summaries of Significant Findings
Between 1953 and 1970, studies on the long-term effects of external x-ray and {gamma} irradiation on inbred and hybrid mouse stocks were carried out at the Biological and Medical Research Division, Argonne National Laboratory. The results of these studies, plus the mating, litter, and pre-experimental stock records, were routinely coded on IBM cards for statistical analysis and record maintenance.
Date:
May 1994
Creator:
Grahn, D.
Object Type:
Report
System:
The UNT Digital Library
Health and Safety Laboratory Fallout Program Quarterly Summary Report: September 1, 1964 - December 1, 1964
Report that summarizes multiple laboratories' reports on global fallout deposition. Reports include data on Strontium-90 deposition recorded by the Health and Safety Laboratory, data from other laboratories, related interpretive reports, and recent publications related to fallout.
Date:
January 1, 1965
Creator:
Hardy, Edward P., Jr. & Rivera, Joseph
Object Type:
Report
System:
The UNT Digital Library
An Analytical Model for Predicting Cross-Country Vehicle Performance, Appendix D: Performance of Amphibious Vehicles in the Water-Land Interface (Hydrologic Geometry)
Summary: "Forty tests were conducted with two amphibious tracked vehicles and one amphibious wheeled vehicle at Eglin Air Force Base, Fla., and near Khon Kaen, Thailand, to determine the vehicles' capabilities for exiting closed bodies of water. Empirical relations, based on the data collected in this study and in previous studies, are presented to support the conclusions that performance of amphibious tracked and wheeled vehicles (in terms of "go-no go") in the water-land interface can be correlated with soil strength (expressed as average cone index of the 0- to 6-in. soil layer), and that the slope-climbing ability in the water-land interface of the tracked vehicles tested compares favorably with that of the same vehicles operating on land surfaces of similar soil composition and consistency" (p. ix).
Date:
February 1970
Creator:
Blackmon, Claude A.; Stinson, B. G. & Stoll, J. K.
Object Type:
Report
System:
The UNT Digital Library
Altitude-Wind-Tunnel Investigation of Combustion-Chamber Performance on J47 Turbojet Engine
From Introduction: "Results are presented to indicate the effect of altitude, flight Mach number, and exhaust-nozzle-outlet area on the combustion efficiency, the losses in total pressure occurring in the combustion chamber, and the fractional loss in engine cycle efficiency resulting from combustion-chamber pressure losses. The engine cycle efficiency is also presented.These results are shown graphically as a fraction of corrected engine speed and in tabular form."
Date:
December 15, 1950
Creator:
Campbell, Carl E.
Object Type:
Report
System:
The UNT Digital Library
The Linear Perturbation Theory of Axially Symmetric Compressible Flow With Application to the Effect of Compressibility on the Pressure Coefficient at the Surface of a Body of Revolution
Memorandum discussing four related methods for the study of compressible flow by means of the linear perturbation theory for the case of three-dimensional flow with axial symmetry. A general method which includes the other is also discussed briefly. In each case, the properties of the compressible flow are obtained from those of a corresponding incompressible flow.
Date:
July 18, 1947
Creator:
Herriot, John G.
Object Type:
Report
System:
The UNT Digital Library
Fatigue Tests of Riveted Joints : Progress Report of Tests of 17S-T and 53S-T Joints
Report presenting the fatigue data obtained at the Aluminum Research Laboratories from tests of various types of 17S-T and 53S-T specimens. The specimens were large enough to represent actual service conditions, but the repetition of loading was more rapid than would occur in ordinary service.
Date:
September 1944
Creator:
Hartmann, E. C.; Lyst, J. O. & Andrews, H. J.
Object Type:
Report
System:
The UNT Digital Library
Deflection-Coverage Relationship for Flexible Pavements
Summary: "This study was conducted for the purpose of developing a relationship between elastic pavement deflection and pavement performance (number of traffic applications necessary to cause failure). Data for the study were taken from past studies of airfield and highway pavements. A summary of test conditions, failure criteria, and traffic type is given for each data source. A relationship was developed between elastic deflection and the number of coverages of traffic for combined airfield and highway data and for airfield data only. The relationship of wheel load and tire pressure is given, and a multiple-regression equation was determined to predict coverages as a function of wheel load, tire pressure, and deflection" (p. xi).
Date:
June 1971
Creator:
Joseph, Alfred H. & Hall, Jim W., Jr.
Object Type:
Report
System:
The UNT Digital Library
Hydrology and Subsidence Potential of Proposed Coal-Lease Tracts in Delta County, Colorado
From purpose and objectives: The purpose of this report is to summarize the hydrologic investigation. The study objective was to provide data and a limited interpretation of surface- and ground-water flow systems.
Date:
1983
Creator:
Brooks, Tom
Object Type:
Report
System:
The UNT Digital Library
Lawrence Radiation Laboratory Medical and Health Physics Quarterly Report: October - December 1953
The following quarterly report covers a period between October, November, December of 1953 to April of 1954. The document provides reports on medical and health physics, particularly on the biological studies of radiation effects, the metabolic properties of various materials, radiation chemistry, health chemistry, and health physics.
Date:
April 1954
Creator:
Lawrence Radiation Laboratory
Object Type:
Report
System:
The UNT Digital Library
An investigation at low speed of a 51.3 degree sweptback semispan wing equipped with 16.7-percent-chord plain flaps and ailerons having various spans and three trailing-edge angles
Report presenting a wind-tunnel investigation performed at low speed to determine the aerodynamic characteristics of a 51.3 degree sweptback semispan wing equipped with 16.7-percent-chord plain flaps and ailerons with various spans and spanwise locations and one with span of aileron with trailing-edge angles of 6, 14, and 25 degrees. Results regarding the wing aerodynamic characteristics, aileron-control characteristics, spoiler control characteristics, and effect of wing-tip shape are provided.
Date:
November 12, 1948
Creator:
Fischel, Jack & Schneiter, Leslie E.
Object Type:
Report
System:
The UNT Digital Library
The Slumgullion Earth Flow: A Large-Scale Natural Laboratory
A report about the Slumgullion slide and landslides. It discusses climate changed and how landslides are measured.
Date:
1996
Creator:
Varnes, D. J. & Savage, W. Z.
Object Type:
Report
System:
The UNT Digital Library
Index of Generic Names of Fossil Plants 1966-1973
An index of names of new fossil plant genera found in literature between 1966 and 1973 which is now included in the pendium Index of Paleobotany.
Date:
1975
Creator:
Blazer, Anna M.
Object Type:
Report
System:
The UNT Digital Library
Vehicle/Guideway Interaction in Maglev Systems
Dynamic interactions between the vehicle and guideway in a high-speed ground transportation system based on magnetically levitated (maglev) vehicles were studied, with an emphasis on the effects of vehicle and guideway parameters. Two dynamic models for the vehicle are presented. In one model, the vehicle is considered to be a moving force traveling at various speeds on a simply supported single- or two-span beam. In the second model, the vehicle is considered to be one-dimensional and has two degrees of freedom; this model consists of the primary and secondary suspensions of the vehicle, with lumped masses, linear springs, and dampings. The Bernoulli-Euler beam equation is used to model the characteristics of a flexible guideway, and the guideway synthesis is based on modal analysis. Analyses were performed to gain an understanding of response characteristics under various loading conditions and to provide benchmark data for verification of existing comprehensive computer programs and some basic design guidelines for maglev systems. Finally, the German Transrapid maglev system was evaluated.
Date:
March 1992
Creator:
Cai, Y.; Chen, Shoei-Sheng & Rote, D. M.
Object Type:
Report
System:
The UNT Digital Library
Instrumentation of the Ames Supersonic Free-Flight Wind Tunnel
Memorandum presenting a description of the equipment used in the Ames supersonic free-flight wind tunnel to obtain the data necessary to measure the aerodynamic characteristics of free-flying models. The model is fired from a gun into the supersonic air stream of a blowdown-type wind tunnel. The action resulting from aerodynamic forces is computed from a time-distance-attitude record of the model flight through the test section.
Date:
April 24, 1952
Creator:
Briggs, Robert O.; Kerwin, William J. & Schmidt, Stanley F.
Object Type:
Report
System:
The UNT Digital Library