Collection
Technical Report Archive and Image Library
1,379
National Advisory Committee for Aeronautics Collection
812
Office of Scientific & Technical Information Technical Reports
765
Texas Attorney General Opinions
335
TRAIL Microcard Collection
313
USGS Topographic Map Collection
158
Texas State Publications
40
Government Documents A to Z Digitization Project
20
USDA Farmers' Bulletins
15
Boy and Girl Scout Annual Reports
2
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Serial/Series Title
NACA Research Memorandums
493
NACA Technical Notes
273
Atomic Energy Commission Reports
171
Oak Ridge National Laboratory Reports
152
CF (Series)
138
7.5 Minute Series (Topographic)
99
United States Geological Survey Reports
79
Trace elements investigations report
67
University of California Radiation Laboratory Reports
60
15 Minute Series (Topographic)
50
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States
2,706 Matching Results
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Accelerations in fighter-airplane crashes
From Introduction: "This report describes some measurements of these quantities obtained by crashing fighter aircraft under circumstances approximating those observed in service."
Date:
November 4, 1957
Creator:
Acker, Loren W.; Black, Dugald O. & Moser, Jacob C.
Object Type:
Report
System:
The UNT Digital Library
TEMPERATURE DEPENDENCE OF TAFEL SLOPE IN THE FORMATION OF VERY THIN ANODIC OXIDE FILMS ON NIOBIUM
A kinetic study was made of the formation of very thin anodic oxide films on niobium at constant current over the temperature range --10 to 70 deg C. Formation voltages were limited to the range below the oxygen evolution potential to eliminate possible interaction of an electronic component of the current with the measured formation field. It was found that the measured temperature dependence of Tafel slope agreed with that predicted by the theory of Mott and Cabrera. Using this theory, a zero field interfacial barrier height of 1.19 ev and a half-jump distance of 2.40 A were obtained. Values of the differential formation field are reported at current densities of 1000, 100, 10, and 1 mu a/ cm/sup 2/ at ten degree intervals over the temperature range studied. (auth)
Date:
January 1, 1957
Creator:
Adams, G.B. Jr. & Kao, T.
Object Type:
Report
System:
The UNT Digital Library
The Transfer of Plutonium Hexafluoride in the Vapor Phase
Plutonium hexafluoride is decomposed by heat, by its alpha radiation, and by reactions with most materials of construction. Laboratory experiments were performed to investigate means by which plutonium losses due to these reactions can be minimized during vapor-phase transfers of the compound. The experiments showed that plutonium hexafluoride vapor could be transferred satisfactorily through well fluorinated nickel equipment in a stream of fluorine or helium. The decomposition product of plutonium hexafluoride was refluorinated at 250 deg C by fluorine. (auth)
Date:
October 1, 1957
Creator:
Adams, M. D.; Steunenberg, R. K. & Vogel, R. C.
Object Type:
Report
System:
The UNT Digital Library
Metallurgical Examination of Hrt Leak Detector Tubing and Flanges
None
Date:
January 31, 1957
Creator:
Adamson, G. M.; Hammond, J. P.; Kegley, T. M. & White, J. K.
Object Type:
Report
System:
The UNT Digital Library
Metallurgical Examination of HRT Leak Detector Tubing and Flanges
After several failures had occurred in the HRT leak detector system, several lengths of this tubing were removed for metallurgical examination. The tubing was of type 304 stainless steel and was 1/4" in diameter with a 0.065 wall. The tubing had been purchased as three different lots, the first in 45 ft. lengths and the other two as standards lengths. Tubing from the first lot was used primarily for the shield penetration and, therefore, sections of it are present in all lines of the system. It appears that chloride contamination entered the system in a portion of the first lot of tubing used for the shield penetration. The exact source of the chloride cannot be determined, but after considering the results and visiting the manufacturer's plant, it appears most likely the contamination was during the manufacturing process.
Date:
January 31, 1957
Creator:
Adamson, G. M; Hammond, T. M.; Kegley, T. M. & White, J. K.
Object Type:
Report
System:
The UNT Digital Library
Coal Geology of the White Oak Quadrangle, Magoffin and Morgan Counties, Kentucky
From abstract: The White Oak quadrangle lies near the western edge of the eastern Kentucky coalfield and includes approximately 59 square miles of parts of Magoffin and Morgan Counties, Ky. The outcropping rocks are equivalent to most of the Breathitt formation of Pennsylvanian age. The regional southeast dip of the rocks is interrupted by the Irvine-Paint Creek fault, the Caney anticline, the Grape Creek syncline, and the Johnson Creek fault.
Date:
1957
Creator:
Adkison, W. L.
Object Type:
Report
System:
The UNT Digital Library
Experiments on Antiprotons: Cross Sections of Complex Nuclei
Experiments are described that have been designed to measure separately annihilation and reaction cross sections for antiprotons of approximately 450 MeV on oxygen, copper, silver, and lead. A new and more luminous spectrograph has been built for this experiment. The antiproton cross sections a r e compared with total proton cross sections, and are found to be larger by a factor varying from 1.74 for oxygen to 1.39 for silver. Calculations based on the optical model give a reasonable connection between these cross sections and the 6-p and 6-n cross sections. Finally, the information available on antiproton production cross sections is collected. There are indications that a free nucleon is several times as effective as a bound one for producing antiprotons.
Date:
July 22, 1957
Creator:
Agnew, Jr., Lewis E.; Chamberlain, Owen; Keller, Donald V.; Mermod, Ronald; Rogers, Ernest H.; Steiner, Herbert M. et al.
Object Type:
Report
System:
The UNT Digital Library
Analysis of horizontal-tail loads in pitching maneuvers on a flexible swept-wing jet bomber
From Introduction: "The analysis of flight data in the present report is, to a large extent, based on analyses and information contained in references 1 and 2 for wing deflections, reference 3 for horizontal-tail parameters, reference 4 for airplane lift-curve slopes and angles of zero lift, and reference 5 for wing centers of pressure."
Date:
December 1957
Creator:
Aiken, William S., Jr.
Object Type:
Report
System:
The UNT Digital Library
Horizontal-Tail Parameters as Determined From Flight-Test Tail Loads on a Flexible Swept-Wing Jet Bomber
Report presenting an analysis of horizontal-tail loads on a flexible multi-engined jet-propelled swept-wing medium bomber to determine the tail lift-curve slope due to tail angle of attack, tail-lift curve slope due to elevator deflection, tail pitching-moment coefficient due to elevator deflection, downwash factor, and elevator effectiveness factor. The effect of the stabilizer, effects of elevator flexibility, and effects of wing stability are presented.
Date:
January 17, 1957
Creator:
Aiken, William S., Jr. & Fisher, Raymond A.
Object Type:
Report
System:
The UNT Digital Library
Hanford Laboratories Operation Monthly Activities Report: March 1957
This is the monthly report of the Hanford Laboratories Operation, March, 1957. Metallurgy, reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, visits, biology operation, physics and instrumentation research, and employee relations are discussed.
Date:
April 15, 1957
Creator:
Albaugh, E. W.
Object Type:
Report
System:
The UNT Digital Library
HRT-CP: Results of H{sub 2}O-D{sub 2}O Separation Tests
None
Date:
July 15, 1957
Creator:
Albrecht, W. L.
Object Type:
Report
System:
The UNT Digital Library
Thorex Pilot Plant ; System for Concentrating Second Uranium Cycle Product
A system for concentrating uranyl nitrate solutions was designed and installed in the Thorex Pilot Plant. A total of 16,060 g of uranium was concentrated in the system in 68 batch runs. A total of 14,400 g total uranium (14.180 g U/sup 233/) was recovered as product suitable for shipment. Uranium loss to the evaporator condensate was 0.03% of the total uranium processed. The material balance across the system was 98.4%. The average concentration of uranium in the evaporator feed solution was 29 g/liter; the average concentration in the evaporated solution was 298 g U/liter and in the product solution was 199 g/liter. Radiation readings of bottles containing product solutions were taken with a hard-shell cutie pie immediately after each run, and these readings ranged from 35 to 1100 mr/hr. The radiation levels of the bottles of product solution shipped averaged 78 mr/hr. Bottles of product solution reading in excess of 300 mr/hr, maximum allowable for shipment. were reprocessed in the second-cycle solvent extraction system (Thorex) and reconcentrated. The products from seven runs had radiation levels in excess of 300 mr/hr at the time of concentration, or the activities had grown to that level by the time of shipment. The …
Date:
January 28, 1957
Creator:
Albrecht, W. L.
Object Type:
Report
System:
The UNT Digital Library
HRT-CP: RESULTS OF SOLIDS DISSOLUTION TESTS
None
Date:
July 30, 1957
Creator:
Albrecht, W.L.
Object Type:
Report
System:
The UNT Digital Library
THOREX PILOT PLANT: SYSTEM FOR CONCENTRATING SECOND URANIUM
A system for concentrating uranyl nitrate solutions was designed and installed in the Thorex Pilot Plant. A total of 16,060 g of uranium was concentrated in the system in 68 batch runs. A total of 14,400 g total uranium (14.180 g U/sup 233/) was recovered as product suitable for shipment. Uranium loss to the evaporator condensate was 0.03% of ihe total uranium processed. The material balance across the system was 98.4%. The average concentration of uranium in the evaporator feed solution was 29 g/liter; the average concentration in the evaporated solution was 298 g U/liter and in the product solution was 199 g/liter. Radiation readings of bottles containing product solutions were taken with a hard-shell cutie pie immediately after each run, and these readings ranged from 35 to 1100 mr/hr. The radiation levels of the bottles of product solution shipped averaged 78 mr/hr. Bottles of product solution reading in excess of 300 mr/hr, maximum allowable for shipment. were reprocessed in the second-cycle solvent extraction system (Thorex) and reconcentrated. The products from seven runs had radiation levels in excess of 300 mr/hr at the time of concentration, or the activities had grown to that level by the time of shipment. The …
Date:
January 28, 1957
Creator:
Albrecht, W.L.
Object Type:
Report
System:
The UNT Digital Library
Pressure Induced Metallic Transitions in Insulators
Experimental evidence that several ionic and molecular crystals become conductors in the metallic range at ~ 250,000 atm. is presented. For some the transition pressure is roughly defined. (T. R.H.)
Date:
November 1, 1957
Creator:
Alder, B. J. & Christian, R. H.
Object Type:
Report
System:
The UNT Digital Library
Operating Instructions for the UNIVAC Program OCUSOL-A : a Modification of the Eyewash Program
The Eyewash program, written by James H. Alexander and Nancy D. Given, provides solutions of reactor criticality problems in spherical geometry by means of the group diffusion method. It employs thirty lethargy groups (plus one thermal group) in nine regions. The input consists principally of specifying the geometrical scaling factor, boundaries and compositions of the various regions, and temperature level. The output includes the value of vc that would render the system critical, the relative fission density distribution, fissions, absorptions, and leakages in each lethargy group in each region, and, if desired, an edit of the flux at each space point, each lethargy, and an edit of the macroscopic cross sections for each lethargy, each region. OCUSOL-A is a minor modification and extension of Eyewash. It provides for the computation and editing, on the supervisory control typewriter, of the total absorptions in selected nuclides in the various regions. This information is useful in the computation of breeding ratios and the preparation of detailed neutron balances, and in the estimation of flux-averaged cross sections for use in estimating the rate of change of concentration of the various nuclides with burn-up. The program also provides for saving and transferring the final fission …
Date:
June 5, 1957
Creator:
Alexander, L. G.; Carrison, D. A.; Roberts, J. T. & Van Norton, R.
Object Type:
Report
System:
The UNT Digital Library
OPERATING INSTRUCTIONS FOR THE UNIVAC PROGRAM OCUSOL-A, A MODIFICATION OF THE EYEWASH PROGRAM
None
Date:
June 1, 1957
Creator:
Alexander, L.G.; Carrison, D.A.; Roberts, J.T. & Van Norton, R.
Object Type:
Report
System:
The UNT Digital Library
Theoretical and Experimental Investigation of the Subsonic-Flow Fields Beneath Swept and Unswept Wings with Tables or Vortex-Induced Velocities
"The flow-field characteristics beneath swept and unswept wings as determined by potential-flow theory are compared with the experimentally determined flow fields beneath swept and unswept wing-fuselage combinations. The potential-flow theory utilized considered both spanwise and chordwise distributions of vorticity as well as the wing-thickness effects. The perturbation velocities induced by a unit horseshoe vortex are included in tabular form" (p. 1).
Date:
1957
Creator:
Alford, William J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of effects of moderate sideslip on the flow fields near a 45 degree swept-wing-fuselage combination at low speed
The flow fields near a 45 degree swept-wing-fuselage combination at moderate angles of sideslip (plus-or-minus 8 degrees), as determined experimentally at low speed, are presented as variations with chordwise distance for various spanwise and vertical locations and angles of attack. The results indicated that for positions close to the fuselage (on and near the plane of symmetry) changes in the angle of sideslip caused large changes in the flow-field characteristics and particularly in the local angles of sideslip, which in some cases were nearly double the static angle of sideslip.
Date:
July 12, 1957
Creator:
Alford, William J., Jr. & King, Thomas J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of flow fields at zero sideslip near swept- and unswept-wing-fuselage combinations at low speed
Report presenting an experimental determination of the flow fields near swept- and unswept-wing-fuselage combinations at zero sideslip as determined experimentally at low speed for various spanwise and vertical locations and angles of attack as variations with chordwise distance. Results regarding the swept-wing-fuselage flow fields, unswept-wing-fuselage flow fields, and a comparison of wing-fuselage and fuselage-alone flow fields are provided.
Date:
January 18, 1957
Creator:
Alford, William J., Jr. & King, Thomas J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental Static Aerodynamic Forces and Moments at High Subsonic Speeds on a Canard Missile During Simulated Launching From the Midsemispan Location of a 45 Degree Sweptback Wing-Fuselage-Pylon Combination at Zero Sideslip
Report presenting an investigation at high subsonic speeds to determine the static aerodynamic forces and moments on a canard missile model during simulated launching from the midsemispan location of a 45 degree sweptback wing-fuselage-pylon combination. Significant variations in all the aerodynamic components were noted with changes in chordwise location of the missile. Results regarding force and moment characteristics and effects of angle of attack and Mach number are provided.
Date:
January 14, 1957
Creator:
Alford, William J., Jr. & King, Thomas J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental Static Aerodynamic Forces and Moments at High Subsonic Speeds on a Missile Model During Simulated Launching From the Midsemispan Location of a 45 Degree Sweptback Wing-Fuselage-Pylon Combination
"An investigation was made at high subsonic speeds in the Langley high-speed 7- by 10-foot tunnel to determine the static aerodynamic forces and moments on a missile model during simulated launching from the midsemispan location of a 45 degree sweptback wing-fuselage-pylon combination. The results indicated significant variations in all the aerodynamic components with changes in chordwise location of the missile. Increasing the angle of attack caused increases in the induced effects on the missile model because of the wing-fuselage-pylon combination" (p. 1).
Date:
January 10, 1957
Creator:
Alford, William J., Jr. & King, Thomas J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental Static Aerodynamic Forces and Moments at High Subsonic Speeds on a Missile Model During Simulated Launching From Unswept-, Sweptback-, and Modified-Delta-Wing-Fuselage Combinations at Zero Sideslip
Report presenting an investigation in the high-speed tunnel to determine the static aerodynamic forces and moments on a missile model during simulated launching from midsemispan locations of various types of wings. The purpose of the investigation is to determine the nature and origin of the mutual interference experienced by various combinations of wing-fuselage models and externally carried missiles. Results regarding isolated missile characteristics, the effect of varying chordwise position, effects of angle of attack and Mach number, effect of airplane wing geometric characteristics, effect of missile spanwise location, and comparison of wing-fuselage and fuselage effects on the missile forces and moments are provided.
Date:
March 19, 1957
Creator:
Alford, William J., Jr. & King, Thomas J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Motion of a ballistic missile angularly misaligned with the flight path upon entering the atmosphere and its effect upon aerodynamic heating, aerodynamic loads, and miss distance
From Summary: "An analysis is given of the oscillating motion of a ballistic missile which upon entering the atmosphere is angularly misaligned with respect to the flight path. The history of the motion for some example missiles is discussed from the point of view of the effect of the motion on the aerodynamic heating and loading. The miss distance at the target due to misalignment and to small accidental trim angles is treated. The stability problem is also discussed for the case where the missile is tumbling prior to atmospheric entry."
Date:
October 1957
Creator:
Allen, H. Julian
Object Type:
Report
System:
The UNT Digital Library