Resource Type
Collection
Technical Report Archive and Image Library
428
National Advisory Committee for Aeronautics Collection
346
Texas Attorney General Opinions
263
Office of Scientific & Technical Information Technical Reports
96
TRAIL Microcard Collection
53
World War Two Collection
20
Government Documents A to Z Digitization Project
18
Texas State Publications
16
World War Two Newsmaps
14
Texas Soil Surveys
2
3 More
Serial/Series Title
Country
States
840 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
840
next
The Effects of Roentgen Rays on Adult Trout
None
Date:
April 30, 1949
Creator:
Welander, Arthur D.; Donaldson, Lauren R.; Foster, Richard F.; Bonham, Kelshaw; Seymour, Allyn H. & Lowman, Frank G.
Object Type:
Report
System:
The UNT Digital Library
Equations of State of Elements Based on the Generalized Fermi-Thomas Theory
The Fermi-Thomas model has been used to derive the equation of state of matter at high pressures and at various temperatures. Calculations have been carried out both without and with the exchange terms. Discussion of similarity transformations lead to the virial theorem and to correlation of solutions for different Z-values.
Date:
April 30, 1949
Creator:
Feynman, R. P.; Metropolis, N. & Teller, E.
Object Type:
Report
System:
The UNT Digital Library
The Machinability of Beryllium
The following report investigates the isolation of the cause of the unusual tool-wear rates found in machining beryllium as attributed to an inherent characteristic of beryllium, or an effect of inclusions in beryllium, as well as the evaluation of the comparative machinability of the various types of beryllium.
Date:
April 30, 1949
Creator:
Armstrong, E. T.; Dayton, Russell Wendt & Dawes, R. C.
Object Type:
Report
System:
The UNT Digital Library
A Comparative Analysis of the Liquid Metal Heat Transfer Systems for WMA
Introduction. As stated in Report KAPL 116, one of the objectives of the KAPL reactor is "to provide a prototype demonstration of the practical general of electrical power from Nuclear energy using molten sodium as the primary coolant. The reactor will generate steam at a temperature of 550 degrees F and 465 psia, including 90 degree superheat potentially capable of an efficiency of twenty-eight per cent in electrical output." The work reported here is intended to increase the scope and supply an independent check on the heat transfer system analysis that has previously been done. The purpose of these analyses is to investigate the effects on load rating and top reactor temperature.
Date:
April 29, 1949
Creator:
Selby, J. D.
Object Type:
Report
System:
The UNT Digital Library
Line-Vortex Theory for Calculation of Supersonic Downwash
"The perturbation field induced by a line vortex in a supersonic stream and the downwash behind a supersonic lifting surface are examined to establish approximate methods for determining the downwash behind supersonic wings. Lifting-lines methods are presented for calculating supersonic downwash. A bent lifting-line method is proposed for computing the downwash field behind swept wings. When applied to triangular wings with subsonic leading edges, this method gives results that, in general, are in good agreement with the exact linearized solution" (p. 635).
Date:
April 29, 1949
Creator:
Mirels, Harold & Haefeli, Rudolph C.
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: V-819
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Authority of the Commissioners' Court to require removal of a private water line crossing public streets in an unincorporated town.
Date:
April 29, 1949
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
The Critical Mass of a Spherical Reactor with Variable Intrinsic Buckling
Abstract: "The critical mass both of an untamped and water-tamped sphere with parabolic radial variation of the intrinsic buckling is calculated by a perturbation method. The result is applied to finding the minimum critical mass of plutonium in water suspension with infinite water temper; the calculations show that the minimum critical mass at constant concentration may be reduced by an amount of the order of 7.6% when the concentration of plutonium is permitted to vary throughout the suspension."
Date:
April 28, 1949
Creator:
Muller, G. M.
Object Type:
Report
System:
The UNT Digital Library
The Decomposition of Diphosphopyridinenucleotide (DPN) and Adenosinetriphosphate (ATP) by Ultraviolet Light
Resolution of the products of the reactions of DPN and ATP with ultraviolet light by techniques of partition paper chromatography is reported in this paper.
Date:
April 28, 1949
Creator:
Carter, C. E.
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: V-817
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: The authority of the Railroad Commission to require that installers of butane equipment carry products liability insurance.
Date:
April 28, 1949
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
[Office of Hanford Directed Operations events of importance for week ending April 27, 1949]
This report details events of importance reported by the Hanford Operations Office for the week ending April 27, 1949.
Date:
April 27, 1949
Creator:
Schlemmer, F. C.
Object Type:
Report
System:
The UNT Digital Library
Take-Off Stability Characteristics of a 1/13-Scale Model of the Consolidated Vultee Skate 7 Seaplane (TED No. NACA DE 338)
The take-off stability characteristics of a Consolidated Vultee Aircraft Corporation Skate 7 seaplane were determined in the Langley tank no. 2. Trim limits of stability, trim tracks, and elevator limits of stability are presented.
Date:
April 27, 1949
Creator:
McKann, Robert; Coffee, Claude W. & Arabian, Donald D.
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: V-813
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: The effect of H.B. No. 691 changing the name of North Texas State Teachers' College upon the right of the College to participate in funds provided by the College Building Amendment.
Date:
April 27, 1949
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: V-815
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: The constitutionality of H.B. 484 to validate summary delinquent tax sales previously made by tax collectors of counties, cities, and other governmental subdivisions.
Date:
April 27, 1949
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Assay, specific gravity, and iron methods for 234-5 process solutions
None
Date:
April 26, 1949
Creator:
Kendall, L.F.
Object Type:
Report
System:
The UNT Digital Library
THE HEAT CAPACITY OF U$sub 3$O$sub 8$ POWDER AS A FUNCTION OF TEMPERATURE (400-1800 F)
The mean heat capacity of a sample of powdered U/sub 3/O/sub 8/ was determined as a function of temperature from measurements of heat content. A thin-walled nickel capsule containing the material was heated in an electric furnace and dropped into a water calorimeter The Mean heat capacity values calculated from the experimental data were nearly constant over the temperature range, room temperture to 250-975 deg C (482-1790 deg F). The average value was 0.074 plus or minus 0.004 cal gm/sup -1EDE/C/sup -2/ (0.074 plus or minus 0.004 Btu lb/sup -1 deg F/du p -1/). From 975-1100 deg C (1790-2012 deg F) a small rise was observed. (auth)
Date:
April 26, 1949
Creator:
Powers, H.; Welch, F. & Trice, J.B.
Object Type:
Report
System:
The UNT Digital Library
A review of instruments developed for the measurement of the meteorological factors conductive to aircraft icing
Report presenting a review of the status of instruments suitable for the measurement of the meteorological factors conducive to aircraft icing. Nine instruments which appear to be the most promising for obtaining meteorological data are discussed and recommendations for their continued use and development are provided.
Date:
April 26, 1949
Creator:
Jones, Alun R. & Lewis, William
Object Type:
Report
System:
The UNT Digital Library
Study by NACA Wing-Flow Method of Transonic Drag Characteristics of a Blunt-Nose Body of Revolution and Comparison with Results for a Sharp-Nose Body
Memorandum presenting a study of a body of revolution with an NACA 1-50-100 nose inlet at zero angle of attack and no internal air flow to study the pressure drag of an extremely blunt-nose body and comparison with previous results for a sharp-nose body. The change from sharp to inlet nose while maintaining the same afterbody shape decreased the drag-rise Mach number from 0.94 to 0.90.
Date:
April 26, 1949
Creator:
Johnston, J. Ford & Lopatoff, Mitchell
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Tests of a 0.16-Scale Model of the Douglas MX-656 Airplane at High Subsonic Speeds, 1, Stability and Control Characteristics
Wind tunnel tests of the 0.16-scale Douglas MX-656 model were made at low and high subsonic Mach numbers to investigate the static longitudinal- and lateral stability characteristics. The tests shows that undesirable changes in longitudinal stability at the stall were apparently caused by an altered downwash pattern at the tail. The jettisonable nose fins were highly destabilizing. Compressibility effects for the test Mach numbers were not detrimental to the longitudinal- or lateral-stability characteristics.
Date:
April 26, 1949
Creator:
Hamilton, William T. & Cleary, Joseph W.
Object Type:
Report
System:
The UNT Digital Library
The effect of blade-section thickness ratio on the aerodynamic characteristics of related full-scale propellers at Mach numbers up to 0.65
The results of an investigation of two 10-foot-diameter, two-blade NACA propellers are presented for a range of blade angles from 20 degrees to 55 degrees at airspeeds up to 500 miles per hour. These results are compared with those from previous investigations of five related NACA propellers in order to evaluate the effects of blade-section thickness ratios on propeller aerodynamic characteristics.
Date:
April 25, 1949
Creator:
Maynard, Julian D. & Steinberg, Seymour
Object Type:
Report
System:
The UNT Digital Library
General algebraic method applied to control analysis of complex engine types
"A general algebraic method of attack on the problem of controlling gas-turbine engines having any number of independent variables was utilized employing operational functions to describe the assumed linear characteristics for the engine, the control, and the other units in the system. Matrices were used to describe the various units of the system, to form a combined system showing all effects, and to form a single condensed matrix showing the principal effects. This method directly led to the conditions on the control system for noninteraction so that any setting disturbance would affect only its corresponding controlled variable" (p. 581).
Date:
April 25, 1949
Creator:
Boksenbom, Aaron S. & Hood, Richard
Object Type:
Report
System:
The UNT Digital Library
Investigations of an Annular Diffuser-Fan Combination Handling Rotating Flow
Memorandum presenting an investigation of two annular diffusers of different conical angles of expansion but constant outer diameters with rotating flow behind a fan. The performance characteristics are determined and the rotational-kinetic-energy effects on the overall energy transformation are observed over a range of inlet mach numbers from 0.1 to 0.44 and angles of flow up to 28 degrees.
Date:
April 25, 1949
Creator:
Schwartz, Ira R.
Object Type:
Report
System:
The UNT Digital Library
Summary of Research on Experimental Refractory Bodies of High-Melting Nitrides, Carbides, and Uranium Dioxide
Abstract: A procedure for the preparation of the nitrides and carbides of several metals and the preparation of the refractory bodies from them is described. The investigation shows that reasonably strong and dense bodies can be prepared from these materials as well as from UO₂. Evidence showing the tendency toward instability at high temperatures of Be₃N₂, TaN, and ThN is presented. Evidence is also given indicating that the hexagonal structure reported by others for TaN is actually that for Ta₂N. A lattice for Th₂N₃ is proposed. The melting points of ThN, UN, and UC are determined to be 2630 ± 50°C,2650 ± 100°C, and 2590 ± 50°C respectively.
Date:
April 23, 1949
Creator:
Chiotti, P.
Object Type:
Report
System:
The UNT Digital Library
[Office of Hanford Directed Operations events of importance for week ending April 20, 1949]
This report details events of importance reported by the Hanford Operations Office for the week ending April 20, 1949.
Date:
April 22, 1949
Creator:
Schlemmer, F. C.
Object Type:
Report
System:
The UNT Digital Library
A report on lithium, sodium, and liquid neutron sources
The objectives in producing neutron sources are to produce uniform products of as high efficiencies as possible from the neutron yielding elements and to do this in the safest manner. The purpose of the present work was to improve the methods of preparing sources and at the same time increase the types of sources available. Lithium, sodium, and their compounds were chosen because the neutron fluxes and energies are low, thus making the experimental work less hazardous to the operator. Also, the elements are quite reactive, so that techniques which are successful with them can be easily adapted to other materials. Solvents for polonium, ways of mixing polonium and target, neutron yields, reproducibility, decay of the sources, means of recovering polonium, and materials for containers, were investigated.
Date:
April 22, 1949
Creator:
Bentz, L.L.
Object Type:
Report
System:
The UNT Digital Library