UNT Libraries Government Documents Department - 528 Matching Results

Search Results

prev Results: 49 - 72 next
open access

Autoxidation of Uranous Salts in Water Solution

Description: From introduction: "The fact that tetravalent uranium either in the form of solutions of its salts or, in some cases, in the dry state is readily oxidized by gaseous oxygen, has been observed by various investigators. A quantitative study of this reaction appeared to be desirable as a means of learning more about the nature of the ionic species present in uranous solutions. It was also of potential value in determining the importance of autoxidation as an undesirable side reaction involved in t… more
Date: April 20, 1946
Creator: Nichols, Ambrose R., Jr.
Item Type: Refine your search to only Report
open access

The Beta-Gamma Hand and Foot Counters

Description: Abstract: This is basically a counting rate meter, with an alarm circuit, operating from four GM tubes as the detecting elements. The Hand Counter comprises four logarithmic counting rate meters working from four GM tubes mounted individually, with associated electronic circuits, in suitable shields with a metal mesh type of window. Both sides of both hands are sampled simultaneously. In the Foot Counter, two GM tubes are separately and mounted in a suitable mesh window shielded with the el… more
Date: May 1946
Creator: Bradley, W. H.
Item Type: Refine your search to only Report
open access

Boundary-layer-control tests of two wings in the Langley Propeller-Research Tunnel

Description: Report presenting tests of two wings, one stubbed and one regular-sized, in the propeller-research tunnel to determine the increase in lift obtainable by boundary-layer control and to determine the power required for the blower. Lift coefficients of about 3.2 were obtainable for both wings, but the pressure method required several times more power than the suction method.
Date: January 1946
Creator: Freeman, Hugh B.
Item Type: Refine your search to only Report
open access

The Bragg Reflection of Neutrons by a Single Crystal

Description: From cover page: This document has been assigned the above MDDC (Manhattan District Declassification) number, as given in the List of Declassified Documents issued semi-monthly by the Research Division, Manhattan District. In the case of Los Alapnos reports, LADC (Los Alamos Declassification) numbers are listed on the title page if known. This declassified document may differ materially from the original classified document by reason of deletions necessary to accomplish declassification. Hence,… more
Date: June 14, 1946
Creator: Zinn, Walter H.
Item Type: Refine your search to only Report
open access

Calculation of surface temperatures in steady supersonic flight

Description: Report presenting the calculation of surface temperatures for bodies in steady supersonic flight at Mach numbers from 2 to 10, altitudes from 50,000 to 200,000 feet, and emissivites from 0 to 1. The importance of the effects of radiation and convection was determined. Some suggestions for further research into unsolved problems are also provided.
Date: December 1946
Creator: Wood, George P.
Item Type: Refine your search to only Report
open access

Calibration Tunnel for High Speed

Description: "For the investigation of measuring instruments at higher speeds up to a Mach number 0.7 a tunnel with closed test section was built in 1942 which was as simple and cheap as possible. The blower was a radial blower with straight sheet vanes of 800-millimeter diameter the tips of which were bent backward a little. The blower sucks the air through a honeycomb of diameter 1.2 meter with wide meshes" (p. 1).
Date: October 1946
Creator: Pretsch, J.
Item Type: Refine your search to only Report
open access

Calibrations of Service Pitot Tubes in the Langley 24-Inch High-Speed Tunnel

Description: Report discusses calibration testing performed on a Kollsman type G-1 and an NAF No. 1 pitot tube at several Mach numbers and angles of attack. The effect of drain holes on the flow within the pitot tube was analyzed and the ability to estimate the error in the total pressure was created. The accuracy of the extrapolated and estimated values were found to be within reasonable limits.
Date: February 1946
Creator: Lindsey, W. F.
Item Type: Refine your search to only Report
open access

Characteristics of a Hot Jet Discharged from a Jet-Propulsion Engine

Description: From Summary: "An investigation of a heated jet was conducted in conjunction with tests of an axial-flow jet-propulsion engine in the Cleveland altitude wind tunnel. Pressure and temperature surveys were made across the jet 10 and 15 feet behind the jet-nozzle outlet of the engine. Surveys were obtained at pressure altitudes of 10,000, 20,000, 30,000, and 40,000 feet with test-section velocities from 30 to 110 feet per second and test-section temperatures from 60 F to -50 F. From measurements t… more
Date: December 27, 1946
Creator: Fleming, William A.
Item Type: Refine your search to only Report
open access

Characteristics of a Sealed Internally Balanced Aileron from Tests of a 1/4-Scale Partial-Span Model of the Republic XF-12 Airplane in the Langley 19-Foot Pressure Tunnel

Description: This paper presents the results of the aileron investigation and includes rolling-moment, yawing-moment, and aileron hinge-moment coefficients and pressure coefficients across the aileron-balance seal through a range of angle of attack, tab deflection, and aileron deflection with flaps neutral and deflected 20 degrees and 55 degrees. Some of the effects of wing roughness and balance seal leakage on the aileron and tab characteristics are also presented.
Date: November 1, 1946
Creator: Graham, Robert R.; Martina, Albert P. & Salmi, Reino J.
Item Type: Refine your search to only Report
open access

The Charge on Uranium(VI) in Acid Solution

Description: Abstract. The distribution coefficient of U(VI) between perchloric acid solutions and benzene solutions of TTA has been measured as a function of the acidity. It was possible to interpret the data in terms of the charge on the U(VI) species present in the aqueous phase. The experiments indicate that U(VI) exists as an ion charge +2 at acidities from 0.1M to 2.5M. In the interpretations of the distribution data, it was necessary to know the acidity coefficient of the uranyl chelate in the ben… more
Date: August 15, 1946
Creator: King, Edward L.
Item Type: Refine your search to only Report
open access

Charts for Critical Combinations of Longitudinal and Transverse Direct Stress for Flat Rectangular Plates

Description: Report presenting the use of the energy method to derive interaction equations that define the critical combinations of longitudinal and transverse direct stress for isotropic flat rectangular plates with four different edge conditions. Charts based on the interaction equations are presented for the four cases.
Date: March 1946
Creator: Libove, Charles & Stein, Manuel
Item Type: Refine your search to only Report
open access

Charts for the Rapid Calculation of the Work Required to Compress Dry Air

Description: Report presenting a study of accurate values of the specific heat for dry air applied to the calculation of work required to compress dry air. Two charts are provided that allow the work of compression to be determined from the initial temperature, overall pressure ratio, and either the compression exponent or adiabatic efficiency of the compressor.
Date: April 1946
Creator: Benser, William A.; Wilcox, Ward W. & Voit, Charles H.
Item Type: Refine your search to only Report
open access

Charts of Thermodynamic Properties of Fluids Encountered in Calculations of Internal Combustion Engine Cycles

Description: "A single chart has been prepared that simplifies the calculation of the thermodynamic properties of air, various octene-air mixtures, and mixtures of those with their products of combustion at all temperatures below which chemical dissociation becomes unimportant. The chart is based on the use of 1 pound mol of mixture, and examples of its use are given in the form of the calculation of a turbocompressor power plant and a supercharged Otto engine cycle" (p. 1).
Date: May 1946
Creator: Hottel, H. C. & Williams, G. C.
Item Type: Refine your search to only Report
open access

The Chemical Effects of Nuclear Transformations

Description: This technical report is divided into two sections addressing two different chemical effects of nuclear transformations. The first section discusses the beta decay of lanthanum to cerium. The second section discusses the beta decay of selenium to bromine.
Date: June 6, 1946
Creator: Coryell, Charles D. (Charles Du Bois), 1912-1971; Gest, H.; Edwards, R. R. & Davies, T. H.
Item Type: Refine your search to only Report
open access

Clamped Long Rectangular Plate Under Combined Axial Load and Normal Pressure

Description: Note presenting a solution for the buckling load and load carried after buckling of a clamped rectangular plate with a width-length ratio of 1:4 under combined normal pressure and axial load. The results indicate that normal pressure causes a smaller increase in the buckling load of plates with clamped edges than of plates with simply supported edges.
Date: June 1946
Creator: Woolley, Ruth M.; Corrick, Josephine N. & Levy, Samuel
Item Type: Refine your search to only Report
open access

Column Adsorption Methods in Analytical Chemistry

Description: Technical report. Numerous application of various column adsorption techniques to inorganic analytical chemistry have appear in the literature. The comparatively recent introduction of ion exchange resins has resulted in the development of efficient, simple, and rapid column adsorption methods. the principal service of column adsorption methods to analytical chemistry is that of providing a relatively simple means of separating an element in a sufficiently pure state so that a direct precipita… more
Date: January 11, 1946
Creator: Schubert, Jack
Item Type: Refine your search to only Report
open access

Column and Plate Compressive Strengths of Aircraft Structural Materials: Extruded 14S-T Aluminum Alloy

Description: "Column and plate compressive strengths of extruded 14S-T aluminum alloy were determined both within and beyond the elastic range from tests of flat-end H-section columns and from local-instability tests of H-, Z-, and channel-section columns. These tests are part of an extensive research investigation to provide data on the structural strength of various aircraft materials. The results are presented in the form of curves and charts that are suitable for use in the design and analysis of aircra… more
Date: May 1946
Creator: Heimerl, George J. & Niles, Donald E.
Item Type: Refine your search to only Report
open access

The Column Strength of Aluminum Alloy 75S-T Extruded Shapes

Description: "Because the tensile strength and tensile yield strength of alloy 75S-T are appreciably higher than those of the materials used in the tests leading to the use of the straight-line column curve, it appeared advisable to establish the curve of column strength by test rather than by extrapolation of relations determined empirically in the earlier tests. The object of this investigation was to determine the curve of column strength for extruded aluminum alloy 75S-T. In addition to three extruded s… more
Date: January 1946
Creator: Holt, Marshall & Leary, J. R.
Item Type: Refine your search to only Report
open access

Comparative Effectiveness and Additivity of Fission Neutrons Gamma Rays and Beta Rays of Drosphila Eggs

Description: From abstract: "Some investigations have been made to ascertain the similarity of the mechanism of action of radiation which are different in their specific ionization. A suggested approach was to determine if the energies absorbed from the different types of radiation are additive in their lethal effects on biological objects. In an attempt to determine the additivity of ionizing radiation various dose combinations of fast neutrons, gamma rays and beta rays were administered to Drosophila eggs… more
Date: February 1946
Creator: Stapleton, G. E. & Zirkle, Raymond E. (Raymond Elliot), 1902-1988
Item Type: Refine your search to only Report
Back to Top of Screen