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322 Matching Results
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Annual Report of the Boy Scouts of America: 1931
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1931, activities, finance, honors, organizational leadership, and other information about scouting programs.
Date:
April 6, 1932
Creator:
Boy Scouts of America
System:
The Portal to Texas History
Annual Report of the Boy Scouts of America: 1936
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1936, activities, service reports, honors, finance, organizational leadership, and other information about scouting programs.
Date:
April 6, 1937
Creator:
Boy Scouts of America
System:
The Portal to Texas History
Piston temperatures in an air-cooled engine for various operating conditions
As part of a program for the study of piston cooling, this report presents the results of tests conducted on a single-cylinder, air-cooled, carburetor engine to determine the effect of engine operating conditions on the temperatures at five locations on the piston.
Date:
April 6, 1940
Creator:
Manganiello, Eugene J.
System:
The UNT Digital Library
The Precipitation of Lanthanum from Solution in the Presence of Radiation
Abstract. In order to anticipate radiation - chemical effects in solutions of active lanthanum, various solutions and suspensions containing lanthanum were irradiated with an electron beam. Separation of lanthanum from barium by the alcoholic HCl method is not rendered less efficient by radiation, although considerable gas evolution occurs. Suspensions of lanthanum as hydroxide and as ferrocyanide are not appreciably solubilized by radiation. Lanthanum oxalate is decomposed by radiation, is partially thrown into solution, and finally dissolves completely when all the excess oxalate ion in the solution has been destroyed.
Date:
April 6, 1945
Creator:
Penneman, R. A. (Robert Allen), 1919-; Ghormley, J. A.; Gordon, S.; Leaf, B. & Allen, A. O. (Augustine O.)
System:
The UNT Digital Library
Theory of Oscillating Absorber in a Chain Reacting Pile
Abstract. the fluctuation in pile intensity caused by an oscillating point absorber is calculation. It is found that the nature of the response depends on the frequency of the impressed oscillation. If the frequency is high compared to the decay rate of the high harmonics, the response consists of a wave which is propagated away from the oscillator. If the frequency is low, the propagated wave character of the response disappears and the intensity of the whole pile tends to oscillate with the same phase. The amplitude of the response decreases with increasing frequency.
Date:
April 6, 1945
Creator:
Cahn, Albert S., Jr.; Monk, A. T. & Weinberg, Alvin Martin, 1915-2006
System:
The UNT Digital Library
Results of Preliminary Flight Tests of the XS-1 Airplane (8-Percent Wing) to a Mach Number of 1.25
Presents results of the U. S. Air Forces' accelerated transonic flight tests of the XS-1 No. 1 airplane for the Mach number range from 0.70 to 1.25 at altitudes from 30,000 to 49,000 feet. Data are included on horizontal-tail loads and buffeting, longitudinal trim changes, elevator effectiveness and control forces, and lateral trim characteristics.
Date:
April 6, 1948
Creator:
Williams, W. C. & Beeler, De E.
System:
The UNT Digital Library
Corrosion Tests on Carboloy in Redox Process Solutions
Introduction: Static, total immersion corrosion tests were carried out at room temperatures with Carboloy grades 44-A, 78, 907, X-3119-A and X-3119-B in Redox process solutions (ANL, June 1, 1949 Flowsheet) 1AX, 1AF, and 1AS.
Date:
April 6, 1949
Creator:
Koenig, W. W.
System:
The UNT Digital Library
Experimental investigation of thrust augmentation of 4000-pound-thrust axial-flow-type turbojet engine by interstage injection of water-alcohol mixtures in compressor
Report presenting an experimental investigation of thrust augmentation of a 4000-pound-thrust axial-flow-type turbojet engine by interstage injection of water-alcohol mixtures into the compressor at sea-level, zero-ram conditions. the number, size, and arrangement of interstage nozzles were varied to produce a satisfactory augmentation system of minimum complication. Results regarding the unaugmented performance with and without interstage-injection nozzles, augmented performance with three-stage system, augmented performance with other injection systems, temperature surveys, and engine operation are provided.
Date:
April 6, 1950
Creator:
Povolny, John H.; Useller, James W. & Chelko, Louis J.
System:
The UNT Digital Library
Preliminary report on human excretion of tritium
Six subjects received a few millicuries Of tritium by inhalation of isotopically labeled hydrogen gas. The concentration of H{sup 3} in the urine of these individuals has been followed for a period of some 15 days. The rate of excretion of the tritium was found to be constant for a given subject but to vary considerably, among individuals. Data on five individuals arbitrarily normalized to coincide at zero time showed a range in biological half-life from about 9 days to nearly 13 days. These values are to be compared with the value calculated for the Chalk River ``Standard Man`` of 13.5 days, assuming the tritim to be confined to the body water.
Date:
April 6, 1950
Creator:
Anderson, E.C. & Pinson, E.
System:
The UNT Digital Library
Radioactive Isotopes of Bismuth
Five isotopes of bismuth occur in nature. Using particle accelerators providing helium ions up to 40 Mev in energy and deuterons up to 20 Mev in energy, it was possible to produce and identify two artificial radioactive isotopes. With the advent of the 184-inch Berkeley syncho-cyclotron and its hundreds of Mev energies, it was possible to form highly neutron-deficient bismuth isotopes extending more than ten mass units below stable Bi(209).
Date:
April 6, 1950
Creator:
Neumann, H. M.
System:
The UNT Digital Library
The System Pentaether-Uranyl Nitrate-Nitric Acid-Water
The system pentaether-uranyl nitrate-nitric acid-water has been studied in the liquid-liquid region, Aqueous solutions containing 0.0M to 8.2M nitric acid and 0.0M to 2.3M uranyl nitrate were equilibrated with pentaether, and the effects of nitric acid concentration, uranyl nitrate concentration and temperature are discussed. Phase diagrams for the system are presented and approximate delta-H values are given.
Date:
April 6, 1950
Creator:
Stover, C. N., Jr.
System:
The UNT Digital Library
Preparation of Some Protactinium Compounds and the Metal
Report discussing methods for preparing various protactinium compounds, including protactinium oxides, tetrafluoride, and oxysulfide. Additionally, a method for making the protactinium metal is mentioned.
Date:
April 6, 1951
Creator:
Sellers, Philip A.; Fried, Sherman; Elson, Robert E. & Zachariasen, William H.
System:
The UNT Digital Library
Radiologic Hazards Predicted for a Given Height Burst of an Atomic Bomb
Abstract: An appraisal is made of the radiologic hazard created by a 1000-ft. high air burst of a nominal sized nuclear bomb. Three sets of graphs are included which show the relations between dose rate (milliroentgens per hour), time post-shot, and distance from Ground Zero for a soil having given constituents. Estimates are given for fall-out activity (gamma) for distances up to about 200 miles from Ground Zero immediately after fall-out. It is pointed out that the radiologic hazard due to fall-out in the example cited is insignificant; further, that the radiologic hazard from similar nuclear bombs bursting at different heights above the ground will vary to a considerable extent.
Date:
April 6, 1951
Creator:
Perry, Charles H.
System:
The UNT Digital Library
Transient Temperatures in Flat Plates
Calculations presented were done to determine what maximum temperature gradients and stresses would be in typical designs of flat thorium plates, 100 mils thick and coolled on both sides by NaK.
Date:
April 6, 1951
Creator:
Hanson, Donald N.
System:
The UNT Digital Library
Wind-Tunnel Investigation at Low Speed of the Effects of Symmetrical Deflection of Half-Delta Tip Controls on the Damping in Roll and Yawing Moment Due to Rolling of a Triangular-Wing Model
Report presenting a low-speed investigation in the stability tunnel to determine the effects of symmetrical deflection of half-delta tip controls on the damping in roll and yawing moment due to rolling of a model with triangular wings. Triangular wings have numerous aerodynamic advantages, but it is difficult to obtain adequate longitudinal and lateral control with acceptable control forces when using them. Results regarding the lift characteristics and rolling characteristics are provided.
Date:
April 6, 1951
Creator:
Wolhart, Walter D.
System:
The UNT Digital Library
Wind-Tunnel Investigation at Subsonic and Low Transonic Speeds of the Effects of Aileron Span and Spanwise Location on the Rolling Characteristics of a Test Vehicle With Three Untapered 45 Degree Sweptback Wings
Report presenting a wind-tunnel investigation from a Mach number range of 0.30 to 0.94 to determine the rolling characteristics of a three-winged free-flight type of test vehicle with untapered 45 degree sweptback wings with NACA 65A009 airfoil sections and 0.20-chord ailerons. Results regarding wing-tip helix angles, rolling-moment coefficient, and damping-in-roll coefficients are provided.
Date:
April 6, 1951
Creator:
Johnson, Harold S.
System:
The UNT Digital Library
Aerodynamics of slender bodies at Mach number of 3.12 and Reynolds numbers from 2 x 10(exp 6) to 15 x 10(exp 6) 3: boundary layer and force measurements on a slender cone-cylinder body of revolution
Report presenting an experimental investigation to determine the aerodynamic characteristics of a slender cone-cylinder body of revolution in the 1- by 1-foot supersonic wind tunnel. Viscous drag and three component forces were measured at Mach number 3.12 and a range of Reynolds numbers and angles of attack. Results regarding pressure distributions, boundary layer, and forces are provided.
Date:
April 6, 1953
Creator:
Jack, John R.
System:
The UNT Digital Library
Altitude Starting Characteristics of an Afterburner With Autoignition and Hot-Streak Ignition
"Ignition of the fuel-air mixture in an afterburner of turbojet engine at altitude has often proved to be a different problem to solve. Electrical ignition has not proven satisfactory because of the unreliability of such systems (ref. 1). The ignition data reported herein were obtained for two after-burner configurations. Autoignition data are included for both configurations and hot-streak-ignition data, for only one. "
Date:
April 6, 1953
Creator:
Renas, P. E.; Harvey, R. W., Sr. & Jansen, E. T.
System:
The UNT Digital Library
The Design of Brittle-Material Blade Roots Based on Theory and Rupture Tests of Plastic Models
"Theoretical design charts based on Neuber's equations for symmetrically located notches are presented for estimating the approximate rupture strengths of blade roots made from brittle materials. The limit of applicability of the theoretical charts is shown as determined by rupture tests of plastic models. The optimum proportions among over-all root width, neck width, notch radius, and notch depth are determined from the design charts" (p. 1).
Date:
April 6, 1953
Creator:
Meyer, André J., Jr.; Kaufman, Albert & Caywood, William C.
System:
The UNT Digital Library
The Effect of Blade-Section Camber on the Stall-Flutter Characteristics of Three NACA Propellers at Zero Advance
Report presenting an investigation to determine the effect of blade-section camber on the stall-flutter characteristics of three propellers using a 6000-horsepower propeller dynamometer. Up to a certain blade angle, there was an increase in flutter-speed coefficient with an increase in blade-section design lift coefficient. An increase in thrust was found to lead to an increase in tip Mach number in the flutter region of the propeller blades.
Date:
April 6, 1953
Creator:
Allis, Arthur E. & Swihart, John M.
System:
The UNT Digital Library
Effect of Fuel Injectors and Liner Design on Performance of an Annular Turbojet Combustor With Vapor Fuel
Memorandum presenting a direct-connect duct investigation conducted with a one-quarter segment of a 25.5 inch diameter annular combustor which had been previously developed for liquid fuel injection. The combustor was modified by changing the fuel injectors and the liner design for vapor fuel injection. Results regarding accuracy and reproducibility, combustion efficiency, combustor-outlet temperature profiles, and pressure losses are provided.
Date:
April 6, 1953
Creator:
Norgren, Carl T. & Childs, J. Howard
System:
The UNT Digital Library
Effect of fuel injectors and liner design on performance of an annular turbojet combustor with vapor fuel
Report presenting a direct-connect duct investigation conducted with a one-quarter segment of a 25.5-inch-diameter annular combustor that had been developed for liquid fuel injection. The combustor was modified by changing the fuel injectors and liner design for vapor fuel injection. Results regarding accuracy and reproducibility, combustion efficiency, combustor-outlet temperature profiles, and pressure losses are provided.
Date:
April 6, 1953
Creator:
Norgren, Carl T. & Childs, J. Howard
System:
The UNT Digital Library
Investigation of Pressure Recovery of a Single-Conical-Shock Nose Inlet at Mach Number 5.4
An experimental investigation of the performance of a single-conical-shock diffuser was conducted at a Mach number of 5.4 and a Reynolds number based on model diameter of 375,000. Total-pressure recoveries of 13.7 and 13.1 percent were obtained at angles of attack of 0 degrees and 3 degrees, respectively. The corresponding kinetic energy efficiencies were 86.4 percent at an angle of attack of 0 degrees and 86.0 percent at an angle of attack of 3 degrees.
Date:
April 6, 1953
Creator:
Bernstein, Harry & Haefeli, Rudolph C.
System:
The UNT Digital Library
Corrosion Effects of Lowering the pH in TBP Waste Storage Tanks
Large savings in waste storage space may be realized by lowering the pH at which TBP waste is stored. Additional savings in neutralizing chemicals and operating time would also increase the monetary gain from such a process change. However, before such a change could be made, the corrosive effect of TBP waste at a lower pH on the mild steel waste storage tanks had to be determined.
Date:
April 6, 1954
Creator:
Groves, N. D.
System:
The UNT Digital Library