Resource Type

Analyses of Washington Coals: Supplement to Technical Papers 491 and 618 (open access)

Analyses of Washington Coals: Supplement to Technical Papers 491 and 618

From Washington Coalfields: The geographical distribution of the principal coal areas of Washington is shown in figure 1. Detailed information concerning these fields is given in Bureau of Mines Technical Paper 491. Further information on the minor coal areas is given in two bulletins of the Washington Division of Mines and Geology. Analyses, plastic properties, free-swelling indexes, and agglutinating values of the separate coals, together with data on yields of carbonization products and properties of the cokes produced in laboratory tests and under operating conditions."
Date: 1958
Creator: Daniels, Joseph; Yancey, H. F.; Geer, M. R.; Abernethy, R. F.; Aresco, S. J. & Hartner, F. E.
Object Type: Report
System: The UNT Digital Library
Analytical investigation of acceleration restriction in a fighter airplane with an automatic control system (open access)

Analytical investigation of acceleration restriction in a fighter airplane with an automatic control system

From Introduction: "In the present report, consideration is given to certain features intended to improve the accleration-limiting characteristics of a normal-accleration control system."
Date: January 1958
Creator: Matthews, James T., Jr.
Object Type: Report
System: The UNT Digital Library
Annotated Bibliography of Salt Deposits: A Supplement to U.S. Geological Survey Bulletin 1019-J (open access)

Annotated Bibliography of Salt Deposits: A Supplement to U.S. Geological Survey Bulletin 1019-J

Abstract: "This bibliography supplements the information on salt published in U.S. Geological Survey Bulletin 1019-J, "Annotated Bibliography and Index Map of Salt Deposits in the United States," by Walter B. Lang, 1957. The supplement contains additional information on the salt deposits of the United States and of foreign countries, as well as data on the composition, chemistry, geologic occurrences, geophysical exploration, distribution, technology, and production of salt. Additional supplements will be issued from time to time to keep information on these subjects current."
Date: January 1958
Creator: Lang, Walter B.; Read, Charles B.; Moore, George W. & Cooper, Margaret
Object Type: Report
System: The UNT Digital Library
Application of Fast Neutron Removal Theory to the Calculation of Thermal Neutron Flux Distributions in Reactor Shields (open access)

Application of Fast Neutron Removal Theory to the Calculation of Thermal Neutron Flux Distributions in Reactor Shields

Abstract: A calculational method is presented which may be used to determine fast and thermal neutron flux distributions at deep neutron penetrations in hydrogenous shields.
Date: 1958
Creator: Duncan, David S. & Whittum, H. O., Jr.
Object Type: Report
System: The UNT Digital Library
Argonne National Laboratory Annual Report: 1958 (open access)

Argonne National Laboratory Annual Report: 1958

Report issued by the Argonne National Laboratory discussing the variety of work done at the laboratory during the year of 1958. This report includes tables, illustrations, and photographs.
Date: 1958
Creator: Argonne National Laboratory
Object Type: Report
System: The UNT Digital Library
Army Airfield Pavement Evaluation, Report 4: Simmons Army Airfield, Fort Bragg, North Carolina (open access)

Army Airfield Pavement Evaluation, Report 4: Simmons Army Airfield, Fort Bragg, North Carolina

"This report describes studies and analyses made to determine the load-carrying capacities of the pavements at Simmons Army Airfield with respect to various aircraft landing gear assemblies and pavement life categories. The report includes data obtained from design specifications, in-place and laboratory tests performed during construction of the pavements, and in-place and laboratory tests performed for evaluation purposes" (p. 1).
Date: January 1958
Creator: Waterways Experiment Station (U.S.)
Object Type: Report
System: The UNT Digital Library
Astron Thermonuclear Reactor (open access)

Astron Thermonuclear Reactor

The following document describes the workings of the Astron thermonuclear reactor.
Date: 1958
Creator: Christofilos, Nicholas C.
Object Type: Report
System: The UNT Digital Library
Birds of Maryland and the District of Columbia (open access)

Birds of Maryland and the District of Columbia

Summary of the birds of Maryland and the District of Columbia, including geographical distribution, details on each species, and several maps of breeding ranges.
Date: 1958
Creator: Stewart, Robert E. & Robbins, Chandler S.
Object Type: Report
System: The UNT Digital Library
Capture - Positron Ratios for Allowed and First-Forbidden Transitions (open access)

Capture - Positron Ratios for Allowed and First-Forbidden Transitions

Report issued by the Brookhaven National Laboratory discussing capture positron ratios. As stated on page 1, "the purpose of this report is to present aids for the simple determination of the relative probabilities of K-electron capture and positron emission for allowed and first-forbidden transitions" (p. 1). This report includes tables, and illustrations.
Date: January 1958
Creator: Perlman, M. L. & Wolfsberg, Max
Object Type: Report
System: The UNT Digital Library
Causes of Roof-Fall Fatalities in Anthracite and Bituminous-Coal Mines, 1955 and 1956 (open access)

Causes of Roof-Fall Fatalities in Anthracite and Bituminous-Coal Mines, 1955 and 1956

Report issued by the U.S. Bureau of Mines discussing coal mining roof-fall accidents during 1955 and 1956. As stated in the summary, "the study includes an analysis of individual accident reports, sets forth the measurable factors, and compares such factors with a representative sample of average data from 39 anthracite mines and 117 bituminous mines" (p. 1).
Date: 1958
Creator: Joseph, R. D.
Object Type: Report
System: The UNT Digital Library
Contribution of the wing panels to the forces and moments of supersonic wing-body combinations at combined angles (open access)

Contribution of the wing panels to the forces and moments of supersonic wing-body combinations at combined angles

Report presenting a wind-tunnel investigation at Mach number 1.96 to determine the normal forces, pitching moments, and rolling moments contributed by each wing panel of a cruciform-wing and body combination over a wide range of combined angles of pitch and roll. The wings were triangular of aspect ratio 2 and the body was an ogive-cylinder combination. Results regarding individual panels and panel combinations are provided.
Date: January 1958
Creator: Spahr, J. Richard
Object Type: Report
System: The UNT Digital Library
A Correlation of Results of Flight Investigation With Results of an Analytical Study of Effects of Wing Flexibility on Wing Strains Due to Gusts (open access)

A Correlation of Results of Flight Investigation With Results of an Analytical Study of Effects of Wing Flexibility on Wing Strains Due to Gusts

An analytical study of the effects of wing flexibility on wing strains due to gusts has been made for four spanwise stations of a four-engine bomber airplane, and the results have been correlated with results of a previous flight investigation.
Date: 1958
Creator: Shufflebarger, C. C.; Payne, Chester B. & Cahen, George L.
Object Type: Report
System: The UNT Digital Library
Corrosion Resistance of Nickel Alloys in Molten Sodium Hydroxide (open access)

Corrosion Resistance of Nickel Alloys in Molten Sodium Hydroxide

Note presenting a study of the corrosion resistance of 11 nickel-base compositions to molten sodium hydroxide at 1500 and 1700 degrees Fahrenheit in order to find a container material for the caustic at these temperatures. Results are provided for the solid-solution alloys, nickel with mechanically dispersed second phase materials, and the precipitation-hardened alloy.
Date: January 1958
Creator: Probst, H. B.; May, C. E. & McHenry, Howard T.
Object Type: Report
System: The UNT Digital Library
Differential Voltammetry Using The Hanging Mercury Drop Electrode (open access)

Differential Voltammetry Using The Hanging Mercury Drop Electrode

"The general techniques of voltammetry with continuously varying potential have been applied to a differential method in which two electrolysis cells are used, each with a hanging mercury drop electrode. Using this method it is possible to determine lO/sup -6/ solutions with increased precision, and it is also possible to analyze solutions as dilute as 10/sup -6/ without removing oxygen from the electrolysis cells. Mixtures can be analyzed easily by adding individual components of the mixture to the reference cell."
Date: January 1958
Creator: Martin, Kenneth J. &
Object Type: Report
System: The UNT Digital Library
Discrete Potential Theory for Two-Dimensional Laplace and Poisson Difference Equations (open access)

Discrete Potential Theory for Two-Dimensional Laplace and Poisson Difference Equations

Note presenting a method for solving problems associated with Laplace and Poisson equations which, in general, requires considerably fewer equations than the usual methods and which gives a convergent solution by the method of successive approximations.
Date: January 1958
Creator: Saltzer, Charles
Object Type: Report
System: The UNT Digital Library
Effect of angle of attack and thickness on aerodynamic coefficients of a rigid wing oscillating at very low frequencies in two-dimensional supersonic flow (open access)

Effect of angle of attack and thickness on aerodynamic coefficients of a rigid wing oscillating at very low frequencies in two-dimensional supersonic flow

Report presenting an analytical expression for the lift and pitching-moment coefficients of a wing of finite thickness performing a plunging motion and rotary oscillations about some fixed angle of attack at very low frequencies in two-dimensional flow. Calculated lift and pitching-moment coefficients and design charts are presented.
Date: January 1958
Creator: Malvestuto, Frank S., Jr. & Goodwin, Julia M.
Object Type: Report
System: The UNT Digital Library
Effect of Environments of Sodium Hydroxide, Air, and Argon on the Stress-Rupture Properties of Nickel at 1500 Degrees F (open access)

Effect of Environments of Sodium Hydroxide, Air, and Argon on the Stress-Rupture Properties of Nickel at 1500 Degrees F

Note presenting the stress-rupture properties of commercially pure nickel at 1500 degrees Fahrenheit as determined for its application as a container material for molten sodium hydroxide. Stress-rupture tests of L-nickel tubes containing sodium hydroxide were run with atmospheres of air or argon external to the tubes. Sodium hydroxide was found to have little effect on the stress-rupture strength of nickel tubes tested in argon at 1500 degrees Fahrenheit for times up to 200 hours.
Date: January 1958
Creator: McHenry, Howard T. & Probst, H. B.
Object Type: Report
System: The UNT Digital Library
Effect of Flow Incidence and Reynolds Number on Low-Speed Aerodynamic Characteristics of Several Noncircular Cylinders With Applications to Directional Stability and Spinning (open access)

Effect of Flow Incidence and Reynolds Number on Low-Speed Aerodynamic Characteristics of Several Noncircular Cylinders With Applications to Directional Stability and Spinning

Note presenting the aerodynamic characteristics of several noncircular two-dimensional cylinders with axes normal to the stream at various flow incidences for a range of Reynolds numbers as determined from low-speed wind-tunnel tests. The results indicate that these parameters have large effects on the drag and side force developed on these cylinders. Results regarding drag of two-dimensional cylinders, side force developed on two-dimensional cylinders, and directional stability and spinning characteristics of three-dimensional bodies are provided.
Date: January 1958
Creator: Polhamus, Edward C.
Object Type: Report
System: The UNT Digital Library
Effect of oxygen recombination on one-dimensional flow at high Mach numbers (open access)

Effect of oxygen recombination on one-dimensional flow at high Mach numbers

Report presenting a theoretical analysis of air flow in a channel in which oxygen dissociation and recombination occur. An investigation is also made of the comparative relaxation times of the oxygen dissociation-recombination reaction in relation to molecular vibrations.
Date: January 1958
Creator: Heims, Steve P.
Object Type: Report
System: The UNT Digital Library
Effect of temperature on rolling-contact fatigue life with liquid and dry powder lubricants (open access)

Effect of temperature on rolling-contact fatigue life with liquid and dry powder lubricants

Report presenting an investigation of the effect of temperature using di(2-ethylhexyl) sebacate lubricant and dry powder lubricants on rolling-contact fatigue life on AISI M-1 tool-steel balls in the rolling-contact fatigue spin rig at maximum theoretical Hertz stress levels of 650,000 and 725,000 pounds per square inch in compression.
Date: January 1958
Creator: Carter, Thomas L.
Object Type: Report
System: The UNT Digital Library
Effects of Airplane Flexibility on Wing Strains in Rough Air at 35,000 Feet as Determined by a Flight Investigation of a Large Swept-Wing Airplane (open access)

Effects of Airplane Flexibility on Wing Strains in Rough Air at 35,000 Feet as Determined by a Flight Investigation of a Large Swept-Wing Airplane

A flight investigation was made on a large sweptback-wing bomber airplane and the results are compared with data previously obtained at low altitude (5,000 feet). The effects of wing flexibility on the wing strains were, on the average, about 20 percent larger at the higher altitude.
Date: January 1958
Creator: Rhyne, Richard H.
Object Type: Report
System: The UNT Digital Library
Evaluation of Foreign Multiplier Phototubes (open access)

Evaluation of Foreign Multiplier Phototubes

"Several multiplier phototubes produced by England, Russia, or Switzerland were evaluated for amplification, photocathode sensitivity, photo-electron collection efficiency, cathode uniformity, and dark current. A description of the various tubes by designation numbers is given, along nth a description of techniques and equipment used in testing."
Date: January 1, 1958
Creator: Bolakas, J. & Parker, P G.
Object Type: Report
System: The UNT Digital Library
Experimental investigation of the effects of some shroud design variables on the static thrust characteristics of a small-scale shrouded propeller submerged in a wing (open access)

Experimental investigation of the effects of some shroud design variables on the static thrust characteristics of a small-scale shrouded propeller submerged in a wing

Report presenting an experimental investigation to determine the effects of shroud-lip radius of curvature, shroud length, and shroud diffuser angle on the static thrust characteristics of a small-scale shrouded propeller which simulated a propeller submerged in the wing of an airplane. Results regarding the effect of propeller blade angle, effect of lip radius, effect of propeller location in shroud, effect of shroud length behind the propeller plane, effect of diffuser angle, and effect of ground proximity are provided.
Date: January 1958
Creator: Taylor, Robert T.
Object Type: Report
System: The UNT Digital Library
Experimental Investigation of the Lateral Trim of a Wing-Propeller Combination at Angles of Attack Up to 90 Degrees With All Propellers Turning in the Same Direction (open access)

Experimental Investigation of the Lateral Trim of a Wing-Propeller Combination at Angles of Attack Up to 90 Degrees With All Propellers Turning in the Same Direction

Note presenting an experimental investigation to study the feasibility, from considerations of lateral trim, of having all the propellers of a tilting-wing vertical-take-off-and-landing (VTOL) airplane rotate in the same direction since this is a desirable feature from practical considerations. The model was a wing with four propellers, the slipstream from which covered practically the entire span of the wing. Results regarding basic data and application of the data are provided.
Date: January 1958
Creator: Newsom, William A., Jr.
Object Type: Report
System: The UNT Digital Library