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25
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21
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3
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1
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1
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1
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1,534
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1,485
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310
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177
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112
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109
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103
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25
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21
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NACA Research Memorandums
158
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91
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62
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53
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52
San Antonio Board of Adjustment Monthly Report
50
109th Congress
26
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22
Personal Papers (MS 80-0002)
21
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Results:
1 - 24 of
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[Report from the Treasurer]
Report from the treasurer for the year 1858.
Date:
January 3, 1859
Creator:
Salinas, Juan José
System:
The Portal to Texas History
Life Zone Investigations in Wyoming
Characterizes five transcontinental life zones in Wyoming; defines their extent and limits; lists mammal, breeding bird, reptile, amphibian, and plant species; and provides notes on distribution and abundance of trees observed during the survey.
Date:
October 3, 1917
Creator:
Cary, Merritt
System:
The UNT Digital Library
Development of Aeronautical Engines by the Army and Navy
Different aircraft engines are categorized as being of interest to only the Army or Navy or to both armed services. A listing of the different engines is presented along with some statistics, namely, horsepower.
Date:
March 3, 1921
Creator:
unknown
System:
The UNT Digital Library
[Montgomery County School District 15 Resources and Liabilities]
A list of financial resources and liabilities for Montgomery County School District 15, written by P. R. Clarke for C. C. Cox on a blank form intended for taking student censuses. Envelope is included.
Date:
February 3, 1922
Creator:
Clarke, P. R.
System:
The Portal to Texas History
The Pressure Distribution Over the Wings and Tail Surfaces of a PW-9 Pursuit Airplane in Flight
This report presents the results of an investigation to determine (1) the magnitude and distribution of aerodynamic loads over the wings and tail surfaces of a pursuit-type airplane in the maneuvers likely to impose critical loads on the various subassemblies of the airplane structure, (2) To study the phenomenon of center of pressure movement and normal force coefficient variation in accelerated flight, and (3) to measure the normal accelerations at the center of gravity, wing-tip, and tail, in order to determine the nature of the inertia forces acting simultaneously with the critical aerodynamic loads. The results obtained throw light on a number of important questions involving structural design.
Date:
February 3, 1930
Creator:
Rhode, Richard V.
System:
The UNT Digital Library
Investigation of the Diaphragm-Type Pressure Cell
"This report relates to various improvements in the process of manufacture of the NACA standard pressure cell. Like most pressure recording devices employing thin diaphragms, they would in general show considerable change in calibration with temperature and also some change of calibration with time or aging effect. The required diaphragm thickness and the desirable rate of mechanical magnification have been determined on the basis of several hundred tests" (p. 507).
Date:
February 3, 1931
Creator:
Theodorsen, Theodore
System:
The UNT Digital Library
Air conditions close to the ground and the effect on airplane landings
This report presents the results of an investigation undertaken to determine the feasibility of making glide landings in gusty air. Wind velocities were measured at several stations between the ground and a height of 51 feet, and flight tests were made to determine the actual influence of gusts on an airplane gliding close to the ground.
Date:
April 3, 1934
Creator:
Thompson, F. L.; Peck, W. C. & Beard, A. P.
System:
The UNT Digital Library
The Measurement of the Field of View From Airplane Cockpits
"A method has been devised for the angular measurement and graphic portrayal of the view obtained from the pilot's cockpit of an airplane. The assumption upon which the method is based and a description of the instrument, designated a "visiometer", used in the measurement are given. Account is taken of the fact that the pilot has two eyes and two separate sources of vision. The view is represented on charts using an equal-area polar projection, a description and proof of which are given" (p. 167).
Date:
October 3, 1934
Creator:
Gough, Melvin N.
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1938
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1938, activities, service reports, honors, finance, organizational leadership, and other information about scouting programs.
Date:
April 3, 1939
Creator:
Boy Scouts of America
System:
The Portal to Texas History
Ground Effect on Downwash Angles and Wake Location
"A theoretical study was made of the reduction in downwash and the upward displacement of the wake in the presence of the ground, and some verification of theory was obtained by means of air-flow measurements made with a ground-board and image-wing combination. Methods are given for estimating the effects and numerous examples are included to illustrate the nature of these effects and to show their order of magnitude" (p. 1).
Date:
October 3, 1941
Creator:
Katzoff, S. & Sweberg, Harold H.
System:
The UNT Digital Library
Effect of Temperature on the Surface of Cast Uranium Metal
Technical report. Photomicrographs showing the effect of heating polished uranium surface at 600, 700, 850, and 1000 degrees C, and sandblasted and cut surface at 1000 degrees C are included.
Date:
December 3, 1942
Creator:
Johns, I. B; Newton, A. S. & Gladrow, E. M.
System:
The UNT Digital Library
Radiation Chemistry: The Chemical Effects of Radiation on Matter
Lecture notes from a training program. "It is the function of the section on radiation chemistry to determine the effects of all radiations and high energy particles produced under the various operating conditions on all the materials which will be exposed to them."
Date:
May 3, 1943
Creator:
Burton, Milton
System:
The UNT Digital Library
Experimentation on the Extraction of Uranium from Western Ores by Leaching with Sodium Carbonate and Sodium Bicarbonate
Purpose: "The purpose of the following experiments was to obtain data on the selective extraction of uranium over vanadiur from samples of vanadium ores by leaching with sodium carbonate or sodium bicarbonate solutions, with the object of establishing the time, temperature, and concentration conditions necessary for satisfactory extractions."
Date:
December 3, 1943
Creator:
Saunders, E. R. & Carosella, M. C.
System:
The UNT Digital Library
Report No. EC-3, dated from November 6, 1943 to December 31, 1943 Contained in Engineer's Log Book
This technical report contains day by day experimental data reported in Engineer's Log Book, Electro-Chemistry Department, supporting Report No. EC-11 dated November 15, 1944, by W. L. Grube, Research Laboratories Division, General Motors Corporation.
Date:
January 3, 1944
Creator:
Grube, William L.
System:
The UNT Digital Library
Contributions to the Water Problem
Technical report describing the investigation of the short-lived activities produced in oxygen compounds by irradiation with pile neutrons. The most prominent of these activities in cooling water is a beta and gamma emitting activity of about 8 second half-life. Because of its production by epicadmium neutrons it was believed to be the 8 second N16 produced in the pile by n,p on O16. The identification has been accomplished and it is established that the 8 second activity is N16. Part 2 of the report deals with the determination of the recoil range of the Al28 atoms formed by pile n,p reaction on Al27.
Date:
July 3, 1944
Creator:
Novey, Theodore B.
System:
The UNT Digital Library
The Distribution of Thermal Neutrons in a Slug with Thick End Caps
The distribution of thermal neutrons in a W slug having a one centimeter aluminum end cap has been calculated on the basis of simple diffusion theory. It is found that the average neutron density, and therefore the power output, at the end of the slug is about 34% higher than the density far from the end cap. This result agrees well with the recent Argonne pile experiments (CP-1729).
Date:
August 3, 1944
Creator:
Wilkins, J. Ernest, Jr., 1923-2011
System:
The UNT Digital Library
Temperature and Heat Flow in a Graphite Electrode
In making various experimental heat studies a power producing metal slug is simulated by a slug with a graphite rod electrode of 3/8" diameter inserted lengthwise through it. There is a helium filled annular space between the graphite and the inner surface of the slug cylinder. Radiant heat passes from the electrode to the metal; with proper adjustment of the electrode current the slug in the steady state will therefor "produce" the same amount of energy from its exterior surface as it would under operating conditions. The question arises, however, as to how uniform the electrode temperature is along its length. And also, in some cases one end of the electrode is embedded in the slug metal; it is then desirable to know how much heat flows by conduction from the electrode into the slug.
Date:
August 3, 1944
Creator:
Schlegel, R.
System:
The UNT Digital Library
Transference and Adsorption on Glass of Carrier Free Zirconium
.Technical report describing the transference experiments. The carrying of zirconium and columbium by ferric hydroxide has a very marked dependence on pH. In the experiments it was noticed that the concentration of Zr activity in various solutions changed with time This indicated that the Zr was being adsorbed on the glass. The carrier free trace is adsorbed on glass. This effect must be considered in experiments with Zr tracer in glass apparatus.
Date:
January 3, 1945
Creator:
Dodgen, H. W. & Rollefson, G. F.
System:
The UNT Digital Library
Knock-Limited Blending Characteristics of Benzene, Toluene, Mixed Xylenes, and Cumene in an Air-Cooled Cylinder
"An investigation was conducted to determine the knock-limited blending characteristics of leaded fuels containing selected aromatic fuel components (benzene, toluene, mixed xylenes, and cumene). Each of the aromatics was blended with an alkylate blending agent and with a virgin base stock. The blending characteristics of the resulting fuels were determined in a full-scale aircraft-engine cylinder" (p. 1).
Date:
February 3, 1945
Creator:
Hensley, Reece V. & Breitwieser, Roland
System:
The UNT Digital Library
Exit water monitoring for slug jacket failure
None
Date:
March 3, 1945
Creator:
O`Conner, J. J.
System:
The UNT Digital Library
Healing of Fast-Neutron-Induced Changes in Graphite. III. Further Experiments on Effect of Heating During Exposure
Abstract. It has been established that heating samples of graphite during exposure in a pile decreases substantially the observed changes in the elastic modulus and electrical resistance caused by the irradiation. The functional relationship between the percentage changes observed and the temperature of exposure resembles the relationship between the final percentage changes and the temperature of heat treatment after exposure (cf. report CC-1668). Anomalous results reported previously for higher temperatures in CC01669 are now shown to be attributable to a destructive influence on the graphite, probably oxidation of samples exposed in air.
Date:
March 3, 1945
Creator:
Neubert, T. J.; Novick, A.; Schenek, R. T.; Shapiro, E. & Van Dyken, A. R.
System:
The UNT Digital Library
The Effect of Mach Number on the Aerodynamic Characteristics of a Single-Engine Pursuit Airplane as Determined From Tests of a 1/3-Scale Model
Report discussing the effects of Mach number on the aerodynamic characteristics of an Allison powered single-engine pursuit airplane. Information about the lift, drag, pitching-moment characteristics, stability, tail effectiveness, and elevator effectiveness with Mach number is provided.
Date:
May 3, 1945
Creator:
Robinson, Robert C. & Jessen, Henry
System:
The UNT Digital Library
Endurance Tests of a 22-Inch-Diameter Pulse-Jet Engine With a Neoprene-Coated Valve Grid
Report discussing the results of testing to determine the operating life of a 22-inch-diameter pulse-jet engine equipped with a neoprene-coated valve grid. The valve grid was found to extend the operating life and only reduced the performance slightly.
Date:
October 3, 1945
Creator:
Manganiello, Eugene J.; Valerino, Michael F. & Breisch, John H.
System:
The UNT Digital Library
July 16th nuclear explosion: Permanent earth displacement
A measurement was made of the permanent earth movement in the neighborhood of the tower caused by the nuclear explosion at Trinity. The crater was apparently formed by a compression phenomenon and was noted to be much shallower than craters formed by ordinary high explosives. Scaling up existing information on the radius of craters, the TNT equivalence of the nuclear bomb is given as 10,000 tons to within 50 percent. Observations were made on the damage in the crater region and suggestions are given as to the nature of structure which might be expected to withstand the blast close to the gadget. It is also noted that, despite previous opinion to the contrary, it is apparently possible to reduce greatly the volume of earth blown away by the blast by suitably protecting the ground.
Date:
October 3, 1945
Creator:
Reines, F.
System:
The UNT Digital Library