Collection
Office of Scientific & Technical Information Technical Reports
2,434
USGS Topographic Map Collection
381
Texas Attorney General Opinions
257
Congressional Research Service Reports
216
Texas State Publications
105
Technical Report Archive and Image Library
40
Federal Communications Reports
10
Advisory Commission on Intergovernmental Relations
8
Texas Senate Journals
3
Government Documents General Collection
3
6 More
Serial/Series Title
7.5 Minute Series (Topographic)
193
Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
180
92nd Congress
18
Texas Parks & Wildlife
13
Fiscal Year 1972
12
The Cross Section
12
National Bureau of Standards Reports
11
FCC Reports
10
15 Minute Series (Topographic)
8
Atomic Energy Commission Reports
7
81 More
Country
States
3,466 Matching Results
Results open in a new window/tab.
SAVANNAH RIVER LABORATORY $sup 60$Co POWER AND HEAT SOURCES. Quarterly Progress Report, April--June 1972
None
Date:
December 31, 1972
Creator:
Angerman, C. L.
Object Type:
Report
System:
The UNT Digital Library
IN SITU ACTIVATION ANALYSIS OF MARINE SEDIMENTS WITH $sup 252$Cf
None
Date:
December 31, 1972
Creator:
Wogman, N A; Rieck, Jr, H G; Kosorok, J R & Perkins, R W
Object Type:
Report
System:
The UNT Digital Library
Energy - Uses, Sources, Issues
None
Date:
May 30, 1972
Creator:
Austin, A. L.; Rubin, B. & Werth, G. C.
Object Type:
Report
System:
The UNT Digital Library
FCC Reports, Second Series, Volume 31, August 20, 1971 to October 15, 1971
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
1972
Creator:
United States. Federal Communications Commission.
Object Type:
Report
System:
The UNT Digital Library
Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables
A handbook of mathematical functions that is designed to provide scientific investigations with a comprehensive and self-contained summary of the mathematical functions that arise in physical and engineering problems.
Date:
December 1972
Creator:
Abramowitz, Milton & Stegun, Irene A.
Object Type:
Report
System:
The UNT Digital Library
LIQUID-XENON-FILLED WIRE CHAMBERS
The authors describe several types of small liquid xenon-filled chambers, each optimized for a particular property such as a real-time spatial resolution of {+-} 15 {mu}, a time resolution of {+-} 10{sup -7} sec, or a pulse height of 10{sup -12} coulomb. Larger chambers combining all these properties will be of great value at NAL energies, and they describe some of the techniques necessary for their construction.
Date:
September 1, 1972
Creator:
Derenzo, S.E.; Flagg, R.; Louie, S.G.; Mariam, F.G.; Mast, T.S.; Schwemin, A.J. et al.
Object Type:
Report
System:
The UNT Digital Library
ISOLEUCYL-tRNA SYNTHETASE OF E. coli B. A RAPID KINETIC INVESTIGATION OF THE L-ISOLEUCINE ACTIVATING REACTION
We have investigated the preequilibrium kinetics of the L-isoleucine activation reaction catalyzed by Ile-tRNA synthetase in the presence of a fluorescent reporter group, 2-p-toluidinylnaphthalene-6-sulfonate, using the stopped-flow technique. It is found that of all the reactants involved, L-isoleucine binds slowest to the enzyme, apparently in a two-step process. The kinetics of the reaction are invariant in the presence of co-reactants, whereas the kinetics for ATP are drastically changed in the presence of Mg{sup 2+} ions. The formation of enzyme bound L-isoleucyl {approx} AMP is conveniently followed at dilute concentrations. The value for the rate constant of formation was determined to be 135 sec{sup -1} and of the reverse process to be 670 sec{sup -1} at pH 8.0 25 C. These values are considerably higher than the rate constant 15 sec{sup -1} of the dissociation reaction for L-isoleucine. The value of the kinetically defined equilibrium constant between the ternary Michaelis-Menten complex and the ternary enzyme-product complex indicates that, at equilibrium, the Michaelis-Menten complex is favored. The effect of temperature has been determined, and a tentative interpretation of the thermodynamic parameters is offered. The zero standard enthalpy and positive entropy for binding of L-isoleucine is consistent with hydrophobic interactions, whereas the enzyme-ligand …
Date:
May 1, 1972
Creator:
Holler, E. & Calvin, Melvin
Object Type:
Article
System:
The UNT Digital Library
Transverse Two-Stream Instability in the Presence of Strong Species-Species and Image Forces
The theory of coherent transverse oscillations of two particle species is extended to include strong species-species and image forces. It is shown that in general the species-species force can considerably alter the instability threshold. Conversely, it is shown that the limit on the performance of an electron ring accelerator imposed by the requirement of stable ion electron oscillations, is not significantly improved by the inclusion of images.
Date:
September 1972
Creator:
Laslett, L. J.; Sessler, A. M. & Mohl, D.
Object Type:
Article
System:
The UNT Digital Library
A Liquid Xenon Radiosotope Camera
The increasing availability of short lived gamma and positron emitting isotopes, coupled with the importance of dynamical studies and better imaging, has generated the need for an improved {gamma}-ray camera. The authors discuss a new type of {gamma}-ray camera which makes use of electron avalanches in liquid xenon. A configuration currently under development is shown in Figure 1. The successful operation of a liquid xenon proportional counter was recently reported. The liquid xenon camera promises better spatial resolution and higher counting rate than the existing NaI(Tl) scintillation camera. The spatial resolution for {gamma} rays is in principle limited only by the range of photoelectrons in liquid xenon, which is < 0.2 mm for energies < 1 MeV. A counting rate of 10{sup 6} C/s or more appears possible. As a result of the better resolution and high counting rate capability, the definition of the picture is improved. In addition, the high counting rate capability makes possible dynamic studies which were previously unfeasible. Although they expect the energy resolution with liquid xenon to be superior to that of NaI, the preliminary measurements show 17% FWHM for 279 keV {gamma}'s. Improvements are expected by using better geometry and smoother wire.
Date:
February 1, 1972
Creator:
Zaklad, Haim; Derenzo, Stephen E.; Muller, Richard A.; Smadja,Gerard; Smits, Robert G. & Alvarez, Luis W.
Object Type:
Report
System:
The UNT Digital Library
COLLECTIVE PHENOMENA IN ACCELERATORS
Recent years have witnessed the development of accelerators of ever-larger current, both peak and average, as well as a proliferation of storage rings of ever-greater luminosity. Consequently, there is considerable interest in and growing concern with, the phenomena which limit beam currents and beam densities, namely, the collective modes of behavior of relativistic particle beams. Furthermore, it has been demonstrated that the collective behavior can be controlled, at least to some extent, turned to good advantage, and employed for collective acceleration in devices such as the electron ring accelerator. Quite naturally then, almost every accelerator conference during the last five years has had a review paper on collective effects, while at the same time the number of original papers in this area now exceeds many hundreds. And thus I am faced with the dilemma of being unable to give a comprehensive and complete review (such a review, incidentally, would be most valuable; in my judgment the time is ripe for a comprehensive monograph on the subject.), and yet finding it difficult, in a brief review, to be comprehensible, balanced, and yet fresh. I have resolved the dilemma by firstly supplying sufficient references as to allow the interested reader to readily …
Date:
September 1, 1972
Creator:
Sessler, Andrew M.
Object Type:
Report
System:
The UNT Digital Library
INITIAL IMAGES FROM A 24-WIRE LIQUID XENON Y -CAMERA.
A prototype liquid xenon {gamma}-camera has been constructed and preliminary results obtained. The sensitive volume is 7 c x 7 cm in area and 1.5 cm thick. Orthogonal coordinates for each interacting {gamma}-ray are provided by 24 anode wires 5 {micro} in diameter spaced 2.8 mm apart and 24 cathode strips.
Date:
December 1, 1972
Creator:
Zaklad, Haim; Derenzo, Stephen E.; Muller, Richard A. & Smits,Robert G.
Object Type:
Report
System:
The UNT Digital Library
On the Performance Characteristics of Electron Ring Accelerators
On the basis of our present understanding of the physical phenomena involved in an electron ring accelerator (ERA), a theoretical study is made of the performance which might be expected for an ERA. Rigorous upper bounds are obtained on the rate of energy gain, from which it is shown that, in order to prevent azimuthal instability, parameters must be selected such that (for reasonable fields, injector properties, etc., but with no safety factors) the proton energy gain is less than 80 MeV/m. Numerical examples and approximate formulas are given for the properties of rings satisfying the stability conditions for both azimuthal oscillations and ion-electron oscillations. It is found that for reasonable fields and injector properties, but without safety factors, the useable proton energy gain is less than 45 MeV/m.
Date:
September 1, 1972
Creator:
Mohl, D.; Laslett, L. J. & Sessler, A. M.
Object Type:
Report
System:
The UNT Digital Library
Sources and Uses of Federal Goverment Unified Budget Funds: Fiscal Years 1965-1973
This report contains an explanation of the various sources and uses of federal government unified budget funds, specifically how they have been employed under different presidential administrations.
Date:
February 1, 1972
Creator:
Brite, George K.
Object Type:
Report
System:
The UNT Digital Library
Value Added Tax: A Selected Collection of Recent Literature, with Supplementary References, 1966-1972
This report addresses Value Added Tax and Selected Collection of Recent Literature, with Supplementary Reference from 1966 through 1972.
Date:
March 1972
Creator:
Kohnen, Harold A. & Jones, Russell O.
Object Type:
Report
System:
The UNT Digital Library
Vietnamization: The Program and Its Problems
This report addresses the program and the problems of Vietnamization.
Date:
January 5, 1972
Creator:
Niksch, Larry A.
Object Type:
Report
System:
The UNT Digital Library
Bibliography and Index of U.S. Geological Survey Publications Relating to Coal, 1882-1970
A bibliography that lists about 1,300 U.S. Geological Survey publications related to coal and published prior to January 1, 1971.
Date:
1972
Creator:
Averitt, Paul & Lopez, Lorreda
Object Type:
Report
System:
The UNT Digital Library
Pu, U redistribution in (U,Pu)O/sub 2/ fuels by temperature gradients
A predictive model of the time-dependent evolution of radial Pu/U + Pu gradients in operating nonmolten mixed oxide fuels is being developed. This model is based on preferential evaporation-condensation and vapor transport of metal-bearing species either along cracks and porosity channels within the fuel or inside closed pores migrating up the temperature gradient; equilibrium thermodynamics are applied to calculate the continually changing vapor composition over the hot fuel. Predictions of the model are used in combination with recent in-pile experimental data (from nonmolten mixed oxide fuel pins irradiated in EBR-II from 0.2 to about 11 at. % burnup at varying powers) to delineate the key parameters in radial actinide redistribution. A correlation between fuel stoichiometry (O-to-Pu ratio) and the degree of redistribution (described by an enrichment factor ..gamma../sub Pu/) identified, however, the degree of restructuring of the fuel - as determined by the peak linear power rating, time at this power, and the initial fuel density - also has a strong influence on the final value of ..gamma../sub Pu/. Certain kinetic features of the process and intended modifications to the present model are discussed, and evidence for axial actinide vapor transport in an irradiated annular fuel is also presented.
Date:
August 1, 1972
Creator:
Adamson, M. G. & Aitken, E. A.
Object Type:
Report
System:
The UNT Digital Library
Characterization of an Energy Source for Modeling Hypothetical Core Disruptive Accidents in Nuclear Reactors. First Interim Report. [LMFBR]
The expansion characteristics of the detonation products of a high-explosive energy source used to simulate the pressure-volume change relationships for sodium-vapor expansions during hypothetical core disruptive accidents in a Fast Test Reactor were determined experimentally. Rigid cylinder-piston experiments performed at two scales (ratio 1:3) were undertaken to determine a pressure-volume relationship as a function of source mass and expansion environment. Some of these measurements were compared with code calculations for the source.
Date:
October 1, 1972
Creator:
Cagliostro, D. J. & Florence, A. L.
Object Type:
Report
System:
The UNT Digital Library
Capsule calorimeter development report
A capsule calorimeter has been designed, fabricated, and tested that is capable of measuring the rate of thermal energy generation of a capsule source with an accuracy of plus or minus five percent over a range of 300 watts to 1,000 watts of power. Three operating modes were investigated. The rate of temperature rise mode of operation was found to be the superior operating mode based on accuracy, time cycle, and simplicity of operation. This mode of operation is recommended for use in the encapsulation plant for performing calorimetric determinations on the strontium and cesium capsules that will be produced in the plant. The heat generation data collected by calorimetry will be used for isotopic assay of the capsule sources. The capsule calorimeter is specifically designed for installation into a remotely operated hot cell.
Date:
October 2, 1972
Creator:
Hall, J.C.
Object Type:
Report
System:
The UNT Digital Library
Research and development program, fiscal year 1974
The biomedical program of the Laboratory of Nuclear Medicine and Radiation Biology for Fiscal Year 1974 is conducted within the scope of the following categories: Effects of Radiation of Living Organisms; Molecular and Cellular Radiobiology; Land and Fresh Water Environmental Sciences; Radiological and Health Physics and Instrumentation; and Nuclear Medical Research. (ACR)
Date:
April 1, 1972
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Research in nuclear spectroscopy, x rays, and medium-energy physics. Eighteenth annual report
None
Date:
May 15, 1972
Creator:
Boehm, F.
Object Type:
Report
System:
The UNT Digital Library
LMFBR spent fuel transport: conceptual design and partial safety analysis of a sodium-cooled cask
Conceptual designs for 6- and 18-subassembly casks are presented. The casks are intended for transport of LMFBR spent fuel which has decayed a minimum of 30 days. These casks use sodium as the primary coolant, an auxiliary shield coolant system in normal operation, heavy steel members as both gamma shield and structure, and a eutectic mixture of LiOH and NaOH as a neutron shield. The analysis indicates that there will be no leakage of coolant or fission products under normal or hypothetical accident conditions.
Date:
February 1, 1972
Creator:
Irvine, A.R.; Shappert, L.B.; Evans, J.H. & Canonico, D.A.
Object Type:
Report
System:
The UNT Digital Library
Strontium fluoride flowsheet development studies for the waste packaging program
It was demonstrated that the modified version of the Martin flowsheet can produce SrF/sub 2/ of acceptable quality using a simulated feed of the same composition as the anticipated packaging plant feed. By careful control of operating conditions, strontium losses in the process can be reduced to an acceptable level. Using a nonrepresentative radioactive feed (which contained impurities not present in the simulated feed) high strontium losses were encountered in the feed purification step, although the purification obtained was excellent. The other steps in the process presented no difficulties. Additional tests of the feed purification step will be necessary when a representative feed is available to ensure that strontium losses can be reduced to an acceptable level. The proposed flowsheet differs from the Martin flowsheet in that a feed purification step is used in the proposed process. All the remaining steps in the process are essentially identical and the data and recommendations reported in the Martin publications appear applicable to the proposed process. Based on the results of this study (and including data published by the Martin Company), a detailed flowsheet with recommended operating conditions is given.
Date:
May 25, 1972
Creator:
Fullam, H.T. & Bray, L.A.
Object Type:
Report
System:
The UNT Digital Library
Flexible cubic spline interpolation
This report describes a simple, efficient, and flexible program for cubic spline interpolation in one dimension, suitable for inclusion in the ANL Subroutine Library and in an interactive timesharing system. Most of the cubic spline programs already available either restrict the boundary conditions to knowledge of the first derivative at both end points, or require the second derivatives to vanish at these points. The program described here removes these restrictions and enables the user to adopt boundary conditions appropriate for his own problem. The advantage is demonstrated for the extreme case of interpolating the function x log (1/x), which has singularities in all its derivatives at x = 0.
Date:
March 1, 1972
Creator:
Abu-Shumays, I.K.
Object Type:
Report
System:
The UNT Digital Library