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Pion correlations as a function of atomic mass in heavy ion collisions

Description: The method of two pion interferometry was used to obtain source-size and lifetime parameters for the pions produced in heavy ion collisions. The systems used were 1.70 {center dot} A GeV {sup 56}Fe + Fe, 1.82 {center dot} A GeV {sup 40}Ar + KCl and 1.54 {center dot} A GeV {sup 93}Nb + Nb, allowing for a search for dependences on the atomic number. Two acceptances (centered, in the lab., at {approximately} 0{degrees} and 45{degrees}) were used for each system, allowing a search for dependences on the viewing angle. The correlation functions were calculated by comparing the data samples to background (or reference) samples made using the method of event mixing, where pions from different events are combined to produce a data sample in which the Bose-Einstein correlation effect is absent. The effect of the correlation function on the background samples is calculated, and a method for weighting the events to remove the residual correlation effect is presented. The effect of the spectrometer design on the measured correlation functions is discussed, as are methods for correcting for these effects during the data analysis. 58 refs., 39 figs., 18 tabs.
Date: November 26, 1989
Creator: Chacon, A.D.
Partner: UNT Libraries Government Documents Department
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SOLUBLE NEUTRON POISONS AS A PRIMARY CRITICALITY CONTROL IN SHIELDED AND CONTAINED RADIOCHEMICAL FACILITIES

Description: Studies indicated that the use of soluble poisons as a primary criticality control offers economic and other advantages in that it permits the factors of vessel size and shape and solution concentrations to be dictated by considerations other than those of criticality. It is believed that soluble poison criticality control can be made as reliable as other methods of coaditional control if the application is preceded by adequate development work and is monitored by multiple. independent safeguards. The studies included multigroup machine calculations of the required content of poisons in solutions of fissile and fertile material, a compilation of data on the detection, stability, decontamination, and costs of soluble poisons, and an assessment of the possible effects of a nuclear excursion. (auth)
Date: July 26, 1962
Creator: Nichols, J.P.
Partner: UNT Libraries Government Documents Department
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Chemical Technology Division, Unit Operations Section Monthly Progress Report, May 1961

Description: The experimental results on the oxidation of H from a He stream with CuO pellets were very close to the predicted behavior based on the mathematical model. Experimental measurements of uranyl sulfate loading rates on chloride equilibrated resin showed little variation with solution concentrations. A tentative flowsbeet was proposed for cost analysis of processing a Pebble Bed Reactor. A U-Zr plate was dissolved in nitrate-free Zirflex solution. An authentic TRIGA prototype was processed in engineering-scale equipment. Three 4- stage leacher model dissolution runs were made, two of which used 8 M HNO/sub 3/ and one used 4 M HNO/sub 3/. Flooding rates and holdup data were obtained for sieve plate pulse columns under 5% TBP - l.8 Mi Al(NO/sub 3/)/sub 3/ flowsheet conditions. A Purex waste calcination run (R-37) was made using sodium anid imagnesium to reduce sulfate volatility. (auth)
Date: December 26, 1961
Creator: Whatley, M. E.; Haas, P. A.; Horton, R. W.; Ryon, A. D.; Suddath, J. C. & Watson, C. D.
Partner: UNT Libraries Government Documents Department
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The New Left: Students for a Democratic Society, A Supplement

Description: This report discusses Students for a Democratic Society (SDS) and their Marxist views and activities aimed at uniting students and workers. Splinter factions of SDS which staged violent protests in Chicago in the summer of 1969 are discussed in detail along with a prognosis on their likely levels of success in recruiting more students to their cause.
Date: November 26, 1969
Creator: Jones, Richard S.
Partner: UNT Libraries Government Documents Department
open access

The Operation of Congress: A Selected Bibliography

Description: This report provides a bibliography of resources related to the operation of Congress.
Date: June 26, 1970
Creator: Oleszek, Walter J.
Partner: UNT Libraries Government Documents Department
open access

NIGHTMARE-AN IBM 7090 CODE FOR THE CALCULATION OF GAMMA HEATING IN CYLINDRICAL GEOMETRY

Description: The NIGHTMARE program calculates the gamma-dose rate at any point in or near a reactor by means of the NDA buildup-factor method. The source distributton is obtained from a two-group, two-dimensional diffusion code (EQUIPOISE-2). Seven gamma-energy groups are used. As many as nine different concentric cylindrical regions may be considered, but only radial variation of attenuation and buildup properties is permdtted. Two schemes of estimating buildup factors through a succession of materials are built into the code, and results may be obtained by using either or both methods. An IBM 7090 computer wtth seven tape untts is required. Computations are performed at the approximate rate of l0,000/n mesh points per minute, where n is the number of axial, radial, and angular increments. The program is run under the control of the IBM 7090 MONITOR system. (auth)
Date: February 26, 1962
Creator: Tobias, M.L.; Vondy, D.R. & Lietzke, M.P.
Partner: UNT Libraries Government Documents Department
open access

WAS Release 4 - Usability Test Results

Description: This report discusses the usability test results for the Web-at-Risk project at the University of North Texas (UNT). Usability testing of the Web Archiving Service (WAS) Release 4 was conducted on May 29, 2007. Eight of the project's curators participated in test sessions, which generally were completed in 45-60 minutes. Two testing teams, each consisting of a facilitator and two observers were involved in testing.
Date: June 26, 2007
Creator: Murray, Kathleen R.
Partner: UNT Libraries
open access

Conspray dynamic sleeve piston coal feeder. Phase II. Verification tests. Final technical report

Description: This report details the performance of Phase II: Verification Tests of the Conspray dynamic sleeve piston coal feeder. The machine performed for 200 hours at 700 psi backpressure, utilizing a 70% to 200 mesh Utah bituminous coal as feedstock. All test work was satisfactorily completed. A post-test inspection was performed. A report of component wear and failures incurred in testing is included as well as suggestions for machine upgrades. The overall conclusion is that the dynamic sleeve piston feeder has proven its ability to operate safely and reliably. When problems have occurred, the machine has demonstrated inherent safety by shutting down without endangering process or personnel. With the recommended improvements incorporated into the feeder, the unit will be ready for installation on a pilot scale coal gasifier. 9 figures, 11 tables.
Date: January 26, 1984
Partner: UNT Libraries Government Documents Department
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Steady State Load Tests. Test Results T-554927

Description: Tests were performed to obtain station performance data at various steady-state generator loads. The station 0 was operated for four-hour periods at steady state conditions and levels of 5, 21, 42, and 61 Mw gross generator output. The various readings are presented in tabular form. A list is given of equipment in service during the test. All plant components operated satisfactorily during the test. (M.C.G.)
Date: May 26, 1961
Partner: UNT Libraries Government Documents Department
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Survey of Nonmetallic Liquid Coolants for Nuclear-Power Piles

Description: A comprehensive survey of the literature was made in an effort to identify nonmetallic materials of possible usefulness as liquid coolants. Materials having maximum melting points of 1000 deg F and boiling points of l200 deg F were considered, but boiling points above 2200 deg F were preferred. Melting points, boiling points, densities, heat capacities, and thermal conductivities were tabulated. Approximately 190 materials appeared to have melting and boiling temperatures in a suitable range. A paucity of thermal- conductivty and heat-capacity data prevented further estimates of suitability of all but nine of these materials. Of these nine nonmetallics, only sodium hydroxide appeared to offer possibilities when considered according to the NEPA formula. (M.C.G.)
Date: May 26, 1950
Creator: Shaw, H.L. & Boulger, F.W.
Partner: UNT Libraries Government Documents Department
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Nonproliferation and Threat Reduction Assistance: U.S. Programs in the Former Soviet Union

Description: This report focuses on funding for threat reduction and nonproliferation programs in the states of the former Soviet Union. Although the United States has expanded its efforts to programs that seek to assist other nations in securing nuclear, biological, and chemical weapons materials, the overwhelming majority of U.S. funds still support programs in the former Soviet states. Nevertheless, because U.S. funding and focus has shifted in recent years, this report provides only a partial view of U.S. nonproliferation and threat reduction programs.
Date: April 26, 2011
Creator: Woolf, Amy F.
Partner: UNT Libraries Government Documents Department
open access

Tevatron I: Large Bore Quad lamination analysis

Description: Stacking, compression, and welding of the laminations for the TeV I Large Bore Quad results in a deformation due to springback which is unacceptable due to magnetic field requirements. ANSYS has been used to analyze a solution to this problem.
Date: October 26, 1982
Creator: Leininger, M.
Partner: UNT Libraries Government Documents Department
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F-35 Joint Strike Fighter (JSF) Program: Background and Issues for Congress

Description: The F-35 Joint Strike Fighter (JSF), also called the Lighting II, is a new strike fighter being procured in different versions by the Air Force, Marine Corps, and Navy. The F-35 program is the Department of Defense's (DOD's) largest weapon procurement program in terms of total estimated acquisition cost. This report details the Obama Administration's proposed FY2010 defense budget requests for F-35 program funding and outlines the issues that Congress must consider when deciding whether to approve, reject, or modify the administration's funding requests.
Date: April 26, 2011
Creator: Gertler, Jeremiah
Partner: UNT Libraries Government Documents Department
open access

Reducing the Budget Deficit: Tax Policy Options

Description: This report begins by reviewing the current fiscal situation. As a percentage of gross domestic product (GDP), revenues remain at historically low levels while spending remains elevated, contributing to budget deficits. The budget deficit in FY2011 is projected to be nearly $1.5 trillion, or 9.8% of GDP. Further, in recent years, the share of the federal budget devoted to mandatory spending has increased, making it difficult, if not impossible, for fiscal sustainability to be achieved through cuts in discretionary spending alone. Large budget deficits continue to contribute to a growing national debt, which, if left unchecked, could undermine future economic growth.
Date: April 26, 2011
Creator: Sherlock, Molly F.
Partner: UNT Libraries Government Documents Department
open access

Regulatable elements in the high-level waste management program

Description: Regulatable elements of a deep geological nuclear waste isolation system are those characteristics of a candidate system which need to be specified to achieve control of its performance. This report identifies the regulatable elements with respect to waste form, repository design, site suitability, and the modeling and decision analysis processes. Regulatable elements in each section are listed and described briefly as they affect the short-term and long-term performance of a deep geological repository.
Date: December 26, 1979
Creator: Oakley, D.
Partner: UNT Libraries Government Documents Department
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DC Gun Laws and Proposed Amendments

Description: In the 112th Congress, Representative Mike Ross introduced H.R. 645, "To restore Second Amendment rights in the District of Columbia." This measure is identical to H.R. 5162 from the previous Congress. This report provides an analysis of the District's firearms laws and congressional proposals.
Date: April 26, 2011
Creator: Chu, Vivian S.
Partner: UNT Libraries Government Documents Department
open access

Executive Branch Reorganization Initiatives During the 112th Congress: A Brief Overview

Description: This report describes the ways that executive branch reorganization can occur as a result of Administration and congressional actions, and describes recent initiatives in the context of that typology. The report concludes with some observations regarding federal reorganization efforts.
Date: May 26, 2011
Creator: Hogue, Henry B.
Partner: UNT Libraries Government Documents Department
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Continuing Resolutions: Latest Action and Brief Overview of Recent Practices

Description: This report is divided into two segments. The first section provides the most recent information on the FY2011 continuing resolution. The second segment focuses on the (1) history and recent trends, including the nature, scope, and duration of CRs during the past 35 years; (2) CR types by duration; (3) major substantive legislative provisions included in some CRs; and (4) funding gaps.
Date: April 26, 2011
Creator: Streeter, Sandy
Partner: UNT Libraries Government Documents Department
open access

Use of a General Nonlinear Least-Squares Curve Fitting Program With Nonclosed Form Relationships. [GNLS, in FORTRAN for CDC Computers]

Description: A use for GNLS, a general nonlinear least-squares curve fitting program, is presented. In this use GNLS determines a set of best parameters for relationships that cannot be written in closed form. This program can be useful for experimenters who need to determine experimental parameters by fitting nonclosed-form relationships to experimental data. Two examples are given to indicate how GNLS can be used for this type of problem. 11 figures.
Date: December 26, 1979
Creator: Abey, A. E.
Partner: UNT Libraries Government Documents Department
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