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AIDS: International Problems and Issues

Description: This issue brief discusses the AIDS (Acquired Immune Deficiency Syndrome) virus and its effects on the world, especially with regard to the welfare of developing nations and various facets of general international relations. Also discussed are the related issues for Congress and U.S. contributions to international AIDS relief efforts led by the World Health Organization (WHO).
Date: January 6, 1988
Creator: McHugh, Lois B.

The Application of Some Hartree-Fock Model Calculation to the Analysis of Atomic and Free-Ion Optical Spectra

Description: Techniques for applying ab-initio calculations to the is of atomic spectra are investigated, along with the relationship between the semi-empirical and ab-initio forms of Slater-Condon theory. Slater-Condon theory is reviewed with a focus on the essential features that lead to the effective Hamiltonians associated with the semi-empirical form of the theory. Ab-initio spectroscopic parameters are calculated from wavefunctions obtained via self-consistent field methods, while multi-configuration Hamiltonian matrices are constructed and diagonalized with computer codes written by Robert Cowan of Los Alamos Scientific Laboratory. Group theoretical analysis demonstrates that wavefunctions more general than Slater determinants (i.e. wavefunctions with radial correlations between electrons) lead to essentially the same parameterization of effective Hamiltonians. In the spirit of this analysis, a strategy is developed for adjusting ab-initio values of the spectroscopic parameters, reproducing parameters obtained by fitting the corresponding effective Hamiltonian. Secondary parameters are used to "screen" the calculated (primary) spectroscopic parameters, their values determined by least squares. Extrapolations of the secondary parameters determined from analyzed spectra are attempted to correct calculations of atoms and ions without experimental levels. The adjustment strategy and extrapolations are tested on the K I sequence from K{sup 0+} through Fe{sup 7+}, fitting to experimental levels for V{sup 4+}, and Cr{sup 5+}; unobserved levels and spectra are predicted for several members of the sequence. A related problem is also discussed: Energy levels of the Uranium hexahalide complexes, (UX{sub 6}){sup 2-} for X= F, Cl, Br, and I, are fit to an effective Hamiltonian (the f{sup 2} configuration in O{sub h} symmetry) with corrections proposed by Brian Judd.
Date: August 6, 1980
Creator: Hayhurst, Thomas Laine

D0 Carriage Roller Bearing Measurements

Description: All of the ordered Tychoway rollers, to be used under the cryostat carriages on the center beam, have to be modified to accommodate a keyed way used to guide the cryostat along these same ways. A 0.320 x 0.406 inch notch is machined along one of the longer lower edges in order to create a 0.640 x 0.406 inch keyway when two of these notched rollers are bolted together (side by side) for installation. This keyway will fit over a .635 x .375 inch key, which is inserted into the ways. Due to the close fit, the rollers were sent to the Fermi Inspection Dept. to double check the machined notch dimensions and tolerances. Included is the drawing sent to the Tychoway manufacturer, who machined the notch, and the results of the measurements taken by the Inspection Dept. The tolerance on the 0.320 inch dimension is {+-} 0.002 inches. Only three of the initial ten rollers fall within the tolerance; No.3, 9 and 10 (they were numbered by the Inspection Dept.). The other seven, plus one of the 'good' rollers, can be matched up to meet the required dimensions of a 0.640 {+-} 0.004 inch keyway. Since only four rollers will be used on the keyed way per cryostat, the worst matches can be installed on the non-keyed side of the cryostat. A table listing the best possible matches and their subsequent dimensions and tolerances is given.
Date: February 6, 1989
Creator: Jaques, Al

Grout Analysis for EC and CC Calorimeters

Description: The EC and CC calorimeters roll on Two parallel hardened steel ways which reside on the top of the D0 platform's center beam. The ways will be grouted to the center beam once their correct elevation has been established. The purpose of this report is to evaluate and compare three different epoxy grouts and their properties for this application.
Date: January 6, 1987
Creator: Engstrom, L.L.

Health Insurance: The Pro-Competition Proposals

Description: For more than a decade, Congress and the Executive Branch have tried to stem spiraling health care costs through various regulatory actions at the Federal and State levels. Planning laws, for example, focus regulatory attention on the capacity of the health care industry to provide health services. Other laws have created programs to monitor and control the use of services provided to individual patients. Direct wage and price controls were applied to the health industry in the early 1970's and in recent years Congress has debated whether to impose controls over hospital spending in the United States. This report discusses the debate surrounding various approaches to lower health care costs.
Date: December 6, 1982
Creator: Lundy, Janet P. & Markus, Glenn

High Voltage Connector

Description: The originally designed high voltage connectors were to be made of brass. However, if treated like a Bellevile spring with the initially given dimensions, the stresses of the connector when crimped were calculated to be much higher than the yield stress of brass. Since the flange and outer diameters of the connector are to remain small, it was necessary to alter the other dimensions and choice of material in order to bring down the stresses applied to the connector.
Date: March 6, 1987
Creator: Kurita, C.H.

Information on a Major New Initiative: Mapping and Sequencing the Human Genome (1986 DOE Memorandum)

Description: In the history of the Human Genome Program, Dr. Charles DeLisi and Dr. Alvin Trivelpiece of the Department of Energy (DOE) were instrumental in moving the seeds of the program forward. This May 1986 memo from DeLisi to Trivelpiece, director of DOE's Office of Energy Research, documents this fact. Following the March 1986 Santa Fe workshop on the subject of mapping and sequencing the human genome, Delisi's memo outlines workshop conclusions, explains the relevance of this project to DOE and the importance of the Department's laboratories and capabilities, notes the critical experience of DOE in managing projects of this scale and potential magnitude, and recognizes the fact that the project will impact biomedical science in ways which could not be fully anticipated at the time. Subsequently, program guidance was further sought from the DOE Health Effects Research Advisory Committee (HERAC) and the April 1987 HERAC report recommmended that DOE and the nation commit to a large, multidisciplinary, scientific and technological undertaking to map and sequence the human genome.
Date: May 6, 1986
Creator: DeLisi, Charles (Associate Director, Heath and Environmental Research, DOE Office of Energy Research)

Outline of status of national seismic stations (NSS) in CTB negotiations

Description: The paper discusses two treaties that are being negotiated: Multilateral Treaty, which bans all nuclear weapon tests and establishes a moratorium on PNEs (Peaceful Nuclear Explosions) for the life of the treaty, and a separate verification agreement, which provides for much more extensive verification measures that does the Multilateral Treaty and to which only the US, UK, and USSR will adhere. On the latter treaty, agreement has been reached that there will be improved seismic stations (NSS) in each country. Discussed are the outstanding general points of agreement or disagreement on NSS; technical characteristics of NSS; and a joint cooperative program for NSS.
Date: May 6, 1980
Creator: Heckrotte, W.

Report on Furukawa Coax #2

Description: This report contains the results of measurements performed on sample coax No.2 from the Furukawa Cable Co. of Japan. Time domain reflectometer (TOR) and RLC measurements were made at room temperature and superconducting. Network analyzer measurements of S11 and S21 were made for the superconducting coax.
Date: December 6, 1984
Creator: Peterson, D.

Some Calculations Pertaining to Central Calorimeter Cooldown Rate and Temperature Gradients

Description: For a first-pass look at how the central calorimeter module assemblies cool down in the CC cryostat, some 'hand' calculations of free convection from the end plates were done. A local convection coefficient for heat transfer from the vertically oriented end plates to the argon gas is estimated to be about 1 x 10{sup -3} W/cm{sup 2}K. Even for free convection, flow is turbulent between the end plates and cryostat wall. Total rate of heat removal from both ends of the assembly at 300K to lOOK argon gas is about 10KW. The maximum end plate temperature gradient based on convection alone (neglecting end plate conduction) is about 3 degree K per centimeter height.
Date: August 6, 1987
Creator: Peterson, T.