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Evaluating late detection capability against diverse insider adversaries

Description: This paper describes a model for evaluating the late (after-the-fact) detection capability of material control and accountability (MCandA) systems against insider theft or diversion of special nuclear material. Potential insider cover-up strategies to defeat activities providing detection (e.g., inventories) are addressed by the model in a tractable manner. For each potential adversary and detection activity, two probabilities are assessed and used to fit the model. The model then computes the … more
Date: December 3, 1987
Creator: Sicherman, A.
Partner: UNT Libraries Government Documents Department
open access

Using mathematical models to understand the AIDS spidemic. [None]

Description: The most urgent public health problem today is to devise effective strategies to minimize the destruction caused by the AIDS epidemic. This complex problem will involve medical advances and new public health and education initiatives. Mathematical models based on the underlying transmission mechanisms of the AIDS virus can help the medical/scientific community understand and anticipate its spread in different populations and evaluate the potential effectiveness of different approaches for bring… more
Date: January 1, 1987
Creator: Hyman, J.M. & Stanley, E.A.
Partner: UNT Libraries Government Documents Department
open access

Particle identification for beauty physics

Description: We look briefly at the requirements for particle identification for possible beauty experiments at the Tevatron, both in the fixed target and the collider mode. Techniques presently in use in high energy physics experiments, and under development, should make sensitive experiments feasible. However, in all cases the present state of the art must be advanced to meet the necessary requirements for segmentation andor rate capability. The most fundamentally difficult challenges appear to be the eff… more
Date: January 1, 1987
Creator: Ludlam, T.
Partner: UNT Libraries Government Documents Department
open access

An analysis of residential energy consumption in a temperate climate

Description: Electrical energy consumption data have been recorded for several hundred submetered residential structures in Middle Tennessee. All houses were constructed with a common energy package.'' Specifically, daily cooling usage data have been collected for 130 houses for the 1985 and 1986 cooling seasons, and monthly heating usage data for 186 houses have been recorded by occupant participation over a seven-year period. Cooling data have been analyzed using an SPSSx multiple regression analysis and … more
Date: June 1, 1987
Creator: Clark, Y.Y. & Vincent, W.
Partner: UNT Libraries Government Documents Department
open access

Revised Users Manual, Pulverized Coal Gasification or Combustion: 2-Dimensional (87-PCGC-2): Final Report, Volume 2. [87-PCGC-2]

Description: A two-dimensional, steady-state model for describing a variety of reactive and non-reactive flows, including pulverized coal combustion and gasification, is presented. Recent code revisions and additions are described. The model, referred to as 87-PCGC-2, is applicable to cylindrical axi-symmetric systems. Turbulence is accounted for in both the fluid mechanics equations and the combustion scheme. Radiation from gases, walls, and particles is taken into account using either a flux method or dis… more
Date: December 1, 1987
Creator: Smith, P. J.; Smoot, L. D. & Brewster, B. S.
Partner: UNT Libraries Government Documents Department
open access

Probing the possibility of a /sup 12/C/sup 13/C abundance gradient from observations of interstellar CH/sup +/

Description: I have performed high signal-to-noise (SN /equals/ 300 to 500) observations of interstellar CH/sup /plus// at Lick Observatory and at CTIO of the reddened, early-type stars HD 183143, HD 24432, and HD 157038 in an effort to probe the existence of a /sup 12/C/sup 13/C abundance gradient in our Galaxy.
Date: September 16, 1987
Creator: Hawkins, I.
Partner: UNT Libraries Government Documents Department
open access

Heavy leptons at the SSC

Description: It is argued that detection of heavy leptons at the Superconducting Super Collider seems to be very difficult but perhaps not impossible. The feasibility is shown to depend critically upon the ability to identify events with W's decaying hadronically and missing transverse momentum. (LEW)
Date: December 15, 1987
Creator: Anderson, G. & Hinchliffe, I.
Partner: UNT Libraries Government Documents Department
open access

Physics at hadron colliders: Experimental view

Description: The physics of the hadron-hadron collider experiment is considered from an experimental point of view. The problems encountered in determination of how well the standard model describes collider results are discussed. 53 refs., 58 figs.
Date: August 1, 1987
Creator: Siegrist, J.L.
Partner: UNT Libraries Government Documents Department
open access

Determination of optimum electrolyte composition for molten carbonate fuel cells

Description: The goal of this program is the development of a molten carbonate fuel cell (MCFC) anode which is more tolerant of sulfur contaminants in the fuel than the current state-of-the-art nickel-based anode structures. This program addresses two different but related aspects of the sulfur contamination problem. The primary aspect is concerned with the development of a sulfur tolerant electrocatalyst for the fuel oxidation reaction. A secondary issue is the development of a sulfur tolerant water-gas-sh… more
Date: January 1, 1987
Creator: Yuh, C. Y. & Pigeaud, A.
Partner: UNT Libraries Government Documents Department
open access

Neutral particle beam distributed data acquisition system

Description: A distributed data acquisition system has been designed to support experiments at the Argonne Neutral Particle Beam Accelerator. The system uses a host VAXstation II/GPX computer acting as an experimenter's station linked via Ethernet with multiple MicroVAX IIs and rtVAXs dedicated to acquiring data and controlling hardware at remote sites. This paper describes the hardware design of the system, the applications support software on the host and target computers, and the real-time performance.
Date: January 1, 1987
Creator: Daly, R.T.; Kraimer, M.R. & Novick, A.H.
Partner: UNT Libraries Government Documents Department
open access

Preliminary results from collisions between 3. 2-TeV /sup 16/O and target nuclei of C, Cu, and Au

Description: We have presented preliminary WA80 data from interactions of /sup 16/O with C, Cu, and Au at 60 and 200 GeVnucleon. These have included total charged-particle multiplicity distributions and transverse energy distributions. Ranges of transverse momentum per particle and of possible energy densities were discussed. Some of the unique features of WA80 were stressed. These are: complete coverage of the target rapidity region, complete coverage of charged-particle multiplicity measurement, and measu… more
Date: January 1, 1987
Partner: UNT Libraries Government Documents Department
open access

The geometry of the Virasoro group for physicists

Description: Diff(S/sup 1/), the group of reparametrizations of the circle, is known as the Virasoro group in string theory. Reparametrizations keeping fixed a point of the circle form the quotient space Diff(S/sup 1/)S/sup 1/. The geometry of this space is relevant for string theory and string field theory. We describe this space as an infinite dimensional complex manifold with a Kaehler metric and compute ist Riemann tensor and its Ricci tensor. 7 refs
Date: November 1, 1987
Creator: Zumino, B.
Partner: UNT Libraries Government Documents Department
open access

Preliminary results from Brookhaven Experiment 802 with 14. 5 GeVu /sup 28/Si

Description: Preliminary data on beam calorimetry, charged particle multiplicities, pseudo-rapidity distributions and hadron spectroscopy from /sup 28/Si + Al and Au at 14.5 GeV per nucleon are presented. Comments on nuclear stopping, multiplicity systematics, and K..pi.. ratios are offered. 5 refs., 6 figs., 1 tab.
Date: January 1, 1987
Partner: UNT Libraries Government Documents Department
open access

Enhanced durability and reactivity for zinc ferrite desulfurization sorbent

Description: AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-… more
Date: May 18, 1987
Creator: Jha, M. C.; Baltich, L. K. & Berggren, M. H.
Partner: UNT Libraries Government Documents Department
open access

Active layer hydrology for Imnavait Creek, Toolik, Alaska

Description: The hydrology of the active layer of a watershed is described. In the annual hydrologic cycle, snowmelt is the most significant event at Imnavait Creek located near Toolik Lake, Alaska. Precipitation that has accumulated for more than 6 months on the surface melts in a relatively short period of 7 to 10 days once sustained melting occurs. Significant runoff events are few. Convective storms covering relatively small areas on the North Slope of Alaska can produce significant small-scale events i… more
Date: April 1, 1987
Creator: Hinzman, L.D. & Kane, D.L.
Partner: UNT Libraries Government Documents Department
open access

Results of two-phase natural circulation in hot-leg U-bend simulation experiments

Description: In order to study the two-phase natural circulation and flow termination during a small break loss of coolant accident in LWR, simulation experiments have been performed using two different thermal-hydraulic loops. The main focus of the experiment was the two-phase flow behavior in the hot-leg U-bend typical of BandW LWR systems. The first group of experiments was carried out in the nitrogen gas-water adiabatic simulation loop and the second in the Freon 113 boiling and condensation loop. Both … more
Date: January 1, 1987
Creator: Ishii, M.; Lee, S. Y. & Abou El-Seoud, S.
Partner: UNT Libraries Government Documents Department
open access

Enhanced durability and reactivity for zinc ferrite desulfurization sorbent

Description: AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-… more
Date: August 28, 1987
Creator: Jha, Mahesh C.; Baltich, Linda K. & Berggren, Mark H.
Partner: UNT Libraries Government Documents Department
open access

Injection septum magnets for the Loma Linda medical accelerator

Description: The injection beamline runs over the last magnet before a long straight section and is then displaced downward 55.88 cm to the accelerator beamline. The displacement is magnetic and the final deflection onto the synchrotron orbit is by an electric kicker. The first component, the reverse septum magnet, bends the injection beam 25)degree) downward. This is followed by the injection septum (20)degree) bend upward) and the final injection kicker (5)degree) bend upward). The septum magnets produce … more
Date: September 22, 1987
Creator: Satti, J.A.
Partner: UNT Libraries Government Documents Department
open access

Demonstration projects for coalbed methane and Devonian shale gas: Final report. [None]

Description: In 1979, the US Department of Energy provided the American Public Gas Association (APGA) with a grant to demonstrate the feasibility of bringing unconventional gas such as methane produced from coalbeds or Devonian Shale directly into publicly owned utility system distribution lines. In conjunction with this grant, a seven-year program was initiated where a total of sixteen wells were drilled for the purpose of providing this untapped resource to communities who distribute natural gas. While co… more
Date: April 1, 1987
Creator: Verrips, A.M. & Gustavson, J.B.
Partner: UNT Libraries Government Documents Department
open access

Cyclotrons for clinical and biomedical research with PET

Description: The purpose of this commentary is to present some background material on cyclotrons and other particle accelerators particularly with a view toward the considerations behind acquiring and installing such a machine for purely clinical and/or biomedical research use.
Date: January 1, 1987
Creator: Wolf, A.P.
Partner: UNT Libraries Government Documents Department
open access

MLE (Maximum Likelihood Estimator) reconstruction of a brain phantom using a Monte Carlo transition matrix and a statistical stopping rule

Description: In order to study properties of the Maximum Likelihood Estimator (MLE) algorithm for image reconstruction in Positron Emission Tomographyy (PET), the algorithm is applied to data obtained by the ECAT-III tomograph from a brain phantom. The procedure for subtracting accidental coincidences from the data stream generated by this physical phantom is such that he resultant data are not Poisson distributed. This makes the present investigation different from other investigations based on computer-si… more
Date: October 1, 1987
Creator: Veklerov, E.; Llacer, J. & Hoffman, E.J.
Partner: UNT Libraries Government Documents Department
open access

MTX (Microwave Tokamak Experiment) facility and machine grounding plan

Description: A key issue in the design of fusion research experiments and their related facilities is the control of ground currents. Because of the large magnetic field, high voltages and high currents present in most of these installations, it is essential to avoid ground loops, and to control ground currents during both normal operations and fault conditions. This paper describes the grounding policy that was developed for MTX. The vault area was divided into zones, and each of the four walls was treated… more
Date: October 7, 1987
Creator: Bell, H.H.; Rice, B.W.; Petersen, D.E. & Herrera, C.H.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Radiation Doses from Operation of Postulated Commercial Spent Fuel Transportation Systems

Description: This report contains a system study of estimated radiation doses to the public and workers resulting from the transport of spent fuel from commercial nuclear power reactors to a geologic repository. The report contains a detailed breakdown of activities and a description of time/distance/dose-rate estimates for each activity within the system. Collective doses are estimated for each of the major activities at the reactor site, in transit, and at the repository receiving facility. Annual individ… more
Date: November 1, 1987
Creator: Schneider, K. J.; Hostick, C. J.; Ross, W. A.; Peterson, R. W.; Smith, R. I.; Stiles, D. L. et al.
Partner: UNT Libraries Government Documents Department
open access

Plasma Separation Process: Betacell (BCELL) code: User's manual. [Bipolar barrier junction]

Description: The emergence of clearly defined applications for (small or large) amounts of long-life and reliable power sources has given the design and production of betavoltaic systems a new life. Moreover, because of the availability of the plasma separation program, (PSP) at TRW, it is now possible to separate the most desirable radioisotopes for betacell power generating devices. A computer code, named BCELL, has been developed to model the betavoltaic concept by utilizing the available up-to-date sour… more
Date: November 13, 1987
Creator: Taherzadeh, M.
Partner: UNT Libraries Government Documents Department
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