UNT Libraries Government Documents Department - 8,727 Matching Results

Search Results

prev Results: 73 - 96 next
open access

MSTS Multiphase Subsurface Transport Simulator User's Guide and Reference

Description: This User's Guide and Reference provides information and instructions on the use of the Multiphase Subsurface Transport Simulator (MSTS) code and the associated MSTS Graphical Input. The MSTS code is used to simulate water flow, air flow, heat transfer, and dilute species mass transport in variably saturated geologic media for one, two, or three dimensions using an integrated finite-difference numerical scheme. Any or all of these processes may be simulated in a fully coupled manner. MSTS is a … more
Date: May 1, 1993
Creator: Nichols, W. E. & White, M. D.
Item Type: Refine your search to only Report
open access

(Research in elementary particles and interactions). [1992]

Description: Research of the Yale University groups in the areas of elementary particles and their interactions are outlined. Work on the following topics is reported: development of CDF trigger system; SSC detector development; study of heavy flavors at TPL; search for composite objects produced in relativistic heavy-ion collisions; high-energy polarized lepton-nucleon scattering; rare K{sup +} decays; unpolarized high-energy muon scattering; muon anomalous magnetic moment; theoretical high-energy physics … more
Date: May 1, 1992
Creator: Adair, R.; Sandweiss, J. & Schmidt, M.
Item Type: Refine your search to only Report
open access

Conditioner for a helically transported electron beam

Description: The kinetic theory is developed to investigate a conditioner for a helically imported electron beam. Linear expressions for axial velocity spread are derived. Numerical simulation is used to check the theoretical results and examine nonlinear aspects of the conditioning process. The results show that in the linear regime the action of the beam conditioner on a pulsed beam mainly depends on the phase at which the beam enters the conditioner and depends only slightly on the operating wavelength. … more
Date: May 1, 1992
Creator: Wang, C.
Item Type: Refine your search to only Article
open access

Evaluations of the effects of the Columbia River on the unconfined aquifer beneath the 1301-N Liquid Waste Disposal Facility

Description: Westinghouse Hanford Company (WHC) requested that Pacific Northwest Laboratory (PNL) perform a study to determine what influence the Columbia River has on the aquifer beneath the 1301-N Liquid Waste Disposal Facility (LWDF) located in the 100-N Area. Because of the change in operational status of the N Reactor to dry layup'' in November 1989, there has been a reduction in the liquid effluent discharge to the ground in the 100-N Area. This reduction in discharge reduces the artificial … more
Date: May 1, 1990
Creator: Gilmore, T. J.; Borghese, J. V.; McDonald, J. P. & Newcomer, D. R.
Item Type: Refine your search to only Report
open access

High spectral resolution measurements for the ARM Program

Description: This report focuses on the design and fabrication of high spectral resolution FTIR (Fourier Transform Infrared) instrumentation for the CART sites of the Atmospheric Radiation Measurement (ARM) Program. The ultimate objective of this grant is to develop three different types of instruments, named the AERI, AERI-X, and SORT. The Atmospheric Emitted Radiance Interferometer (AERI) is the simplest. It will be available for early deployment at the first ARM site and will be deployable at several loc… more
Date: May 22, 1992
Creator: Revercomb, H. E.
Item Type: Refine your search to only Report
open access

On-line gas chromatographic studies of rutherfordium (Element 104), hahnium (Element 105), and homologs

Description: Gas-phase isothermal chromatogaphy is a method by which volatile compounds of different chemical elements can be separated according to their volatilities. The technique, coupled with theoretical modeling of the processes occurring in the chromatogaphy column, provides accurate determination of thermodynamic properties (e.g., adsorption enthalpies) for compounds of elements, such as the transactinides, which can only be produced on an atom-at-a-time basis. In addition, the chemical selectivity … more
Date: May 1, 1993
Creator: Kadkhodayan, B.
Item Type: Refine your search to only Report
open access

Internal variables in the local-equilibrium approximation

Description: We explore the basis and consequences of the formalism known in the literature as the method of local equilibrium. Contemporary controversies regarding the foundations of thermodynamics are rooted not only in different sets of concepts and principles, but also in semantics. An attempt is made here to use a consistent group of terms, each of whose dictionary meaning corresponds to its physical nature as closely as possible. Since the intention is to study irreversible processes in systems in whi… more
Date: May 1, 1992
Creator: Kestin, J.
Item Type: Refine your search to only Article
open access

Theoretical plasma physics. [College of William and Mary]

Description: Work during the past year in the areas of classical and anomalous transport, three-dimensional equilibria, divertor physics, and diagnostic techniques using waves is reported. Although much work has been done on classical transport, the validity of the guiding-center drift equations, which are the basis of much of the theory, has received little attention. The limitations of the drift approximation are being studied. Work on three-dimensional equilibria, which shows that quasi-helical symmetry … more
Date: May 1, 1992
Creator: Boozer, A. H. & Vahala, G. M.
Item Type: Refine your search to only Report
open access

Integrated dry NO sub x /SO sub 2 emissions control system

Description: The DSI system design is approximately eighty percent completed. About eighty percent of the materials have been purchased for erection and setup of the DSI system. Most of the equipment and supply purchases have been made for the DCS. The Unit 4 outage started March 20, 1992 for the installation of the remaining project equipment. overall field construction activities continued on the flyash, boiler, dry sorbent injection and humidification systems. Noell performed startup and testing activiti… more
Date: May 15, 1992
Item Type: Refine your search to only Report
open access

The ALS Gun Electronics system

Description: The ALS Gun Electronics system has been designed to accommodate gun with a custom made socket and high speed electronics circuit which is capable of producing single and multiple electron bunches with time jitters measured at better than 50 PS. The system generates the gated RF signal at ground level before sending it up to the 120 KV-biased gun deck via a fiber optic cable. The current pulse width as a function of grid bias, using an Eimac 8847A planar triode simulating an electron gun, was me… more
Date: May 1, 1993
Creator: Lo, C. C.
Item Type: Refine your search to only Article
open access

Stochastic diffusion and Kolmogorov entropy in regular and random Hamiltonians

Description: The scalings of the E x B turbulent diffusion coefficient D and the Kolmogorov entropy K with the potential amplitude {phi} {sup {approximately}} of the fluctuation are studied using the geometrical analysis of closed and extended particle orbits for several types of drift Hamiltonians. The high-amplitude scalings , D {proportional to} {phi} {sup {approximately} 2} or {phi} {sup {approximately} 0} and K {proportional to} log {phi} {sup {approximately}}, are shown to arise from different forms o… more
Date: May 1, 1992
Creator: Isichenko, M. B.; Horton, W.; Kim, D. E.; Heo, E. G. & Choi, D. I.
Item Type: Refine your search to only Report
open access

Summary of TFTR (Tokamak Fusion Test Reactor) diagnostics, including JET (Joint European Torus) and JT-60

Description: The diagnostic instrumentation on TFTR (Tokamak Fusion Test Reactor) and the specific properties of each diagnostic, i.e., number of channels, time resolution, wavelength range, etc., are summarized in tables, grouped according to the plasma parameter measured. For comparison, the equivalent diagnostic capabilities of JET (Joint European Torus) and the Japanese large tokamak, JT-60, as of late 1987 are also listed in the tables. Extensive references are given to publications on each instrument.
Date: May 1, 1990
Creator: Hill, K. W.; Young, K. M. & Johnson, L. C.
Item Type: Refine your search to only Report
open access

Semiconductor electrochemistry of coal pyrite

Description: This project seeks to advance the fundamental understanding of the physicochemical processes occurring at the pyrite/aqueous interface, in the context of coal cleaning, coal desulfurization, and acid mine drainage. A novel approach to the study of pyrite aqueous electrochemistry is proposed, based on the use of both synthetic and natural (i.e. coal-derived) pyrite specimens, the utilization of pyrite both in the form of micro (i.e. colloidal and subcolloidal) and macro (i.e. rotating ring disk)… more
Date: May 1, 1992
Creator: Osseo-Asare, K.
Item Type: Refine your search to only Report
open access

Snake River Sockeye Salmon (Oncorhynchus Nerka) Habitat/Limnologic Research : Annual Report 1992.

Description: This report outlines long-term planning and monitoring activities that occurred in 1991 and 1992 in the Stanley Basin Lakes of the upper Salmon River, Idaho for the purpose of sockeye salmon nerka) recovery. Limnological monitoring and experimental sampling protocol, designed to establish a limnological baseline and to evaluate sockeye salmon production capability of the lakes, are presented. Also presented are recommended passage improvements for current fish passage barriers/impediments on mi… more
Date: May 1, 1993
Creator: Spaulding, Scott
Item Type: Refine your search to only Report
open access

FLASH: A finite element computer code for variably saturated flow

Description: A numerical model was developed for use in performance assessment studies at the INEL. The numerical model, referred to as the FLASH computer code, is designed to simulate two-dimensional fluid flow in fractured-porous media. The code is specifically designed to model variably saturated flow in an arid site vadose zone and saturated flow in an unconfined aquifer. In addition, the code also has the capability to simulate heat conduction in the vadose zone. This report presents the following: des… more
Date: May 1, 1992
Creator: Baca, R. G. & Magnuson, S. O.
Item Type: Refine your search to only Report
open access

Edge ion dynamics in H-mode discharges in DIII-D

Description: The goal of this paper is to present detailed measurements of T{sub i} and E{sub r} at the plasma edge in L- and H-mode with high spatial resolution in order the study the edge ion dynamics. Of primary interest is the relationship between T{sub i} and E{sub r} and the behavior of the edge T{sub i} profile in H-mode. The principle findings are: there appears to be a threshold temperature for T{sub i} required for the transition to occur with T{sub i} at the LCFS in the range of 0.2--0.3 keV at t… more
Date: May 1, 1992
Creator: Groebner, R. J.; Burrell, K. H.; Gohil, P.; Kim, J. & Seraydarian, R. P.
Item Type: Refine your search to only Article
open access

Image accuracy and representational enhancement through low-level, multi-sensor integration techniques

Description: Multi-Sensor Integration (MSI) is the combining of data and information from more than one source in order to generate a more reliable and consistent representation of the environment. The need for MSI derives largely from basic ambiguities inherent in our current sensor imaging technologies. These ambiguities exist as long as the mapping from reality to image is not 1-to-1. That is, if different 44 realities'' lead to identical images, a single image cannot reveal the particular reality which … more
Date: May 1, 1993
Creator: Baker, J. E.
Item Type: Refine your search to only Report
open access

Climate change and water supply, management and use: A literature review

Description: There is evidence that atmospheric concentrations Of C0{sub 2}, tropospheric 0{sub 3}, and CH{sub 4}, among other gases that contribute to the greenhouse effect, have increased in recent decades, and that these changes may induce changes in global air temperatures and regional climate features in coming years. A literature review was conducted to sample the literature base on which our understanding of the water resource impacts of climate change rests. Water resource issues likely to be import… more
Date: May 1, 1992
Creator: Chang, L. H.; Draves, J. D. & Hunsaker, C. T.
Item Type: Refine your search to only Report
open access

Free energy in plasmas under wave-induced diffusion

Description: When waves propagate through a bounded plasma, the wave may be amplified or damped at the expense of the plasma kinetic energy. In many cases of interest, the primary effect of the wave is to cause plasma diffusion in velocity and configuration space. In the absence of collisions, the rearrangement of the plasma conserves entropy, as large-grain structures are mixed and fine-grain structures emerge. The maximum extractable energy by waves so diffusing the plasma is a quantity of fundamental int… more
Date: May 1, 1993
Creator: Fisch, N. J. (Princeton Univ., NJ (United States). Plasma Physics Lab.) & Rax, J. M. (CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France))
Item Type: Refine your search to only Report
open access

Differential equation-based seismic data filtering

Description: Suppressing noise and enhancing useful seismic signal by filtering is one of the important tasks of seismic data processing. conventional filtering methods are implemented through either the convolution operation or various mathematical transforms. In this paper, we describe a methodology for studying and implementing filters, which, unlike those conventional filtering methods, is based on solving differential equations in the time and space domain. We call this kind of filtering differential e… more
Date: May 1992
Creator: Li, Jianchao & Larner, K.
Item Type: Refine your search to only Report
open access

Initial boronization of PBX-M using ablation of solid boronized probes

Description: The initial boronization of PBX-M was performed using the sequential ablation of two types of solid target probes. Probe-1 in a mushroom shape consisted of a 10.7% boronized 2-D C-C composite containing 3.6 g of boron in a B[sub 4]C binder. Probe-2 in a rectangular shape consisted of an 86% boronized graphite felt composite containing 19.5 g of 40 [mu] boron particles. After boronization with Probe-1, the loop voltage during 1 MW neutral beam heated plasmas decreased 27% and volt-sec consumptio… more
Date: May 1, 1993
Creator: Kugel, H. W.; Hirooka, Y.; Kaita, R.; Kaye, S.; Khandagle, M. (California Univ., Los Angeles, CA (United States). Inst. of Plasma and Fusion Research); Timberlake, J. et al.
Item Type: Refine your search to only Report
open access

The effect of selective absorption on coal conversion, October--December 1991

Description: The objectives of this report are to (1) determine the importance of the presence of added hydrogen donor compounds within the coal in the first stage of direct liquefaction processes; (2) determine the composition of the solvent absorbed by and present within the coal in the first stage of direct coal liquefaction.
Date: May 1, 1992
Creator: Larsen, J. W.; Lazarov, L. & Amui, J.
Item Type: Refine your search to only Report
open access

Synthesis and properties of novel cluster phases. [LiMo sub 3 Se sub 3]

Description: Research on cluster compounds this period (past periods covered such compounds such as NbMTe{sub 2}, TaFe{sub 1.25}Te{sub 3}, Nb{sub 3}SiTe{sub 6}, etc.) was concentrated on LiMo{sub 3}Se{sub 3}. A LiMo{sub 3}Se{sub 3} bundle {approximately} 70 nm wide was grown on a holey carbon substrate; STEM was used to resolve individual 6 {angstrom} wires, and the Mo{sub 3}Se{sub 3} flat ''monomer'' units is resolved at 2.3 {angstrom} (Mo atoms wrapped in Se atoms). Inorganic-organic polymer composites ar… more
Date: May 15, 1992
Creator: DiSalvo, F.
Item Type: Refine your search to only Report
Back to Top of Screen