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Analytical steam injection model for layered systems
Screening, evaluation and optimization of the steam flooding process in homogeneous reservoirs can be performed by using simple analytical predictive models. In the absence of any analytical model for layered reservoirs, at present, only numerical simulators can be used. And these are expensive. In this study, an analytical model has been developed considering two isolated layers of differing permeabilities. The principle of equal flow potential is applied across the two layers. Gajdica`s (1990) single layer linear steam drive model is extended for the layered system. The formulation accounts for variation of heat loss area in the higher permeability layer, and the development of a hot liquid zone in the lower permeability layer. These calculations also account for effects of viscosity, density, fractional flow curves and pressure drops in the hot liquid zone. Steam injection rate variations in the layers are represented by time weighted average rates. For steam zone calculations, Yortsos and Gavalas`s (1981) upper bound method is used with a correction factor. The results of the model are compared with a numerical simulator. Comparable oil and water flow rates, and breakthrough times were achieved for 100 cp oil. Results with 10 cp and 1000 cp oils indicate the need …
Date:
August 1, 1993
Creator:
Abdual-Razzaq; Brigham, W. E. & Castanier, L. M.
Object Type:
Report
System:
The UNT Digital Library
Computer simulation on the linear and nonlinear propagation of the electromagnetic waves in the dielectric media
In this Letter, we first present a new computer simulation model developed to study the propagation of electromagnetic waves in a dielectric medium in the linear and nonlinear regimes. The model is constructed by combining a microscopic model used in the semi-classical approximation for the dielectric media and the particle model developed for the plasma simulations. The model was then used for studying linear and nonlinear wave propagation in the dielectric medium such as an optical fiber. It is shown that the model may be useful for studying nonlinear wave propagation and harmonics generation in the nonlinear dielectric media.
Date:
August 1993
Creator:
Abe, H. & Okuda, H.
Object Type:
Report
System:
The UNT Digital Library
[RE: Attached Letter and Invitation List]
Photocopy of a memo from Julie Abel, program associate at the Getty Center for Education in the Arts, to the Regional and California Institute Directors. The memo is in regards to an attached letter and invitation list of invitees to the regional funder's meeting, October 9th, 1993. The letter, dated August 9, 1993, is from Vicki Rosenberg, program officer of the Getty Center for Education in the Arts, to Bob Crow, executive director of the Amon G. Carter Foundation, inviting him to the meeting. The Center is hosting the meeting to recognize the partnerships that have grown over the past five years. Another letter, dated the same and also from Vicki Rosenberg is present, but addressed to Mark Constantine, consultant at Jessie Ball duPont Fund and has the same invitation.
Date:
August 10, 1993
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[RE: Attached Letter and Invitation List]
Photocopy of a memo from Julie Abel, program associate at the Getty Center for Education in the Arts, to the Regional and California Institute Directors. The memo is in regards to an attached letter and invitation list of invitees to the regional funder's meeting, October 9th, 1993. The letter, dated August 9, 1993, is from Vicki Rosenberg, program officer of the Getty Center for Education in the Arts, to Bob Crow, executive director of the Amon G. Carter Foundation, inviting him to the meeting. The Center is hosting the meeting to recognize the partnerships that have grown over the past five years. Another letter, dated the same and also from Vicki Rosenberg is present, but addressed to Mark Constantine, consultant at Jessie Ball duPont Fund and has the same invitation.
Date:
August 10, 1993
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Julie Anne Abel to D. Jack Davis, August 9, 1993]
A letter from Julie Anne Abel to D. Jack Davis about enclosing a fully signed copy of the strategic planning grant offer for the North Texas Institute for Educators on the Visual Arts. Attached documents include the planning grant offer, memo and budget.
Date:
August 9, 1993
Creator:
Abel, Julie Anne
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Julie Anne Abel to Mark Elder, August 20, 1993]
A letter from Julie Anne Abel to Mark Elder about an enclosed strategic planning grant payment for the North Texas Institute for Educators on the Arts. The planning grant payment is not attached to the document.
Date:
August 20, 1993
Creator:
Abel, Julie Anne
Object Type:
Letter
System:
The UNT Digital Library
Multidimensional solitons in fiber arrays
We demonstrate that nonlinear optical fiber arrays can support stable soliton-like pulses with finite energy. The bound state that we have found is localized both in time and in a spatial domain in the direction perpendicular to the pulse propagation. We have proved the boundedness of the Hamiltonian function for the array. Finally, numerical studies support our analytical conclusions.
Date:
August 16, 1993
Creator:
Aceves, A. B.; De Angelis, C.; Rubenchik, A. M. & Turitsyn, S. K.
Object Type:
Article
System:
The UNT Digital Library
Spectrofluorometric Probe Method for Examining Preferential Solvation in Binary Solvent Mixtures
Article on spectrofluorometric probe method for examining preferential solvation in binary solvent mixtures.
Date:
August 1, 1993
Creator:
Acree, William E. (William Eugene); Wilkins, Denise C. & Tucker, Sheryl A. (Sheryl Ann)
Object Type:
Article
System:
The UNT Digital Library
Intra-building telecommunications cabling standards for Sandia National Laboratories, New Mexico
This document establishes a working standard for all telecommunications cable installations at Sandia National Laboratories, New Mexico. It is based on recent national commercial cabling standards. The topics addressed are Secure and Open/Restricted Access telecommunications environments and both twisted-pair and optical-fiber components of communications media. Some of the state-of-the-art technologies that will be supported by the intrabuilding cable infrastructure are Circuit and Packet Switched Networks (PBX/5ESS Voice and Low-Speed Data), Local Area Networks (Ethernet, Token Ring, Fiber and Copper Distributed Data Interface), and Wide Area Networks (Asynchronous Transfer Mode). These technologies can be delivered to every desk and can transport data at rates sufficient to support all existing applications (such as Voice, Text and graphics, Still Images, Full-motion Video), as well as applications to be defined in the future.
Date:
August 1, 1993
Creator:
Adams, R. L.
Object Type:
Report
System:
The UNT Digital Library
Chronic Ventricular Sympathectomy : Effects on Myocardial Metabolism
Chronic ventricular sympathectomy elicits changes in the coronary circulation, myocardial oxygen consumption and size of infarction resulting fromcoronary occlusion. These changes indicate a change occurring in the basic metabolism of the heart in response to the removal of its sympathetic nervous input. This hypothesis was tested using two groups of dogs, a shamoperated control and a ventricular sympathectomized group. The sympathectomy procedure was an intrapericardial surgical technique which selectively removes ventricular sympathetic input. Four weeks after surgery, left ventricular tissue samples were obtained and rapidly frozen to -80°C. Selected metabolic variables were then compared between the two groups.
Date:
August 1993
Creator:
Adix Longlet, Nancy J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Instrumentation and Controls Division, Technical Support Department Management Plan, FY 1993--FY 1996
This report describes the organization, key functions, and major activities of the Technical Support Department The Department is the programmatic support element of the Instrumentation and Controls Division. The Department`s primary focus is the support of existing equipment and systems at Oak Ridge National Laboratory that are generally characterized as instrumentation and controls. The support takes the form of repair, calibration, fabrication, field engineering, preventive maintenance, software support, and record keeping.
Date:
August 1, 1993
Creator:
Adkisson, B. P.; Kunselman, C. W.; Effler, R. P.; Miller, D. R.; Millet, A. J. & Stansberry, C. T.
Object Type:
Report
System:
The UNT Digital Library
Backward emission of protons in Au+Au collisions at 11.7 A.GeV/c
We present preliminary results for the emission of target rapidity protons in minimum bias and central 11.7 A.GeV/c Au+Au collisions. The data span the pseudo-rapidity range {vert_bar}{eta}{vert_bar} {le} 0.76 and proton kinetic energy range of 50 {le} E {le} 200 MeV. The slopes of the kinetic energy spectra and dN/d{eta} values for central and minimum bias collisions are strikingly similar. Comparison of the results to results for Si+Au and p+A shows that the shape of the dN/d{eta} distribution is independent of the reaction system or centrality suggesting that the spectator matter does not play a decisive role in determining the shape of the proton distributions at back angles for these systems at AGS energies.
Date:
August 1, 1993
Creator:
Ahle, L.; Akiba, Y. & Beavis, D.
Object Type:
Article
System:
The UNT Digital Library
Angular response characterization of the Martin Marietta Energy Systems, Inc., personnel dosimeter
An evaluation of the Martin Marietta Energy Systems, Inc., personnel dosimeter to radiation incident from non-perpendicular angles was carried out to meet the Department of Energy Laboratory Accreditation Program (DOELAP) requirements. Dosimeters were exposed to six different radiation sources. For each source, dosimeters were rotated about their horizontal and vertical axes at seven different angles each. Raw readings were processed through the dose calculation algorithm used for routine personnel dosimetry to determine dose equivalent values. Dose equivalent responses relative to zero degree incident angle were found to be within {plus_minus} 20% for M150, K-59 and {sup 137}Cs photons when the incident angle was 60{degree} or less. For low-energy photon irradiations (M30 and K-16), responses for angles other than perpendicular incidence are generally unpredictable. Reasons include: (1) failure of dose calculation algorithm to identify the radiation field correctly due to unusual element ratios; and (2) at extreme angles ({plus_minus} 85{degree}), the dosimeter design (in relation to the irradiation geometry) becomes the limiting factor in producing reproducible results. Response to {sup 204}Tl beta particles decreases rapidly with increasing angle of incidence.
Date:
August 1, 1993
Creator:
Ahmed, A. B.; McMahan, K. L. & Colwell, D. S.
Object Type:
Report
System:
The UNT Digital Library
Electroweak physics at the Tevatron collider
Preliminary results on electroweak physics from the 1992--1993 run with the CDF and D0 detectors at the Tevatron collider are presented. New measurements of the ratio of the W and Z production cross sections times the branching fractions for subsequent decay into leptons are shown. The W width, {Gamma}(W), and a limit on the top-quark mass independent of decay mode are extracted. The status of a measurement of the charge asymmetry of electrons from W decay is given. Also shown are a study of diboson (W{gamma}, Z{gamma} and WZ) production and a search for a new neutral gauge boson (Z{prime}).
Date:
August 1, 1993
Creator:
Aihara, H.
Object Type:
Article
System:
The UNT Digital Library
Specific systems studies of battery energy storage for electric utilities
Sandia National Laboratories, New Mexico, conducts the Utility Battery Storage Systems Program, which is sponsored by the US Department of Energy`s Office of Energy Management. As a part of this program, four utility-specific systems studies were conducted to identify potential battery energy storage applications within each utility network and estimate the related benefits. This report contains the results of these systems studies.
Date:
August 1, 1993
Creator:
Akhil, Abbas A.; Lachenmeyer, Lana; Jabbour, S. J. & Clark, H. K.
Object Type:
Report
System:
The UNT Digital Library
Characteristics of Administrative Leadership Behavior : A Comparative Study of Municipal and University Administrators
The problem with which this study is concerned is comparative administrative leadership behavior between municipal and university administrators. The specially designed survey instrument elicited respondents' perceptions of their administrative leadership behavior based on the 12 dimensions of the Leader Behavior Description Questionnaire- XII.
Date:
August 1993
Creator:
Akidi, Valentine E. (Valentine Emeka)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Process waste assessment: Black and white print/film processing and photomechanical transfer (PMT). Final report
This process waste assessment was performed to determine quantitatively the chemicals and materials used in the black and white print/film process, to determine their ultimate destination, and to explore options for reduced usage. It was determined that the volume of materials and water used for this process can be reduced; however, there would be significant restrictions on the types of reproductions available to customers. The process cannot be eliminated because of the classified artwork requirements.
Date:
August 1, 1993
Creator:
Albers, D. L.
Object Type:
Report
System:
The UNT Digital Library
Process waste assessment: Kodalith/contact print processing. Final report
This process waste assessment was performed to determine quantitatively the chemicals used in the Kodalith/contact printing process, to determine their ultimate destination, and to explore options for reduced usage. It was discovered that, because of increased use of computer graphics, the volume of chemicals used for this process has been greatly diminished; however, limited technology precludes total elimination of the Kodalith process. Of three options explored, only the purchase of a laser printer that would decrease Kodalith requirements by 60% seems presently feasible.
Date:
August 1, 1993
Creator:
Albers, D. L.
Object Type:
Report
System:
The UNT Digital Library
Synchronous Chaos, Chaotic Walks, and Characterization of Chaotic States by Lyapunov Spectra
Four aspects of the dynamics of continuous-time dynamical systems are studied in this work. The relationship between the Lyapunov exponents of the original system and the Lyapunov exponents of induced Poincare maps is examined. The behavior of these Poincare maps as discriminators of chaos from noise is explored, and the possible Poissonian statistics generated at rarely visited surfaces are studied.
Date:
August 1993
Creator:
Albert, Gerald (Gerald Lachian)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An RS-170 to 700 frame per second CCD camera
A versatile new camera, the Los Alamos National Laboratory (LANL) model GY6, is described. It operates at a wide variety of frame rates, from RS-170 to 700 frames per second. The camera operates as an NTSC compatible black and white camera when operating at RS-170 rates. When used for variable high-frame rates, a simple substitution is made of the RS-170 sync/clock generator circuit card with a high speed emitter-coupled logic (ECL) circuit card.
Date:
August 1, 1993
Creator:
Albright, K. L.; King, N. S. P.; Yates, G. J.; McDonald, T. E. & Turko, B. T.
Object Type:
Article
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 89, No. 34, Ed. 1 Wednesday, August 4, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 4, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 89, No. 35, Ed. 1 Wednesday, August 11, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 11, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 89, No. 36, Ed. 1 Wednesday, August 18, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 18, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 89, No. 37, Ed. 1 Wednesday, August 25, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 25, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History