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1-MWE Heat Exchangers for OTEC Final Design Report (open access)

1-MWE Heat Exchangers for OTEC Final Design Report

The design of a 1 MWe OTEC heat exchanger is documented, including the designs of the evaporator and associated systems, condenser, instrumentation, and materials for corrosion/erosion control and fabrication processes. (LEW)
Date: June 19, 1980
Creator: Sprouse, A.M.
Object Type: Report
System: The UNT Digital Library
1/N (open access)

1/N

There exist families of field theories with symmetry group SO(N) (or SU(N)) that become simpler as N becomes larger. More precisely, the solutions to these theories possess an expansion in powers of 1/N. This expansion is the subject of these lectures. The 1/N expansion can be used to analyze model field theories. The 1/N expansion is developed for phi/sup 4/ theory and applied to two two-dimensional models with similar combinatoric structures, the Gross-Neveu model and the CP/sup N-1/ model. These models display (in the leading 1/N approximation) such interesting phenomena as asymptotic freedom, dynamical symmetry breaking, dimensional transmutation, and non-perturbative confinement. It is possible that the 1/N expansion, with N the number of colors, might fruitfully be applied to quantum chromodynamics. Unfortunately, it is not possible to make a decisive test of the approximation, because no one knows how to compute even the first term in the expansion in closed form. However, it is possible to argue that this first term, whatever its detailed form, has many properties that are also shared by the real world, and which are otherwise underived from field theory. These include the saturation of scattering amplitudes by an infinite number of narrow resonances, the essential …
Date: March 1, 1980
Creator: Coleman, S.
Object Type: Report
System: The UNT Digital Library
S-1 project. Volume I. Architecture. 1979 annual report (open access)

S-1 project. Volume I. Architecture. 1979 annual report

The US Navy is one of the world's largest users of digital computing equipment having a procurement cost of at least $50,000, and is the single largest such computer customer in the Department of Defense. Its projected acquisition plan for embedded computer systems during the first half of the 80s contemplates the installation of over 10,000 such systems at an estimated cost of several billions of dollars. This expenditure, though large, is dwarfed by the 85 billion dollars which DOD is projected to spend during the next half-decade on computer software, the near-majority of which will be spent by the Navy; the life-cycle costs of the 700,000+ lines of software for a single large Navy weapons systems application (e.g., AEGIS) have been conservatively estimated at most of a billion dollars. The S-1 Project is dedicated to realizing potentially large improvements in the efficiency with which such very large sums may be spent, so that greater military effectiveness may be secured earlier, and with smaller expenditures. The fundamental objectives of the S-1 Project's work are first to enable the Navy to be able to quickly, reliably and inexpensively evaluate at any time what is available from the state-of-the-art in digital processing …
Date: January 1, 1979
Creator: unknown
Object Type: Report
System: The UNT Digital Library
S-1 project. Volume II. Hardware. 1979 annual report (open access)

S-1 project. Volume II. Hardware. 1979 annual report

This volume includes highlights of the design of the Mark IIA uniprocessor (SMI-2), and the SCALD II user's manual. SCALD (structured computer-aided logic design system) cuts the cost and time required to design logic by letting the logic designer express ideas as naturally as possible, and by eliminating as many errors as possible - through consistency checking, simulation, and timing verification - before the hardware is built. (GHT)
Date: January 1, 1979
Creator: unknown
Object Type: Report
System: The UNT Digital Library
2-D skin-current toroidal-MHD-equilibrium code (open access)

2-D skin-current toroidal-MHD-equilibrium code

A two-dimensional, toroidal, ideal MHD skin-current equilibrium computer code is described. The code is suitable for interactive implementation on a minicomptuer. Some examples of the use of the code for design and interpretation of toroidal cusp experiments are presented.
Date: September 1, 1982
Creator: Feinberg, B.; Niland, R. A.; Coonrod, J. & Levine, M. A.
Object Type: Report
System: The UNT Digital Library
A 3.3 MJ, Rb + 1 driver design based on an integrated systems analysis (open access)

A 3.3 MJ, Rb + 1 driver design based on an integrated systems analysis

A computer model for systems analysis of heavy ion drivers has been developed and used to evaluate driver designs for inertial fusion energy (IFE). The present work examines a driver for a close-coupled target design that requires less total beam energy but also smaller beam spots sizes than previous target designs. Design parameters and a cost estimate for a 160 beam, 3.3 MJ driver using rubidium ions (A = 85) are reported, and the sensitivity of the results to variations in selected design parameters is given.
Date: March 7, 2000
Creator: Meier, W. R.; Barnard, J. J. & Bangerter, R. O.
Object Type: Article
System: The UNT Digital Library
A 3.3 MJ, Rb{sup +1} Driver Design Based on an Integrated Systems Analysis (open access)

A 3.3 MJ, Rb{sup +1} Driver Design Based on an Integrated Systems Analysis

A computer model for systems analysis of heavy ion drivers has been developed and used to evaluate driver designs for inertial fusion energy (IFE). The present work examines a driver for a close-coupled target design that requires less total beam energy but also smaller beam spots sizes than previous target designs. Design parameters and a cost estimate for a 160 beam, 3.3 MJ driver using rubidium ions (A = 85) are reported, and the sensitivity of the results to variations in selected design parameters is given.
Date: September 15, 2000
Creator: Meier, W. R.; Barnard, J. J. & Bangerter, R. O.
Object Type: Article
System: The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming (open access)

3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming

The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date: September 9, 2002
Creator: La Pointe, Paul R. & Hermanson, Jan
Object Type: Report
System: The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, Wind River Reservation, Arapaho and Shoshone Tribes, Wyoming (open access)

3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, Wind River Reservation, Arapaho and Shoshone Tribes, Wyoming

This report describes the results made in fulfillment of contract DE-FG26-00BC15190, ''3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, Wind River Reservation, Arapaho and Shoshone Tribes, Wyoming''. The goal of this project is to improve the recovery of oil from the Tensleep and Phosphoria Formations in Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models. Fields in which natural fractures dominate reservoir permeability, such as the Circle Ridge Field, often experience sub-optimal recovery when recovery processes are designed and implemented that do not take advantage of the fracture systems. For example, a conventional waterflood in a main structural block of the Field was implemented and later suspended due to unattractive results. It is estimated that somewhere less than 20% of the OOIP in the Circle Ridge Field have been recovered after more than 50 years' production. Marathon Oil Company identified the Circle Ridge Field as an attractive candidate for several advanced IOR processes that explicitly take advantage of the natural fracture system. These processes require …
Date: November 18, 2002
Creator: La Pointe, Paul; Hermanson, Jan; Parney, Robert; Eiben, Thorsten; Dunleavy, Mike; Steele, Ken et al.
Object Type: Report
System: The UNT Digital Library
A 3-Dimensional discrete fracture network generator to examine fracture-matrix interaction using TOUGH2 (open access)

A 3-Dimensional discrete fracture network generator to examine fracture-matrix interaction using TOUGH2

Water fluxes in unsaturated, fractured rock involve the physical processes occurring at fracture-matrix interfaces within fracture networks. Modeling these water fluxes using a discrete fracture network model is a complicated effort. Existing preprocessors for TOUGH2 are not suitable to generate grids for fracture networks with various orientations and inclinations. There are several 3-D discrete-fracture-network simulators for flow and transport, but most of them do not capture fracture-matrix interaction. We have developed a new 3-D discrete-fracture-network mesh generator, FRACMESH, to provide TOUGH2 with information about the fracture network configuration and fracture-matrix interactions. FRACMESH transforms a discrete fracture network into a 3 dimensional uniform mesh, in which fractures are considered as elements with unique rock material properties and connected to surrounding matrix elements. Using FRACMESH, individual fractures may have uniform or random aperture distributions to consider heterogeneity. Fracture element volumes and interfacial areas are calculated from fracture geometry within individual elements. By using FRACMESH and TOUGH2, fractures with various inclinations and orientations, and fracture-matrix interaction, can be incorporated. In this paper, results of flow and transport simulations in a fractured rock block utilizing FRACMESH are presented.
Date: April 9, 2003
Creator: Ito, Kazumasa & Yongkoo, Seol
Object Type: Article
System: The UNT Digital Library
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 18, Ed. 1 Monday, August 8, 1977 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 18, Ed. 1 Monday, August 8, 1977

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: August 8, 1977
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 36, Ed. 1 Monday, December 12, 1977 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 36, Ed. 1 Monday, December 12, 1977

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: December 12, 1977
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 37, Ed. 1 Monday, December 19, 1977 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 37, Ed. 1 Monday, December 19, 1977

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: December 19, 1977
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 8, Ed. 1 Monday, May 29, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 8, Ed. 1 Monday, May 29, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: May 29, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 21, Ed. 1 Monday, August 28, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 21, Ed. 1 Monday, August 28, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: August 28, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 22, Ed. 1 Monday, September 4, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 22, Ed. 1 Monday, September 4, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: September 4, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 31, Ed. 1 Monday, November 6, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 31, Ed. 1 Monday, November 6, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: November 6, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
A 4 GSa/s Instability Feedback Processing System for Intra-Bunch Instabilities (open access)

A 4 GSa/s Instability Feedback Processing System for Intra-Bunch Instabilities

None
Date: November 8, 2013
Creator: Dusatko, J.; Cesaratto, J. M.; Fox, J. D.; Pollock, K.; Rivetta, C. H.; Turgut, O. et al.
Object Type: Article
System: The UNT Digital Library
A 4. pi. tracking TPC magnetic spectrometer for RHIC (open access)

A 4. pi. tracking TPC magnetic spectrometer for RHIC

The primary physics objective of the 4{pi} TPC magnetic spectrometer proposal is to search for the Quark-Gluon Plasma. In previous workshops we have discussed what the possible hadronic signatures of such a state of matter would be. Succinctly, the QGP is a direct prediction of non-perturbative QCD. Therefore the question of the existence of this new state of matter bears directly on the validity of non-perturbative QCD. However, since non-perturbative QCD has never been established, it is apparent that what may await us is a host of new phenomena that will go beyond the standard model.
Date: January 1, 1990
Creator: Danby, G.; Eiseman, S. E.; Etkin, A.; Foley, K. J.; Hackenburg, R. W.; Longacre, R. S. et al.
Object Type: Article
System: The UNT Digital Library
N >= 4 Supergravity Amplitudes from Gauge Theory at One Loop (open access)

N >= 4 Supergravity Amplitudes from Gauge Theory at One Loop

We expose simple and practical relations between the integrated four- and five-point one-loop amplitudes of N {ge} 4 supergravity and the corresponding (super-)Yang-Mills amplitudes. The link between the amplitudes is simply understood using the recently uncovered duality between color and kinematics that leads to a double-copy structure for gravity. These examples provide additional direct confirmations of the duality and double-copy properties at loop level for a sample of different theories.
Date: August 19, 2011
Creator: Bern, Z.; Boucher-Veronneau, C. & Johansson, H.
Object Type: Article
System: The UNT Digital Library
4-wave mixing for phase-matching free nonlinear optics in quantum cascade structures : LDRD 08-0346 final report. (open access)

4-wave mixing for phase-matching free nonlinear optics in quantum cascade structures : LDRD 08-0346 final report.

Optical nonlinearities and quantum coherences have the potential to enable efficient, high-temperature generation of coherent THz radiation. This LDRD proposal involves the exploration of the underlying physics using intersubband transitions in a quantum cascade structure. Success in the device physics aspect will give Sandia the state-of-the-art technology for high-temperature THz quantum cascade lasers. These lasers are useful for imaging and spectroscopy in medicine and national defense. Success may have other far-reaching consequences. Results from the in-depth study of coherences, dephasing and dynamics will eventually impact the fields of quantum computing, optical communication and cryptology, especially if we are successful in demonstrating entangled photons or slow light. An even farther reaching development is if we can show that the QC nanostructure, with its discrete atom-like intersubband resonances, can replace the atom in quantum optics experiments. Having such an 'artificial atom' will greatly improve flexibility and preciseness in experiments, thereby enhancing the discovery of new physics. This is because we will no longer be constrained by what natural can provide. Rather, one will be able to tailor transition energies and optical matrix elements to enhance the physics of interest. This report summarizes a 3-year LDRD program at Sandia National Laboratories exploring optical …
Date: October 1, 2010
Creator: Chow, Weng Wah; Wanke, Michael Clement; Allen, Dan G.; Yang, Zhenshan & Waldmueller, Ines
Object Type: Report
System: The UNT Digital Library
6. 5 Tesla SSC lattice example (open access)

6. 5 Tesla SSC lattice example

This note presents an example SSC collider lattice for 20 TeV proton beams using 6.5 Tesla double bore magnets, six collision points, and anti-symmetric insertions.
Date: January 1, 1984
Creator: Garren, A.A.
Object Type: Article
System: The UNT Digital Library
An 8-GeV Synchrotron-Based Proton Driver (open access)

An 8-GeV Synchrotron-Based Proton Driver

In January 2002, the Fermilab Director initiated a design study for a high average power, modest energy proton facility. Such a facility is a possible candidate for a construction project in the U.S. starting in the middle of this decade. The key technical element is a new machine, dubbed the ''Proton Driver,'' as a replacement of the present Booster. The study of an 8-GeV synchrotron-based proton driver has been completed and published. This paper will give a summary report, including machine layout and performance, optics, beam dynamics issues, technical systems design, civil construction, cost estimate and schedule.
Date: June 4, 2003
Creator: Chou, Weiren
Object Type: Article
System: The UNT Digital Library
9/11 and Terrorist Travel: Staff Report of the National Commission on Terrorist Attacks Upon the United States (open access)

9/11 and Terrorist Travel: Staff Report of the National Commission on Terrorist Attacks Upon the United States

Report of the National Commission on Terrorist Attacks Upon the United States (9-11 Commission) describing research into the events of September 11, 2001. It contains the Commission's findings based on the thousands of documents and hundreds of interviews collected during the course of the investigations.
Date: August 21, 2004
Creator: Eldridge, Thomas R.; Ginsburg, Susan; Hempel, Walter T., II; Kephart, Janice L. & Moore, Kelly
Object Type: Report
System: The UNT Digital Library