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Anisotropic Damage Analysis of HY100 Steel Under Quasistatic Loading Conditions
The effect of MnS inclusion orientation on damage evolution and fracture toughness in HYlOO steel is investigated in the context of anisotropic damage modeling at the continuum level. Experimental notched-bar data sets are analyzed and modeled using finite element calculations with constitutive behavior that assumes isotropic elastoplastic behavior in conjunction with anisotropic damage.
Date:
January 1, 2001
Creator:
Laboratory, Los Alamos National
Object Type:
Article
System:
The UNT Digital Library
Annex G:transformation of images, extensions
This Recommendation/International Standard uses a transformation of tile components. In this Annex and all of its sub clauses, the flow charts and tables are normative only in the sense that they are defining an output that alternative implementations shall duplicate.
Date:
January 1, 2001
Creator:
Brislawn, C. M. (Christopher M.)
Object Type:
Article
System:
The UNT Digital Library
[Announcements from Donors]
Photograph of donors announcing gifts at the Luis Jiménez exhibit. Joe Long, Manuel Zuniga, Nilda de la Llata, and Scot Mitte each gave $100,000. They stand behind a podium and wear name tags.
Date:
2001
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
[Anthony DeLeon Backyard, 2001]
Photograph of Anthony DeLeon standing between large bushes in a backyard. There is a folding chair at his left and a white, paneled house stands behind him. He wears a striped t-shirt and jeans, holding a bandana between his two hands. [2001, Dallas, TX]
Date:
2001
Creator:
Doherty, Richard
Object Type:
Photograph
System:
The UNT Digital Library
Application for the Risk-Based Storage of PCB Reme
This Report discusses PCB hazards present at the Idaho National Engineering and Environmental Laboratory.
Date:
January 1, 2001
Creator:
Becker, William Joseph
Object Type:
Report
System:
The UNT Digital Library
Application of foil bearings to helium turbo compressor
Hydrodynamic gas-lubricated foil bearings are ideal for machinery that operates at high speed or in extreme-temperature environments. As motors and generators run at higher speeds with more torque capacity, the need for commonly available, robust, high-speed, low-loss foil bearings is clear. This paper presents an application example of the successful replacement of a tape-type bearing for a bump-type bearing in a helium turbocompressor. Both bearing types are described, as are the steps involved in design and fabrication of the bump bearing, and results of comparison tests between the original and replacement bearings. Methods to analyze bump-type foil bearings with commercially available software are reviewed to further emphasize the inherent simplicity of these bearings. By providing the engineering community with the understanding needed to successfully apply foil bearings, the authors hope that the benefits and true potential of this technology will finally be realized.
Date:
January 1, 2001
Creator:
Chen, H.Ming; Howarth, R.; Bernard, Geren; Theilacker, Jay C. & Soyars, William M.
Object Type:
Article
System:
The UNT Digital Library
Applications of abundance data and requirements for cosmochemical modeling
Understanding the evolution of the universe from Big Bang to its present state requires an understanding of the evolution of the abundances of the elements and isotopes in galaxies, stars, the interstellar medium, the Sun and the heliosphere, planets and meteorites. Processes that change the state of the universe include Big Bang nucleosynthesis, star formation and stellar nucleosynthesis, galactic chemical evolution, propagation of cosmic rays, spallation, ionization and particle transport of interstellar material, formation of the solar system, solar wind emission and its fractionation (FIP/FIT effect), mixing processes in stellar interiors, condensation of material and subsequent geochemical fractionation. Here, we attempt to compile some major issues in cosmochemistry that can be addressed with a better knowledge of the respective element or isotope abundances. Present and future missions such as Genesis, Stardust, Interstellar Pathfinder, and Interstellar Probe, improvements of remote sensing instrumentation and experiments on extraterrestrial material such as meteorites, presolar grains, and lunar or returned planetary or cometary samples will result in an improved database of elemental and isotopic abundances. This includes the primordial abundances of D, 3He, 4He, and 7Li, abundances of the heavier elements in stars and galaxies, the composition of the interstellar medium, solar wind and comets …
Date:
January 1, 2001
Creator:
Busemann, H.; Binns, W. R.; Chiappini, C.; Gloeckler, G.; Hoppe, P.; Kirilova, Donka et al.
Object Type:
Article
System:
The UNT Digital Library
Applying the LANL Statistical Pattern Recognition Paradigm for Structural Health Monitoring to Data from a Surface-Effect Fast Patrol Boat
This report summarizes the analysis of fiber-optic strain gauge data obtained from a surface-effect fast patrol boat being studied by the staff at the Norwegian Defense Research Establishment (NDRE) in Norway and the Naval Research Laboratory (NRL) in Washington D.C. Data from two different structural conditions were provided to the staff at Los Alamos National Laboratory. The problem was then approached from a statistical pattern recognition paradigm. This paradigm can be described as a four-part process: (1) operational evaluation, (2) data acquisition & cleansing, (3) feature extraction and data reduction, and (4) statistical model development for feature discrimination. Given that the first two portions of this paradigm were mostly completed by the NDRE and NRL staff, this study focused on data normalization, feature extraction, and statistical modeling for feature discrimination. The feature extraction process began by looking at relatively simple statistics of the signals and progressed to using the residual errors from auto-regressive (AR) models fit to the measured data as the damage-sensitive features. Data normalization proved to be the most challenging portion of this investigation. A novel approach to data normalization, where the residual errors in the AR model are considered to be an unmeasured input and an auto-regressive …
Date:
January 1, 2001
Creator:
Sohn, Hoon; Farrar, Charles; Hunter, Norman & Worden, Keith
Object Type:
Report
System:
The UNT Digital Library
APPROACHING CRYOGENIC GE PERFORMANCE WITH PELTIER COOLED CDTE
A new class of hand-held, portable spectrometers based on large area (lcm2) CdTe detectors of thickness up to 3mm has been demonstrated to produce energy resolution of between 0.3 and 0.5% FWHM at 662 keV. The system uses a charge loss correction circuit for improved efficiency, and detector temperature stabilization to ensure consistent operation of the detector during field measurements over a wide range of ambient temperature. The system can operate continuously for up to 8hrs on rechargeable batteries. The signal output from the charge loss corrector is compatible with most analog and digital spectroscopy amplifiers and multi channel analyzers. Using a detector measuring 11.2 by 9.1 by 2.13 mm3, we have recently been able to obtain the first wide-range plutonium gamma-ray isotopic analysis with other than a cryogenically cooled germanium spectrometer. The CdTe spectrometer is capable of measuring small plutonium reference samples in about one hour, covering the range from low to high burnup. The isotopic analysis software used to obtain these results was FRAM, Version 4 from LANL. The new spectrometer is expected to be useful for low-grade assay, as well as for some in-situ plutonium gamma-ray isotopics in lieu of cryogenically cooled Ge.
Date:
January 1, 2001
Creator:
Khusainov, A. K. (A. Kh.); Iwanczyk, J. S. (Jan S.); Patt, B. E. (Bradley E.); Prirogov, A. M. (Alexandre M.) & Vo, Duc T.
Object Type:
Article
System:
The UNT Digital Library
AQ 01-5
This painting is mostly black with some vertical white scrapes.
Date:
2001
Creator:
Falsetta, Vincent
Object Type:
Artwork
System:
The UNT Digital Library
O ar do texto opera a forma do som interior
Access:
Use of this item is restricted to the UNT Community
Recording of Miguel Azguime's O ar do texto opera a forma do som interior. The composer describes this as a sound poetry stage work for a speaker/actor. This piece is made of 4 sections that follow each other without interruption and have the following subtitles: "Ar do Texto" (the Air in the Text), "Formant-Melodies", "Sem Recurso" (Without Resources), and "O Som Interior" (the Inner Sound). Although there are some spoken words in Portuguese, most of the text is meaningless and was written as sound compositions.
Date:
2001/2002
Creator:
Azguime, Miguel
Object Type:
Sound
System:
The UNT Digital Library
[Arcadius Steinle House Photograph #1]
Photograph of the Arcadius Steinle House, in Castroville, Texas.
Date:
2001
Creator:
Pfeiffer, Maria
Object Type:
Photograph
System:
The Portal to Texas History
Arco
Access:
Use of this item is restricted to the UNT Community
Recording of Robert Wright's Arco. This is a work for cello and tape and is based on the saltando technique of bouncing the bow upon the strings. The tape part of the work was constructed from recordings of both a real cello and a software physical model of bow/string interactions.
Date:
2001
Creator:
Wright, Robert, 1970-
Object Type:
Sound
System:
The UNT Digital Library
Arrok
Access:
Use of this item is restricted to the UNT Community
Recording of Edgardo Hugo Martinez's Arrok. The composer notes the title as being "the primitive sea", the first element of nature in the creation of the cosmic worldview of the Tehuelches, an indigenous community from the south of Argentina.
Date:
2001
Creator:
Martinez, Edgardo Hugo
Object Type:
Sound
System:
The UNT Digital Library
Art Deco and Streamlined Modern Design, 1920-1950 [Exhibition Photographs]
Photographs of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art. Photographs documenting this exhibition include sixteen gallery installation views.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Collection
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-01]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-02]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-03]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-04]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-05]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-06]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-07]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-08]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History
Art Deco and Streamlined Modern Design, 1920-1950 [Photograph DMA_1621-09]
Photograph of the exhibition "Art Deco and Streamlined Modern Design, 1920-1950," November 18-2001-May 20, 2002, held at the Dallas Museum of Art.
Date:
2001
Creator:
Dallas Museum of Art
Object Type:
Photograph
System:
The Portal to Texas History