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Office of Scientific & Technical Information Technical Reports
14,165
Texas State Publications
460
Texas Attorney General Opinions
203
Texas Register
112
USGS Topographic Map Collection
106
Congressional Research Service Reports
67
Technical Report Archive and Image Library
64
Office of Technology Assessment
63
Federal Communications Commission Record
27
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13
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Texas Register
112
7.5 Minute Series (Topographic)
59
Texas Motor Vehicle Traffic Accident Summaries
55
30 x 60 Minute Series (Topographic)
44
Texas Parks & Wildlife News
42
Argonne National Laboratory Reports
34
FCC Record
27
Texas Disease Prevention News
24
Fiscal Year 1993
23
73rd Legislature of Texas
18
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Wideband pulse reconstruction from sparse spectral-amplitude data. Final report
Methods are investigated for reconstructing a wideband time-domain pulse waveform from a sparse set of samples of its frequency-domain amplitude spectrum. Approaches are outlined which comprise various means of spectrum interpolation followed by phase retrieval. Methods for phase retrieval are reviewed, and it is concluded that useful results can only be obtained by assuming a minimum-phase solution. Two reconstruction algorithms` are proposed. The first is based upon the use of Cauchy`s technique for estimating the amplitude spectrum in the form of a ratio of polynomials. The second uses B-spline interpolation among the sampled values to reconstruct this spectrum. Reconstruction of the time-domain waveform via inverse Fourier transformation follows, based on the assumption of minimum phase. Representative numerical results are given.
Date:
January 1, 1993
Creator:
Casey, K.F. & Baertlein, B.A.
Object Type:
Report
System:
The UNT Digital Library
Wider availability of PARMILA and recent improvements to PARMILA
PARMILA (Phase And Radial Motion in Ion Linear Accelerators) is a drift-tube linac (DTL) ion-beam dynamics code. Over its long life, many versions have developed. The Los Alamos Accelerator Code Group distributes a version, for which a manual is available. Unless otherwise specified, all mentions of PARMILA in this document refer to that LAACG-distributed version. Until recently, this documented and distributed version functioned only under CTSS. Users who wished to run on a different operating system needed to convert the code themselves. PARMILA now operates under UNICOS, a much more widely available CRAY operating system, and under VAX/VMS. This paper describes some new features of the code, and gives directions for obtaining the manual and the UNICOS and VMS versions of the code.
Date:
January 1, 1993
Creator:
Merson, J.L. & Rybarcyk, L.J.
Object Type:
Article
System:
The UNT Digital Library
Wiggler as spin rotators for RHIC
The spin of a polarized particle in a circular accelerator can be rotated with an arrangement of dipoles with field mutually perpendicular and perpendicular to the orbit. To achieve spin rotation, a given field integral value is required. The device must be designed in a way that the particle orbit is distorted as little as possible. It is shown that wigglers with many periods are suitable to achieve spin rotation with minimum orbit distortions. Wigglers are also more compact than more established structures and will use less electric power. Additional advantages include their use for non distructive beam diagnostics. Results are given for the Relativistic Heavy Ion Collider (RHIC) in the polarized proton mode.
Date:
January 1, 1993
Creator:
Luccio, A. & Conte, M.
Object Type:
Article
System:
The UNT Digital Library
Wildflowers of Texas
Map showing the wildflower regions of Texas. The front of the map is a collage of photos of various wildflowers and the back contains a map showing the regions and descriptions of the flower species.
Date:
1993
Creator:
Texas. Department of Transportation.
Object Type:
Map
System:
The Portal to Texas History
Workshop on diamond and diamond-like-carbon films for the transportation industry
Applications exist in advanced transportation systems as well as in manufacturing processes that would benefit from superior tribological properties of diamond, diamond-like-carbon and cubic boron nitride coatings. Their superior hardness make them ideal candidates as protective coatings to reduce adhesive, abrasive and erosive wear in advanced diesel engines, gas turbines and spark-ignited engines and in machining and manufacturing tools as well. The high thermal conductivity of diamond also makes it desirable for thermal management not only in tribological applications but also in high-power electronic devices and possibly large braking systems. A workshop has been recently held at Argonne National Laboratory entitled ``Diamond and Diamond-Like-Carbon Films for Transportation Applications`` which was attended by 85 scientists and engineers including top people involved in the basic technology of these films and also representatives from many US industrial companies. A working group on applications endorsed 18 different applications for these films in the transportation area alone. Separate abstracts have been prepared.
Date:
January 1, 1993
Creator:
Nichols, F.A. & Moores, D.K.
Object Type:
Article
System:
The UNT Digital Library
WPS and Family Businesses
This brochure describes exemptions of agricultural owners and requirements needed under the Worker Protection Standard.
Date:
1993~
Creator:
Texas. Department of Agriculture.
Object Type:
Pamphlet
System:
The Portal to Texas History
X-ray and neutron scattering studies of magnetic critical fluctuations in holmium
We describe measurements of the magnetic critical fluctuations of holmium by x-ray scattering techniques. The x-ray results are compared to those obtained in neutron scattering experiments performed on the same sample.
Date:
January 1, 1993
Creator:
Thurston, T.R.; Helgesen, G.; Gibbs, D.; Shirane, G. (Brookhaven National Lab., Upton, NY (United States)); Hill, J.P. (Brookhaven National Lab., Upton, NY (United States) Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Physics) & Gaulin, B.D. (Brookhaven National Lab., Upton, NY (United States) McMaster Univ., Hamilton, ON (Canada). Dept. of Physics)
Object Type:
Article
System:
The UNT Digital Library
Xylose fermentation to ethanol
The past several years have seen tremendous progress in the understanding of xylose metabolism and in the identification, characterization, and development of strains with improved xylose fermentation characteristics. A survey of the numerous microorganisms capable of directly fermenting xylose to ethanol indicates that wild-type yeast and recombinant bacteria offer the best overall performance in terms of high yield, final ethanol concentration, and volumetric productivity. The best performing bacteria, yeast, and fungi can achieve yields greater than 0.4 g/g and final ethanol concentrations approaching 5%. Productivities remain low for most yeast and particularly for fungi, but volumetric productivities exceeding 1.0 g/L-h have been reported for xylose-fermenting bacteria. In terms of wild-type microorganisms, strains of the yeast Pichia stipitis show the most promise in the short term for direct high-yield fermentation of xylose without byproduct formation. Of the recombinant xylose-fermenting microorganisms developed, recombinant E. coli ATTC 11303 (pLOI297) exhibits the most favorable performance characteristics reported to date.
Date:
January 1, 1993
Creator:
McMillan, J.D.
Object Type:
Report
System:
The UNT Digital Library
Xylose fermentation to ethanol. A review
The past several years have seen tremendous progress in the understanding of xylose metabolism and in the identification, characterization, and development of strains with improved xylose fermentation characteristics. A survey of the numerous microorganisms capable of directly fermenting xylose to ethanol indicates that wild-type yeast and recombinant bacteria offer the best overall performance in terms of high yield, final ethanol concentration, and volumetric productivity. The best performing bacteria, yeast, and fungi can achieve yields greater than 0.4 g/g and final ethanol concentrations approaching 5%. Productivities remain low for most yeast and particularly for fungi, but volumetric productivities exceeding 1.0 g/L-h have been reported for xylose-fermenting bacteria. In terms of wild-type microorganisms, strains of the yeast Pichia stipitis show the most promise in the short term for direct high-yield fermentation of xylose without byproduct formation. Of the recombinant xylose-fermenting microorganisms developed, recombinant E. coli ATTC 11303 (pLOI297) exhibits the most favorable performance characteristics reported to date.
Date:
January 1, 1993
Creator:
McMillan, J. D.
Object Type:
Report
System:
The UNT Digital Library
Zapata
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:100000
Date:
1993
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Zircons and fluids: An experimental investigation with applications for radioactive waste disposal. Stability of zircons: Progress report, January 1992--December 1992
The long-term stability of nuclear waste forms or barriers is related to changes in physical properties of the material induced through radiation damage and subsequent changes in solubility. Investigations conducted on natural zircons (ZrSiO{sub 4}) supports a positive correlation between level of alpha damage and fluid composition to enhanced levels of corrosion. In this report we present preliminary data on the nature and rate of the solution process involving < 600,000 year-old zircons being affected by natural fluids in geyser fields of Yellowstone National Park. We also summarize our continuing activity by including in this report articles that have been published or are in press in refereed journals.
Date:
1993~
Creator:
Sinha, A. K.
Object Type:
Report
System:
The UNT Digital Library
Bureau of WIC Nutrition Biennial Report: 1992-1993
Biennial report of the Bureau of WIC Nutrition describing goals, activities, and accomplishments of the fiscal year 1992 to 1993.
Date:
~1993
Creator:
Texas. Bureau of WIC Nutrition.
Object Type:
Report
System:
The Portal to Texas History