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21,938 Matching Results
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1/2 Sintering of Mullite-Containing Materials: I. Effect of Composition
Sintering behavior of mullite-containing powders was studied over a range of chemical compositions (Al{sub 2}O{sub 3}/SiO{sub 2} ratio). Densification measurements were made for both liquid phase-containing and solid state systems. Small amounts of liquid phase were observed to have a significant effect on densification rate. A linear relationship was obtained between the percent of theoretical density and the logarithm of time for compositions in the range 73-75 wt% Al{sub 2}O{sub 3}. Currently available models for intermediate stage sintering kinetics were considered to be inadequate for these systems. Grain boundary transport 0r diffusion appeared to be the primary mechanism of densification.
Date:
December 1, 1981
Creator:
Sacks, Michael D. & Pask, Joseph A.
Object Type:
Article
System:
The UNT Digital Library
2-D time evolution of T/sub e/ during sawtooth crash based on fast ECE (electron cyclotron emission) measurements on TFTR
Electron cyclotron emission measurements taken at 20 locations in the horizontal midplane during a sawtooth crash have been analysed based on the assumption of fast rigid rotation of the plasma. Due to this fast rotation (approx.100..mu..sec), which remains fairly constant throughout the sawtooth crash, we have been able to make time-to-space reconstructions of half the poloidal plane using points which are separated in time by not more than 40..mu..sec. The existence of a temperature flattening in the precursor phase, which we interpret as an m = 1 temperature island, is clearly demonstrated, and its location and width agree well with local emissivity measurements from soft x-ray tomography viewing the same poloidal plane. The rotating temperature island in the precursor phase, the outward movement of the region of high T/sub c/ during the crash phase, and the shape of T/sub e/ during the crash phase, and the shape of T/sub e/ distribution after the crash during the successor phase have all been documented in a time sequence of color contours. 4 refs., 10 figs.
Date:
December 1, 1988
Creator:
Kuo-Petravic, G.
Object Type:
Report
System:
The UNT Digital Library
2-Dimensional studies of the disk-and-washer and side-coupled resonant cavity structures
The work done consists of three parts: optimizing the disk-and-washer (DAW) structure at ..beta.. = 0.5662 corresponding to E = 200 MeV; comparing the DAW structure with the side-coupled (SCS) structure at various values of beta, ranging from ..beta.. = 0.4569 and E = 116 MeV to ..beta.. = 0.7131 and E = 400 MeV; and re-optimizing the DAW structure at ..beta.. = 0.7131. 4 refs., 51 figs., 41 tabs.
Date:
December 1, 1987
Creator:
Larry, L.D. Jr.
Object Type:
Report
System:
The UNT Digital Library
3-D transient eddy current calculations for the FELIX cylinder experiments
The three-dimensional eddy current transient field problem is formulated first using the U-V method. This method breaks the vector Helmholtz equation into two scalar Helmholtz equations. Null field integral equations and the appropriate boundary conditions are used to set up an identification matrix which is independent of null field point locations. Embedded in the identification matrix are the unknown eigenvalues of the problem representing its impulse response in time. These eigenvalues are found by equating the determinant of the identification matrix to zero. When this initial forcing function is Fourier decomposed into its spatial harmonics, each Fourier component can be associated with a unique eigenvalue by this technique. The true transient solution comes through a convolution of the impulse response so obtained with the particular external field decay governing the problem at hand. The technique is applied to the FELIX cylinder experiments; computed results are compared to data. A pseudoanalytic confirmation of the eigenvalues so obtained is formulated to validate the procedure.
Date:
December 1, 1986
Creator:
Davey, K. R. & Turner, L. R.
Object Type:
Report
System:
The UNT Digital Library
20-kW Solar Photovoltaic Flat-Panel Power System for an Uninterruptible Power-System Load in El Paso, Texas. Phase Ii. System Fabrication. Final Report October 1, 1979-May 31, 1981
The system plans, construction, integration and test, and performance evaluation are discussed for the photovoltaic power supply at the Newman Power Station in El Paso, Texas. The system consists of 64 parallel-connected panels, each panel containing nine series-connected photovoltaic modules. The system is connected, through power monitoring equipment, to an existing DC bus that supplies uninterruptible power to a computer that controls the power generating equipment. The site is described and possible environmental hazards are assessed. Site preparation and the installation of the photovoltaic panels, electrical cabling, and instrumentation subsystems are described. System testing includes initial system checkout, module performance test, control system test. A training program for operators and maintenance personnel is briefly described, including visual aids. Performance data collection and analysis are described, and actual data are compared with a computer simulation. System drawings are included. (LEW)
Date:
December 1, 1981
Creator:
Risser, V.V.
Object Type:
Report
System:
The UNT Digital Library
[100 E. Brazos - Lamar School]
Photograph of the southwest corner of Lamar School, located at 100 E. Brazos in Palestine, Texas. It is a one-story brick building with a tile roof.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[101 E. Oak - Federal Building]
Photograph of the front (south) and west side of the "Federal Building," located at 101 E. Oak in Palestine, Texas. It is a two-story brick building with Renaissance Revival-style details. This view shows the building from the corner of Oak and Sycamore streets.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
120 Degree Phase Advance\ Cell Lattice
None
Date:
December 6, 1983
Creator:
Ruggiero, Alessandro G.
Object Type:
Report
System:
The UNT Digital Library
300 Area Process Trench Sediment Analysis Report
This report describes the results of a sampling program for the sediments underlying the Process Trenches serving the 300 Area on the Hanford reservation. These Process Trenches were the subject of a Closure Plan submitted to the Washington State Department of Ecology and to the US Environmental Protection Agency in lieu of a Part B permit application on November 8, 1985. The closure plan described a proposed sampling plan for the underlying sediments and potential remedial actions to be determined by the sample analyses results. The results and proposed remedial action plan are presented and discussed in this report. 50 refs., 6 figs., 8 tabs.
Date:
December 1, 1987
Creator:
Zimmerman, M.G. & Kossik, C.D.
Object Type:
Report
System:
The UNT Digital Library
[410 Avenue A - First Presbyterian Church]
Photograph of the front and east side of the First Presbyterian Church, located at 410 Avenue A in Palestine, Texas. It is a red-brick building with white stone accents that has a Gothic architecture design including leaded stained glass and Tiffany memorial windows. There is a tall silver spire above the tower on the corner of the building.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[412 S. Royall - Royall House]
Photograph of the front and south side of a two-story house, located at 416 S. Royall in Palestine, Texas. It has a long, wrap-around porch with Ionic columns and brick around the lower level of the house.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[421 S. Magnolia - Alexander White Gregg House]
Photograph of the front and south side of the "Alexander White Gregg House," a two-story house located at 421 S. Magnolia in Palestine, Texas. It has a partially-enclosed front porch and a two-story bay window in the right side of the building. The house has been modified and expanded multiple times, and it was the primary residence of Congressman Alexander White Gregg and his wife during the late 1800s and early 20th century.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[422 S. Magnolia - First United Methodist Church]
Photograph of the front and north side of the First United Methodist Church, located at 422 S. Magnolia in Palestine, Texas. The two-story church is made of brick with stone accents and has Gothic Revival-style architecture, including pointed, arched openings and corner towers; the tower on the southwest corner is taller than the rest of the building. To the left of the building, there is a stone wall with arches that match the building's windows, and a decorative wooden gate.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[519 S. Royall]
Photograph of the front of the "Gooch, Gardner, Kolstad House," a white, two-story, brick house located at 519 S. Royall in Palestine, Texas. It has Victorian Italianate architectural embellishments, including the segmental-arched hoodmolds, bracketed eaves, and main entrance with its round-arched portal and hoodmold. Additionally, there are Queen Anne-style aspects, such as the fish-scaled, patterned shingles in the front-facing gable and the complex roof plan.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[601 S. May - Dilley Foundry Furnace Building]
Photograph of the south and east sides of the Dilley Foundry Furnace Building located on the 600 block of S. May in Palestine, Texas. It is a one-story brick building that housed furnaces for the Dilley foundry; it is surrounded by trees and is overgrown with vegetation.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[601 S. Sycamore - Maier House]
Photograph of the front and north side of the "Maier House," a two-story house with brick veneer, located at 601 S. Sycamore in Palestine, Texas. It has Spanish Colonial Revival-style architectural details.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[619 S. Sycamore - A.R. Howard House]
Close-up photograph of the southwest corner of the "A.R. Howard House," a two-story, Victorian Italianate-style house located at 619 S. Sycamore in Palestine, Texas. This house is noteworthy because of its load-bearing masonry (brick) construction and its segmental-arched openings, bracketed eaves, and low-pitched roof.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
[722 S. Magnolia - Lucas Davey House]
Photograph of the front and south sides of the "Lucas-Davey House," a two-story Queen Anne-style home located at 722 S. Magnolia in Palestine, Texas. Distinctive features include the asymmetrical massing, a richness in details and materials and superb craftsmanship.
Date:
December 1989
Creator:
Hardy, Daniel
Object Type:
Photograph
System:
The Portal to Texas History
850 J, 150 ns narrow-band krypton fluoride laser
We report laser experiments on a 248 nm KrF laser with a 30x40x120 cm gain volume and an injection locked unstable resonator cavity. The volume is pumped by six 450 kV, 90 kA electron beam generators using water pulse forming lines.
Date:
December 16, 1983
Creator:
Goldhar, J.; Jancaitis, K. S.; Murray, J. R. & Schlitt, L. G.
Object Type:
Article
System:
The UNT Digital Library
₁¹H+ - and ₂⁴He+ - induced M-shell x-ray-production cross sections for selected elements in the rare-earth region
Article on ₁¹H+ and ₂⁴He+ -induced M-shell x-ray-production cross sections for selected elements in the rare-earth region.
Date:
December 1983
Creator:
Mehta, R.; Duggan, Jerome L.; Price, J. L.; Kocur, P. M.; McDaniel, Floyd Del. (Floyd Delbert), 1942- & Lapicki, Gregory
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 10, No. 14, Ed. 1 Wednesday, December 10, 1980
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 10, 1980
Creator:
Lee, Glenda
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 11, No. 14, Ed. 1 Wednesday, December 9, 1981
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 9, 1981
Creator:
Fansler, Marianne
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 12, No. 12, Ed. 1 Thursday, December 2, 1982
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 2, 1982
Creator:
Goodwin, Debbie
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 12, No. 13, Ed. 1 Thursday, December 9, 1982
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 9, 1982
Creator:
Goodwin, Debbie
Object Type:
Newspaper
System:
The Gateway to Oklahoma History