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256,528 Matching Results

Start Over Month December

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Results: 1 - 24 of 256,528 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
0. 20-m (8-in.) Primary Burner Development Report (open access)

0. 20-m (8-in.) Primary Burner Development Report

High-Temperature Gas-Cooled Reactors (HTGRs) utilize graphite-base fuels. Fluidized-bed burners are being employed successfully in the experimental reprocessing of these fuels. The primary fluidized-bed burner is a unit operation in the reprocessing flowsheet in which the graphite moderator is removed. A detailed description of the development status of the 0.20-m (8-in.) diameter primary fluidized-bed burner as of July 1, 1977 is presented. Experimental work to date performed in 0.10; 0.20; and 0.40-m (4, 8, and 16 in.) diameter primary burners has demonstrated the feasibility of the primary burning process and, at the same time, has defined more clearly the areas in which additional experimental work is required. The design and recent operating history of the 0.20-m-diameter burner are discussed, with emphasis placed upon the evolution of the current design and operating philosophy.
Date: December 1977
Creator: Stula, R. T.; Young, D. T. & Rode, J. S.
Object Type: Report
System: The UNT Digital Library
0.351 micron Laser Beam propagation in High-temperature Plasmas (open access)

0.351 micron Laser Beam propagation in High-temperature Plasmas

A study of the laser-plasma interaction processes have been performed in plasmas that are created to emulate the plasma conditions in indirect drive inertial confinement fusion targets. The plasma emulator is produced in a gas-filled hohlraum; a blue 351-nm laser beam propagates along the axis of the hohlraum interacting with a high-temperature (T{sub e} = 3.5 keV), dense (n{sub e} = 5 x 10{sup 20}cm{sup -3}), long-scale length (L {approx} 2 mm) plasma. Experiments at these conditions have demonstrated that the interaction beam produces less than 1% total backscatter resulting in transmission greater than 90% for laser intensities less than I < 2 x 10{sup 15} W-cm{sup -2}. The bulk plasma conditions have been independently characterized using Thomson scattering where the peak electron temperatures are shown to scale with the hohlraum heater beam energy in the range from 2 keV to 3.5 keV. This feature has allowed us to determine the thresholds for both backscattering and filamentation instabilities; the former measured with absolutely calibrated full aperture backscatter and near backscatter diagnostics and the latter with a transmitted beam diagnostics. A plasma length scaling is also investigated extending our measurements to 4-mm long high-temperature plasmas. At intensities I < 5 x …
Date: December 10, 2007
Creator: Froula, D.; Divol, L.; Meezan, N.; Ross, J.; Berger, R. L.; Michel, P. et al.
Object Type: Report
System: The UNT Digital Library
1.1" Ammunition Clipping Room on Superstructure Dk.

1.1" Ammunition Clipping Room on Superstructure Dk.

Blueprint depicting technical details of Battleship Texas.
Date: December 20, 1940
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1.1" Gun Director Foundation Superstructure Dk. P/S

1.1" Gun Director Foundation Superstructure Dk. P/S

Blueprint depicting technical details of Battleship Texas.
Date: December 16, 1940
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1/2 Sintering of Mullite-Containing Materials: I. Effect of Composition (open access)

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
1.5" heavy pressure valve cast steel

1.5" heavy pressure valve cast steel

Blueprint depicting technical details of Battleship Texas.
Date: December 8, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
[The 1,000th Ph.D. Recipient, #1]

[The 1,000th Ph.D. Recipient, #1]

Photograph of the 1,000th person to graduate from North Texas State University with a Ph.D. degree; he is wearing a dark colored robe and holding a paper on top of his mortarboard. An unidentified professor next to him (right) is pointing to something on the paper. They are standing in front of wood-paneled walls with a floor-to-ceiling curtain as well as a statue in the right side of the image and artwork partially visible on the left.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #2]

[The 1,000th Ph.D. Recipient, #2]

Photograph of the 1,000th student to graduate from North Texas State University with a Ph.D. degree. He is wearing dark-colored robes and a mortarboard, standing in the corner of a wood-paneled room. An unidentified faculty member is standing in front of him and shaking his hand.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #3]

[The 1,000th Ph.D. Recipient, #3]

Photograph of a student wearing commencement robes and a mortarboard, shaking hands with an unidentified faculty member (left). The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room and several framed certificates and plaques are on the wall in the right side of the image.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #4]

[The 1,000th Ph.D. Recipient, #4]

Photograph an unidentified faculty member shaking hands with the 1,000th person to graduate from North Texas State University with a Ph.D. degree. The student is wearing dark-colored robes with a mortarboard. They are standing in the corner of a wood-paneled room with floor-to-ceiling curtains to the left.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #5]

[The 1,000th Ph.D. Recipient, #5]

Photograph of an unidentified faculty member with the 1,000th recipient of a North Texas State University Ph.D. degree; they are shaking hands, but turned so that both of them can look at the camera. The student is wearing dark-colored graduation robes and a mortarboard. They are standing in the corner of a wood-paneled room.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #6]

[The 1,000th Ph.D. Recipient, #6]

Photograph of the 1,000th graduate to receive a Ph.D. from North Texas State University, shaking hands with an unidentified professor, turned so that they can both face the camera. The student is wearing dark-colored graduation robes and a mortarboard; the tassel is partially obscuring his face. They are standing in the corner of a wood-paneled room.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #7]

[The 1,000th Ph.D. Recipient, #7]

Photograph of a student wearing graduation robes and a mortarboard, standing between two unidentified faculty members, who are facing him. The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room, in front of a statue on a pedestal that is partially visible in the center of the image.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #8]

[The 1,000th Ph.D. Recipient, #8]

Photograph of the 1,000th student to graduate from North Texas State University with a Ph.D. degree. He is wearing dark-colored robes and a mortarboard, standing in the corner of a wood-paneled room. An unidentified faculty member is standing in front of him and is excitedly waving his hands up.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #9]

[The 1,000th Ph.D. Recipient, #9]

Photograph of a student wearing graduation robes and a mortarboard, standing between two unidentified faculty members, shaking hands with the man to his left. The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
[The 1,000th Ph.D. Recipient, #10]

[The 1,000th Ph.D. Recipient, #10]

Photograph of a student wearing graduation robes and a mortarboard, standing between two unidentified faculty members, shaking hands with the man to his left. The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room.
Date: December 22, 1975
Creator: unknown
Object Type: Photograph
System: The UNT Digital Library
E-1 (12-8-17)

E-1 (12-8-17)

Photograph of Newcastle FD Engine 1.
Date: December 8, 2017
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History
1.25" heavy pressure valve cast steel

1.25" heavy pressure valve cast steel

Blueprint depicting technical details of Battleship Texas.
Date: December 12, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
E-1 common analog model. Revision 6.1 (RN-S-0469) (open access)

E-1 common analog model. Revision 6.1 (RN-S-0469)

None
Date: December 29, 1970
Creator: unknown
Object Type: Report
System: The UNT Digital Library
1-D Van der Waals Foams Heated by Ion Beam Energy Deposition (open access)

1-D Van der Waals Foams Heated by Ion Beam Energy Deposition

One dimensional simulations of various initial average density aluminum foams (modeled as slabs of solid metal separated by low density regions) heated by volumetric energy deposition are conducted with a Lagrangian hydrodynamics code using a van der Waals equation of tate (EOS). The resulting behavior is studied to facilitate the design of future warm dense matter (WDM) experiments at LBNL. In the simulations the energy deposition ranges from 10 to 30 kJ/g and from 0.075 to 4.0 ns total pulse length, resulting in temperatures from approximately 1 o 4 eV. We study peak pressures and temperatures in the foams, expansion velocity, and the phase evolution. Five relevant time scales in the problem are identified. Additionally, we present a method for characterizing the level of inhomogeneity in a foam target as it is heated and the time it takes for a foam to homogenize.
Date: December 23, 2009
Creator: Zylstra, A. B.; Barnard, J. J. & More, R. M.
Object Type: Article
System: The UNT Digital Library
1" heavy pressure valve cast steel

1" heavy pressure valve cast steel

Blueprint depicting technical details of Battleship Texas.
Date: December 12, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1 MeV electron irradiation of solid Xe nanoclusters in Al : an in-situ HRTEM study. (open access)

1 MeV electron irradiation of solid Xe nanoclusters in Al : an in-situ HRTEM study.

Thin film samples of a simple embedded nanocluster system consisting of solid Xe precipitates in Al have been subjected to 1 MeV electron irradiation in a high-voltage electron microscope. High-resolution images have been recorded on videotape in order to monitor the changes to the system resulting from the passage of electrons through the film. Inspection of the video recordings (in some cases frame-by-frame) reveals that complex, rapid processes occur under the electron beam. These include, movement of small clusters, coalescence of neighboring clusters, shape changes, the apparent melting and resolidification of the Xe, and the creation and annealing of extended defects within the Xe lattice. A tentative interpretation of some of the observations is presented in terms of the electron-induced displacement processes at the surface of the clusters.
Date: December 5, 1997
Creator: Donnelly, S. E.; Furuya, K.; Song, M.; Birtcher, R. C. & Allen, C. W.
Object Type: Article
System: The UNT Digital Library
E-1 pump test at Norman {12-4-19}

E-1 pump test at Norman {12-4-19}

Photograph of Moore E-1 during a pump test. Photo taken at Norman station 7 on Max Westheimer Airport.
Date: December 4, 2019
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History
(02.2) Scoping experiments; (02.3) long-term corrosion testing and properties evaluation of candidate waste package basket material (open access)

(02.2) Scoping experiments; (02.3) long-term corrosion testing and properties evaluation of candidate waste package basket material

The work described in this activity plan addresses Information Need 2.7.3 of the Yucca Mountain Site Characterization Plan (l), which reads Determination that the design criteria in lOCFR60.130 through 60.133 and any appropriate additional design objectives pertaining to criticality control have been met. This work falls under section WBS 1.2.2.5 2 (Basket Materials) of WBS 1.2.2.5 (Waste Package Materials) in the Work Breakdown Structure of the Yucca Mountain Site Characterization Project.
Date: December 20, 1996
Creator: VanKonynenburg, R. A.
Object Type: Report
System: The UNT Digital Library