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Design of the Prototype Low Energy Beam Transport Line for theSpallation Neutron Source
None
Date:
January 2, 1999
Creator:
Cheng, D. W.; Gough, R. A.; Hoff, M. D.; Keller, R.; Leitner, M. A.; Leung, K. N. et al.
Object Type:
Article
System:
The UNT Digital Library
The Gilmer Mirror (Gilmer, Tex.), Vol. 122, No. 1, Ed. 1 Saturday, January 2, 1999
Semiweekly newspaper from Gilmer, Texas that includes local, state, and national news along with advertising.
Date:
January 2, 1999
Creator:
Overton, Mac
Object Type:
Newspaper
System:
The Portal to Texas History
In situ microbial volatilization of selenium in soils: A case history
A pilot-scale field experiment has been conducted since 1990 to test the effectiveness of microbial volatilization in removing selenium (Se) from soils contaminated with agricultural drainage water. The experiment, in which only irrigation and aeration were employed to enhance microbial processes, was designed to measure all major Se fluxes, including not only selenium loss via volatilization, but also advection with infiltrating rainwater, evapotranspirative transport, and plant uptake. The goal was to account for the total Se mass balance and address questions as to the significance of microbial volatilization relative to other fluxes. Although data collected from 1990 to 1994 showed decreases of Se concentrations in the top soil, subsequent data demonstrated that advective Se fluxes due to rainwater infiltration and evapotranspiration are largely responsible for the observed changes. Se volatilization was measured to account for an annual loss of only about 1%, with volatilization rates decreasing significantly with time, presumably due to the depletion of soil organic carbon. The integrated results of this project demonstrate the advantages and even necessity of an inter-disciplinary and multi-phase approach to evaluating the effectiveness of bioremediation strategies. Extreme caution needs to be taken in interpreting early results; long-term data collection and follow-up are indispensable.
Date:
January 2, 1999
Creator:
Zawislanski, Peter T.; Benson, Sally M.; Jayaweera, Gamani R.; Wu, L. & Frankenberger, William T.
Object Type:
Article
System:
The UNT Digital Library
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 89, No. 1, Ed. 1 Saturday, January 2, 1999
Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 2, 1999
Creator:
Gann, Sherry
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the exterior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the exterior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the interior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the exterior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the interior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the interior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the exterior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the exterior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the exterior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of a statue in front of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Woolaroc Museum and Wildlife Preserve
Photograph of the interior of the Woolaroc Museum and Wildlife Preserve.
Date:
January 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 99, No. 277, Ed. 1 Tuesday, February 2, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 1999
Creator:
Cole, Carol
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
B Plant Complex preclosure work plan
This preclosure work plan describes the condition of the dangerous waste treatment storage, and/or disposal (TSD) unit after completion of the B Plant Complex decommissioning Transition Phase preclosure activities. This description includes waste characteristics, waste types, locations, and associated hazards. The goal to be met by the Transition Phase preclosure activities is to place the TSD unit into a safe and environmentally secure condition for the long-term Surveillance and Maintenance (S&M) Phase of the facility decommissioning process. This preclosure work plan has been prepared in accordance with Section 8.0 of the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) (Ecology et al. 1996). The preclosure work plan is one of three critical Transition Phase documents, the other two being: B Plant End Points Document (WHC-SD-WM-TPP-054) and B Plant S&M plan. These documents are prepared by the U.S. Department of Energy, Richland Operations Office (DOE-RL) and its contractors with the involvement of Washington State Department of Ecology (Ecology). The tanks and vessels addressed by this preclosure work plan are limited to those tanks end vessels included on the B Plant Complex Part A, Form 3, Permit Application (DOE/RL-88-21). The criteria for determining which tanks or vessels are in the Part …
Date:
February 2, 1999
Creator:
ADLER, J.G.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 81, Ed. 1 Tuesday, February 2, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 1999
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 94, No. 10, Ed. 1 Tuesday, February 2, 1999
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 1999
Creator:
Chionsini, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
Chemical Dynamics at the Advanced Light Source
A day-long retreat was held January 15, 1999 to chart the future directions for chemical dynamics studies at the Advanced Light Source. This represents an important period for the Chemical Dynamics Beamline, as the hardware is well-developed, most of the initial experimental objectives have been realized and the mission is now to identify the future scientific priorities for the beamline and attract users of the highest caliber. To this end, we have developed a detailed scientific program for the near term; identified and prioritized the long range scientific opportunities, identified essential new hardware, and outlined an aggressive outreach program to involve the chemical physics community.
Date:
February 2, 1999
Creator:
Baer, T.; Berrah, N.; Fadley, C.; Moore, C. B.; Neumark, D. M.; Ng, C. Y. et al.
Object Type:
Report
System:
The UNT Digital Library
Determination of the effective delayed neutron fraction using MCNP4B
The capability to calculate effective delayed neutron fractions has now been implemented into MCNP4B and is in the testing phase. This option should prove to be most useful for multiplying systems which are not easily modeled using deterministic codes.
Date:
February 2, 1999
Creator:
Werner, C. J. & Little, R. C.
Object Type:
Article
System:
The UNT Digital Library
Discrete approximations of detonation flows with structured detonation reaction zones by discontinuous front models: A program burn algorithm based on detonation shock dynamics
In the design of explosive systems the generic problem that one must consider is the propagation of a well-developed detonation wave sweeping through an explosive charge with a complex shape. At a given instant of time the lead detonation shock is a surface that occupies a region of the explosive and has a dimension that is characteristic of the explosive device, typically on the scale of meters. The detonation shock is powered by a detonation reaction zone, sitting immediately behind the shock, which is on the scale of 1 millimeter or less. Thus, the ratio of the reaction zone thickness to the device dimension is of the order of 1/1,000 or less. This scale disparity can lead to great difficulties in computing three-dimensional detonation dynamics. An attack on the dilemma for the computation of detonation systems has lead to the invention of sub-scale models for a propagating detonation front that they refer to herein as program burn models. The program burn model seeks not to resolve the fine scale of the reaction zone in the sense of a DNS simulation. The goal of a program burn simulation is to resolve the hydrodynamics in the inert product gases on a grid …
Date:
February 2, 1999
Creator:
Bdzil, John B.; Jackson, Thomas L. & Stewart, D. Scott
Object Type:
Report
System:
The UNT Digital Library
The Effect of Humidity on the Reliability of a Surface Micromachined Microengine
Humidity is shown to be a strong factor in the wear of rubbing surfaces in polysilicon micromachines. We demonstrate that very low humidity can lead to very high wear without a significant change in reliability. We show that the volume of wear debris generated is a function of the humidity in an air environment. As the humidity decreases, the wear debris generated increases. For the higher humidity levels, the formation of surface hydroxides may act as a lubricant. The dominant failure mechanism has been identified as wear. The wear debris has been identified as amorphous oxidized silicon. Large slivers (approximately 1 micron in length) of debris observed at the low humidity level were also amorphous oxidized silicon. Using transmission electron microscopy, we observed that the wear debris forms spherical and rod-like shapes. We compared two surface treatment processes: a fluorinated si- lane chain, (FITl) and supercritical C02 dried (SCC02). The microengines using the SCC02 process were found to be less reliable than those released with the FIX process under two humidity levels.
Date:
February 2, 1999
Creator:
Dugger, M. T.; Eaton, W. P.; Irwin, L. W.; Miller, S. L.; Miller, W. M.; Smith, N. F. et al.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, February 2, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 2, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History