UNT Libraries Government Documents Department - 6,253 Matching Results

Search Results

Results: 1 - 24 next
open access

1,3-Propanediol Made From Fermentation-Derived Malonic Acid: Office of Industrial Technologies (OIT) Agriculture Project Fact Sheet

Description: 1,3-Propanediol is one of two ingredients used in producing polytrimethylene terephthalate (PTT), a polymer which can be used in polyester and nylon applications. Researchers are developing a process to ferment biomass feedstock to malonic acid using filamentous fungi and then catalytically convert malonic acid to 1,3-propanediol.
Date: September 12, 2001
Creator: Carde, T.
Item Type: Refine your search to only Book
open access

2 Questions pertaining to DON-0133 and the non-BRAC Scenario (Portsmouth Naval Shipyard)

Description: 2 Questions pertaining to DON-0133 and the non-BRAC Senario (Portsmouth Naval Shipyard. Department of Defense Clearinghouse Response: DoD Clearinghouse reply to a letter from the BRAC Commission regarding 2 Questions pertaining to DON-0133 and the non-BRAC scenario (Portsmouth Naval Shipyard)
Date: August 12, 2005
Creator: United States. Department of Defense.
Item Type: Refine your search to only Text
open access

A 3-D adaptive mesh refinement algorithm for multimaterial gas dynamics

Description: Adaptive Mesh Refinement (AMR) in conjunction with high order upwind finite difference methods has been used effectively on a variety of problems. In this paper we discuss an implementation of an AMR finite difference method that solves the equations of gas dynamics with two material species in three dimensions. An equation for the evolution of volume fractions augments the gas dynamics system. The material interface is preserved and tracked from the volume fractions using a piecewise linear re… more
Date: August 12, 1991
Creator: Puckett, E. G. & Saltzman, J. S.
Item Type: Refine your search to only Article
open access

3-D full waveform inversion of seismic data; Part I. Theory

Description: Full waveform inversion of seismic data is a challenging subject partly because of the lack of precise knowledge of the source. Since currently available approaches involve some form of approximations to the source, inversion results are subject to the quality and the choice of the source information used. A new full waveform inversion scheme has been introduced (Lee and Kim, 2003) using normalized wavefield for simple two-dimensional (2-D) scalar problems. The method does not require source in… more
Date: May 12, 2003
Creator: Lee, Ki Ha
Item Type: Refine your search to only Article
open access

3-D surface profile measurements of large x-ray synchrotron radiation mirrors using stitching interferometry.

Description: Stitching interferometry, using small-aperture, high-resolution, phase-measuring interferometry, has been proposed for quite some time now as a metrology technique to obtain 3-dimensional profiles of surfaces of oversized optical components and substrates. The aim of this work is to apply this method to the specific case of long grazing-incidence x-ray mirrors, such as those used in beamlines at synchrotron radiation facilities around the world. Both fabrication and characterization of these mi… more
Date: September 12, 2002
Creator: Assoufid, L.; Bray, M.; Qian, J. & Shu, D.
Item Type: Refine your search to only Article
open access

The "8(a) Program" for Small Businesses Owned and Controlled by the Socially and Economically Disadvantaged: Legal Requirements and Issues

Description: This report provides a brief history of the 8(a) Program, summarizes key requirements, and discusses legal challenges alleging that the program's presumption that members of certain racial and ethnic groups are socially disadvantaged violates the constitutional guarantee of equal protection.
Date: October 12, 2012
Creator: Manuel, Kate M. & Luckey, John R.
Item Type: Refine your search to only Report
open access

A 10-Hz Terawatt Class Ti:Sapphire Laser System: Development and Applications

Description: We developed a two stage Ti:Sapphire laser system to generate 16 mJ/80fs laser pulses at the pulse repetition rate of 10 Hz. The key deriver for the present design is implementing a highly efficient symmetric confocal pre-amplifier and employing a simple, inexpensive synchronization scheme relying only on a commercial digital delay-generator. We characterized the amplified pulses in spatial-, spectral-, and temporal-domains. The laser system was used to investigate various nonlinear optical pro… more
Date: January 12, 2010
Creator: Sharma, A. K.; Smedley, J.; Tsang, T. & Rao, T.
Item Type: Refine your search to only Article
open access

A 90-GHz Photoinjector

Description: Photocathode rf guns depend on mode locked laser systems to produce an electron beam at a given phase of the rf. In general, the laser pulse is less than {sigma}{sub z} = 10{sup o} of rf phase in length and the required stability is on the order of {Delta}{phi} = 1{sup o}. At 90 GHz (W-band), these requirements correspond to {sigma}{sub z} = 333 fsec and {Delta}{phi} = 33 fsec. Laser system with pulse lengths in the fsec regime are commercially available, the timing stability is a major concern… more
Date: September 12, 2005
Creator: Palmer, D. T.; Hogan, M. J.; Ferrario, M. & Serafini, L.
Item Type: Refine your search to only Article
open access

100 Areas Technical Activities Report - Physics, January 1947

Description: Four routine shutdowns were experienced during the month. A measurable amount of the excess reactivity held in the control rods at the first of the month has been lost in the decrease in the average accumulated exposure of all the metal in the pile. The vertical safety rod guides have been measured for vertical alignment by the Maintenance Dept. A definite pattern has been found in the misalignment of the guides. The horizontal rod thimbles were borrowed on January 2, 1947 to see if any leaks w… more
Date: February 12, 1947
Creator: Montgomery, E. B.
Item Type: Refine your search to only Report
open access

100-D Area In Situ Redox Treatability Test for Chromate-Contaminated Groundwater

Description: A treatability test was conducted for the In Situ Redox Manipulation (ISRM) technology at the 100 D Area of the U. S. Department of Energy's Hanford Site. The target contaminant was dissolved chromate in groundwater. The ISRM technology creates a permeable subsurface treatment zone to reduce mobile chromate in groundwater to an insoluble form. The ISRM permeable treatment zone is created by reducing ferric iron to ferrous iron within the aquifer sediments, which is accomplished by injecting aqu… more
Date: October 12, 2000
Creator: Williams, Mark D.; Vermeul, Vincent R.; Szecsody, James E. & Fruchter, Jonathan S.
Item Type: Refine your search to only Report
open access

105-DR Large Sodium Fire Facility decontamination, sampling, and analysis plan

Description: This is the decontamination, sampling, and analysis plan for the closure activities at the 105-DR Large Sodium Fire Facility at Hanford Reservation. This document supports the 105-DR Large Sodium Fire Facility Closure Plan, DOE-RL-90-25. The 105-DR LSFF, which operated from about 1972 to 1986, was a research laboratory that occupied the former ventilation supply room on the southwest side of the 105-DR Reactor facility in the 100-D Area of the Hanford Site. The LSFF was established to investiga… more
Date: June 12, 1995
Creator: Knaus, Z.C.
Item Type: Refine your search to only Report
open access

200 Area processing rates

Description: Two types of ``feedstock,`` i.e. irradiated uranium and uranium from underground storage, are processed by the 200 Areas. Future operations may add irradiated thorium as a supplementary feed material. In either case, the major portion of future feedstocks is presumed to be in the form of irradiated metal, i.e. uranium and/or thorium, resulting in an almost complete dependence of the required 200 Area processing rate on reactor power levels and metal irradiation history. This document presents c… more
Date: April 12, 1955
Creator: Platt, A. M.
Item Type: Refine your search to only Report
open access

200 Area treated effluent disposal facility operational test specification

Description: This document identifies the test specification and test requirements for the 200 Area Treated Effluent Disposal Facility (200 Area TEDF) operational testing activities. These operational testing activities, when completed, demonstrate the functional, operational and design requirements of the 200 Area TEDF have been met.
Date: January 12, 1995
Creator: Crane, A. F.
Item Type: Refine your search to only Report
open access

200 West Area Dust Mitigation Strategies

Description: Various strategies were developed for the purpose of mitigating respirable dust experienced at facilities in the southwest corner of the 200 West Area. These strategies focused on treatment of that portion of the dust source located within the 200 West Expansion Area. Strategies included direct shielding of the facilities via establishment of a poplar windbreak and installation of an artificial windscreen; soil stabilization via seeding of herbaceous plants, soil fixatives, straw crimping, stra… more
Date: April 12, 2001
Creator: Sackschewsky, Michael R. & Becker, James M.
Item Type: Refine your search to only Report
open access

218 E-8 Borrow Pit Demolition Site clean closure soil evaluation report

Description: This report summarizes the sampling activities undertaken and the analytical results obtained in a soil sampling and analyses study performed for the 218 E-8 Borrow Pit Demolition Site (218 E-8 Demolition Site). The 218 E-8 Demolition Site is identified as a Resource Conservation and Recovery Act (RCRA) treatment unit that will be closed in accordance with the applicable laws and regulations. The site was used for the thermal treatment of discarded explosive chemical products. No constituents o… more
Date: June 12, 1995
Creator: Korematsu-Olund, D. M.
Item Type: Refine your search to only Report
open access

The 239 Pu(n,2n)238Pu cross section: preliminary calculations

Description: The primary motivation for the present work is to provide theoretical values for the ratio of the partial <sup>239</sup>Pu(n,2nx{gamma})<sup>238</sup>Pu to total <sup>239</sup> Pu(n,2n)<sup>238</sup>Pu cross section for several discrete gamma transitions. Results and conclusions of preliminary calculations from threshold to 20 MeV are presented. Calculations are based on theoretical models with parameters obtained from the literature or from our ad hoc systematics. Optical model cross sections … more
Date: March 12, 1999
Creator: Chen, H.; Reffo, G.; Ross, M. A. & White, R. M.
Item Type: Refine your search to only Report
open access

242-A campaign 95-1 post run document

Description: The 242-A Evaporator Campaign 95-1 was started on June 6, 1995 and finished July 27, 1995. An overall Waste Volume Reduction (WVR) of 8.18 million liters (2.16 mGAL OR 87.6% WVRF) was achieved from 9.35 million liters (2.47 Mgal) of processable waste contained in 108-AP, 107-AP, 106-AW and 102-AW. Slurry generated from Campaign 95-1 consisted of 1.05 million liters (278,000 gal) of dilute double-shell slurry feed (DDSSF) with a SpG of approximately 1.34. Total process condensate discharged to L… more
Date: February 12, 1996
Creator: Guthrie, M.D.
Item Type: Refine your search to only Report
Back to Top of Screen