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Flow Tones in a Pipeline-Cavity System: Effect of Pipe Asymmetry

Description: Flow tones in a pipeline-cavity system are characterized in terms of unsteady pressure within the cavity and along the pipe. The reference case corresponds to equal lengths of pipe connected to the inlet and outlet ends of the cavity. Varying degrees of asymmetry of this pipe arrangement are investigated. The asymmetry is achieved by an extension of variable length, which is added to the pipe at the cavity outlet. An extension length as small as a few percent of the acoustic wavelength of the r… more
Date: February 28, 2001
Creator: Erdem, D.; Rockwell, D.; Oshkai, P.L. & Pollack, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Mineral-filled polypropylene: Improvement of scratch resistance

Description: A potential alternative to acrylonitrile-butadiene-styrene (ABS) and polycarbonate+ABS (PC+ABS), pigmented mineral-filled polypropylene (PP) finds an opening in automotive interior components such as instrument panels, knee bolsters, consoles, etc. Because of the lack of surface aesthetics, pigmented mineral-filled PP is experiencing a limitation to its acceptance in many applications. This study focuses on exploring various mineral fillers and additives in polypropylene to provide a material w… more
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Date: December 2001
Creator: Khatib, Jamal F.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Catalog of Geologic Data for the Hanford Site

Description: This report catalogs the existing geologic data that can be found in various databases, published and unpublished reports, and in individuals' technical files. The scope of this catalog is primarily on the 100, 200, and 300 Areas, with a particular emphasis on the 200 Areas. Over 2,922 wells are included in the catalog. Nearly all of these wells (2,459) have some form of driller's or geologist's log. Archived samples are available for 1,742 wells. Particle size data are available from 1,078 wel… more
Date: September 19, 2001
Creator: Horton, Duane G.; Last, George V.; Gilmore, Tyler J. & Bjornstad, Bruce N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Catalog of Geologic Data for the Hanford Site

Description: This report catalogs the existing geologic data that can be found in various databases, published and unpublished reports, and in individuals' technical files. The scope of this catalog is primarily on the 100, 200, and 300 Areas, with a particular emphasis on the 200 Areas. Over 2,922 wells are included in the catalog. Nearly all of these wells (2,459) have some form of driller's or geologist's log. Archived samples are available for 1,742 wells. Particle size data are available from 1,078 wel… more
Date: September 19, 2001
Creator: Horton, Duane G; Last, George V; Gilmore, Tyler J & Bjornstad, Bruce N
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Strength Stainless Steel Properties that Affect Resistance Welding

Description: This report discusses results of a study on selected high strength stainless steel alloy properties that affect resistance welding. The austenitic alloys A-286, JBK-75 (Modified A-286), 21-6-9, 22-13-5, 316 and 304L were investigated and compared. The former two are age hardenable, and the latter four obtain their strength through work hardening. Properties investigated include corrosion and its relationship to chemical cleaning, the effects of heat treatment on strength and surface condition, … more
Date: August 1, 2001
Creator: Kanne, W.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Combining steam-methane reforming, water-gas shift, and CO{sub 2} removal in a single-step process for hydrogen production. Final report for period March 15, 1997 - December 14, 2000

Description: The objective of the research project was to determine the feasibility of a simpler, more energy-efficient process for the production of 95+% H{sub 2} from natural gas, and to collect sufficient experimental data on the effect of reaction parameters to guide additional larger-scale process development. The overall objectives were accomplished. 95+% H{sub 2} was produced in a single reaction step by adding a calcium-based CO{sub 2} acceptor to standard Ni-based reforming catalyst. The spent acce… more
Date: February 1, 2001
Creator: Ortiz, Alejandro Lopez; Balasubramanian, Bhaskar & Harrison, Douglas P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hanford Site Groundwater Monitoring for Fiscal Year 2000

Description: This report presents the results of groundwater and vadose zone monitoring and remediation for fiscal year 2000 on the U.S. Department of Energy's Hanford Site, Washington. The most extensive contaminant plumes are tritium, iodine-129, and nitrate, which all had multiple sources and are very mobile in groundwater. Carbon tetrachloride and associated organic constituents form a relatively large plume beneath the central part of the Site. Hexavalent chromium is present in smaller plumes beneath t… more
Date: March 1, 2001
Creator: Hartman, Mary J.; Morasch, Launa F. & Webber, William D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optimum Thread Rolling Process That Improves SCC Resistance

Description: Accelerated testing in environments aggressive for the specific material have shown that fastener threads that are rolled after strengthening heat treatments have improved resistance to SCC initiation. For example, intergranular SCC was produced in one day when machined (cut) threads of high strength steel (ASTM A193 B-7 and A354 Grade 8) were exposed to an aggressive aqueous environment containing 8 weight % boiling ammonium nitrate and stressed to about 40% of the steel's yield strength (120 … more
Date: October 29, 2001
Creator: Kephart, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Rules Committee Meeting]

Description: Email from Al Daniels to Michael Milliken on March 21, 2001, discussing rules about committee meeting. Handwritten note written on the back of recycled paper listing names and contact information. An email addressed to Ms. Malcolm, Ms. Hicks, and Mr. Sprouse on March 11, 2001, discussing TSDC petition in the form of a resolution. A Resolution to Add Seats for the LGBT Community on the State Democratic Executive Committee, addressing a list of officers and Board of Directors of TSDC. Document ab… more
Date: 2001
Item Type: Refine your search to only Text
Partner: UNT Libraries Special Collections
open access

Compositions, Functions, and Testing of Friction Brake Materials and Their Additives

Description: The purpose of this report is to present a survey of commercial brake materials and additives, and to indicate their typical properties and functions, especially as regards their use in heavy trucks. Most truck pad and shoe materials described here were designed to wear against cast iron. Brake material test methods are also briefly described. This report does not address issues associated with the fabrication and manufacturing of brake materials. Since there are literally thousands of brake ma… more
Date: October 22, 2001
Creator: Blau, PJ
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interfacing the Controllogics PLC over Ethernet/IP.

Description: The Allen-Bradley ControlLogix [1] line of programmable logic controllers (PLCs) offers several interfaces: Ethernet, ControlNet, DeviceNet, RS-232 and others. The ControlLogix Ethernet interface module 1756-ENET uses EtherNet/IP, the ControlNet protocol [2], encapsulated in Ethernet packages, with specific service codes [3]. A driver for the Experimental Physics and Industrial Control System (EPICS) has been developed that utilizes this EtherNet/IP protocol for controllers running the vxWorks … more
Date: January 1, 2001
Creator: Kasemir, K. U. (Kay-Uwe) & Dalesio, L. R. (Leo R.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mold Materials For Permanent Molding of Aluminum Alloys

Description: A test that involves immersion of the potential mod materials for permanent molds has been developed that provides a thermal cycle that is similar to the experienced during casting of aluminum in permanent molds. This test has been employed to determine the relative thermal fatigue resistance of several different types of mold materials. Four commercial mold coatings have been evaluated for their insulating ability, wear resistance and roughness. The results indicate that composition and struct… more
Date: September 14, 2001
Creator: Wallace, John F.; Schwam, David & Hong, Wen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The correlation of indentation size effect experiments with pyramidal and spherical indenters.

Description: Experiments were conducted in annealed iridium using pyramidal and spherical indenters over a wide range of load. For a Berkovich pyramidal indenter, the hardness increased with decreasing depth of penetration. However, for spherical indenters, hardness increased with decreasing sphere radius. Based on the number of geometrically necessary dislocations generated during indentation, a theory that takes into account the work hardening differences between pyramidal and spherical indenters is devel… more
Date: January 1, 2001
Creator: Swadener, J. G. (John G.); George, Easo P. & Pharr, G.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low-Power Direct-Sequence Spread-Spectrum Modem Architecture for Distributed Wireless Sensor Networks

Description: Emerging CMOS and MEMS technologies enable the implementation of a large number of wireless distributed microsensors that can be easily and rapidly deployed to form highly redundant, self-configuring, and ad hoc sensor networks. To facilitate ease of deployment, these sensors should operate on battery for extended periods of time. A particular challenge in maintaining extended battery lifetime lies in achieving communications with low power. This paper presents a direct-sequence spread-spectrum… more
Date: July 3, 2001
Creator: Chien, C; Elgorriaga, I & McConaghy, C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Foreign Travel Report - West Germany and Belgium - September 9 - September 13, 1985

Description: This report discusses visitation of the PAMELA plant which provided an opportunity to observe the operation and design of this European waste solidification facility. The aim of the workshop was to exchange expertise relative to the safe vitrification of HLLW in order to determine which areas were technologically solved and which areas required further study.
Date: May 17, 2001
Creator: Bickford, D.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Meso-Machining Capabilities

Description: Meso-scale manufacturing processes are bridging the gap between silicon-based MEMS processes and conventional miniature machining. These processes can fabricate two and three-dimensional parts having micron size features in traditional materials such as stainless steels, rare earth magnets, ceramics, and glass. Meso-scale processes that are currently available include, focused ion beam sputtering, micro-milling, micro-turning, excimer laser ablation, femtosecond laser ablation, and micro electr… more
Date: June 1, 2001
Creator: BENAVIDES,GILBERT L.; ADAMS,DAVID P. & YANG,PIN
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Uncertainty Analysis Framework - Hanford Site-Wide Groundwater Flow and Transport Model

Description: Pacific Northwest National Laboratory (PNNL) embarked on a new initiative to strengthen the technical defensibility of the predictions being made with a site-wide groundwater flow and transport model at the U.S. Department of Energy Hanford Site in southeastern Washington State. In FY 2000, the focus of the initiative was on the characterization of major uncertainties in the current conceptual model that would affect model predictions. The long-term goals of the initiative are the development a… more
Date: November 9, 2001
Creator: Cole, Charles R.; Bergeron, Marcel P.; Murray, Christopher J.; Thorne, Paul D.; Wurstner, Signe K. & Rogers, Phillip M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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