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Effect of thin-film coating on wear in EGR-contaminated oil.
Increased use of higher-efficiency compression ignition direct injection (CIDI) diesel engines instead of today's gasoline engines will result in reduced fuel consumption and greenhouse gases emissions. However, NO{sub x} and particulate exhaust emissions from diesel engines must be significantly reduced due to their possible adverse health effects. Exhaust gas recirculation (EGR) is an effective way to reduce NO{sub x} emissions from diesel engines, but the particulates and acidic exhaust products in the recirculated gas will contaminate engine lubricant oil by increasing the soot content and total acid number (TAN). These factors will increase the wear rate in many critical engine components and seriously compromise engine durability. We have investigated the use of commercially available thin and hard coatings (TiN, TiCN, TiAlN, and CrN) to mitigate the negative effects of EGR on wear. In tests with the four-ball machine according to ASTM D4172, we found that all the four coatings deposited on M-50 steel significantly reduced wear in EGR-contaminated oils when compared with uncoated M50 steel balls.
Date:
December 6, 2001
Creator:
Ajayi, O. O.; Aldajah, S. H.; Erdemir, A. & Fenske, G. R.
Object Type:
Article
System:
The UNT Digital Library
Performance of amorphous carbon coating in turbocompressor air bearings.
None
Date:
December 6, 2001
Creator:
Ajayi, O. O.; Woodford, J. B.; Erdemir, A. & Fenske, G. R.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Elijah Collins, Jr., December 6, 2001
Access:
Use of this item is restricted to the UNT Community
Interview with Navy veteran Elijah Collins Jr. The interview includes Collins' personal experiences while aboard the destroyer USS Blue during the Japanese attack at Pearl Harbor on December 7, 1941. Collins also talks about the Battle of Savo Island and the sinking of the Blue.
Date:
December 6, 2001
Creator:
Alexander, William J. & Collins, Elijah, Jr.
Object Type:
Book
System:
The UNT Digital Library
Oral History Interview with Herb Elfering, December 6, 2001
Access:
Use of this item is restricted to the UNT Community
Interview with electrical engineer and Army veteran Herb Elfering, The interview includes Elfering's personal experiences with a searchlight/radar battery, 251st Coast Artillery Regiment, at camp Malekole during the Japanese attack at Pearl Harbor on December 7, 1941. Elfering also gives brief descriptions of his later experiences at Bougainville and Luzon.
Date:
December 6, 2001
Creator:
Alexander, William J. & Elfering, Herb
Object Type:
Book
System:
The UNT Digital Library
Oral History Interview with Alan A. Fouts, December 6, 2001
Access:
Use of this item is restricted to the UNT Community
Interview with Navy veteran Alan A. Fouts. The interview includes Fouts' personal experiences while assigned to the Submarine Base during the Japanese attack at Pearl Harbor on December 7, 1941, and his subsequent service aboard the submarine USS Pogy in the Pacific Theater during World War II.
Date:
December 6, 2001
Creator:
Alexander, William J. & Fouts, Alan A., 1920-
Object Type:
Book
System:
The UNT Digital Library
Immobilization of AM-241, Formed Under Plutonium Metal Conversion into Monazite-Type Ceramics
Lanthanum orthophosphate with the monazite structure was proposed on examinations as a suitable matrix for immobilization of future americium-containing liquid wastes, which could be formed in conversion of metallic plutonium into oxide at PA ''Mayak.'' Specimens of monazite non-active ceramics were fabricated from LaPOA powders obtained using a thin-film evaporator by either hot-pressing or cold-pressing and sintering at 900-1300 C. According to electron microprobe analysis (EMPA), scanning electron microscopy (SEM), and X-ray diffraction (XRD), which were used for characterization of produced samples, all specimens did not contain any phase other than the monoclinic monazite phase. Ceramics having the specific activity of Am-241 2.13 {center_dot}10{sup 7} Bq/g were prepared by only cold-pressing with subsequent sintering at 1300 C during 1 hour. The normalized leach rates of lanthanum and americium in distilled water at 90 C were less than 1.2. 10{sup 4} and 2.3 10{sup -4} g/m{sup 2} {center_dot} day, respectively.
Date:
June 6, 2001
Creator:
Aloy, A. S.; Kovarskaya, E. N.; Koltsova, T. I.; Samoylov, S. E.; Rovnyi, S. I.; Medvedev, G. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Improving Information Technology to Maximize Fenestration Energy Efficiency
Improving software for the analysis of fenestration product energy efficiency and developing related information technology products that aid in optimizing the use of fenestration products for energy efficiency are essential steps toward ensuring that more efficient products are developed and that existing and emerging products are utilized in the applications where they will produce the greatest energy savings. Given the diversity of building types and designs and the climates in the U.S., no one fenestration product or set of properties is optimal for all applications. Future tools and procedures to analyze fenestration product energy efficiency will need to both accurately analyze fenestration product performance under a specific set of conditions and to look at whole fenestration product energy performance over the course of a yearly cycle and in the context of whole buildings. Several steps have already been taken toward creating fenestration product software that will provide the information necessary to determine which details of a fenestration product's design can be improved to have the greatest impact on energy efficiency, what effects changes in fenestration product design will have on the comfort parameters that are important to consumers, and how specific fenestration product designs will perform in specific applications. Much …
Date:
June 6, 2001
Creator:
Arasteh, Dariush; Mitchell, Robin; Kohler, Christian; Huizenga,Charlie & Curcija, Dragan
Object Type:
Article
System:
The UNT Digital Library
ISO 14001 EMS VALUE PROPOSITION.
The objective of this report is to identify business opportunities and value for Battelle Organizations to undertake IS0 14001 Environmental Management System Implementation and registration to the international standard as a corporate strategic initiative.
Date:
November 6, 2001
Creator:
BRIGGS,S.L.K.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 30, No. 22, Ed. 1 Friday, April 6, 2001
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 6, 2001
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Far-infrared absorption in Sb-doped Ge epilayers near the metal-insulator transition
None
Date:
December 6, 2001
Creator:
Bandaru, Jordana; Beeman, Jeffrey W. & Haller, Eugene E.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with R. A. Barbezat, December 6, 2001
The National Museum of the Pacific War presents an interview with R A Barbezat. Barbazet joined the Navy in 1939. He served as a second-class fireman aboard USS California (BB-44). They were moored on the southern side of Ford Island, the southernmost ship along Battleship Row when the Japanese attack occurred. Barbezat later served aboard USS Astoria (CA-34) until it was sunk during the Battle of Savo Island in August of 1942. He then served two years aboard USS Coral Sea (CVE-57). They completed naval operations supporting attacks on the Gilbert and Marshall Islands. Barbezat returned to the US and was discharged in November of 1945.
Date:
December 6, 2001
Creator:
Barbezat, R. A.
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with R. A. Barbezat, December 6, 2001
The National Museum of the Pacific War presents an interview with R A Barbezat. Barbazet joined the Navy in 1939. He served as a second-class fireman aboard USS California (BB-44). They were moored on the southern side of Ford Island, the southernmost ship along Battleship Row when the Japanese attack occurred. Barbezat later served aboard USS Astoria (CA-34) until it was sunk during the Battle of Savo Island in August of 1942. He then served two years aboard USS Coral Sea (CVE-57). They completed naval operations supporting attacks on the Gilbert and Marshall Islands. Barbezat returned to the US and was discharged in November of 1945.
Date:
December 6, 2001
Creator:
Barbezat, R. A.
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Jim Barclay, December 6, 2001
The National Museum of the Pacific War presents an oral interview with J.M. Barclay. Barcaly was born in Broadus, Texas 12 September 1923. Upon joining the Navy in 1941 he went to San Diego for boot camp. He then was assigned to the USS Utah (BB-31) as a helmsman. The ship was at Pearl Harbor on 7 December 1941 and Barclay recalls observing Japanese planes attacking the fleet and a bomb hitting the Utah. He abandoned ship and tells of Japanese planes strafing men in the water. He assisted in recovering bodies of sailors from the USS Arizona (BB-39). Later in the evening, among a group of sailors resting on an oil tanker, Barclay’s group was subjected to friendly fire, resulting in casualties. For several weeks before the attack, Barclay recalls seeing a foreign submarine on the surface near the ship on a daily basis. He would report the sighting to the captain but no action was taken. In early 1942 he was transferred to the USS Honolulu (CL-48). He recounts several battles and recalls the Honolulu having forty feet of her bow blown off by a torpedo. After a short period of shore duty Barclay was transferred to the …
Date:
December 6, 2001
Creator:
Barclay, Jim
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Jim Barclay, December 6, 2001
The National Museum of the Pacific War presents an oral interview with J.M. Barclay. Barcaly was born in Broadus, Texas 12 September 1923. Upon joining the Navy in 1941 he went to San Diego for boot camp. He then was assigned to the USS Utah (BB-31) as a helmsman. The ship was at Pearl Harbor on 7 December 1941 and Barclay recalls observing Japanese planes attacking the fleet and a bomb hitting the Utah. He abandoned ship and tells of Japanese planes strafing men in the water. He assisted in recovering bodies of sailors from the USS Arizona (BB-39). Later in the evening, among a group of sailors resting on an oil tanker, Barclay’s group was subjected to friendly fire, resulting in casualties. For several weeks before the attack, Barclay recalls seeing a foreign submarine on the surface near the ship on a daily basis. He would report the sighting to the captain but no action was taken. In early 1942 he was transferred to the USS Honolulu (CL-48). He recounts several battles and recalls the Honolulu having forty feet of her bow blown off by a torpedo. After a short period of shore duty Barclay was transferred to the …
Date:
December 6, 2001
Creator:
Barclay, Jim
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Jerold W. Barnes, December 6, 2001
The National Museum of the Pacific War presents an interview with Jerold Barnes. Barnes joined the Coast Guard in September of 1940. He recalls serving aboard one of the ships that was turned over to the English during the Lend-Lease program in 1941. He remained aboard his ship to help train the English crew. Barnes was present in Pearl Harbor when the Japanese attacked. He completed Officer’s Training School at the Coast Guard Academy. He later served aboard the USS Shoshone (AKA-65), providing air and sea rescue services. He returned to the US and was discharged in 1945.
Date:
December 6, 2001
Creator:
Barnes, Jerold W
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Jerold W. Barnes, December 6, 2001
The National Museum of the Pacific War presents an interview with Jerold Barnes. Barnes joined the Coast Guard in September of 1940. He recalls serving aboard one of the ships that was turned over to the English during the Lend-Lease program in 1941. He remained aboard his ship to help train the English crew. Barnes was present in Pearl Harbor when the Japanese attacked. He completed Officer’s Training School at the Coast Guard Academy. He later served aboard the USS Shoshone (AKA-65), providing air and sea rescue services. He returned to the US and was discharged in 1945.
Date:
December 6, 2001
Creator:
Barnes, Jerold W
Object Type:
Text
System:
The Portal to Texas History
Observations of microstructural coarsening in micro flip-chip solder joints
Coarsening of solder microstructures dramatically affects fatigue lifetimes. This paper presents a study of microstructural evolution due to thermal cycling and aging of small solder joints.
Date:
March 6, 2001
Creator:
Barney, Monica M. & Morris, John W., Jr.
Object Type:
Article
System:
The UNT Digital Library
Towards a perturbative theory of nuclear forces
The authors show that an expansion of nuclear forces about the chiral limit is formally consistent and is equivalent to KSW power counting in the {sup 1}S{sub 0} channel and Weinberg power counting in the {sup 3}S{sub 1}--{sup 3}D{sub 1} coupled channels. Numerical evidence suggests that this expansion converges. The feasibility of making contact between nuclear physics and lattice-QCD simulations is discussed.
Date:
January 6, 2001
Creator:
Beane, S. R.; Bedaque, P. F.; Savage, M. J. & van Kolck, U.
Object Type:
Report
System:
The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 20, No. 30, Ed. 1 Thursday, September 6, 2001
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
September 6, 2001
Creator:
Beesley, Tom
Object Type:
Newspaper
System:
The Portal to Texas History
The Clean Coal Technology Program: Current Prospects
The Clean Coal Technology (CCT) program, started in the 1980's and funded generously in the early 1990's, has completed most of its surviving projects and has not funded any new ones since 1994. However, President Bush’s FY2002 budget outline proposed spending $2 billion over 10 years on a restructured CCT program. It is not clear what kind of projects would be included in the new program.
Date:
April 6, 2001
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Simulations of shock-induced mixing& combustion of an acetylene cloud in a chamber
In this paper we present numerical simulations of the interaction of a blast wave with an acetylene bubble in a closed chamber. We model the system using the inviscid Euler equations for a mixture of ideal gases. The formulation specifies the thermodynamic behavior of the system using a Chemkin interface and includes the capability to model combustion as the ambient air mixes with the acetylene. The simulations are performed using a three-dimensional adaptive mesh refinement algorithm based on a second-order Godunov integration scheme. Simulations are compared with experimental measurements for the same configuration.
Date:
February 6, 2001
Creator:
Bell, J B; Day, M S; Beckner, V E; Kuhl, A L; Neuwald, P & Reichenbach, H
Object Type:
Article
System:
The UNT Digital Library
Rock Physics Interpretation of P-Wave Q and Velocity Structure, Geology, Fluids and Fractures at the Southeast Portion of The Geysers Geothermal Reservoir
We examine how quantitative rock physics models, such as effective medium theories, can improve the interpretation of seismic parameters and material and fluid properties at The Geysers. We use effective medium theories to estimate effects of fractures on velocities for The Geysers rocks. We compare theoretical velocity estimates to laboratory measurements from the literature and our seismic velocity values from 1992 earthquake data. We approximate the reservoir as being homogeneous in mineral composition, with a constant density of fractures whose total void ratio is reduced by lithostatic pressure. Thus, we expect low velocities near the surface, increasing with depth up to the values observed in the lab on intact samples, 5.5 - 5.7 km/sec. We use a one-dimensional inversion of P-waves to obtain an ''expected'' P-wave velocity (Vp) and attenuation (Qp) relation as a function of depth for The Geysers rocks. We then use a three-dimensional Vp and Qp inversion to find anomalous zones within the reservoir. We find portions with ''high'' Vp and Qp, high Vp and low Qp, and low Vp and low Qp. We interpret the regions with high Vp and Qp to be relatively less fractured, and the regions with low Vp and Qp to be …
Date:
April 6, 2001
Creator:
Berge, P; Hutchings, L; Wagoner, J & Kasameyer, P
Object Type:
Article
System:
The UNT Digital Library
Overview of the NETL Onsite Fuel Cell R&D Program
Onsite fuel cell R&D at the National Energy Technology Laboratory (NETL) has been ongoing since the late 1990's. The objective of the onsite program is to support development efforts of the fuel cell technology-related product lines and conduct fundamental research of advanced fuel cell technology. Of special focus is NETL's new 10-yr, multimillion dollar development program call the Solid State Energy Conversion Alliance (SECA). This program is aimed at developing low-cost mass manufactured solid oxide fuel cell technology for a wide variety of applications. In addition to SECA, there are a variety of other products/programs at NETL that can be supported by the onsite R&D group. Vision 21 is one such program and is the U. S. Department of Energy's initiative to deploy high efficiency, ultra-clean co-production coal conversion power plants in the twenty-first century. These plants will consist of power and coproduction modules, which are integrated to meet specific power and chemical markets. In response to these program initiatives, NETL's onsite R&D group is developing significant capability and focusing current activity on the following areas: (1) High-Temperature Fuel Cell Test & Characterization; (2) Integrated Fuel Processing; (3) Fuel Cell Component and Systems Modeling; and (4) Sensors, Controls, and Instrumentation. …
Date:
November 6, 2001
Creator:
Berry, David A. & Gemmen, Randall S.
Object Type:
Article
System:
The UNT Digital Library
The Discharge Rule in the House: Recent Use in Historical Context
None
Date:
August 6, 2001
Creator:
Beth, Richard S.
Object Type:
Report
System:
The UNT Digital Library