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Experimental determination of drag coefficients in low-density polyurethane foam (open access)

Experimental determination of drag coefficients in low-density polyurethane foam

We describe several experiments performed at the LLNL Site 300 firing range and on the LLNL 1/3 scale gun to investigate the deceleration of small projectiles (l {approx} 3-5 [mm]) in low-density foam ({rho} {approx} 0.08-0.32 [g/cm{sup 3}]). The experiments at the firing range researched a passive velocity diagnostic based on Faraday's law of induction, while experiments on the 1/3 scale gun investigated the effects of varying projectile surface area, projectile shape, and foam density on the drag coefficient c{sub d}. Analysis shows that the velocity diagnostic has an uncertainty on the order of 1 percent for projectiles with velocity v {approx} 0.8-1.2 [km/s]. The 1/3 scale gun experiments, dubbed the Krispy Kreme series, included nine shots considering the combinations of 3 projectile surface areas with 3 target densities. The experiments used Tantalum square surface area block projectiles (with an initial velocity v{sub 0} {approx} 1.2 [km/s], a common thickness T = 2.67 [mm], and square side lengths of 3, 4, and 5 [mm]) decelerating in polyurethane foams (with densities {rho}{sub f} of 0.08, 0.16 and 0.32 [g/cm{sup 3}]). Standard fluid models of the Krispy Kreme experiments predict Reynolds numbers Re {approx} 10{sup 5} - 10{sup 6}, Mach numbers Ma …
Date: April 18, 2006
Creator: Adams, M L
Object Type: Report
System: The UNT Digital Library
Quarterly Progress Report - Biological Monitoring Program for East Fork Poplar Creek (open access)

Quarterly Progress Report - Biological Monitoring Program for East Fork Poplar Creek

In May 1985, a National Pollutant Discharge Elimination System (NPDES) permit was issued for the Oak Ridge Y-12 Plant. As a condition of the permit, a Biological Monitoring and Abatement Program (BMAP) was developed to demonstrate that the effluent limitations established for the Y-12 Plant protect the classified uses of the receiving stream (East Fork Poplar Creek; EFPC), in particular, the growth and propagation of aquatic life (Loar et al. 1989). A second objective of the BMAP is to document the ecological effects resulting from the implementation of a water pollution control program designed to eliminate direct discharges of wastewaters to EFPC and to minimize the inadvertent release of pollutants to the environment. Because of the complex nature of the discharges to EFPC and the temporal and spatial variability in the composition of the discharges, a comprehensive, integrated approach to biological monitoring was developed. A new permit was issued to the Y-12 Plant on April 28, 1995 and became effective on July 1, 1995. Biological monitoring continues to be required under the new permit. The BMAP consists of four major tasks that reflect different but complementary approaches to evaluating the effects of the Y-12 Plant discharges on the aquatic integrity …
Date: April 18, 2000
Creator: Adams, S. M.; Christensen, S. W.; Greeley, M. S. Jr.; Hill, W. R.; McCarthy, J. F.; Peterson, M. J. et al.
Object Type: Report
System: The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 15, Ed. 1 Sunday, April 18, 2004 (open access)

Altus Times (Altus, Okla.), Vol. 106, No. 15, Ed. 1 Sunday, April 18, 2004

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: April 18, 2004
Creator: Andrews, Mike
Object Type: Newspaper
System: The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 15, Ed. 1 Monday, April 18, 2005 (open access)

Altus Times (Altus, Okla.), Vol. 107, No. 15, Ed. 1 Monday, April 18, 2005

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: April 18, 2005
Creator: Andrews, Mike
Object Type: Newspaper
System: The Gateway to Oklahoma History

Doctoral Recital: 2007-04-18 - Alfredo Arjona, piano

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
Date: April 18, 2007
Creator: Arjona, Alfredo
Object Type: Sound
System: The UNT Digital Library
Atmospheric Radiation Measurement Program Facilities Newsletter, March 2002. (open access)

Atmospheric Radiation Measurement Program Facilities Newsletter, March 2002.

Monthly newsletter discussing news and activities related to the Atmospheric Radiation Measurement Program, articles about weather and atmospheric phenomena, and other related topics.
Date: April 18, 2002
Creator: Atmospheric Radiation Measurement Program (U.S.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Study of B Meson Decays with Excited eta and eta-prime Mesons (open access)

Study of B Meson Decays with Excited eta and eta-prime Mesons

Using 383 million B{bar B} pairs from the BABAR data sample, they report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to K{bar K}* or {eta}{pi}{pi} final states with mass in the range (1.2-1.8) GeV/c{sup 2}. They observe a significant enhancement at the low K{bar K}* invariant mass which is interpreted as B{sup +} {yields} {eta}(1475)K{sup +}, find evidence for the decay B{sup +} {yields} {eta}(1295)K{sup +}, and place upper limits on the decays B{sup +} {yields} {eta}(1405)K{sup +}, B{sup +} {yields} f{sub 1}(1285)K{sup +}, B{sup +} {yields} f{sub 1}(1420)K{sup +}, and B{sup +} {yields} {phi}(1680)K{sup +}.
Date: April 18, 2008
Creator: Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J. P.; Poireau, V. et al.
Object Type: Article
System: The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 32, No. 25, Ed. 1 Friday, April 18, 2003 (open access)

15th Street News (Midwest City, Okla.), Vol. 32, No. 25, Ed. 1 Friday, April 18, 2003

Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date: April 18, 2003
Creator: Baldwin, Alisha
Object Type: Newspaper
System: The Gateway to Oklahoma History

Senior Recital: 2009-04-18 - Rachel Baldwin, flute

Access: Use of this item is restricted to the UNT Community
A senior recital presented at the UNT College of Music Concert Hall.
Date: April 18, 2009
Creator: Baldwin, Rachel
Object Type: Sound
System: The UNT Digital Library

[Maple Hall residents perform Hall of the Year presentation, 1]

Photograph of Maple Hall residents performing a skit during their Hall of the Year presentation. Ten individuals can be seen facing a projector screen showing desert scenery. Eight individuals are kneeling, and two are standing. Several members of the group are raising their arms.
Date: April 18, 2006
Creator: Baugh, Brian
Object Type: Photograph
System: The UNT Digital Library

[Maple Hall residents perform Hall of the Year presentation, 2]

Photograph of Maple Hall residents performing a skit during their Hall of the Year presentation. Eleven individuals can be seen facing to the left of the camera, raising their arms in different positions. Two individuals in the front of the group are clapping. Desert scenery is being projected onto the wall behind them.
Date: April 18, 2006
Creator: Baugh, Brian
Object Type: Photograph
System: The UNT Digital Library

[Student performs Hall of Year skit]

Photograph of a student performing a skit during the Hall of the Year event hosted by UNT's Residence Hall Association. The young man is standing in front of a blank wall, facing to the left of the camera and holding a tissue over his nose. A football is visible on the floor next to his feet.
Date: April 18, 2006
Creator: Baugh, Brian
Object Type: Photograph
System: The UNT Digital Library

[Student performs Napoleon Dynamite dance at Hall of the Year contest]

Photograph of a member of the Santa Fe Square and Traditions Hall team performing a dance sequence from "Napoleon Dynamite" during UNT's Hall of the Year event. The young man can be seen standing in the center of the photograph with his hands in the front pockets of his pants, looking down. Text on the front of his t-shirt reads, "VOTE FOR SFT."
Date: April 18, 2006
Creator: Baugh, Brian
Object Type: Photograph
System: The UNT Digital Library

Future Emissions Impact On Off-Road Vehicles

Summaries of paper: Emission requirements dictate vehicle update cycles; Packaging, performance and cost impacted; Styling updates can be integrated; Opportunity to integrate features and performance; Non-uniform regulations challenge resources; and Customers won't expect to pay more or receive less.
Date: April 18, 2001
Creator: Baumgard, Kirby & Ephraim, Steve
Object Type: Presentation
System: The UNT Digital Library
Humane Treatment of Farm Animals: Overview and Issues (open access)

Humane Treatment of Farm Animals: Overview and Issues

None
Date: April 18, 2007
Creator: Becker, Geoffrey S.
Object Type: Report
System: The UNT Digital Library
Supplemental Appropriations FY2003: Iraq Conflict, Afghanistan, Global War on Terrorism, and Homeland Security (open access)

Supplemental Appropriations FY2003: Iraq Conflict, Afghanistan, Global War on Terrorism, and Homeland Security

None
Date: April 18, 2003
Creator: Belasco, Amy & Nowels, Larry
Object Type: Report
System: The UNT Digital Library
The Rice Thresher, Vol. 90, No. 27, Ed. 1 Friday, April 18, 2003 (open access)

The Rice Thresher, Vol. 90, No. 27, Ed. 1 Friday, April 18, 2003

A weekly student newspaper from the Rice University in Houston, Texas that includes campus news and commentaries along with advertising.
Date: April 18, 2003
Creator: Berenson, Mark
Object Type: Newspaper
System: The Portal to Texas History
Using High-Speed WANs and Network Data Caches to Enable Remote and Distributed Visualization (open access)

Using High-Speed WANs and Network Data Caches to Enable Remote and Distributed Visualization

Visapult is a prototype application and framework for remote visualization of large scientific datasets. We approach the technical challenges of tera-scale visualization with a unique architecture that employs high speed WANs and network data caches for data staging and transmission. This architecture allows for the use of available cache and compute resources at arbitrary locations on the network. High data throughput rates and network utilization are achieved by parallelizing I/O at each stage in the application, and by pipe-lining the visualization process. On the desktop, the graphics interactivity is effectively decoupled from the latency inherent in network applications. We present a detailed performance analysis of the application, and improvements resulting from field-test analysis conducted as part of the DOE Combustion Corridor project.
Date: April 18, 2000
Creator: Bethel, Wes; Lau, Stephen; Tierney, Brian; Lee, Jason & Gunter, Dan
Object Type: Article
System: The UNT Digital Library

Doctoral Recital: 2008-04-18 - Tony Bianchetta, alto and tenor trombone

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: April 18, 2008
Creator: Bianchetta, Tony
Object Type: Sound
System: The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 26, No. 11, Ed. 1 Wednesday, April 18, 2007 (open access)

The Colony Courier-Leader (The Colony, Tex.), Vol. 26, No. 11, Ed. 1 Wednesday, April 18, 2007

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date: April 18, 2007
Creator: Bick, Jack & Crimmins, Blaine
Object Type: Newspaper
System: The Portal to Texas History
The Harper Herald (Harper, Tex.), Vol. [70], No. [16], Ed. 1 Tuesday, April 18, 2000 (open access)

The Harper Herald (Harper, Tex.), Vol. [70], No. [16], Ed. 1 Tuesday, April 18, 2000

Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date: April 18, 2000
Creator: Bishop, Karen
Object Type: Newspaper
System: The Portal to Texas History
[TBAAL Commercial for "Wild Women Blues"] captions transcript

[TBAAL Commercial for "Wild Women Blues"]

Video recording from The Black Academy of Arts and Letters recorded during their Wild Women Blues, :30 second television spot. featuring on CBS 11. The BetaCam footage shows the commercial beginning at the :40 second mark with clips of featured singers such as Linda Hopkins and Maxine Weldon performing on stage in various venues. The commercial gives the dates for their performance at the Academy to be the first of week of June 2002.
Date: April 18, 2002
Creator: Bolton Curely Media Services
Object Type: Video
System: The UNT Digital Library
[Commercial for "Wild Women Blues"] captions transcript

[Commercial for "Wild Women Blues"]

Video footage featuring a commercial advertising "Wild Women Blues," produced by The Black Academy of Arts and Letters organization in Dallas, Texas. The performance was set to premiere on June 4 and run through June 9, 2002 at the Dallas Convention Center Theatre.
Date: April 18, 2002
Creator: Bolton-Curley Media Services
Object Type: Video
System: The UNT Digital Library
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 107, No. 38, Ed. 1 Thursday, April 18, 2002 (open access)

The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 107, No. 38, Ed. 1 Thursday, April 18, 2002

Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date: April 18, 2002
Creator: Bridges, G. Frank & Bridges, Georgie
Object Type: Newspaper
System: The Portal to Texas History