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406 Matching Results
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Tough, bio-inspired hybrid materials
The notion of mimicking natural structures in the synthesis of new structural materials has generated enormous interest but has yielded few practical advances. Natural composites achieve strength and toughness through complex hierarchical designs extremely difficult to replicate synthetically. Here we emulate Nature's toughening mechanisms through the combination of two ordinary compounds, aluminum oxide and polymethylmethacrylate, into ice-templated structures whose toughness can be over 300 times (in energy terms) that of their constituents. The final product is a bulk hybrid ceramic material whose high yield strength and fracture toughness ({approx}200 MPa and {approx}30 MPa{radical}m) provide specific properties comparable to aluminum alloys. These model materials can be used to identify the key microstructural features that should guide the synthesis of bio-inspired ceramic-based composites with unique strength and toughness.
Date:
October 6, 2008
Creator:
Munch, Etienne; Launey, Maximimilan E.; Alsem, Daan H.; Saiz, Eduardo; Tomsia, Antoni P. & Ritchie, Robert O.
Object Type:
Article
System:
The UNT Digital Library
The Uniformed and Overseas Citizens Absentee Voting Act: Background and Issues
Members of the military and U.S. citizens who live abroad are eligible to register and vote absentee in federal elections under the Uniformed and Overseas Citizens Absentee Voting Act (UOCAVA) of 1986. The law was enacted to improve absentee registration and voting for this group of voters and to consolidate existing laws. This report summarizes the UOCAVA and details modifications and improvements to the UOCAVA since its inception, as well as related pieces of legislation.
Date:
October 6, 2008
Creator:
Coleman, Kevin J.
Object Type:
Report
System:
The UNT Digital Library
[Woman with hand on framed art]
A photograph of a young woman with her hand touching the frame on a piece of art displayed on the UNT campus. It shows a silhouette of a female body in yellow, orange, and silvery-blue and another artwork is on the wall beside it.
Date:
October 6, 2008
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
1894 Penn Building on the Courthouse Square
Photograph of 1894 Penn Building on Main Street of the Courthouse Square in downtown Waxahachie, Texas.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1895 Ellis County Courthouse Clock Tower
Photograph of the 1895 Ellis County courthouse clock tower from the south. The clock tower is nine stories tall.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1895 Ellis County Courthouse Clock Tower and Eagles
Photograph of the clock and bell tower of the 1895 Ellis County Courthouse. A sculptures of eagles are perched on each side of the roof.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1895 Ellis County Courthouse Clock Tower Base and Eagle
Photograph of base of the tower and roof ridge, with an eagle sculpture perched on it, on the 1895 Ellis County Courthouse in downtown Waxahachie, Texas. A close up view of the detailed stone work on the tower base and one of the four eagle that grace the roof.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1895 Ellis County Courthouse Full View
Photograph of the 1895 Ellis County Courthouse in downtown Waxahachie, Texas.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1895 Ellis County Courthouse Texas Historical Commission Marker
Photograph of the Texas Historical Commission Marker on the lawn of the 1895 Ellis County Courthouse in downtown Waxahachie, Texas.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1895 Ellis County Courthouse Typical Entrance
Photograph of a typical entrance set in an inside corner on the 1895 Ellis County Courthouse in downtown Waxahachie, Texas. There are four main entrances set on the cardinal points of the compass. The Romanesque building was designed by architect James Riley Gordon. The building is massive limestone in gray for the foundation and Burnet limestone for structure, columns of rose colored granite columns, Pecos Red sandstone was used for arches, columns, and string courses. There are eagles and gargoyles for ornamentation.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1912 Rogers Hotel Entrance on Main Street
Photograph of the 100 East Main Street entrance to the Rogers Hotel in downtown Waxahatchie, Texas. It is a four story brick building with a recessed wall above the entrance.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
Activation of Carbon-Hydrogen Bonds via 1,2-Addition across M-X (X = OH or NH2) Bonds of d6 Transition Metals as a Potential Key Step in Hydrocarbon Functionalization: A Computational Study
Article discussing a computational study on the activation of carbon-hydrogen bonds via 1,2-addition across M-X (X = OH or NH2) bonds of d6 transition metals as a potential key step in hydrocarbon functionalization.
Date:
October 6, 2007
Creator:
Cundari, Thomas R., 1964-; Grimes, Thomas V. & Gunnoe, T. Brent
Object Type:
Article
System:
The UNT Digital Library
The Bastrop Advertiser (Bastrop, Tex.), Vol. 154, No. 64, Ed. 1 Saturday, October 6, 2007
Semi-weekly newspaper from Bastrop, Texas that includes local, state and national news along with advertising.
Date:
October 6, 2007
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 311, Ed. 1 Saturday, October 6, 2007
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 6, 2007
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
["Dallas Tenors" Part 1 of 2]
Video recording from The Black Academy of Arts and Letters recorded during their "Dallas Tenors" event in 2007. This video features performances by tenor singers Richard Omar and Bryan Wilson live on stage at Clarence Muse Café Theatre. This video is Part 1 of 2 of their performance.
Date:
October 6, 2007
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
["Dallas Tenors" Part 2 of 2]
Video recording from The Black Academy of Arts and Letters recorded during their "Dallas Tenors" event in 2007. This video features performances by tenor singers Richard Omar and Bryan Wilson live on stage at Clarence Muse Café Theatre. This video is Part 2 of 2 of their performance.
Date:
October 6, 2007
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
Ellis County Museum Building 201 South College Street
Photograph of the Ellis County Museum 201 South College Street in downtown Waxahachie, Texas.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
Oral History Interview with Earl E. Ambrose, October 6, 2007
Access:
Use of this item is restricted to the UNT Community
Interview with Earl E. Ambrose, Korean War veteran, as part of the Tarrant County War Veterans Oral History Project. The interview includes Ambrose's personal experiences of childhood, basic training, volunteering for service in Korea, and attending Arlington State College using GI Bill benefits. Additionally, Ambrose discusses family experiences in military service, the decision to join the Marines, assignments to Quantico and Yorktown, Virginia, his brief combat experience and assignment to the Main Line of Resistance near the Imjin River, his discharge from the Marines, and his career with Bell Helicopter.
Date:
October 6, 2007
Creator:
Ball, Gregory & Ambrose, Earl E.
Object Type:
Book
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 115, No. 193, Ed. 1 Saturday, October 6, 2007
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 6, 2007
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Texas Theater on the North Couthouse Square
Photograph of the Texas Theater building, at 110 West Main, on the North Courthouse Square in downtown Waxahachie, Texas. The building was original built in 1895 as a commercial brick building.
Date:
October 6, 2007
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
15th Street News (Midwest City, Okla.), Vol. 36, No. 6, Ed. 1 Friday, October 6, 2006
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 6, 2006
Creator:
Ray, Johnna
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Accelerator Markup Language and the Universal Accelerator Parser
A major obstacle to collaboration on accelerator projects has been the sharing of lattice description files between modeling codes. To address this problem, a lattice description format called Accelerator Markup Language (AML) has been created. AML is based upon the standard eXtensible Markup Language (XML) format; this provides the flexibility for AML to be easily extended to satisfy changing requirements. In conjunction with AML, a software library, called the Universal Accelerator Parser (UAP), is being developed to speed the integration of AML into any program. The UAP is structured to make it relatively straightforward (by giving appropriate specifications) to read and write lattice files in any format. This will allow programs that use the UAP code to read a variety of different file formats. Additionally, this will greatly simplify conversion of files from one format to another. Currently, besides AML, the UAP supports the MAD lattice format.
Date:
October 6, 2006
Creator:
Sagan, D.; Forster, M.; /Cornell U., LNS; Bates, D.A.; /LBL, Berkeley; Wolski, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Afghanistan: Post-War Governance, Security, and U.S. Policy
This report considers the transition in government meant to stabilize Afghanistan. Specifically, the report covers the increasing amount of insurgency in the region. The south in particular has seen a rise in insurgency due to the lack of economic progress made. The report also discusses the NATO led troops in the region.
Date:
October 6, 2006
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Agricultural Disaster Assistance
The U.S. Department of Agriculture (USDA) offers several permanently authorized programs to help farmers recover financially from a natural disaster, including federal crop insurance, the non-insured assistance program and emergency disaster loans. In recent years, Congress frequently has made supplemental financial assistance available to farmers and ranchers on an ad-hoc basis, most notably in the form of direct crop disaster payments and emergency livestock assistance. Congress provided an estimated $3.1 billion of such assistance in the Consolidated Appropriations Act of 2003 (P.L. 108-7) for 2001 and 2002 crop and livestock losses. Some farm groups would like to see similar assistance provided for 2003 losses, particularly in regions of the Midwest and West that have experienced prolonged drought conditions. To date, no ad-hoc assistance has been made available for 2003 losses.
Date:
October 6, 2006
Creator:
Chite, Ralph M.
Object Type:
Report
System:
The UNT Digital Library