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Displaying records 371 to 380 of 405 records.
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371. Nanometrology - FY 2003 Program and Selected Accomplishments
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Materials Science
Published: 12/15/2003
Authors: C M Allocca, Stephen Weil Freiman
Abstract: The emphasis on nanotechnology around the world is leading to the development and commercialization of unique products based upon significantly smaller devices and material ensembles. Materials at the nanoscale in three dimensions (NEMS, MEMS), two ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850109

372. First-Principles Calculations of the Dielectric Properties of Perovskite-Type Materials
Topic: Materials Science
Published: 11/1/2003
Author: Eric J Cockayne
Abstract: We compare first-principles (FP) calculations of the ionic effective charges, phonon frequencies, and static dielectric permittivities k^ds^ of several perovskite-type materials. Transition metal ions have anomalously large effective charges, though ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850677

373. Combinatorial Chemistry
Topic: Materials Science
Published: 10/13/2003
Authors: J D. Hewes, Debra L Kaiser, Alamgir Karim, Eric J. Amis
Abstract: In 1995, the rapid fabrication of tens, hundreds, and, eventually, tens of thousands of samples in two-dimensional arrays of discrete microscaled samples (pixels) using lithography methods developed for the electronics industry was reported. Importan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902276

374. BridgeLCC 2.0 Users Manual: Life-Cycle Costing Software for the Preliminary Design of Bridges (NIST GCR 03-853)
Series: Grant/Contract Reports (NISTGCR)
Report Number: 03-853
Topic: Materials Science
Published: 9/1/2003
Author: M A Ehlen
Abstract: BridgeLCC 2.0 is user-friendly software developed by the National Institute of Standards and Technology to help bridge designers determine the cost effectiveness of alternative bridge designs, construction and repair strategies, and construction mat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907943

375. Combining Magnets and Dielectrics: Crystal Chemistry in the BaO-Fe^d2^O^d3^-TiO^d2^ System
Topic: Materials Science
Published: 4/1/2003
Authors: T Siegrist, Terrell A Vanderah
Abstract: Phases observed in the Ba-Fe-Ti-O system are classified and described within the framework of close packed [O,Ba/O] layers, with the transition metals in either octahedral (titanium and iron) or tetrahedral (iron only) sites. The resulting crystal c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850669

376. Intermetallics Formation and Growth at the Interface of Tin-Based Solder Alloys and Copper Substrates
Topic: Materials Science
Published: 2/17/2003
Authors: Juan C Madeni, S X Liu, Thomas Allen Siewert
Abstract: Increasing concerns regarding environmental contamination is driving the soldering research community to develop lead-free solder alloys. Previous studies have shown that Sn-based alloys such as Sn-3.5Ag, Sn-0.7Cu, Sn-9Zn, and Sn-3.2Ag-O. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851327

377. Subsolidus Phase Equilibria and Crystal Chemistry in the System BaO-TiO^d2^-Ta^d2^O^d5^
Topic: Materials Science
Published: 1/1/2003
Authors: Terrell A Vanderah, Robert S. Roth, T Siegrist, W Febo, J. M. Loezos, Winnie K Wong-Ng
Abstract: Subsolidus phase relations have been determined for the BaO: TiO^d2^Ta^d2^O^d5^ system. Approximately 100 specimens were prepared in air at temperatures near but below the solidus (1275 C to 1500 C). For the binary BaO: Ta^d2^O^d5^ subsystem, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850602

378. Phase Equilibria and Crystal Chemistry in the BaO-Al^d2^O^d3^-Nb^d2^O^d5^ and BaO-Nb^d2^O^d5^ Systems
Topic: Materials Science
Published: 11/1/2002
Authors: Terrell A Vanderah, B C Collins, Winnie K Wong-Ng, Robert S. Roth, L Farber
Abstract: Subsolidus phase equilibria in the BaO:Al^d2^O^d3^:Nb^d2^O^d5^ system at ~1250 C in air have been determined. Ternary compound formation in this system is limited to one new phase, Ba^d5.75^Al^d0.75^Nb^d9.25^O^d30^ (Ba^d6-x^Al^d1-x^Nb9+xO30, x=0.25; ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850531

379. Talking Ceramics
Topic: Materials Science
Published: 11/1/2002
Author: Terrell A Vanderah
Abstract: This is an invited Perspective article describing the technical needs and state-of-the-art research activities in the materials science of microwave ceramics, especially dielectric materials which serve as critical elements in resonators and filters ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850668

380. Application of an On-Line Weld Monitoring System
Topic: Materials Science
Published: 9/12/2002
Authors: Thomas Allen Siewert, Ivan Samardzic, Stefanija Klaric
Abstract: quisition analysis and real-time manipulation of the welding parameters offer added controls over the weld quality. Thanks to the continual development of information technology and electronics, it is possible to improve the systems for monitoring ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851294



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