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Topic Area: Materials Science
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Displaying records 481 to 490 of 509 records.
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481. Tooth chipping can reveal bite forces and diets of fossil hominins
Topic: Materials Science
Published: 6/16/2010
Authors: Paul Constantino, James J. Lee, H Chai, Bernhard Zipfel, Charles Ziscovici, Brian Ronald Lawn, Peter Lucas
Abstract: Fossil hominin tooth enamel often exhibits antemortem edge chipping (Robinson 1954; Tobias 1967; Wallace 1973). Here we apply a simple fracture equation to estimate peak bite forces from the sizes of such chips. This equation, previously validated ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904073

482. Towards a Classification System of Manufacturing Objects for the Evaluation of Perception Systems
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7985
Topic: Materials Science
Published: 2/27/2014
Authors: Geraldine S Cheok, Marek Franaszek, Afzal A Godil, Kamel Shawki Saidi, Roger Eastman, Tsai Hong Hong
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915160

483. Towards a Reference Polyurethane Foam and Bench Scale Test for Assessing Smoldering in Upholstered Furniture
Topic: Materials Science
Published: 12/8/2013
Authors: Mauro Zammarano, Szabolcs Matko, William M Pitts, Douglas Matthew Fox, Rick D Davis
Abstract: Smoldering poses a severe fire hazard due to the potentially lethal amount of toxic carbon monoxide released, and the possibility to reach flashover (through transition from smoldering to flaming) with heat sources otherwise too weak to directly ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914809

484. Transmission EBSD in the Scanning Electron Microscope
Topic: Materials Science
Published: 5/1/2013
Authors: Roy Howard Geiss, Katherine P Rice, Robert R Keller
Abstract: A new method for obtaining Kikuchi diffraction patterns from thin specimens in transmission has been developed for use in the SEM, scanning electron microscope, using a conventional electron backscatter diffraction (EBSD) detector and with a slight m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912886

485. Transverse Fracture of Brittle Bilayers Relevance to Failure of All-Ceramic Dental Crowns
Topic: Materials Science
Published: 3/1/2006
Authors: Jeonghwan Kim, Sanjit Bhowmick, Ilja Hermann, Brian Ronald Lawn
Abstract: A study is made of the behavior of cracks approaching interfaces in all-ceramic crown-like bilayers. Flat specimens are fabricated by fusing porcelain veneers onto Y-TZP and alumina core ceramic plates, with veneer/core matching to minimize residual ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850132

486. Tunable Ionic-Conductivity of Collapsed Sandia Octahedral Molecular Sieves (SOMS)
Topic: Materials Science
Published: 9/12/2007
Authors: Jason D Pless, Terry J Garino, James E Maslar, Tina M Nenoff
Abstract: The structure-property relationship between atomic cation substitution and bulk scale conductivity in perovskites has been studied systematically. A series of Na-Nb perovskites has been synthesized via two methods (1) ion-exchange or (2) synthetic me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830985

487. Tuning Polymer Melt Fragility With Antiplasticizer Additives
Topic: Materials Science
Published: 6/19/2007
Authors: Robert A Riggleman, Jack F Douglas, J J de Pablo
Abstract: A polymer-diluent model exhibiting antiplasticization has beendeveloped and characterized by molecular dynamics simulations. Antiplasticizer molecules are shown to decrease the glass transition temperature Tg, but to increase the elastic moduli o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852717

488. UV-induced photochemical transformations of citrate capped silver nanoparticle suspensions
Topic: Materials Science
Published: 9/14/2012
Authors: Justin M Gorham, Robert I. MacCuspie, Kate L Klein, D Howard Fairbrother, Richard D Holbrook
Abstract: Due to the increasing use of silver nanoparticles (AgNPs) in consumer products, it is essential to understand how variables, such as light exposure, may change the physical and chemical characteristics of AgNP suspensions. To this end, the effect o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911250

489. Ultra-small-Angle X-ray Scattering ‹ X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites
Topic: Materials Science
Published: 2/28/2012
Authors: Fan Zhang, Andrew John Allen, Lyle E Levine, Laura Espinal, Joseph M Antonucci, Drago Skrtic, Justin N.R. O'Donnell, Jan Ilavsky
Abstract: The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon heating using both static, bulk measurement techniques and recently developed ultra-small angle X-ray scattering ‹ X-ray photon correlation sp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906876

490. Ultrathin Adhesives: Confinement Effect on Modulus
Topic: Materials Science
Published: 2/15/2009
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: In this work, we will employ this wrinkling metrology to extract the modulus of polymer thin films for a homologous series of poly(n-alkyl methacrylate)s. In particular, we take advantage of the decrease in Tg as the alkyl chain length increases for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900945



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