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41. Flexible retrospective phase stepping in x-ray scatter correction and phase contrast imaging using structured illumination
Topic: Chemistry
Published: 10/31/2013
Authors: Han Wen, Houxun Miao, Eric E Bennett, Nicholas M Adamo, Lei Chen
Abstract: An efficient class of x-ray phase contrast imaging and scatter correction methods share the idea of using structured illumination in the form of a periodic fringe pattern created with gratings or grids. They measure the scatter and distortion of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914678

42. Fluctuation Enhanced Sensing (FES) with a Nanostructured Semiconducting Metal Oxide Film for Gas Detection and Classification
Topic: Chemistry
Published: 10/31/2013
Authors: Bulent Ayhan, Chiman Kwan, Jin Zhou, Laszlo Kish, Kurt D Benkstein, Phillip H. Rogers, Stephen Semancik
Abstract: The feasibility of fluctuation-enhanced sensing (FES) for the detection and classification of different gases by using a single microsensor has been experimentally demonstrated. A nanostructured semiconducting metal oxide film has been used as a chem ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912530

43. Enhancing the Performance of High Volume Fly Ash Concretes Using Fine Limestone Powder
Topic: Chemistry
Published: 10/29/2013
Authors: Jussara Tanesi, Dale P Bentz, Ahmad Ardani
Abstract: One of the primary approaches being explored to produce more sustainable concretes consists of replacing a significant portion of the portland cement with industrial by-products. In high volume fly ash (HVFA) concretes, for example, the nominal goal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912432

44. Connection between thermodynamics and dynamics of simple fluids in highly attractive pores
Topic: Chemistry
Published: 10/25/2013
Authors: William P Krekelberg, Vincent K Shen, Daniel W Siderius, Thomas M. Truskett, Jeffrey R. Errington
Abstract: We investigate the structural and diffusive dynamics properties of a model fluid in highly-absorptive cylindrical pores. At subcritical temperatures, self diffusion displays three distinct regimes as a function of average pore density ρ: 1) a de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914566

45. The Seventh Industrial Fluid Properties Simulation Challenge
Topic: Chemistry
Published: 10/8/2013
Authors: Riaz Ahmad, John K. Brennan, Kevin A Frankel, Jonathan D Moore, Joshua D Moore, Raymond Dale Mountain, Richard Ross, Vincent K Shen, Nathan E Schultz, Daniel W Siderius, Kenneth D Smith, Matthias Thommes
Abstract: The primary goal of the seventy industrial fluid properties simulation challenge was to test the ability of molecular simulation methods to predict the adsorption of organic adsorbates in zeolite materials. Zeoliet adsorbents are used in a variety o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913980

46. Fluid Transport in High-Volume Fly Ash Mixtures with and without Internal Curing
Topic: Chemistry
Published: 10/7/2013
Authors: Igor de la Varga, Robert Spragg, Carmelo di Bella, Javier Castro, Dale P Bentz, Jason Weiss
Abstract: The transport of fluid and ions in concrete mixtures is central to many aspects of concrete deterioration. As a result, transport properties are frequently measured as an indication of the durability that a concrete mixture may be expected to have. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913751

47. A note on the critical enhancement of transport properties and correlation length of fluids
Topic: Chemistry
Published: 10/6/2013
Authors: Richard A Perkins, Jan Vincent Sengers
Abstract: The thermal conductivity and viscosity are known to exhibit an enhancement in fluids due to critical fluctuations. We have reviewed procedures proposed in the literature for estimating the correlation length determining the magnitude of these enhance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914060

48. Influence of Sample Curing Conditions on Internal Curing Benefits Seen in Cementitious Materials
Topic: Chemistry
Published: 9/27/2013
Authors: Michael Golias, Dale P Bentz, Jason Weiss
Abstract: Internal curing uses pre-wetted fine lightweight aggregate (LWA) to supply cementitious systems with water. This increases the hydration of cement and reduces the influence of self-desiccation resulting in concrete with increased compressive strength ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909748

49. Best Practices Guide for High-Volume Fly Ash Concretes: Assuring Properties and Performance
Series: Technical Note (NIST TN)
Report Number: 1812
Topic: Chemistry
Published: 9/18/2013
Authors: Dale P Bentz, Chiara F Ferraris, Kenneth Alan Snyder
Abstract: A best practices guide is developed from a synthesis of recent research on high-volume fly ash (HVFA) concrete mixtures. These best practices can be applied by the concrete construction industry to achieve desired properties and ensure the (high) per ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914225

50. Viscosity Modifiers to Enhance Early Age Performance and Long Term Durability of Concrete
Topic: Chemistry
Published: 9/1/2013
Authors: Dale P Bentz, Kenneth Alan Snyder, Max A Peltz, K H Obla, Haejin Kim
Abstract: The service life distribution of concrete structures typically follows a ,bathtubŠ-shaped function, with a finite probability of early-age failures being followed by a life with a relative low probability of failure that ultimately increases dramatic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909952



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