U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 5951 - 5975 of 13218

Flammability Studies of New Cyanate Ester Resins

May 4, 1997
Author(s)
Jeffrey W. Gilman, Richard H. Harris Jr., James E. Brown
… Combustion Calorimeter, show significant differences in flammability of the cured polymers, depending on polymer …

IEEE-P1451.2 Smart Transducer Interface Module

September 11, 1996
Author(s)
Stan Woods, David Rasmussen, Michael Mattes, Kang B. Lee, Norm Lecomte, John Houldsworth, Fernando Gen_kuong, Micahel Geipel, Edwin El-kareh, Steven Cranmer, S Chen, Januz Bryzek
… Applied Sensory Technology Conference …

Phase Transitions of a Polymer Threading a Membrane: Character of the Transition When the Molecule can Undergo a Helix-Random Coil or an Equilibrium Polymerization Transition

January 1, 2003
Author(s)
Edmund A. DiMarzio, John J. Kasianowicz
… phase transition for an isolated linear polymer in the limit of infinite molecular weight is coupled to the … (HRC) transition and to the polymerization (P) transition. In each case an exact expression for the partition function … as we raise the temperature we can have HI->H2->-R1->R2 in obvious notation. The PTM-P mode is most interesting …

Online dashboards for SARS-CoV-2 wastewater data need standard best practices: An environmental health communication agenda

April 17, 2023
Author(s)
Colleen Naughton, Rochelle Holm, Nancy Lin, Brooklyn James, Ted Smith
… data to public health officials and the public. In this study, we review dashboards presenting SARS-CoV-2 … source data. While any single dashboard is likely useful in its own context and locality, the high variation across … presentation conventions, standards, and best practices in this field. …

Calculation of the Mean Radiant Temperature Directly Using Radiant Intensities

February 19, 2017
Author(s)
J M. DeGreef, K S. Chapman
… from the radiant intensity field at a particular point in the room. This approach, using the localized radiant … surface temperatures and view factors currently described in the ASHRAE Handbook (1997). To benchmark the accuracy of … calculation. From the four comparisons presented in this paper, using the radiant intensity field directly for …

Factors Affecting the Service Life of Seams of EPDM Roof Membranes

February 19, 2017
Author(s)
Walter J. Rossiter Jr, Jonathan W. Martin
… A quarter century ago, a revolution occurred in the U.S. low-sloped roofing industry with the introduction … for over two thirds of the total low-sloped roofing market in the United States. One single-ply membrane, EPDM … terpolymer), gained wide acceptance in that it captured about one-third of the total low-sloped …

Surface and Interface Properties of Crosslinked Amine-Cured Epoxies

February 19, 2017
Author(s)
Tinh Nguyen, G Xiaohong, M Giraud, Mark R. VanLandingham, Jonathan W. Martin
… and chemical composition that are different from that in the bulk or at the film/substrate interface. Similarly, … chemical kinetics, diffusion, and volumetric changes. In addition, the interface region often includes … AFM, Building Technology, coatings, crosslink density, epoxy, interface, …

The ACBM/NIST Computer Modelling Workshop: 1990-1998

February 19, 2017
Author(s)
Edward Garboczi
… over the years 1990-1998. This workshop is to train people in the computational materials science of concrete, as developed at NIST under ACBM. To appear in a bi-monthly column about ACBM activities in Concrete International. Also contact information for the …

Introducing Combinatorial Testing in a Large Organization

April 23, 2015
Author(s)
Jon Hagar, Thomas Wissink, D. Richard Kuhn, Raghu N. Kacker
… of eight pilot projects to introduce combinatorial testing in a large aerospace corporation found that the new methods … project management, software assurance, software testing, technology transfer, verification and validation … Introducing Combinatorial Testing in a Large Organization …

Avoiding Accidental Data Loss

October 18, 2013
Author(s)
Richard L. Kissel
… protection, data removal, data sanitation, information technology …

Thermal Properties of High-Volume Fly Ash Mortars and Concretes

January 3, 2011
Author(s)
Dale P. Bentz, Max A. Peltz, Alejandro Duran-Herrera, P Valdez, Cesar Juarez
… placed is receiving renewed interest. Concrete mixtures in which the fly ash replaces 50 % or more of the portland … a bound water heat capacity value employed for the water in the mixture provide reasonable predictions of the measured … Building technology, density, heat capacity, high volume fly ash, …

Mixture Proportioning Options for Improving High Volume Fly Ash Concretes

September 1, 2010
Author(s)
Dale P. Bentz, Chiara F. Ferraris, Max A. Peltz, John A. Winpigler
… cement with fly ash, a significant reduction is achieved in the carbon footprint of the in place concrete. While HVFA mixtures can be proportioned to … early ages, including low early-age strengths, long delays in finishing, and potentially greater susceptibility to …

The Influence of Shrinkage-Reducing Admixtures (SRAs) on Moisture Absorption in Cementitious Materials at Early Ages

March 1, 2010
Author(s)
G Sant, A Eberhardt, Dale P. Bentz, W Weiss
… ingress was monitored using x-ray absorption.  A decrease in both the depth of water penetration and the rate of water … Journal of Materials in Civil Engineering … Building technology, early age, moisture diffusivity, shrinkage … Admixtures (SRAs) on Moisture Absorption in Cementitious Materials at Early Ages …

Limestone Fillers to Conserve Cement in Low w/cm Concretes: An Analysis Based on Powers Model

November 2, 2009
Author(s)
Dale P. Bentz, Edgardo Irassar, Brooks Bucher, Jason Weiss
… since it is typically the most expensive dry ingredient in the concrete mixture proportions and its production is … contributor to carbon dioxide production worldwide. In many low water-to-cement ratio (w/c) concretes, some of … unhydrated due to spatial limitations or deficiencies in water supply. In these concretes, the portion of the …

Verification, Validation, and Variability of Virtual Standards

July 18, 2007
Author(s)
Dale P. Bentz
… standard test methods becomes a viable possibility. In creating these virtual standards, just as with the … all be considered. These three issues will be discussed in reference to the ongoing development of a prototype … to predict the 7-day and 28-day heat of hydration values in comparison to those measured via the ASTM C 186 Heat of …

Curing, Hydration, and Microstructure of Cement Paste

September 13, 2006
Author(s)
Dale P. Bentz, Paul E. Stutzman
… of the percolation state of the capillary pore network in the hydrating samples. The w/c=0.35 specimens cured under … due to self-desiccation and autogenous shrinkage. In the w/c=0.435 specimens, conversely, there is some … building technology, curing, hydration, low temperature calorimetry, …

Capillary Porosity Depercolation/Repercolation in Hydrating Cement Pastes via Low Temperature Calorimetry Measurements and CEMHYD3D Modeling

August 9, 2006
Author(s)
Dale P. Bentz
… The percolation state of the capillary porosity in a hydrating cement paste has a large influence both on … model for cement hydration and microstructure development. In this paper, the two approaches are compared for ordinary … The model and experimental results compare favorably, both in terms of the individual predicted degrees of hydration as …

Dublin Core and the Alternative Interface Access Protocol

August 1, 2004
Author(s)
Charles L. Sheppard, B Laplant, L Nevile
… electronics, environmental controls, and Internet services in a way that is designed to provide users with a single … with the Dublin Core community, advances can be made in the scope and utility of interoperable metadata. … assistive technology, disability access, metadata usage, mobile …

Database-Assisted Design and Structural Reliability for Building Codes

May 1, 2003
Author(s)
S M. Diniz, Emil Simiu
… effects and for knowledge uncertainties. We found that, in contrast to load factor estimates based on the Extreme … effect of terrain roughness uncertainties for buildings in built-up terrain may require an expansion of the … currently available. consideration of uncertainties in isolation, as commonly performed by some wind tunnel …
Displaying 5951 - 5975 of 13218
Was this page helpful?