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Search Publications

NIST Authors in Bold

Displaying 5001 - 5025 of 13218

Estimates of Extreme Wind Effects and Wind Load Factors: Influence of Knowledge Uncertainties

October 1, 2001
Author(s)
F Minciarelli, M Gioffre, Mircea Grigoriu, Emil Simiu
… methodology for developing improved load factors in standard provisions for wind loads, and use it to examine: the cause of the discrepancy noted in the 1980s between estimates of safety indices for wind and … estimates of safety indices for gravity and wind loads in an artifact that can be removed by using current knowledge …

Shrinkage-Reducing Admixtures and Early-Age Desiccation in Cement Pastes and Mortars

July 1, 2001
Author(s)
M R. Geiker, K K. Hansen
… although the SRA accelerates the drying of bulk solutions, in cement paste with a water-to-cement ratio of 0.35, it … model, an explanation for this observation is proposed. In sealed systems, at equivalent hydration times, the SRA … to low w/c ratio concretes undergoing self-desiccation, in addition to their normal usage to reduce drying shrinkage. …

Slab Effects in SMRF Retrofit Connection Tests

March 1, 2001
Author(s)
S A. Civjan, M D. Engelhardt, John L. Gross
… beam capacity overestimated the specimen strengths in positive moment. Shear stud failures were observed, … building technology, connections, design, earthquake engineering, … Slab Effects in SMRF Retrofit Connection Tests …

Characterization of Coating System Interphases with Phase Imaging AFM

February 1, 2001
Author(s)
Tinh Nguyen, Xiaohong Gu, Mark R. VanLandingham, M Giraud, R Dutruc-Rosset, R Ryntz, D Nguyen
… diffusion, volumetric changes, and internal stress. In addition, the interphase often includes impurities, … be a very complex structure, which is not easily analyzed. In this study, phase imaging atomic force microscopy (AFM) is … Crossed sections and interior surfaces (surfaces in contact with the substrates) are used for interphase …

Input Data for Multizone Airflow and IAQ Analysis

January 1, 2001
Author(s)
Andrew K. Persily, E M. Ivy
… and contaminant dispersal models requires a range of data. In terms of airflow analysis, these data include leakage … such data can be a major part of an analysis effort. In order to facilitate the use of multizone modeling … has been developed. These data are not comprehensive in terms of the needs of any given user, but they do contain …

Dimensional Analysis of Ionic Transport Problems in Hydrated Cement Systems - Part 1: Theoretical Considerations

December 1, 2000
Author(s)
R Barbarulo, J Marchand, Kenneth A. Snyder, S Prene
… The validity of the local equilibrium assumption in hydrated cement systems, that a particular chemical … using a dimensional analysis of electrochemical transport in cementitious materials. The transport equation parameters are scaled, resulting in a dimensionless equation. The dimensionless coefficient …

Chaotic Resonance, Hopping Rates, Spectra and Signal-to-Noise Ratios

January 1, 2000
Author(s)
A Kovaleva, Emil Simiu
… on the other. As an example, chaotic resonance in theHolmes-Brunsden oscillator is studied. … Building technology, chaotic resonance, hopping rates, signal-to-noise … Stochastic and Chaotic Dynamics in the Lakes: STOCHAOS | | | AIP …

Model of Fatigue Damage in Strain Rate-Sensitive Composite Materials

January 1, 2000
Author(s)
S K. Lee, Tinh Nguyen, Tze J. Chuang
… model has been performed using experimental data obtained in the literature. Both factors are found to enhance fatigue … Building technology, fatigue, model, polymer composite, strain … Model of Fatigue Damage in Strain Rate-Sensitive Composite Materials …

Finned-Tube Evaporator Model With a Visual Interface

September 19, 1999
Author(s)
Piotr A. Domanski
… obtained based on the simulated performance of each tube in the evaporator assembly using inlet parameters and mass … air conditioning, building technology, evaporator, heat exchanger, refrigeration, …

Chemistry and Structure of Hydration Products

August 1, 1999
Author(s)
Paul E. Stutzman
… This chapter covers papers published and abstracted in 1996 relating to cement hydration and the chemistry and … building materials, building technology, cement, cement hydration, hydration products …

Cement Hydration in the Presence of Municipal Solid Waste Incineration of Fly Ash

March 1, 1998
Author(s)
S J. Remond, Dale P. Bentz, M. Pimpinella, J P. Bournazel
… characteristics, environmental impact and durability. In this paper, we describe the experimental work undertaken to study the hydration of cement mixes in the presence of MSWIFA. The physical and chemical … observations were performed. The hydration products formed in a cement paste in the presence of MSWIFA were also …

Concrete: A Multi-Scale Interactive Composite

March 1, 1998
Author(s)
Edward J. Garboczi, Dale P. Bentz
… for predicting the overall diffusion coefficient of ions in concrete using a multi-scale interactive analysis, … interactive composite. The multi-scale analysis presented in this paper can quantitatively take this interaction of … into account when modelling the properties of concrete in terms of its microstructure. The analysis predicts that …

Testing and Modeling of Fresh Concrete Rheology

February 1, 1998
Author(s)
Chiara F. Ferraris, F DeLarrard
… described. The results of this test for all mixtures used in the program were analyzed. Semi-empirical models are … building technology, field test, fresh concrete, modelling, rheology, …

Standardization and Enterprise Integration

January 1, 1997
Author(s)
Jim G. Nell
… perhaps, enterprise-integration-related standards are in a category different from the usual standards for … and even interacting enterprises, they are more in the category of horizontal standards such as quality and … enterprise integration, horizontal standards, information technology, standards, strategic standardization …

Effects of Elevated Temperature Exposure on Heating Characteristics, Spalling, and Residual Properties of High Performance Concrete

March 1, 2001
Author(s)
Long T. Phan, James R. Lawson, Frank L. Davis
… being conducted at the National Institute of Standards and Technology (NIST) to study effects of elevated temperature … of the heating characteristics and spalling mechanism in HPC, and to quantify the potential for spalling and the changes in HPC's material properties as a result of high temperature …

Heating, Spalling Characteristics and Residual Properties of High Performance Concrete

March 1, 2000
Author(s)
Long T. Phan, James R. Lawson, Frank L. Davis
… being conducted at the National Institute of Standards and Technology (NIST) to study effects of elevated temperature … of the heating characteristics and spalling mechanism in HPC, and to quantify the potential for spalling and the changes in HPC's material properties as a result of high temperature …

A comprehensive evaluation of an outdoor vehicular test range

July 4, 2005
Author(s)
Robert T. Johnk, David R. Novotny, Chriss A. Grosvenor, Seturnino Canales, Janalee A. Graham, Louis L. Nagy, Doug Martin, Scott Yencer, Donald Hibbard, Tyrone L. Roach
This paper summarizes a joint industry/govenment effort to eveluate a large outdoor automotive antenna test range owned by a large automotive manufacturer.

IMPLEMENTATION OF AN ONTOLOGY-BASED APPROACH TO ENABLE AGILITY IN KIT BUILDING APPLICATIONS

December 14, 2018
Author(s)
Zeid Kootbally, Thomas Kramer, Craig I. Schlenoff, Satyandra K. Gupta
… The effort described in this paper attempts to integrate agility aspects in the "Agility Performance of Robotic Systems" (APRS) … developed at the National Institute of Standards and Technology (NIST). The technical idea for the APRS project is … OF AN ONTOLOGY-BASED APPROACH TO ENABLE AGILITY IN KIT BUILDING APPLICATIONS …

Improving Automated Insertion Applications by Restoring Rigid-Body Condition in Point-Based Registration

March 19, 2018
Author(s)
Geraldine S. Cheok, Marek Franaszek, Karl Van Wyk, Jeremy A. Marvel
… Accurate knowledge of an object's location is essential in automated robotic applications such as machine tending, … relative to the coordinate frame of the robot. In manufacturing applications that involve industrial robots, a … Researchers at the National Institute of Standards and Technology (NIST) have developed a method to improve this …
Displaying 5001 - 5025 of 13218
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