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Displaying 4276 - 4300 of 13217

Effect of the Interfacial Transition Zone on the Conductivity of Portland Cement Mortars

May 1, 2000
Author(s)
J D. Shane, T Mason, D A. Jennings, Edward Garboczi, Dale P. Bentz
… by a micrometer-scale microstructural model, and were used in conjunction with random-walk algorithms and differential … of the mortar. However, there were significant differences in conductivity between the transition zone and matrix pastes … Building Technology, electrical conductivity, interfacial transition …

Impedance Spectra of Fiber-Reinforced Cement-Based Composites: A Modeling Approach

April 1, 2000
Author(s)
J M. Torrents, T Mason, Edward Garboczi
… (physical simulations) consisting of conducting needles in aqueous solutions. Two discrete bulk arcs are observed in the Nyquist plots for fiber-reinforced samples, while only … so that the fibers act as highly conducting elements in the mocrostructure. Spreading resistance effects from the …

Polymer Composites for Repairing of Portland Cement Concrete: Compatibility Project

November 1, 1999
Author(s)
L Czarnecki, A Garbacz, P Lukowski, J R. Clifton
… two-component system, portland cement concrete (substrate) in contact with a polymer composite (repair) is produced as … by new materials. Results of the project are presented in this report and in the Compatibility Computer System (CCS), whose User's … Building Technology, compatibility, concrete, polymer composite, …

Elastic Properties of a Tungsten-Silver Composite by Reconstruction and Computation

September 1, 1999
Author(s)
A P. Roberts, Edward Garboczi
… The effective Young's modulus (E) of the model is computed in the temperature range 25-1060 C using a finite element method. The results are in good agreement with experimental data. The reconstructed … media. The computed moduli of the models are not generally in good agreement with the predictions of the self-consistent …

Modified Slump Test to Measure Rheological Parameters of Fresh Concrete

December 1, 1998
Author(s)
Chiara F. Ferraris, F DeLarrard
… the time necessary for the upper surface of the concrete in the standard slump cone to slump 100 mm was measured. The … 120 to 260 mm. If the validity of this test is confirmed in the future, it could be used as a field quality control … building technology, field test, fresh concrete, rheology, slump …

Evaluation of the External Force Term in the Discrete Boltzmann Equation

November 1, 1998
Author(s)
Nicos Martys, X Shan, H Chen
… A representation of the forcing term in the Boltzmann equation based on Hermite expansion of the Boltzmann distribution function in velocity phase space is derived. Based on this description … Boltzmann equation, building technology, complex fluids, Hermite polynomials …

The Use of Computer Simulations to Interpret and Understand Electrical Measurements

December 1, 1997
Author(s)
Edward J. Garboczi
… It is very rare to obtain complete 3-D information in the form of images of the microstructure of a material. … via some kind of micrograph, or is not available at all. In the case of incomplete microstructural information, … Building technology, computer simulation, electrical properties, …

The Optimal Pricing of Publicly Supplied Private Goods: A Case Study of NIST Standard Reference Materials

June 1, 1999
Author(s)
S Fuller, J J. Cordes
… first-best, profit-maximizing rules lead to deficits. In order to cover costs, prices therefore need to exceed … goods by firms and laboratories who use them to calibrate manufacturing equipment or scientific apparatus for quality … Program (SRMP) at the National Institute of Standards and Technology (NIST). The NIST SRMP supplies samplesof materials …

INFORMATION MODEL FOR A-UGV PERFORMANCE MEASUREMENT STANDARD

November 19, 2020
Author(s)
Soocheol Yoon, Roger V. Bostelman
… have the potential to be applied over a wide range of manufacturing systems under industry 4.0 paradigm. In order to use A-UGVs efficiently in a manufacturing system, it is necessary to select the …

Fracture Mechanics Approach to Splitting in Low Spring Index Cold Coiling Process

June 1, 2019
Author(s)
Y. Prawoto, S. Manville, T. Sakai, L. Lee, M. Tanaka, Thomas H. Gnaupel-Herold
… Comparing coil springs manufactured at two different manufacturing lines, namely N1 and N6, residual stress distributions in three main directions were measured using neutron … to the stress intensity factor to enable the analysis in fracture mechanics. The mixed mode analysis of opening, …

Impact of BTI on Random Logic Circuit Critical Timing

October 31, 2014
Author(s)
Kin P. Cheung, Jiwu Lu, Guangfan Jiao, Jason P. Campbell, Jason T. Ryan
… reliability issue for state-of-the-art Silicon MOSFET technology [1-6]. It is well-known that in addition to a “permanent” degradation, there is a large … treated as a source for lifetime extension [1-6, 8-12]. In other words, the recovery buys margin in measured …
Displaying 4276 - 4300 of 13217
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