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Topic Area: Evaluation

Displaying records 1 to 10 of 12 records.
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1. Development of a Precision Nanoindentation Platform
Topic: Evaluation
Published: 7/18/2013
Authors: Douglas T Smith, Bartosz Karol Nowakowski, Robert Francis Cook, Stuart T Smith, Luis F Correa
Abstract: This paper presents the design, construction and performance of a surface- referenced nanoindentation instrument termed a precision nanoindentation platform (PNP). The PNP is a symmetrically designed instrument with a centrally located indenter tip a ...

2. Use of the Grand Canonical Transition-Matrix Monte Carlo Method to Model Gas Adsorption in Porous Materials
Topic: Evaluation
Published: 2/21/2013
Authors: Daniel W Siderius, Vincent K Shen
Abstract: We present grand canonical transition-matrix Monte Carlo (GC-TMMC) as an efficient method for simulating gas adsorption processes, with particular emphasis on subcritical gas adsorption in which capillary phase transitions are present. As in other a ...

3. Discriminating the states of matter in metallic nanoparticle transformations: What are we missing?
Topic: Evaluation
Published: 2/20/2013
Authors: John M Pettibone, Julien C. Gigault, Vincent A Hackley
Abstract: A limiting factor in assessing the risk of current and emerging nanomaterials in biological and environmental systems is the ability to accurately detect and characterize their size, shape and composition in broad distributions and complex media. Asy ...

4. Evaluation of the Current Status of the Combinatorial Approach for the Study of Phase Diagrams
Series: Journal of Research (NIST JRES)
Report Number: 117.018
Topic: Evaluation
Published: 12/21/2012
Author: Winnie K Wong-Ng
Abstract: This paper provides an evaluation of the effectiveness of using the high throughput combinatorial approach for preparing phase diagrams of thin film and bulk materials. Our evaluation is based primarily on examples of combinatorial phase diagrams ...

5. A Practical and Systematic Review of Weibull Statistics for Reporting Strengths of Dental Materials
Topic: Evaluation
Published: 9/11/2009
Authors: Janet Quinn, George David Quinn
Abstract: Objective: To review the history, theory and current applications of Weibull analysis sufficient to make informed decisions regarding practical use of the analysis in dental material strength testing. Data: References are made to examples in the eng ...

6. Comparison of Wavelet Transform and Choi-Williams Distribution to Determine Group Velocities for Different Acoustic Emission Sensors
Topic: Evaluation
Published: 12/31/2008
Author: Marvin Arnold Hamstad
Abstract: Acoustic emission (AE) sources in a plate generate dispersive Lamb waves. In this research, pencil lead breaks (PLBs) were made on an edge of a 3.1 mm thick aluminum alloy plate to generate such AE waves. The PLBs were made near the plate midplane an ...

7. Acoustic Emission Source Location in a Thick Steel Plate Using Lamb Modes
Topic: Evaluation
Published: 1/1/2007
Author: Marvin Arnold Hamstad
Abstract: Using a validated finite-element modeling code, buried out-of-plane (two dimensional code (2D)) and in-plane (three dimensional code (3D)) acoustic emission (AE) dipole point sources were operated at different depths below the top surface of a 25.4 m ...

8. Small Diameter Waveguide for Wideband Acoustic Emission
Topic: Evaluation
Published: 1/1/2006
Author: Marvin Arnold Hamstad
Abstract: The signals obtained from two wideband conical sensors were compared in the time, frequency and the time/frequency domains. The signals were generated by pencil lead-breaks on the surface (out-of-plane) or close to the midplane of the edge (in-plane) ...

9. Practical Aspects of Acoustic Emission Source Location by a Wavelet Transform
Topic: Evaluation
Published: 1/1/2003
Authors: Marvin Arnold Hamstad, K S Downs, Agnes O'Gallagher
Abstract: An algoithmic approach to improve the accuracy of AE source location was demonstrated by using a large database of wideband-acoustic-emission-(AE)-modeled signals and wavelet transform (WT) results. The AE-signal database was created by a three-dime ...

10. Crystallographic Texture in Ceramics and Metals
Series: Journal of Research (NIST JRES)
Topic: Evaluation
Published: 12/1/2001
Author: Mark D Vaudin
Abstract: Preferred crystallographic orientation, or texture, occurs almost universally, both in natural and man-made systems. Many components and devices in electronic and magnetic systems are fabricated from materials that have crystallographic texture. The ...

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