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Author: Nathanael Heckert

Displaying records 1 to 10 of 32 records.
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1. Single PPTA fiber tensile test under high strain rate
Published: 4/1/2014
Authors: Jae Hyun Kim, Nathanael A Heckert, Steven P Mates, Jonathan Edward Seppala, Chelsea Simone Davis, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915457

2. Analyzing a Co-Polymer Aramid Fiber for Use in Soft Body Armor
Published: 10/25/2013
Authors: Walter G McDonough, Jae Hyun Kim, Nathanael A Heckert, Amanda Lattam Forster, Scott A Wight, Joy P Dunkers, Gale Antrus Holmes
Abstract: Since the well-publicized failure of body armor used by a police officer, it has become imperative that the long-term properties and performance of new fibers being considered for use be understood. The range of interest is from the molecular proper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914414

3. Single PPTA fiber tensile properties from quasi-static and high strain rate tests
Published: 10/23/2013
Authors: Jae Hyun Kim, Nathanael A Heckert, Steven P Mates, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914410

4. Statistical Analysis of Single PPTA Fibers
Published: 7/28/2013
Authors: Nathanael A Heckert, Jae Hyun Kim, Kirk D Rice, Gale Antrus Holmes
Abstract: Discuss statistical methods used for analysis of single fiber tensile strength tests. Kernel density plots and quantile-quantile plots were used to graphically analyze the data. Fiber strength was modeled using 2-parameter Weibull, 3-parameter Weib ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912996

5. Strain rate effect on single PPTA fiber tensile behaviour
Published: 7/28/2013
Authors: Jae Hyun Kim, Nathanael A Heckert, Stefan D Leigh, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913925

6. Single fiber tensile properties measured by the Kolsky bar using Direct fiber clamping method
Published: 6/1/2013
Authors: Jae Hyun Kim, Nathanael A Heckert, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
Abstract: The Kolsky bar test has been widely used in measuring material behavior under high strain rate conditions. In particular, polymers used in ballistic applications have been characterized by this method to investigate high strain rate behaviors during ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913434

7. Single fiber tensile properties measured by the Kolsky bar using a direct fiber clamping method
Published: 6/1/2013
Authors: Jae Hyun Kim, Nathanael A Heckert, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914325

8. An Interlaboratory Investigation of the Effect of Material Granularity and Sample Processing on Measurement Variability: Nutritional Elements in Cereals
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7927
Published: 5/9/2013
Authors: Katrice A Lippa, Laura J Wood, Stefan D Leigh, Nathanael A Heckert
Abstract: This interlaboratory study was uniquely designed to determine the effects of material granularity and sample processing techniques on the measurement variability (i.e. precision) of nutritional elements in various cereal materials. Participants w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911835

9. Effects of fiber gripping methods on the single fiber tensile test: I. Non parametric statistical analysis
Published: 2/15/2013
Authors: Jae Hyun Kim, Nathanael A Heckert, Stefan D Leigh, Haruki Kobayashi, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
Abstract: Single fiber tensile tests using two different gripping methods were carried out on various fiber lengths. One method (the glue-tab grip) consists of mounting a fiber onto a rigid tab as specified in ASTM C1557-03 using an adhesive, while the other ( ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910750

10. Breakfast Cereal Sampling Study for Nutritional Elements
Published: 2/5/2013
Authors: Laura J Wood, Katrice A Lippa, Melissa Meaney Phillips, Catherine A Rimmer, Nathanael A Heckert, Stefan D Leigh, Amanda J Moors, Rebecca S Pugh
Abstract: The National Institute of Standards and Technology (NIST) has established a Dietary Supplement Laboratory Quality Assurance Program (DSQAP) in collaboration with the National Institutes of Health Office of Dietary Supplements (NIH-ODS). The DSQAP de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912364



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