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Author: Nathanael Heckert

Displaying records 1 to 10 of 37 records.
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1. A Design-of-Experiments Approach to FEM Uncertainty Analysis for Optimizing Magnetic Resonance Imaging RF Coil Design
Published: 10/10/2014
Authors: Jeffrey T Fong, Nathanael A Heckert, James J Filliben, Li Ma, Karl F Stupic, Kathryn E Keenan, Stephen E Russek
Abstract: Using the RF module of COMSOL, we compute the magnetic flux density norm (BN) profiles for frequencies in the 76 to 100 MHz range, inside of a prototype birdcage coil, courtesy of Japan's National Institute of Radiological Sciences (NIRS), loaded wit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917201

2. Retrospective Analysis of NIST Standard Reference Material 1450, Fibrous Glass Board, for Thermal Insulation Measurements
Published: 8/25/2014
Authors: Robert R Zarr, Nathanael A Heckert, Stefan D Leigh
Abstract: Thermal conductivity data acquired previously for the establishment of Standard Reference Material (SRM) 1450, Fibrous Glass Board, as well as subsequent renewals 1450a, 1450b, 1450c, and 1450d are re-analyzed collectively and as individual data sets ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915101

3. A New Approach to Finding a Risk-Informed Safety Factor for ,Fail-SafeŠ Pressure Vessel and Piping Design
Published: 8/24/2014
Authors: Jeffrey T Fong, Nathanael A Heckert, James J Filliben, Pedro Vincente Marcal, Stephen W. Freiman
Abstract: The purpose of this paper is to present a new approach to finding a risk-informed safety factor for the "fail-safe" design of a high-consequence engineering system. The new approach is based on the assumption of a 99.99 % confidence level and a 99.9 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916388

4. Analysis of Deamidation Artifacts Induced by Microwave-Assisted Tryptic Digestion of a Monoclonal Antibody
Published: 7/31/2014
Authors: Catherine A Formolo, Nathanael A Heckert, Karen W Phinney
Abstract: The thorough characterization of biopharmaceuticals is essential for ensuring their quality and safety, since many potential variations can cause changes to a drug‰s properties that may be detrimental to the patient. Prior to approval and release, p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914894

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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



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