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You searched on: Author: Nathanael Heckert

Displaying records 1 to 10 of 51 records.
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1. Development of Two Fine Particulate Matter Standard Reference Materials (<4 µm and <10 µm) for the Determination of Organic and Inorganic Constituents
Published: 4/13/2016
Authors: Michele Miller Schantz, Danielle Cleveland, Nathanael A Heckert, John R Kucklick, Stefan D Leigh, Stephen E Long, Jennifer M Lynch, Karen E Murphy, Rabia Oflaz, Adam L Pintar, Barbara J. Porter, Savelas A Rabb, Stacy S Vander-Pol, Stephen Albert Wise, Rolf Louis Zeisler
Abstract: Two new Standard Reference Materials (SRMs), SRM 2786 Fine Particulate Matter (< 4 µm) and SRM 2787 Fine Particulate Matter (< 10 µm) have been developed in support of the US Environmental Protection Agency‰s National Ambient Air Quality Standards fo ...

2. The Fiber Break Evolution Process in a 2-D Epoxy/Glass Multi-Fiber Array
Published: 11/2/2015
Authors: Edward D. McCarthy, Jae Hyun Kim, Nathanael A Heckert, Stefan D Leigh, Jeffrey W Gilman, Gale Antrus Holmes
Abstract: The mechanical integrity of a structural composite is strongly affected by the strength and toughness of the fiber-matrix interface/interphase [1], with interfacial shear strength (IFSS) being the accepted quanti-fying metric. However, the value of t ...

3. Development of Urine Standard Reference Materials for Metabolites of Organic Chemicals Including Polycyclic Aromatic Hydrocarbons, Phthalates, Phenols, Parabens, and Volatile Organic Compounds
Published: 4/1/2015
Authors: Michele Miller Schantz, Bruce A Benner Jr, Nathanael A Heckert, Lane C Sander, Katherine E Sharpless, Stacy S Vander-Pol, Stephen Albert Wise
Abstract: Two new Standard Reference Materials (SRMs), SRM 3672 Organic Contaminants in Smokers‰ Urine (Frozen) and SRM 3673 Organic Contaminants in Non-Smokers‰ Urine (Frozen), have been developed in support of studies for assessment of human exposure to sele ...

4. The Testing Program at NIST on Fibers Used in Soft Body Armor Applications
Published: 3/21/2015
Authors: Walter G McDonough, Amanda Lattam Forster, Jae Hyun Kim, Nathanael A Heckert, Joy P Dunkers, Scott A Wight, Gale Antrus Holmes
Abstract: The goal of this paper and presentation is to give an update of the research effort to date being conducted at the National Institute of Standards and Technology (NIST) on polymeric fibers used in soft body armor with a special emphasis on new fibers ...

5. Effect of fiber gripping method on the single fiber tensile test: II. Comparison of fiber gripping materials and loading rates
Published: 12/30/2014
Authors: Jae Hyun Kim, Nathanael A Heckert, Steven P Mates, Jonathan Edward Seppala, Walter G McDonough, Chelsea Simone Davis, Kirk D Rice, Gale Antrus Holmes

6. 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 ...

7. 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 ...

8. 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 ...

9. 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 ...

10. Statistical characterization of single PPTA fiber tensile properties from high strain rate tests
Published: 6/5/2014
Authors: Jae Hyun Kim, Nathanael A Heckert, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes

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  • SP 250-XX: Calibration Services
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