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Author: nathanael heckert

Displaying records 21 to 30 of 32 records.
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21. A Web-Based Data Analysis Methodology for Estimating Reliability of Weld Flaw Detection, Location, and Sizing
Published: 7/27/2008
Authors: Jeffrey T Fong, Owen F Hedden, James J Filliben, Nathanael A Heckert
Abstract: Recent advances in computer technology, intemet communication networks, and fmite element modeling and analysis capability have made it feasible for engineers to accelerate the feedback loop between the field inspectors of a structure or component fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152099

22. Robust Engineering Design for Failure Prevention
Published: 7/27/2008
Authors: Jeffrey T Fong, James J Filliben, Nathanael A Heckert, Roland deWit, Barry Bernstein
Abstract: To advance the state of the art of engineering design, we introduce a new concept on the "robustness" of a structure by measuring its ability to sustain a sudden loss of a part without causing an immediate collapse.  The concept is bas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152089

23. Uncertainty Estimate of Charpy Data Using a 5-factor 8-run Design of Experiments
Published: 7/27/2008
Authors: Charles G. Interrante, Jeffrey T Fong, James J Filliben, Nathanael A Heckert
Abstract: Scatter in laboratory data with duplicates on Charpy impact tests is analyzed by identifying several sources of variability such as temperature, manganese sulfide, initial strain, mis-orientation, and notch radius in order to estimate the predictive ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152114

24. Design of Experiments Approach to Verification and Uncertainty Estimation of Simulations based on Finite Element Method
Published: 6/11/2008
Authors: Jeffrey T Fong, James J Filliben, Nathanael A Heckert, Roland deWit
Abstract: A fundamental mathematical modeling and computational tool in engineering and applied sciences is the finite element method (FEM).  The formulation of every such problem begins with the building of a mathematical model with carefully chosen simp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150675

25. Relationship between dispersion metric and properties of PMMA/SWNT nanocomposites
Published: 6/13/2007
Authors: Takashi Kashiwagi, Jeffrey A Fagan, Jack F Douglas, Kazuya Yamamoto, Nathanael A Heckert, Stefan D Leigh, Jan Obrzut, Fangming Du, Minfang Mu, Sheng Lin-Gibson, K Winey, R Haggenmueller
Abstract: Particle spatial dispersion is a crucial characteristic of polymer composite materials and this property is recognized as especially important innanocomposite materials due to the general tendency of nanoparticles to aggregate under processing condit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854038

26. NIST/SEMATECH e-Handbook of Statistical Methods; Chapter 1: Exploratory Data Analysis
Published: 6/1/2003
Authors: Nathanael A Heckert, James J Filliben
Abstract: This chapter presents an approach/philosophy for data analysis which employs a variety of techniques (mostly graphical) to: maximize insight into a data set; uncover underlying structure; detect outliers and anomalies; test underlying assumptions; an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151768

27. Handbook 151: NIST/SEMATECH e-Handbook of Statistical Methods
Series: NIST Interagency/Internal Report (NISTIR)
Published: 11/1/2002
Authors: Nathanael A Heckert, James J Filliben, C M. Croarkin, B Hembree, William F Guthrie, P Tobias, J Prinz
Abstract: The URL is http://www.itl.nist.gov/div898/handbook/mpc/mpc.htm. This is a web based guide to statistical methods for engineering. It involves case studies with interactive software for analysis.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50798

28. Transformation, Ranking, and Clustering for Face Recognition Algorithm Comparison
Published: 3/1/2002
Authors: Stefan D Leigh, Nathanael A Heckert, Andrew L Rukhin, J Grother Phillips, Elaine M Newton, M Moody, K Kniskern, S Heath
Abstract: The performance of face recognition algorithms is recently of increased interest, although to date empirical analyses of algorithms have been limited to rank-based scores such a cumulative match score and receiver operating characteristic. This pap ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51043

29. Dependence Characteristics of Face Recognition Algorithms
Published: 1/1/2002
Authors: Andrew L Rukhin, Patrick J Grother, P Jonathon Phillips, Stefan D Leigh, E M Newton, Nathanael A Heckert
Abstract: Nonparametric statistics for quantifying dependence between the output rankings of face recognition algorithms are described. Analysis of the archived results of a large face recognition study shows that even the better algorithms exhibit significan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51048

30. Transformation, Ranking, and Clustering for Face Recognition Algorithm Performance
Published: 1/1/2002
Authors: Stefan D Leigh, Nathanael A Heckert, Andrew L Rukhin, P Jonathon Phillips, Patrick J Grother, E M Newton, M Moody, K Kniskern, S Heath
Abstract: The performance of face recognition algorithms is recently of increased interest, although to date empirical analyses of algorithms have been limited to rank-based scores such a cumulative match score and receiver operating characteristic. This pape ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151783



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