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Blaza Toman (Fed)

Blaza Toman was born in Prague, Czechoslovakia and became a naturalized U.S. citizen in 1975. She studied Mathematics and Statistics, earning a Ph.D. in Statistics from the Ohio State University in 1987 with a specialization in Bayesian Optimal Design. She taught statistics at the graduate and undergraduate level at Rutgers University and at the George Washington University, and was a consultant to several medical device companies on Bayesian clinical trial design and analysis. She became a member of the Statistical Engineering Division at NIST in 2000. Her main research interests remain Bayesian statistical methods.

At NIST, she became interested in uncertainty assessment for measurements in the physical sciences, and more generally in statistical methods relevant to metrology. Here she collaborates with scientists in many fields, for example: in the Engineering Laboratory, analyzing data from fire models and virtual cement models; in the Materials Measurement Laboratory, analyzing gas chromatography and mass spectrometry data; and in the Physical Measurement Laboratory, analyzing data on spectral responsivity of photodiodes. She also collaborates with her colleagues in the Statistical Engineering Division to develop statistical methods for interlaboratory studies and key comparisons, and for uncertainty analysis of measurements resulting from complex systems.

Technical Areas of Research and Consulting:

  • Uncertainty Analysis
  • Experiment design (in particular, Bayesian optimal experimental design)
  • Bayesian statistical analysis


W. J. Youden Award in Interlaboratory Testing, the American Statistical Association, 2009.

Silver Medal, Department of Commerce, 2011, for participation in the response to the Deepwater Horizon oil spill.

Silver Medal, Department of Commerce, 2016, for work related to the Fire Dynamics Simulator (FDS) for fire modeling.

Bronze Medal, Department of Commerce, 2018, for development of rigorous analytical methods and data-evaluation processes for the determination of chemical purity.

Bronze Medal, Department of Commerce, 2019, for development and implementation of a measurement assurance strategy to improve comparability and reliability of cell-based assays.


A Reference High-Pressure CH4 Adsorption Isotherm for Zeolite Y: Results of an Interlaboratory Study

Huong Giang T. Nguyen, Christopher M. Sims, Blaza Toman, Jarod C. Horn, Roger D. van Zee, Mathias Thommes, Riaz Ahmad, Joeri F. Denayer, Gino V. Baron, Emilio Napolitano, Marek Bielewski, Enzo Mangano, Stefano Brandani, Broom Darren, M.J. Benham, Anne Dailly, Frieder Dreisbach, Satyannarayana Edubilli, Sasidhar Gumma, Jens Mollmer, Marcus Lange, Mi Tian, Tim Mays, T. Shigeoka, S. Yamakita, M. Hakuman, Y. Nakada, K. Nakai, Junyoung Hwang, Ronny Pini, Huan Jiang, Armin Ebner, Marjorie Nicholson, James Ritter, Judit Farrando Perez, Carlos Cuadrado, Joaquin Silvestre Albero, Christos Tampaxis, Theodore Steriotis, Daniela Rimnacova, Martina Svabova, Maryna Vorokhta, Hai Wang, Eric Bovens, Nicolas Heymans, Guy de Weireld
This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of

Metrological Tools for the Reference Materials and Reference Instruments of the NIST Material Measurement Laboratory

Carlos R. Beauchamp, Johanna Camara, Jennifer Carney, Steven J. Choquette, Kenneth D. Cole, Paul C. DeRose, David L. Duewer, Michael S. Epstein, Margaret C. Kline, Katrice A. Lippa, Enrico Lucon, Karen W. Phinney, Maria Polakoski, Antonio M. Possolo, Katherine E. Sharpless, John R. Sieber, Blaza Toman, Michael R. Winchester, Donald A. Windover
The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, was established by the U.S. Congress in 1901 and charged

Determining what really counts: Modeling and measuring nanoparticle number concentrations

Elijah J. Petersen, Antonio R. Montoro Bustos, Blaza Toman, Monique E. Johnson, Mark Ellefson, George C. Caceres, Anna Lena Neuer, Qilin Chan, Jonathan Kemling, Brian Mader, Karen E. Murphy, Matthias Roesslein
Elijah J. Petersen, Antonio Montoro Bustos, Blaza Toman, Monique Johnson, Mark Ellefson, George C. Caceres, Anna Lena Neuer, Qilin Chan, Jonathan Kemling, Brian
Created October 9, 2019, Updated June 15, 2021