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Search Publications

NIST Authors in Bold

Displaying 11626 - 11650 of 13225

Baseline assessment of 25-hydroxyvitamin D reference material and proficiency testing/external quality assurance material commutability - a vitamin D standardization program study

August 10, 2017
Author(s)
Karen W. Phinney, Christopher T. Sempos, Hubert W. Vesper, Julianne C. Botelho, M Dasti, Yasamin Rahmani, Susan Tai, Johanna Camara, Stephen A. Wise, Gary L. Myers, Ramon Durazo-Arvizu, Lu Tian, John H. Eckfeldt, Andrew N. Hoofnagle, W. Greg Miller, Lorin M. Bachmann, Ian S. Young, J Pettit, G. Caldwell, A Liu, S P. Brooks, K. Sarafin, M. Thamm, C. Scheidt-Nave, G. B. Mensink, M. Busch, M. Rabenberg, Kevin Cashman, Mairead Kiely, Albert Flynn, Kirsten D. Dowling, B. Quinn, K OH, S. W. Lee, C. L. Jung, L. Cox, G. Goldberg, K. Guberg, S. Meadows, A. Prentice, G. Swan, Alison Tedstone, Schleicher Rosemary, Christine M. Pfeiffer, Graham D. Carter, Julia Jones, P. Brannon, R. M. Lucas, Neil C. Binkley, P. M. Crump, Donald Wiebe, Glenville Jones, J. M. Betz, C. D. Faigen, Joyce Merkel, Elizabeth A. Yetley, Paul M. Coates
… materials for total 25-hydroxyvitamin D [25(OH)D] in human serum, the primary indicator of vitamin D status. A … materials included National Institute of Standards and Technology standard reference material 972a Vitamin D Metabolites in Human Serum as well as study materials from the College of …

The Science Behind Community Resilience Assessment: An Overview of the Center for Risk-Based Community Resilience Planning

August 9, 2017
Author(s)
Bruce Ellingwood, John W. van de Lindt, Therese P. McAllister
… event. The social needs of a community are not reflected in codes, standards and other regulatory documents currently … new approach is nec-essary, one which is interdisciplinary in nature and reflects the complex inter-dependencies among … was established by The National Institute of Standards and Technology to advance the measurement science for …

Performance Monitoring of Chilled Water Distribution Systems using HVAC-Cx

July 30, 2017
Author(s)
Natascha S. Milesi-Ferretti, Michael A. Galler, Steven T. Bushby
… systems. The purpose of the research effort described in this paper is to develop, test and demonstrate an … to detect common mechanical faults and control errors in chilled water loops (chiller loops). This paper presents … developed by the U.S. National Institute of Standards and Technology (NIST). It describes the algorithm used to analyze …

The Lattice Spacing Variability of Intrinsic Float-Zone Silicon

May 11, 2017
Author(s)
Ernest G. Kessler Jr., Csilla Szabo-Foster, James Cline, Albert Henins, Lawrence T. Hudson, Marcus Mendenhall, Mark D. Vaudin
… measurements at the National Institute of Standards and Technology (NIST) provide traceability of x-ray wavelength … been accurately determined by x-ray/optical interferometry in units traceable to the definition of the meter. The crystal that serves as the standard in all the comparisons is WASO 04 whose lattice spacing is …

Structural Characterization of Membrane-Bound Human Immunodeficiency Virus-1 Gag Matrix with Neutron Reflectometry

May 1, 2017
Author(s)
Rebecca Eells, Marilia Barros, Kerry M. Scott, Ioannis Karageorgos, Frank Heinrich, Mathias Loesche
… membrane proteins represents a tremendous challenge in structural biology due to their transient interaction with … is able to adopt different configurations at the membrane in a pH-dependent manner and that the myristate group orients the protein in a way that is a conducive to PIP 2 -binding. …

Characterization of Chemical Properties, Unit Cell Parameters and Particle Size Distribution of Three Zeolite Reference Materials: RM 8850 - Zeolite Y, RM 8851 - Linde Type A Zeolite and RM 8852 - Ammonium ZSM-5 Zeolite

April 4, 2017
Author(s)
Shirley Turner, Robert A. Fletcher, Eric S. Windsor, Jennifer R. Verkouteren, John R. Sieber, Thomas W. Vetter, Rolf L. Zeisler, Anthony F. Marlow, M E. Davis, G J. Kennedy, W S. Borghard, S Yang, A Navrotsky, B H. Toby, James F. Kelly, Stefan D. Leigh
… as catalysts, molecular sieves and ion exchange materials. In this study, three zeolite materials have been … characterized by the National Institute of Standards and Technology (NIST) as Reference Materials (RMs): zeolite Y (RM …

Message from the Editor-in-Chief (EiC): Smart Grid (Wireless Communications)

April 3, 2017
Author(s)
Hamid Gharavi
… deployment of new advanced technologies and smart devices in the next generation electric system, developing a robust … communications between various entities and players in Smart Grid domains will become more challenging. As, … IEEE communication society continues to play a major role in Smart Grid by publishing high quality papers. Therefore, I …

Evaluating the Effects of Modeling Errors for Isolated Finite3-D Targets

March 29, 2017
Author(s)
Mark-Alexander Henn, Bryan Barnes, Hui Zhou
… Our project at the National Institute of Standards and Technology is evaluating how to attain key CD and shape parameters from engineered in-die capable metrology targets. More specifically, the CDs … the actual measurements within acceptable error bounds. As in most applications, establishing a reasonable balance …

First-Principles Effective Hamiltonians for PbZrO 3

February 19, 2017
Author(s)
Eric J. Cockayne
… the physics of PZT at the atomic level would help in designing materials with improved performance and … (AISM) is expected to be very useful for modeling PZT. In AISM, first principles calculations are used both to … transitions and to determine the values of the parameters in the resultant model. We present the development of an …

Development of Laboratory Test Methods for RF-Based Electronic Safety Equipment: Guide to the NFPA 1982 Standard

October 31, 2016
Author(s)
Audrey K. Puls, William F. Young, Kate Remley, Jacob L. Healy, Luis A. Gonzalez
… The National Institute of Standards and Technology (NIST) with support from the Department of … are used to alert a base station when the firefighter is in distress, has been motionless for more than 30 seconds, or to alert the firefighter in case an evacuation is necessary. The material here covers …

Semantification of Identifiers in Mathematics for Better Math Information Retrieval

July 17, 2016
Author(s)
Moritz Schubotz, Alexey Grigoriev, Howard Cohl, Norman Meushke, Bela Gipp, Volker Markl
… Mathematical formulae are essential in science, but face challenges of ambiguity, due to the use … of concepts. Corresponding to word sense disambiguation in Natural Language Processing, we disambiguate mathematical … into the usage of mathematical notations in science, technology, engineering and mathematics. Our gold standard …

Neutron Scattering Studies of Lithium-Ion Diffusion in Ternary Phosphate Glasses

June 30, 2016
Author(s)
Gavin Hester, Tom Heitmann, Madhu Sudan Tyagi, Munesh Rathore, Anshuman Dalvi, Saibal Mitra
… We have studied the diffusion mechanism of lithium ions in glassy oxide-based solid sate electrolytes using elastic … (Li + ) conduction. We find that an increase of Li 2 SO 4 in the compounds to an increase in Li + diffusion until an over-saturation point is reached ( …

Preface (Semiconductor Materials for Solar Photovoltaic Cells)

May 18, 2016
Author(s)
Winnie Wong-Ng, Mariappan Paranthaman, Raghu Bhattacharya
… most comprehensive presentation of the state of the art in the field of solar photovoltaics (PV). The growing field … governmental, industrial, and educational initiatives in the United States, Asia, and Europe to overcome solar grid parity. The technology is particularly intended for increasing the usage …

Hydrogen Field Test Standard: Laboratory and Field Performance

November 10, 2015
Author(s)
Jodie G. Pope, John D. Wright
… The National Institute of Standards and Technology (NIST) developed a prototype field test standard … Temperature (PVT), and 3) master meter. The FTS was tested in NIST’s Transient Flow Facility with helium gas and in the field at a hydrogen dispenser location. All three …

Generalized Probe-Position Compensation Methods for Near-Field Antenna Measurements

October 10, 2015
Author(s)
Michael H. Francis, Ronald C. Wittmann, Josh Gordon, David R. Novotny
… The National Institute of Standards and Technology (NIST) has developed computationally efficient … for probe location and polarization compensation in near- to far-field transformations for use when … frequencies, probe-location compensation techniques allow in principle, the use of less precise and therefore, less …

Altering the Structural Properties of A 2 B 12 H 12 Compounds via Cation and Anion Modifications

October 5, 2015
Author(s)
Wan Si NMN Tang, Terrence J. Udovic, Vitalie Stavila
… recent discovery of unusually high cationic conductivity in Na 2 B 12 H 12 above its entropy-driven, order-disorder … near 529 K and the expected similar conductivity behavior in Li 2 B 12 H 12 above its transition near 615 K have lead … us to investigate modifications of these two materials in an effort to reduce their transition temperatures and thus …

Control experiments to avoid artifacts and misinterpretations in nanoecotoxicology testing

May 22, 2015
Author(s)
Elijah J. Petersen
… This special publication is one in a series stemming from the National Nanotechnology … as one of the essential areas of research needed in order to develop an effective risk assessment and … the environment. The National Institute of Standards and Technology (NIST) was identified as a lead agency in the …

Fracture strength of micro- and nano-scale silicon components

May 13, 2015
Author(s)
Frank W. DelRio, Robert F. Cook, Brad Boyce
… Silicon devices are ubiquitous in many micro- and nano-scale technological applications, … the further advancement of device commercialization. In particular, reliability issues related to the fracture of … become increasingly important given recent escalations in both MEMS device actuation forces and harsh usage …

Enhanced Ordering in Thin Block Copolymer Films Through a Change of Polymer Molecular Mass and the Resultant Thermodynamic Driving Force for Ordering

March 25, 2015
Author(s)
Jack F. Douglas, Xiaohua Zhang, Alamgir Karim
… to the substrate. We also observe a gradual transition in the surface area of our BCP films that have a parallel … work has shown that decreasing the annealing temperature in a lamellae forming PS-PMMA BCP polymer leads to … can enhance both the quality and extent of BCP ordering in thin films. Tuning the polymer mass also allows for a …
Displaying 11626 - 11650 of 13225
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