U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 16651 - 16675 of 74220

International R&D Roadmap for Fire Resistance of Structures Summary of NIST/CIB Workshop

June 11, 2015
Author(s)
Jiann C. Yang, Matthew F. Bundy, John L. Gross, Anthony P. Hamins, Fahim Sadek, Anand Raghunathan
This report summarizes the results of the global meeting to develop the International R&D Roadmap for Fire Resistance of Structures (the Roadmap) held May 21–22, 2014, in Gaithersburg, Maryland. The workshop was sponsored by the National Institute of

Modeling Particle Resuspension for Estimating Exposure to Bacillus Spores

June 11, 2015
Author(s)
William S. Dols, Andrew K. Persily
A key challenge in assessing the risks of low level contaminations following biological threat agent releases, and subsequent decontamination, is developing an understanding of and addressing the potential for airborne resuspension of agents that have

On the 209Po Half-Life Error and Its Confirmation: A Critique

June 11, 2015
Author(s)
Ronald Colle, Arthur M. Colle
Collé, et al [(2007) Appl. Radiat Isot. 65, 728; (2014) J. Phys. G: Nucl. Part. Phys. 41, 105103], over the course of nearly a decade and with decay data from a period of 20.7 years, initially uncovered and then substantiated a 25 % error in the 209Po half

Recent measurements of the gravitational constant as a function of time

June 11, 2015
Author(s)
Stephan Schlamminger, Jens H. Gundlach, Riley D. Newman
A recent publication (J.D. Anderson et. Al., EPL 110, 1002) found a strong correlation between the measured values of the gravitational constant G and the 5.9-year oscillation of the length of day. Here, we provide a compilation of all published

Research Roadmap for Smart Fire Fighting

June 11, 2015
Author(s)
Anthony P. Hamins, casey grant, Nelson P. Bryner, Albert W. Jones, Galen H. Koepke
In 2013, fire departments in the United States responded to more than 480,000 structure fires. These fires resulted in approximately 2850 civilian fatalities, 14,000 injuries, and estimated property losses of $10 billion dollars. More than 30,000 fire

Thermoresponsive PNIPAM Coatings on Nanostructured Gratings for Cell Alignment and Release

June 10, 2015
Author(s)
Mikhail Zhernenkov, Rana N. Ashkar, Hao Feng, Olukemi O. Akintewe, Nathan D. Gallant, Ryan Toomey, John F. Ankner, Roger Pynn
Thermoresponsive poly(N-isopropylacrylamide) (NIPAAm) has been widely used as a surface coating to thermally control the detachment of adsorbed cells without the need for extreme stimuli such as enzyme treatment. In this context, cell adhesion to 2D and 3D

Amplitude and phase-resolved nano-spectral imaging of surface phonon polaritons in hexagonal boron nitride

June 9, 2015
Author(s)
Samuel Berweger, Shi Zhiwen, Hans A. Bechtel, Sun Yinghui, Zeng Bo, Jin Chenhao, Chang Henry, Michael C. Martin, Markus B. Raschke, Feng Wang
Phonon polaritons are quasiparticles resulting from strong coupling of photons with optical phonons. Excitation and control of these quasiparticles in 2D materials offer the opportunity to confine and transport light at the nanoscale. Here, we image the

Application of the Hartmann-Tran profile to analysis of H2O spectra

June 9, 2015
Author(s)
D Lisak, A. Cygan, D Bermejo, J L. Domenech, Joseph T. Hodges, Ha Tran
The Hartmann-Tran profile (HTP), which has been recently recommended as a new standard in spectroscopic databases, is used to analyze spectra of several lines of H$_2$O diluted in N$_2$, SF$_6$, and in pure H$_2$O. This profile accounts for various

Chlorine - Bromine Combination Isotope Intensities

June 9, 2015
Author(s)
Thomas J. Bruno
Due to the distinctive mass spectral patterns caused by the presence of chlorine and bromine in a molecule, interpretation of a mass spectrum can be much easier if the results of the relative isotopic concentrations are known. The following table provides

Gas Chromatographic Retention Indices

June 9, 2015
Author(s)
Thomas J. Bruno
The interpretation of results from chromatographic measurements can often be augmented with an appropriate mathematical treatment of the solute retention that is observed. The goal of treatment is to make the resulting metric as independent of the

Instability of HPLC Solvents

June 9, 2015
Author(s)
Thomas J. Bruno
Solvents that are commonly used in high performance liquid chromatography frequently have inherent chemical instabilities that must be considered when designing an analysis, or in the interpretation of results [1-4] . In many cases, such solvents are

Neutron Spin Resonance as a Probe of Superconducting Gap Anisotropy in Partially Detwinned Electron Underdoped NaFe 0.985Co d0.015^As

June 9, 2015
Author(s)
Chenglin Zhang, J. T. Park, Xingye Lu, Rong Yu, Yu Li, Wenliang Zhang, Yang Zhao, Jeffrey W. Lynn, Qimiao Si, Pengcheng Dai
We use inelastic neutron scattering (INS) to study spin excitations in detwinned NaFe 0.985Cod0.015^As which has coexisting static antiferromagnetic (AF) order and superconductivity (T c=15 K, T N = 30 K). In previous INS work on twinned sample, spin

Relative Dose Ranges From Ionizing Radiation

June 9, 2015
Author(s)
Thomas J. Bruno
It is important to place in perspective the relative ionizing radiation dose acquired in common laboratory settings. The most commonly encountered source is a 63Ni source used in gas chromatographic electron captures detectors and in ion mobility

Rheology and Dynamics of Colloidal Superballs

June 9, 2015
Author(s)
John R. Royer, George L. Burton, Daniel L. Blair, Steven D Hudson
Recent advances in colloidal synthesis make it possible to generate a wide array of precisely controlled, non-spherical, shaped particles. However, relatively little is known about the role that particle shape plays in the dynamics of colloidal suspensions

Spectroscopic Determination of the Atomic f-Electron Symmetry Underlying Hidden Order in URu 2 Si 2

June 9, 2015
Author(s)
L. Andrew Wray, Jonathan Denlinger, Shih-Wen Huang, Haowei He, Nicholas Butch, M. Brian Maple, Zahid Hussain, Yi-De Chuang
The hidden order state of URu6d2^Si 2 has been a subject of intense speculation for more than 25 years, but there is still no clear consensus on what degrees of freedom are important for a low temperature physical model. Here, X-ray absorption spectroscopy

A Fast Algorithm for Elastic Shape Distances Between Closed Planar Curves

June 8, 2015
Author(s)
Gunay Dogan, Javier Bernal, Robert C. Hagwood
Effective computational tools for shape analysis are needed in many areas of science and engineering. We address this and propose a fast algorithm to compute the geodesic distance between elastic closed curves in the plane. The original algorithm for the

A Generalized Data-Driven Energy Prediction Model with Uncertainty for a Milling Machine Tool using Gaussian Process

June 8, 2015
Author(s)
Jinkyoo Park, Raunak Bhinge, Nishant Biswas, Amrita Srinivasan, Kincho H. Law, David Dornfeld, Moneer Helu, Sudarsan Rachuri
Using a machine learning approach, this study investigates the effects of machining parameters on the energy consumption of a milling machine tool, which would allow selection of optimal operational strategies to machine a part with the minimum energy
Displaying 16651 - 16675 of 74220