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NIST Authors in Bold

Displaying 10926 - 10950 of 53147

Final report of the key comparison CCQM-K98: Pb isotope amount ratios in bronze

July 1, 2014
Author(s)
Jochen Vogl, Yong-Hyeon Yim, Kyoung-Seok Lee, Heidi Goenaga-Infante, Dmitriy Malinowskiy, Tongxiang Ren, Jun Wang, Robert D. Vocke Jr., Karen E. Murphy, Naoko Nonose, Olaf Rienitz, Janine Noordmann, Teemu Naeykki, Timo Sara-Aho, Bet?l Ari, Oktay Cankur
Isotope amount ratios are proving useful in an ever increasing array of applications that range from studies unravelling transport processes, to pinpointing the provenance of specific samples as well as trace element quantification by using isotope

Influence of morphology on current-voltage behavior of GaN nanowires

July 1, 2014
Author(s)
Paul T. Blanchard, Kristine A. Bertness, Matthew D. Brubaker, Todd E. Harvey, Aric W. Sanders, Norman A. Sanford
We demonstrate the effect that the different morphologies of MBE-grown GaN nanowires (NWs) can have upon current-voltage (I-V) behavior. Two main aspects of NW morphology were investigated. The first aspect was the NW diameter, dNW. For single-crystal Si

Microresonator frequency comb optical clock

July 1, 2014
Author(s)
Scott B. Papp, Katja M. Beha, Pascal P. Del'Haye, Franklyn J. Quinlan, Hansuek Lee, Kerry J. Vahala, Scott A. Diddams
Optical frequency combs enable measurement precision at the 20th digit, and measurement accuracy entirely commensurate with their reference oscillator. A new direction in experiments is the creation of ultracompact frequency combs by way of nonlinear

New Developments in the NIST Infrared Optical Properties of Materials Program

July 1, 2014
Author(s)
Leonard M. Hanssen, Sergey Mekhontsev, Jinan Zeng, John H. Burnett
The Infrared Optical Properties of Materials program in the Sensor Science Division at the National Institute of Standards and Technology (NIST) continues to upgrade its capabilities to provide comprehensive coverage of measurable infrared optical

Preface and Introduction

July 1, 2014
Author(s)
Thomas A. Germer, Joanne C. Zwinkels, Benjamin K. Tsai
This constitutes the front matter (preface and introductory chapter) to the book, "Spectrophotometry: Accurate Measurements of the Optical Properties of Materials," The introduction presents a short history of spectrophotometry. A very brief description of

Scanning Ion Microscopy with Low Energy Lithium Ions

July 1, 2014
Author(s)
Kevin A. Twedt, Lei Chen, Jabez J. McClelland
Using an ion source based on photoionization of laser-cooled lithium atoms, we have developed a scanning ion microscope with probe sizes of a few tens of nanometers and beam energies from 500 eV to 5 keV. These beam energies are much lower than the typical

Significant disparity in base and sugar damage in DNA by neutron and electron irradiation

July 1, 2014
Author(s)
Pawel Jaruga, Jeffrey S. Nico, Lisa R. Karam, Olga Timofeeva, William Blakely, M Miral Dizdar, D Pang
In this study a comparison of the effects of high-LET neutrons with low-LET electrons on irradiation of aqueous DNA solutions was investigated to characterize for potential neutron signatures on DNA damage induction. Ionizing radiations generate numerous

State of the Art Raman Techniques for Biological Applications

July 1, 2014
Author(s)
Angela R. Hight Walker, Alasdair Rae, Rainer Stosch, Petr Klapetek, Debdulal Roy
Raman spectroscopy is a powerful tool for the elucidation of qualitative and quantitative information from biological systems and has huge potential in areas such as biotechnologies, drug discovery, agro-chemical research and clinical diagnostics. This

Structural Materials Data Demonstration Project: Resource for Thermal Process Modeling

July 1, 2014
Author(s)
Carelyn E. Campbell, Ursula R. Kattner, Alden A. Dima, Scott Henry, Larry A. Berardinis, Tom Searles, Laura M. Bartolo
Integrated Computational Materials Engineering (ICME)requires the availability of supporting data for modeling across multiple length scales. It also requires robust data schema and input-output protocols. To address these needs, a team working under a

Tests of Theory in Rydberg States of One-electron Ions

July 1, 2014
Author(s)
Joseph N. Tan, Peter J. Mohr
Comparison of optical frequency measurements to predictions of quantum electrodynamics (QED) for Rydberg states of one-electron ions can test theory and allow new determinations of constants of nature to be made. Simplifications in the QED theory of high

Theoretical Concepts in Spectrophotometric Measurements

July 1, 2014
Author(s)
Thomas A. Germer, Joanne C. Zwinkels, Benjamin K. Tsai
This chapter will describe some of the theoretical concepts of obtaining optical properties from spectrophotometric measurements. The optical properties of interest can be the spectrophotometric quantities themselves or the calculated optical constants

Toxicity of carboxylated carbon nanotubes in endothelial cells is attenuated by stimulation of the autophagic flux associated with the release of nanomaterial in autophagic vesicles

July 1, 2014
Author(s)
Martina Orecna, Silvia De Paoli Lacerda, Olga Janouskova, Tseday Tegegn, Marcela Filapova, John E. Bonevich, Jan Simak
Here, we present a new method for the pharmacological modulation of the vascular toxicity of carbon nanotubes. We report that carboxylated multiwalled carbon nanotubes (MWCNTs) induce autophagosome accumulation in cultured human umbilical vein endothelial

Uncertainty in Bogue-Calculated Phase Composition of Hydraulic Cements

July 1, 2014
Author(s)
Paul E. Stutzman
The Bogue calculations of cement composition are used for manufacturing process control and cement classification. While it is commonly understood that the Bogue calculations are estimates with potential intrinsic biases, the magnitudes of such biases are

Using Network Tainting to Bound the Scope of Network Ingress Attacks

July 1, 2014
Author(s)
Peter M. Mell, Richard Harang
This research describes a novel security metric, network taint, which is related to software taint analysis. We use it here to bound the possible malicious influence of a known compromised node through monitoring and evaluating network flows. The result is

Using Single Particle ICP-MS as a Tool for Understanding Metallic Nanoparticle Transformation during Nanotoxicity Assays

July 1, 2014
Author(s)
Monique E. Johnson, Shannon Hanna, Antonio R. Montoro Bustos, Bryant C. Nelson, Elijah J. Petersen, Lee L. Yu
The advent of engineered nanoparticles (ENPs) and their increased use has remarkably improved the performance of basic materials and consumer products, but has also increased the potential for ENP release into the environment. Technical procedures, more

A Tool for Evaluating Fault Detection and Diagnostic Methods for Fan Coil Units

June 29, 2014
Author(s)
Shokouh Pourarian, Jin Wen, Daniel A. Veronica, Xiaohui Zhou, Ran Liu
Dynamic simulation software “tools” are needed for the research and development of improved methods for automatic control and automated fault detection and diagnosis of heating ventilation and air conditioning (HVAC) systems. These tools must generate data
Displaying 10926 - 10950 of 53147