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 26451 - 26475 of 73929

Impact of molecular mass on the elastic modulus of polystyrene thin films

July 31, 2010
Author(s)
Jessica M. Torres, Christopher Stafford, Bryan D. Vogt
Euler wrinkling was used to determine the elastic modulus at ambient temperature of polystyrene (PS) films of varying thickness and relative molecular mass (Mn). A range of Mn from 1.2 kg/mol to 990 kg/mol was examined to determine if the molecular size

NUMERICAL SIMULATION OF POLYMER MATERIALS IN STANDARD FIRE TESTS: PYROLYSIS AND THE IMPACT OF RESIDUE FORMATION

July 31, 2010
Author(s)
Florian Kempel, Bernhard Schartel, Anja Hofmann, Gregory T. Linteris, Richard E. Lyon, Richard N. Walters, Stanislav Stoliarov
Two different numerical simulation tools, Fire Dynamic Simulator FDS and ThermaKin, are investigated with respect to their capability to predict the mass loss rate of polymer materials exposed to different fires. For validation, gasification apparatus and

Comparison of Microwave Black-Body Target Radiometric Measurements

July 30, 2010
Author(s)
Dave K. Walker, Dazhen Gu, Katherine MacReynolds, Randy Direen, James P. Randa, Amanda Cox, Derek A. Houtz, Robert L. Billinger
Accurate characterization of the brightness temperature (T_B) of black-body targets used for calibrating microwave remote-sensing radiometers includes many inputs: antenna pattern and loss, target temperature, target emissivity, mechanical alignment, and

Investigation into the Standardization of Tc-99

July 30, 2010
Author(s)
Lizbeth Laureano-Perez, Ronald Colle, Ryan P. Fitzgerald, Brian E. Zimmerman, Lonnie T. Cumberland
The standardization of 99Tc by several primary methods was investigated. This was performed to support a new 99Tc transfer standard that has been developed and will be disseminated by the National Institute of Standards and Technology (NIST) as Standard

Metrology of Microstructured Waveguides for Spintronic Applications

July 30, 2010
Author(s)
SangHyun S. Lim, Atif A. Imtiaz, Dazhen Gu, Pavel Kabos, Thomas Mitchell (Mitch) Wallis
Patterned permallay films as a part of a coplanar waveguide (CPW) were fabricated, and the magnetization dynamics of such structures was investigated as fundamental building blocks for magnetic spintronic devices. Anisotropic magneto-resistance (AMR)

Micro-feature dimensional and form measurements with the NIST fiber probe on a CMM

July 30, 2010
Author(s)
Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup, Chittaranjan Sahay
The NIST fiber probe is a Coordinate Measuring Machine (CMM) probing system intended for diameter and form measurement of micro features and small holes. This Moore M48 CMM at NIST can measure holes down to 500 um diameter with the Movamatic probe; the

REFLECTIVITY STUDIES OF PASSIVE MICROWAVE CALIBRATION TARGETS AND ABSORPTIVE MATERIALS

July 30, 2010
Author(s)
Dazhen Gu, Amanda Cox, Derek A. Houtz, Dave K. Walker, James P. Randa, Robert L. Billinger
We report the characterization of blackbody reflections as a part of the recent progress on the development of brightness standards for microwave remote sensing at National Institute of Standards and Technology (NIST).Three blackbody targets at variable

Use of Electronic Calibration Units for Vector-Network-Analyzer Verification

July 30, 2010
Author(s)
Dylan F. Williams, Arkadiusz C. Lewandowski, Denis X. LeGolvan, Ronald A. Ginley, Chih-Ming Wang, Jolene D. Splett
We present measurements indicating that electronic calibration units are stable enough to be used in place of mechanical vector-network-analyzer verification artifacts. This enables a new fully automated approach to verifying microwave vector-network

Using Microfluidic Channels to Determine ZThe Quantitative Permittivity of Nanoliter Fluid Volumes from 50 MHz TO 40 GHz USING MICROFLUIDIC CHANNELS TO DETERMINE THE QUANTITATIVE PERMITTIVITY OF NANOLITER FLUID VOLUMES FROM 50 MHZ TO 40 GHZ

July 30, 2010
Author(s)
James C. Booth, Nathan D. Orloff, Xiaoli Lu, Yu Y. Wang, Eduard Rocas, Jordi Mateu, Juan C. Collado Gomez, Michael D. Janezic
We describe the development of coplanar waveguide measurement structures integrated with microfluidic channels in order to rapidly determine the broadband dielectric properties of nanoliter volumes of fluids, fluid mixtures, and colloids over the range of

Examining the True Effectiveness of Loading a Reverberation Chamber

July 29, 2010
Author(s)
Jason Coder, John M. Ladbury, Christopher L. Holloway, Kate Remley
In this paper we explore how placing the same amount of absorber in different locations within a reverberation chamber can have different loading effects. This difference can have a significant impact on measurement reproducibility, both for measurements

SEABIRD TISSUE ARCHIVAL AND MONITORING PROJECT: Project Overview, and Updated Protocols for Collecting and Banking Seabird Eggs

July 29, 2010
Author(s)
Lauren B. Rust, Rebecca S. Pugh, Amanda J. Moors, Stacy S. Schuur, David G. Roseneau, Paul R. Becker
The Seabird Tissue and Archival Monitoring Project (STAMP) is a collaborative effort by the U.S. Fish and Wildlife Service (USFWS), the Alaska Maritime National Wildlife Refuge (AMNWR), and the National Institute of Standards and Technology (NIST) to

Converting Technical Content to Training Material

July 28, 2010
Author(s)
Georgia L. Harris, Dana S. Leaman
This paper provides the basis for an interactive mini tutorial and covers how to convert technical content to training materials. It includes: defining the audience, writing learning objectives, designing content and activities to achieve objectives

Arbitrary Control of Entanglement between Two Superconducting Resonators

July 27, 2010
Author(s)
Raymond W. Simmonds
We present a method to synthesize an arbitrary quantum state of two superconducting resonators. This state-synthesis algorithm utilizes a coherent interaction of each resonator with a tunable arti cial atom to create entangled quantum superpositions of

Guide to Adopting and Using the Security Content Automation Protocol (SCAP), Version 1.0

July 27, 2010
Author(s)
Stephen D. Quinn, Karen A. Scarfone, Matthew P. Barrett, Christopher S. Johnson
The purpose of this document is to provide an overview of the Security Content Automation Protocol (SCAP). This document discusses SCAP at a conceptual level, focusing on how organizations can use SCAP-enabled tools to enhance their security posture. It

A NIST Disciplined Oscillator

July 26, 2010
Author(s)
Michael A. Lombardi
The National Institute of Standards and Technology (NIST) now offers a service that provides customers with an oscillator locked to UTC(NIST), the United States national standard for frequency and time. A NIST disciplined oscillator (NISTDO) works by

Challenges in SIM to Create a Coordination Program for Time and Frequency

July 26, 2010
Author(s)
J. Mauricio Lopez-Romero, Michael A. Lombardi
The Sistema Interamericano de Metrologia (SIM), one of the world s five major regional metrology organizations (RMOs) recognized by the Bureau International des Poids et Mesures (BIPM), is comprised of national metrology institutes (NMIs) located in all 34

Demonstration of a Meissner-Effect Transition Edge Sensor

July 26, 2010
Author(s)
Solomon I. Woods, Stephen M. Carr, Timothy M. Jung, Adriaan C. Carter, Raju V. Datla
We have built and tested a transition edge sensor which monitors temperature change by measuring magnetic flux expulsion from a superconducting element. Flux change is sensed by a dc SQUID coupled to the element using a flux transformer in a gradiometer

An Integrated Interactive Visualization and Analysis Environment to study the Impact of Fire on Building Structures

July 25, 2010
Author(s)
Dilip K. Banerjee, John L. Gross, Pradeep R. Gaddam, Thomas M. Olano, William J. Hess, Judith E. Terrill, Terence J. Griffin, John G. Hagedorn, John T. Kelso, Steven G. Satterfield
We have created an integrated interactive visualization and analysis environment, that can be used immersively or on the desktop, to study the interaction among fire, heat transfer, and structural deformation computed from three linked simulations. In this
Displaying 26451 - 26475 of 73929
Was this page helpful?