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Displaying 27001 - 27025 of 73929

Architectural Effects on Reaction-Diffusion Kinetics in Molecular Glass Photoresists

April 20, 2010
Author(s)
Vivek M. Prabhu, Shuhui Kang, Christopher L. Soles, Christopher K. Ober, Jing Sha, Jin-Kyun Lee, Peter V. Bonnesen
Understanding acid reaction-diffusion kinetics is crucial for controlling the lithographic performance of chemically amplified photoresists. In this work, we study how the molecular architectures of positive-tone chemically amplified molecular glass

Copulas for Uncertainty Analysis

April 20, 2010
Author(s)
Antonio M. Possolo
Applying the Monte Carlo method for propagation of measurement uncertainty described in the GUM Supplement 1, when the input quantities are correlated, involves the specification of a joint probability distribution for these quantities. In practice

Direct Observation of Coherent Population Trapping in a Superconducting Artificial Atom

April 20, 2010
Author(s)
David P. Pappas, Jeffrey S. Kline, Willim R. Kelley, Zachary Dutton, Thomas A. Ohki, john Schlafer, Bashkar Mookerji
The phenomenon of coherent population trapping (CPT) of an atom (or solid state artificial atom ), and the associated effect of electromagnetically induced transparency (EIT), are clear demonstrations of quantum interference due to coherence in multilevel

NIST Calibration Services for Hydrometers.

April 19, 2010
Author(s)
John D. Wright, Vern E. Bean
The National Institute of Standards and Technology (NIST) provides calibration services for hydrometers used to measure liquid density. Hydrometers with scales for density, specific gravity, proof spirit for alcohol solutions, API degrees for petroleum

Tensile measurement of single crystal gallium nitride nanowires on MEMS test stages

April 18, 2010
Author(s)
J. J. Brown, A. I. Baca, Kristine A. Bertness, D. A. Dikin, R. S. Ruoff, Victor M. Bright
This paper reports the first direct tensile tests on nearly defect free, n-type (Si-doped) gallium nitride single crystal nanowires. Here, for the first time, nanowires have been integrated with actuated, active microelectromechanical (MEMS) structures

An Octacalcium Phosphate Forming Cement

April 16, 2010
Author(s)
Milenko Markovic, Laurence C. Chow
The osteoconductive and possibly osteoinductive characteristics of OCP increased the interest in preparation of bone graft materials that contain OCP in its composition. Calcium phosphate cements (CPCs) were prepared using a mixture of α tricalcium

Diffusion Parameters and Growth Mechanism of Phases in the Cu-Sn System

April 15, 2010
Author(s)
William J. Boettinger, C Ghosh, A Paul
The tracer diffusion coefficients of the elements as well as the integrated interdiffusion coefficients are measured for the Cu(sub3)Sn and Cu(sub6)Sn(Sub5) intermetallic compounds using incremental diffusion couples. The activation energies are determined

Kinetics of the Thermal Reaction of H Atoms with Propyne

April 15, 2010
Author(s)
Claudette M. Rosado-Reyes, Jeffrey A. Manion, Wing Tsang
The reaction of hydrogen atoms with propyne(CH≡CCH3) has been investigated in a heated single pulse shock tube at temperatures of 870-1145K and pressures of 2-9 bar. Stable products from various reaction channels (terminal and non-terminal H addition, and

Shaping Arbitrary Nondiffracting Beams

April 15, 2010
Author(s)
Carlos Lopez-Mariscal, Kristian Helmerson
We present a novel beam shaping method to generate nondiffracting beams with a specific transverse shape. By tailoring the angular spectrum of a Helmholtz-Gauss beam using an iterative Fourier transform algorithm, we produce beams with a specific intensity

Applications of Cross-Correlation Functions

April 14, 2010
Author(s)
Theodore V. Vorburger, Jun-Feng Song, Wei Chu, Li Ma, Xiaoyu A. Zheng, Thomas B. Renegar, Son H. Bui
We describe several examples where we use cross-correlation functions to quantify the similarity of 2D surface profiles or of 3D surface topography images. The applications have included 1) the manufacture of Standard Reference Material (SRM) bullets and

Developing and Implementing a Digital Media Device Lending Program

April 14, 2010
Author(s)
Stacy M. Bruss, Nancy Allmang
This presentation looks at a lending program for iPods, for digital audio/video media, and electronic Kindle book reading devices. It focuses on the processes followed in development and implementation as well as technical and legal considerations and

Direct Evidence of Nanoparticle Release from Epoxy Nanocomposites Exposed to UV Radiation

April 14, 2010
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Xiaohong Gu, Justin M. Gorham, Paul E. Stutzman, Alexander J. Shapiro, Walter E. Byrd, Joannie W. Chin
This study assessed the fate of SiO2 nanoparticles (nanoSiO2) in epoxy/nanoSiO2 composites exposed to ultraviolet (UV) radiation. The matrix was a stoichiometric mixture of adiglycidyl ether of bisphenol A epoxy and an aliphatic tri-amine. Films of

Phase Compatibility of the Thermoelectric Compounds in the Sr-Ca-Co-O System

April 14, 2010
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Joshua B. Martin, Evan L. Thomas, Nathan Lowhorn, James A. Kaduk
Two low-dimensional cobaltite series in the Sr-Ca-Co-O system have been investigated for their solid solution limit, structure, and compatibility phase relationships (850 deg C in air). Thermoelectric properties have been measured for selected members of

NIST Handbook 150-23, 2010 ed., National Voluntary Laboratory Accreditation Program (NVLAP) Homeland Security Applications: Radiation Detection Instruments

April 13, 2010
Author(s)
Betty A. Sandoval, Leticia S. Pibida, Gordon Gillerman, Michael P. Unterweger
NIST Handbook 150-23, NVLAP Homeland Security Applications: Radiation Detection Instruments, presents the technical requirements and guidance for the accreditation of laboratories that test radiation detection instruments used in homeland security

Package "cellVolumeDist"

April 13, 2010
Author(s)
Katharine M. Mullen, Michael W. Halter
This package implements a methodology for using cell volume distributions to estimate cell growth rates and division times that is described in the paper entitled "Cell Volume Distributions Reveal Cell Growth Rates and Division Times", by Michael Halter

Performance of Critical Flow Venturis under Transient Conditions

April 13, 2010
Author(s)
John D. Wright
Critical flow venturis (CFVs) can be used to measure flow under transient pressure and flow conditions with uncertainties of 0.13 % or less (95 % confidence level). Blow-down tests transferred 630 g of nitrogen during a 100 s interval from an unregulated
Displaying 27001 - 27025 of 73929
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