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Displaying 3626 - 3650 of 74220

Medical Implant Information, Performance, and Policies Workshop

October 12, 2021
Author(s)
A A. Ciarkowski, G Devey, H Heffernan, C A. Kelley, B Liebler, W F. Regnault, W L. Shinowara, M D. Sourwine, John A. Tesk, J R. Watson
The BMIS Coordinating Committee organized a workshop on September 19 and 20, 2002, in Gaithersburg, MD, to evaluate the role of the Federal Government in extracting and disseminating information gained from explanted medical implants to provide information

Mercury in the HgMn Stars X Lupi and HR 7775

October 12, 2021
Author(s)
C R. Proffitt, T Brage, D S. Leckrone, G Wahlgren, J C. Brandt, Craig J. Sansonetti, Joseph Reader, S Johansson
Observations of mercury lines in the HgMn stars chi Lupi and HR 7775 made with the Hubble Space Telescope's Goddard High Resolution Spectrograph are presented and analyzed. In chi Lupi we find that all observed lines are consistent with the same isotopic

Methylmercury inTtuna: Demonstrating Measurement Capabilities and Evaluating Comparability of Results Worldwide From the CCQM P-39 Comparison

October 12, 2021
Author(s)
C Quetel, J P. Snell, Y Aregbe, L Abranko, Z S. Jokai, C Brunori, R Morabito, W Hagan, S. Azemard, E Wyse, V Fajon, M. Horvat, M. Logar, O.F. X. Donard, E Krupp, J Entwisle, R Hearn, Michele M. Schantz, K Inagaki, A Takatsu, P Grinberg, S. N. Willie, H Hintelmann, E Bjorn, E Blanco Gonzalez, G Centineo, J Ignacio Garcia Alonso, A Sanz-Medel
Six Metrology Institutes (NMIs), representing at the Comit International des Poids et Mesures (CIPM) 4 Member States of the Metre Convention and 2 international organisations, and 8 expert laboratories selected outside CIPM have compared their capabilities

Microstructural Evolution in Lead-Free Solder Alloy. Part II: Directionally Solidified Eutectic Tin-Silver-Copper, Tin-Copper and Tin-Silver Alloys.

October 12, 2021
Author(s)
S L. Allen, M R. Notis, R R. Chromik, Richard P. Vinci, D J. Lewis, Robert J. Schaefer
The tin-silver-copper eutectic is a three-phase eutectic consisting of Ag(sub3)Sn plates and Cu(sub6)Sn(sub 5) rods in a (Sn) matrix. It is thought that the two phases will coarsen independently. Directionally solidified ternary eutectic and binary

Microwave-Based Structure and Four-Simensional Morphed Intermolecular Potential for HI-CO 2

October 12, 2021
Author(s)
Wolfgang Jabs, Fabrice Willaert, Blake McElmurry, Luis Rivera-Rivera, Raffaele Montuoro, R R. Lucchese, J W. Bevan, R D. Suenram
Microwave spectra of the four isotopomers, HI-12C16O2, HI-12C18O2, HI-12C18O16O, and HI-12C16O18O have been recorded using pulsed-nozzle Fourier-transform microwave spectroscopy. In the last two isotopomers, the heavy oxygen atom tilted toward and away

Mixed-Surfactants as a Novel Approach to Atomic Engineering of Spin Valves

October 12, 2021
Author(s)
D X. Yang, H D. Chopra, P J. Chen, William F. Egelhoff Jr.
Previously, surfactants in ultra-high vacuum have been used to obtain smooth interfaces in giant magnetoresistance effect (GMR) spin valves for an enhanced GMR. In the present study, a novel extension to the surfactant approach has been developed, called

Mobilities of aromatic ions drifting in helium

October 12, 2021
Author(s)
M Krishnamurthy, J A. de Gouw, V M. Bierbaum, S R. Leone
Benzene dimer cations (C 12H 12+and C 12H 11+) are produced in the flow tube section of a selected-ion flow-drift tube (SIFDT) apparatus. The reduced mobilities of these ions in helium are measured as a function of the characteristic parameter E/N (the

Mobilities: Small Systems

October 12, 2021
Author(s)
J Husband, S R. Leone
Motion of one species with respect to another is governed by their mutual interaction potential. Since ions are readily manipulated in electricfields, experimentalists since the end of the nineteenth century have been able to direct and watch the flow of

Modal Reconstruction of Aspheric Surfaces From Experimental Second Derivatives

October 12, 2021
Author(s)
Nadia Machkour-Deshayes, Byoung C. Kim, Robert S. Polvani, Ulf Griesmann
A method for the measurement of precise aspheric optical surfaces based on measurements of the second derivatives of the surface is evaluated. A compact phase-measuring interferometer is used to determine the second derivatives of a surface on a survey

Model for Dispersion Rheology

October 12, 2021
Author(s)
J Bicerano, Jack F. Douglas, D A. Brune
A general model of the viscosity of complex-shaped particle dispersions is developed based on an exact virial expansion about the low concentration limit and a mathematical analogy between the hydrodynamics of concentrated particle suspensions and the

Molecular Computers for Solving Computational Decision Problems

October 12, 2021
Author(s)
Z Amitay, R Kosloff, S R. Leone
State-selective coherent control tailored molecular wave packets is implemented for solving computational decision problems. The current study involves graphs composed of vertices and edges, and the computational task is to determine the connectivity of a

Molecular Modeling of the Thermal Decomposition of Polymers

October 12, 2021
Author(s)
S I. Stoliarov, H Zhang, P R. Westmoreland, R Lyon, Marc R. Nyden
Applications presented in this work demonstrate the potential for using quantum mechanics and molecular simulations to determine the mechanisms and rates of the thermal decomposition of polymers. The expectation is that these capabilities can be used to

Molecular Production in Two Component Atomic Fermi Gases

October 12, 2021
Author(s)
J Chwedenczuk, K Goral, T K hler, Paul S. Julienne
We provide a practical approach to the molecular production via linear downward sweeps of Feshbach resonances in degenerate Fermi gases containing incoherent mixtures of two atomic spin states. We show that the efficiency of the association of atoms is

Molecular-scale Structural and Functional Characterization of Sparsely Tethered Bilayer Membranes

October 12, 2021
Author(s)
Duncan McGillivray, Gintaras Valincius, David J. Vanderah, W Febo-Ayala, John T. Woodward IV, F Hienrich, John J. Kasianowicz, M Losche
Surface-tethered biomimetic bilayer membranes (tethered lipid bilayer membranes, tBLMs) have been formed on gold surfaces from phospholipids and a synthetic 1-thiahexa(ethy lene oxide) lipid, WC14. They have been characterized using electrochemical

Morphology Dependence of Ultrafast Emission From Metal-Dendrimer Nanocomposites

October 12, 2021
Author(s)
O Varnavski, T Goodson, F Groehn, Barry J. Bauer, Eric J. Amis
We report the results of ultra-fast fluorescence investigations from gold-dendrimer nanocomposites of different morphologies. Femtosecond depolarized emission has been detected and characterized for Polyamidoamine (PAMAM) G5-based gold colloids, which

Multi-Pole Representation of the Dielectric Matrix

October 12, 2021
Author(s)
J A. Soininen, J J. Rehr, Eric L. Shirley
A good approximation for the electron self-energy or the electron quasiparticle properties is needed for an accurate calculation of x-ray absorption spectra. The GW approximation (GWA) has been found to be relatively reliable in predicting the

Nano/Bioscience and Technology Education for the 21st Century

October 12, 2021
Author(s)
J Jacobs, Winnie Wong-Ng, Gale A. Holmes, Richard F. Kayser
NEW:Update 2005, the 20th annual workshops for science and technology educators with the theme, NANO/BIOSCIENCE AND TECHNOLOGY EDUCATION FOR THE 21ST CENTURY, was hosted by the National Institute of Standards and Technology/Materials Science and
Displaying 3626 - 3650 of 74220