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Displaying 38976 - 39000 of 73461

Field Measurements of State of Polarization and PMD from a Tier-1 Carrier

February 1, 2004
Author(s)
D Peterson, Paul Leo, Kent B. Rochford
Field measurements of the state of polarization in buried and aerial transmission fiber are presented and analyzed. State of polarization changes measured under field conditions are compared to the state of polarization changes generated by commercially

Flame Retardant Mechanism of Polyamid 6 - Clay Nanocompsoites

February 1, 2004
Author(s)
Takashi Kashiwagi, Richard H. Harris Jr., X H. Zhang, R M. Briber, Srinivasa R. Raghavan, W H. Awad, John R. Shields
The thermal and flammability properties of polyamide 6/clay (2 % and 5 % by mass) nanocomposites were measured to determine their flame retardant performance. The gasification process of the nanocomposite samples at an external radiant flux of 50 kW/m2 in

Fundamental Parameters Line Profile Fitting in Laboratory Diffractometers

February 1, 2004
Author(s)
R W. Cheary, A A. Coelho, James Cline
The fundamental parameters approach to line profile fitting uses physically based models to generate the line profile shapes. Fundamental parameters profile fitting (FPPF) has been used to synthesize and fit data from both parallel beam and divergent beam

High Throughput Measurement of the Elastic Modulus of Polymer Thin Films

February 1, 2004
Author(s)
Christopher M. Stafford, A Chiche, D Julthongpiput, Michael J. Fasolka
Combinatorial and High Throughput (C&HT) methods combine clever experiment design, instrument automation, and computing tools to form a new paradigm for scientific research. Given this premise, the C&HT concept is being adapted to study problems in

High-Frequency Dielectric Relaxation in Trehalose-Glycerol Mixtures

February 1, 2004
Author(s)
O Anopchenko, Jan Obrzut, Bert W. Rust
Broadband dielectric measurements were performed on a series of trehalose-glycerol mixtures in a wide concentration range of glycerol and temperature swept from 220 K to 350 K. Relaxation spectra were obtained directly from the measured dielectric spectra

High-Throughput Adhesion Testing of Combinatorial Libraries With Multi-Lens Arrays

February 1, 2004
Author(s)
Aaron M. Forster, Wenhua Zhang, Christopher Stafford
The NIST Combinatorial Methods Center (NCMC) has adapted the Johnson, Kendall, and Roberts (JKR) test to develop a high-throughput adhesion measurement platform. Traditionally, the JKR test utilizes a single hemispherical lens compressed against (loading)

Hydrosomes and Optical Tweezers: What Can We Do With the World s Smallest Test Tubes?

February 1, 2004
Author(s)
Joseph E. Reiner, Rani B. Kishore, Kristian Helmerson, M K. Gilson
Hydrosomes are micron sized surfactant stabilized water droplets in a fluorocarbon background. Different chemicals can be mixed with the water droplets to form subpicoliter-sized containers. When two hydrosomes come into contact with each other they

Information Depth for Elastic-Peak Electron Spectroscopy

February 1, 2004
Author(s)
Aleksander Jablonski, Cedric J. Powell
We present a formalism for calculating the information depth (ID) for elastic-peak electron spectroscopy (EPES) in which a measurement is made of the intensity of elastically-backscattered electrons for an amorphous or polycrystalline material and a

Intuitive Diffraction Model for Multistaged Optical Systems

February 1, 2004
Author(s)
Eric L. Shirley
A simplified framework is motivated, in which many diffraction effects can be treated, especially in multi-staged optical systems. These include effects of limiting apertures, although this work may be especially suitable when considering diffraction

Investigations of Electrospray Sample Deposition for Polymer MALDI Mass Spectrometry

February 1, 2004
Author(s)
S D. Hanton, I Z. Hyder, J R. Stets, K G. Owens, William R. Blair, Charles M. Guttman, Anthony A. Giuseppetti
In the interest of more thoroughly understanding the relationship between sample preparation technique and spectra quality produced in Matrix-Assisted Laser Desorption/Ionization (MALDI) mass spectrometry, we have investigated details of the Electrospray

Matrix Decompositions and Entanglement Dynamics

February 1, 2004
Author(s)
Stephen Bullock, G K. Brennen
Given a closed system of quantum data, quantum computations are mathematically modeled by exponentially large unitary matrices. A matrix decomposition is an algorithm for factoring matrices, and in this context such an algorithm splits a quantum

Modeling, Simulation and Prediction of Rockwell Hardness Indentation

February 1, 2004
Author(s)
Li Ma, Samuel R. Low III, Richard J. Fields, Roland deWit, Jun-Feng Song, Theodore V. Vorburger, J Zhou
Rockwell hardness test, as a measure of the resistance of a material to localized plastic deformation, is a valuable and widely used mechanical test. However, the accuracy of Rockwell hardness measurement is still in question. The indenter, including both

Molecular Dynamics Study of the Surface Tension of a Binary Immiscible Fluid

February 1, 2004
Author(s)
V Simmons, Joseph B. Hubbard
The planar interface between two liquids having two degrees of affinity to mix has been studied by molecular dynamics simulations. The surface tension is calculated from the normal, P N, and transverse, P T, components of the pressure tensor P for a wide

Near-Threshold Photoassociation of 87 Rb 2

February 1, 2004
Author(s)
M Kemmann, R Mistrik, S Nussmann, H Helm, Carl J. Williams, Paul S. Julienne
Photoassociation of cold 87Rb (5s, fb+2) atom pairs is studied within 15 GHz of the dissociation limits 87Rb(5p3/2, fa) + 87Rb(5s, fb =2). Vibrational levels in the long range, hyperfine-manifolds of the 0? and 1g states arising from the 87Rb(5p3/2)-fine
Displaying 38976 - 39000 of 73461
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