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Displaying 37701 - 37725 of 74030

Counterion associative behavior with flexible polyelectrolytes

September 1, 2004
Author(s)
Vivek M. Prabhu, Eric J. Amis, N S. Rosov
At low ionic strength, organic counterions dress a flexible charged polymer as measured directly by small-angle neutron scattering (SANS) and neutron spin-echo (NSE) spectroscopy. This dressed state, quantified by the concentration dependence of the static

Development Life Cycle and Tools for XML Content Models

September 1, 2004
Author(s)
Boonserm Kulvatunyou, KC Morris, Jeong Buhwan, Puja Goyal
Many integration projects today rely on shared semantic models based on standards represented using Extensible Mark up Language (XML) technologies. Shared semantic models typically evolve and require maintenance. In addition, to promote interoperability

Dielectric Spectroscopy During Extrusion Processing of Polymer Nanocomposites: a High Throughput Processing/Characterization Method to Measure Layered Silicate Content and Exfoliation

September 1, 2004
Author(s)
Rick D. Davis, Anthony J. Bur, M M. McBrearty, Y E. Lee, Jeffrey W. Gilman, P R. Start
Dielectric spectroscopy was conducted during extrusion processing of polyamide-6 (PA6) and layered silicate/polyamide-6 nanocomposites. Dielectric dispersion parameters were identified that appear sensitive to layered silicate concentration and degree of

Effect of Microstructure of Fluorinated Acrylic Coatings on UV Degradation Testing

September 1, 2004
Author(s)
Li Piin Sung, Silvia Vicini, D L. Ho, L Hedli, C Olmstead, Kurt Wood
This paper presents research results on the relationships between the microstructure and the performance/weatherability of fluoropolymer/acrylic coatings. We studied fluoropolymer/acrylic blends of identical composition, prepared as films using three

Effect of Tacticity on the Structure of Poly (1-Octadecene)

September 1, 2004
Author(s)
David L. VanderHart, E Perez, A Bello, G B. Vasquez, Manuel A. Quijada
A sample of poly(1-octadecene), synthesized with a highly active heterogeneous Ziegler-Natta catalyst, has been fractionated with n-heptane, giving soluble and insoluble fractions. Both fractions and the original polymer have been characterized by SEC

Formation of Deprotected Fuzzy Blobs in Chemically Amplified Resists

September 1, 2004
Author(s)
Ronald L. Jones, C G. Willson, T Hu, Eric K. Lin, Wen-Li Wu, D L. Goldfarb, M Angelopoulos, B C. Trinque, G M. Schmidt, M D. Stewart
The requirement of nanometer dimensional control in photolithographic patterning underlies the future of emerging technologies including next generation semiconductors, nanofluidics, photonics, and microelectronic machines (MEMs). Dimensional control is

Four-Wave Mixing in Bose-Einstein Condensate Systems With Multiple Spin States

September 1, 2004
Author(s)
J P. Burke, Paul S. Julienne, Carl J. Williams, Y B. Band, M Trippenbach
We calculate the four-wave mixing (FWM) in a Bose Einstein condensate system having multiple spin wave packets that are initally overlapping in physical space, but have nonvanishing relative momentun that cause them to recede from one another. Three

FY 2004 Programs and Accomplishments Metallurgy Division

September 1, 2004
Author(s)
C A. Handwerker, Frank W. Gayle
This report describes the major technical activities, accomplishments, and areas of scientific expertise in the Metallurgy Division of NIST Materials Science and Engineering Laboratory in FY2004 (October 2003 through September 2004). In this report, we

High-Power Nonlinearity of Optical Fiber Power Meter

September 1, 2004
Author(s)
Igor Vayshenker, Ralph Swafford, Shao Yang
We have developed a system for measuring the nonlinearity of optical fiber power meters at maximum power of 2 W. This system is based on the triplet superposition method. This system provides an accurate determination of optical power meter nonlinearity by

High-Resolution Observations of the Infrared Spectrum of Neutral Neon

September 1, 2004
Author(s)
Craig J. Sansonetti, M M. Blackwell, Edward B. Saloman
We have observed the spectrum of neutral neon (Ne I) emitted by a microwave-excited electrodeless discharge lamp with the National Institute of Standards and Technology 2-m Fourier transform spectrometer. The spectra cover the regions 6929 to 11000 with a

Information Security in the System Development Life Cycle

September 1, 2004
Author(s)
Annabelle Lee, Tanya L. Brewer
Many system development life cycle (SDLC) models exist that can be used by an organization to effectively develop an information system. Security should be incorporated into all phases, from initiation to disposition, of an SDLC model. This Bulletin lays

Infrared Absorptions of the H 2 0 H 2 Complex Trapped in Solid Neon

September 1, 2004
Author(s)
D Forney, Marilyn E. Jacox, Warren E. Thompson
When a sample of neon to which have been added less than 1% each of H 2 and H 2O is deposited at 4.3 K, the infrared spectrum of the resulting solid includes an absorption by the vibrational fundamental of H 2, which is normally infrared-inactive. New
Displaying 37701 - 37725 of 74030