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Journals

Structure and Property Characterization of Low-k Dielectric Porous Thin Films

April 1, 2001

Author(s)

Barry J. Bauer, Eric K. Lin, V. J. Lee, Haonan Wang, Wen-Li Wu

High-resolution X-ray reflectivity and small angle neutron scattering measurements are used as complementary techniques to characterize the structure and...

In Order to Form a More Perfect UNION

April 1, 2001

Author(s)

Isabel M. Beichl, F Sullivan

In this computing prescription we present an algorithm for finding a minimum spanning tree figure 1 shows a typical application of this MST algorithm. Here we...

Conformance Testing and Certification Framework

April 1, 2001

Author(s)

Lisa J. Carnahan, Lynne S. Rosenthal, Mark Skall

This white paper presents the general concepts, components, and issues related to establishing and administering a conformance testing and certification program...

Java and Numerical Computing

April 1, 2001

Author(s)

Ronald F. Boisvert, J Moreira, M Philippsen, Roldan Pozo

We discuss the advantages and disadvantages of using Java for numerical computing. We provide examples of current performance levels and propose several...

Fatigue Resistant, High Temperature Solder

April 1, 2001

Author(s)

Frank W. Gayle

The National Center for Manufacturing Sciences (NCMS) High Temperature Fatigue Resistant Solder Project, carried out by a consortium of eight industrial...

NIR Applications for Measuring Water Sorption and Vinyl Unsaturation in Dental Dimethacrylate Polymers

April 1, 2001

Author(s)

Sabine H. Dickens, J W. Stansbury, C J. Floyd

Integrated near infrared (NIR) absorbance has been used to determine the absorptivity of the [nu] 2+[nu] 3 combination band of water in several organic solvents...

Application of a New Thermochemical Measurement Method for Nuclear Materials at Temperatures Beyond 3000k

April 1, 2001

Author(s)

John W. Hastie, D W. Bonnell, Peter K. Schenck

In processing and end-use environments, and particularly nuclear fission reactor excursions, inorganic materials can be subjected to temperatures where liquids...

Elastic Strain and Stress Determination by Rietveld Refinement: Generalized Treatment for Textured Polycrystals for all Laue Classes

April 1, 2001

Author(s)

N Popa, Davor Balzar

We propose a novel approach to model diffraction peak shifts caused by residual or applied stresses in textured polycrystals. The models yields the complete...

Effect of Flow Due to Density Change on Eutectic Growth

April 1, 2001

Author(s)

Sam R. Coriell, Geoffrey B. McFadden, William F. Mitchell, B T. Murray, J B. Andrews, Y B. Arikawa

The Jackson-Hunt model of eutectic growth is extended to allow for different densities of the phases. The density differences give rise to fluid flow which is...

Thermal Expansion of Supported Thin Polymer Films: A Direct Comparison of Free Surface vs. Total Confinement

April 1, 2001

Author(s)

D J. Pochan, Eric K. Lin, Sushil K. Satija, Wen-Li Wu

Neutron Reflectivity measurements on thin, deuterated polystyrene films reveal a strong dependence of the polymer melt coefficient of thermal expansion (CTE) on...

Thermodynamic and Structural Aspects of the Potential Energy Surface of Simulated Water

April 1, 2001

Author(s)

Francis W. Starr, Srikanth Sastry, E LaNave, A Scala, H E. Stanley, F Sciortino

Relations between the thermodynamics and dynamics of supercooled liquids approaching the glass transition have been propposed over many years. This connections...

Mechanical Properties of Ultra High Molecular Weight Polyethylene NIST Reference Material RM 8456

April 1, 2001

Author(s)

F Eichmiller, John A. Tesk, C M. Croarkin

A NIST Reference Material, RM 8456,was characterized for 184 bars of Ultra High Molecular Mass Polyethelene (UHMW) , each unit was 7.62 mm (3 in) in diameter...

Characterization of Symmetric Diblock Copolymers With High-Throughput Techniques

April 1, 2001

Author(s)

Alamgir Karim, A P. Smith, Jack F. Douglas, Eric J. Amis

Surface pattern formation in thin block copolymer films is investigated utilizing a high-throughput methodology by creating films having gradients in film...

Visualizing the Elimination of Sharkskin Through Fluoropolymer Additives: Coating and Polymer-Polymer Slippage

April 1, 2001

Author(s)

Kalman D. Migler, C LavallTe, M P. Dillon, S S. Woods, C L. Gettinger

We developed a capillary rheo-optics technique to visualize the mechanism by which fluoropolymer additives eliminate a distortion called sharkskin in the...

Phase Separation Induced by Shear Quenching in Polymer Blends With a Diblock Copolymer

April 1, 2001

Author(s)

H Jeon, Sangcheol Kim, Charles C. Han

The effects of adding A-B diblock copolymer to a polymer blend (A/B) on phase- separation kinetics and morphology have been investigated in a fixed shallow...

The Location of Very Small Particles in Silane RF Discharge

April 1, 2001

Author(s)

K Rozsa, G Bano, Alan Gallagher

The size and location of silicon particles that grow in a pure silane, capacitively coupled RF discharge, are measured by laser light scattering. The discharge...

Absolute Quantum Efficiency Measurements Using Correlated Photons: Toaward a Measurement Protocol

April 1, 2001

Author(s)

Alan L. Migdall

Correlated photons can be used to measure of the quantum efficiency of photon counting photodetectors without ties to any externally calibrated standards. We...

Collisional Frequency Shifts in ¹³³Cs Fountain Clocks

April 1, 2001

Author(s)

P J. Leo, Paul S. Julienne, F H. Mies, Carl J. Williams

We present a theoretical analysis of the pressure shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys...

Precision Measurement of Wavelengths Emitted by a Molecular Fluorine Laser at 157 nm

April 1, 2001

Author(s)

Craig J. Sansonetti, Joseph Reader, K Vogler

The wavelengths of six spectral lines emitted by a molecular fluorine (F2) laser at 157 nm were measured to high accuracy with the 10.7-m normal-icidence vacuum...

The Location of Very Small Particles in Silane RF Discharges

April 1, 2001

Author(s)

K Rozsa, G Bano, Alan Gallagher

The size and location of silicon particles that grow in a pure silane, capacitively coupled rf discharge are measured by laser light scattering.The discharge...

Competition of Charge, Orbital, and Ferromagnetic Correlations in Layered Manganites

April 1, 2001

Author(s)

D B. Romero, Y Moritomo, J.F. Mitchell, H D. Drew

We investigated the competition of charge, orbital, and ferromagnetic interactions in layered manganites by magneto-Raman scattering spectroscopy. The charge...

The Role of Fundamental Constants in the International System of Units (SI): Present and Future

April 1, 2001

Author(s)

Barry N. Taylor, Peter J. Mohr

This paper addresses the role of fundamental constants in (1) the current definitions of the base units; (2) practical representations of SI electric units and...

Formation of Rydberg Atoms in an Expanding Ultracold Neutral Plasma

April 1, 2001

Author(s)

M J. Lim, T C. Killian, S Kulin, R Dumke, S Bergeson, S L. Rolston

We study the formation of Rydberg atoms in expanding plasmas at temperatures of 1-1000K and densities from 10^5 - 10^10 cm^-3. Up to 20% of the initially free...

Diffraction and Depths-of-Field Effects in Electron Beam Imaging at SURF III

April 1, 2001

Author(s)

Uwe Arp

Imaging an electron beam with visible light is a common method of diagnostics applied to electron accelerators. It is a straightforward way to deduce the...

Electron Self-Energy for the K and L Shells at Low Nuclear Charge

April 1, 2001

Author(s)

U Jentschura, Peter J. Mohr, G Soff

A nonperturbative numerical evaluation of the one-photon electron self energy for the K- and L-shell states of hydrogen like ions with nuclear charge numbers Z...

Dental Resin Composites Containing Silica-Fused Whiskers: Effects of Whisker-to-Silica Ratio on Fracture Toughness and Indentation Properties

April 1, 2001

Author(s)

Hockin D. Xu, Janet Quinn, Douglas T. Smith, Joseph M. Antonucci, Gary E. Schumacher, F Eichmiller

Dental resin composites need to be strengthened in order to improve their performance in large stress-bearing applications such as crowns and multiple-unit...

Boat Conformations Part IV- Synthesis, NMR Spectroscopy, and Molecular Dynamics of Methyl 4,6-O-Benzylidene-3-Deoxy-3-Phthalimido-alpha-D-Altropyranoside Derivatives

April 1, 2001

Author(s)

B Coxon, R C. Reynolds

dition of the elements of phthalimide to methyl 2,3-anhydro-4,6-O-benzylidene-α-D-mannopyranoside (1) under fusion conditions has yielded methyl 4,6-O...

Interferometric measurement of refractive-index change in photosensitive glass

April 1, 2001

Author(s)

Tasshi Dennis, E. M. Gill, Sarah L. Gilbert

We report on a technique for determining the change in the refractive index of photosensitive glass. We have demonstrated our interferometer-based technique on...

Responsivity calibration methods for 365 nm irradiance meters

April 1, 2001

Author(s)

Thomas C. Larason, Steven W. Brown, George P. Eppeldauer, Keith R. Lykke

Thermal Conductivities of Alternatives to CFC-11 for Foam Insulation

April 1, 2001

Author(s)

Richard A. Perkins, L -. Cusco, J -. Howley, Arno R. Laesecke, S -. Matthes, M L. Ramires

The present work examines the thermal conductivities of several dilute vapors which are potential alternatives to chlorofluorocarbons (CFCs) for cellular...

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