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Journals

Stability of Blends of Polyether Sulfone With Thermotropic Liquid Crystalline Polymers

January 1, 2000

Author(s)

F Qiao, Kalman D. Migler, Charles C. Han

The formation and stability of various liquid crystalline polymers in PES matrix has been studied by in-line optical and light scattering microscopy. The fiber...

Indentation Modulus and Hardness of Whisker-Reinforced Heat-Cured Dental Resin Composites

January 1, 2000

Author(s)

H H. Xu, Douglas T. Smith, Gary E. Schumacher, F Eichmiller, Joseph M. Antonucci

Recent studies showed that ceramic whisker reinforcement imparted a nearly two-fold increase in the strength of dental resin composites. The aim of the study...

A Practical Fiber Optic Sensor to Monitor Resin Cure and Interphase Formation

January 1, 2000

Author(s)

Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, J H. VanZanten, Joy Dunkers, Richard~undefined~undefined~undefined~undefined~undefined Parnas

A fluorescent probe, covalently grafted to glass, can be used to study the glass/resin interphase region near the surface. A blue shift in fluorescence during...

Laser Spectroscopy of Jet-Cooled Ethyl Radical: Infrared Studies in the CH₂ Stretch Manifold

January 1, 2000

Author(s)

S Davis, D Uy, David Nesbitt

A glow discharge, slit supersonic expansion in conjunction with direct infrared laser absorption methods has been utilized to record high resolution vibration...

Coherence Properties of an Atom Laser

January 1, 2000

Author(s)

M Trippenbach, Y B. Band, M Edwards, M R. Doery, Paul S. Julienne, Edward W. Hagley, Lu Deng, M M. Kozuma, Kristian Helmerson, S L. Rolston, William D. Phillips

We study the coherence properties of an atom laser, which operates by extracting atoms from a gaseous Bose-Einstein condensate via a two-photon Raman process...

Use of Relativistic Effective Core Potentials in the Calculation of Total Electron-Impact Ionization Cross Sections

January 1, 2000

Author(s)

W M. Huo, Yong Sik Kim

The Binary-Encounter-Bethe (BEB) model of Kim and Rudd for total ionization cross sections by electron impact is re-examined when the target is an atom with...

Temperature Dependence of Neutral and Positively Charged Si and SiCl Etch Products During Argon-Ion-Enhanced Etching of Si(100) by Cl₂

January 1, 2000

Author(s)

N Materer, R S. Goodman, S R. Leone

The temperature dependence of neutral and positively charged Si and SiCl etch products produced during argon-ion-enhanced etching of Si(100) in a molecular...

Photofragmentation of Ammonia 193.3 nm: Bimodal Rotational Distribution and Vibrational Excitation of NH₂( )

January 1, 2000

Author(s)

R A. Loomis, J P. Reid, S R. Leone

Time-resolved Fourier transform infrared emission spectroscopy is used to measure the nascent rovibrational distribution of low-lying electronically excited NH...

Laboratory Astrophysics and Microanalysis With NTD-Germanium-Based X-Ray Microcalorimeters

January 1, 2000

Author(s)

E Silver, H. Schnopper, Simon R. Bandler, S Murray, N. Madden, D Landis, J. Beeman, E. E. Haller, M Barbera, G Tucker, John D. Gillaspy, E Takacs, James V. Porto

With the ability to create cosmic plasma conditions in the laboratory it is possible to investigate the dependencies of key diagnostic x-ray lines on density...

Generating Solitons by Phase Engineering of a Bose-Einstein Condensate

January 1, 2000

Author(s)

J Denschlag, J E. Simsarian, D L. Feder, Charles W. Clark, L A. Collins, J Cubizolles, Lu Deng, Edward W. Hagley, Kristian Helmerson, W P. Reinhardt, S L. Rolston, B I. Schneider, William D. Phillips

We demonstrate quantum phase engineering using two novel techniques that allow us to write and read the spatial phase of a Bose-Einstein condensate (BEC). We...

Novel Substrates of Escherichia Coli Nth Protein and Its Kinetics for Excision of Modified Bases From DNA Damaged by Free Radicals

January 1, 2000

Author(s)

M. Dizdaroglu, C Bauche, H Rodriguez, J Laval

Escherichia coli Nth protein (endonuclease III) is a DNA glycosylase with a broad substrate specificity for pyrimidine derivatives. We discovered novel...

NMR Spectroscopy Molecular Dynamics, and Conformation of a Synthetic Octasaccharide Fragment of the O-Specific Polysaccharide of Shigella Dysenteriae Type 1

January 1, 2000

Author(s)

B Coxon, Fahriye N. Sari, G Batta, V Pozsgay

A synthetic octasaccharide fragment of the O-polysaccharide from Shigella dysenteriae type 1 has been studied as its methyl glycoside derivative by one...

Electrostatically Driven Polymer Translocation Through a Narrow Pore

January 1, 2000

Author(s)

Z Konkoli, T Ambjornsson, S P. Apell, John J. Kasianowicz

We studied theoretically how single-stranded DNA enters a nanometer-scale pore. We describe the flux of DNA molecules into the pore as a function of the applied...

Nanoindentation of Polymers: Tip Shape Calibration and Uncertainty Issues

January 1, 2000

Author(s)

Mark R. VanLandingham, John S. Villarrubia, G Meyers

Indentation measurements made with atomic force microscopy (AFM) probes are relative measurements, largely due to the lack of information regarding the tip...

The Role of Periodic Interferometer Errors in the Calibration of Capacitance Displacement Sensors for Nanometrology Applications

January 1, 2000

Author(s)

R Koning, Ronald G. Dixson, Joseph Fu, Theodore V. Vorburger

Although the role of the periodic errors of optical heterodyne interferometers in displacement measurements is fairly well understood, their influence on the...

Density Variations in Scanned Probe Oxidation

January 1, 2000

Author(s)

K Morimoto, F Perez-murano, John A. Dagata

The density of oxide nanostructures produced by scanned probe microscopy (SPM) is a function of substrate doping and voltage-pulse parameters. The total oxide...

Carrier Concentration Dependence of Scanning Capacitance Microscopy Signal in the Vicinity of P-N Junctions

January 1, 2000

Author(s)

Joseph Kopanski, Jay F. Marchiando, Brian G. Rennex

Scanning capacitance microscopy was used to image 1) boron dopant gradients in p-type silicon, and 2) identical boron dopant gradients in n-type silicon. The...

Nanosecond Magnetization Reversal in High Coercivity Thin Films

January 1, 2000

Author(s)

N D. Rizzo, Thomas J. Silva, Anthony B. Kos

We used a wide-field Kerr microscope to measure magnetization reversal in high coercivity thin film media that were subjected to nanosecond field pulses...

IC Test Structures for Multi-Layer Interconnect Stress Determination

January 1, 2000

Author(s)

S. A. Smee, Michael Gaitan, Donald B. Novotny, Yogendra K. Joshi, David L. Blackburn

A new method for measuring strain in multi-layer IC interconnects is presented. This method utilizes process compatible micromachined test structures and is...

Transport Properties of Petroleum Fractions

January 1, 2000

Author(s)

M E. Baltatu, R A. Chong, Marcia L. Huber, Arno D. Laesecke

A corresponding-states model for the properties of petroleum fractions is presented.

Decoherence of Quantum Superpositions Through Coupling to Engineering Reservoirs

January 1, 2000

Author(s)

C J. Myatt, B E. King, Q A. Turchette, C A. Sackett, D Kielpinski, Wayne M. Itano, W M. Monroe, David J. Wineland

The theory of quantum mechanics applies to closed systems. In such ideal situations, a single atom can, for example, exist simultaneously in a superposition of...

NIST Unveils Status of PIM Testing

January 1, 2000

Author(s)

Jeffrey Jargon, Donald C. DeGroot

In response to requests by U.S. industry and members of the International Electrotechnical Commision, the National Institute of Standards and Technology...

Transport Property Measurements on the IUPAC Sample of 1,1,1,2-Tetrafluoroethane (R134a)

January 1, 2000

Author(s)

Marc J. Assael, A Leipertz, E MacPherson, Y Nagasaka, Carlos A. Nieto de Castro, Richard A. Perkins, K Strom, Eric M. Vogel, William A. Wakeham

This paper reports the results of an international project coordinated by the Subcommittee on Transport Properties of Commission 1.2 of the International Union...

Cyclic Testing of Steel Moment Frame Connections Rehabilitated with RBS or Welded Haunch

January 1, 2000

Author(s)

Chia-Ming Uang, Q -. Yu, S Noel, John L. Gross

The effectiveness of using the reduced beam section (RBS) and welded haunch for seismic rehabilitation of pre-Northridge steel moment connections was...

Seismic Rehabilitation Design of Steel Moment Connection with Welded Haunch

January 1, 2000

Author(s)

Q -. Yu, Chia-Ming Uang, John L. Gross

This paper describes a design procedure for the seismic rehabilitation of pre-Northridge steel moment connections using a welded haunch. Experimental results...

Growth Inhibition and Transient Temperature Measurement of Laser-Irradiated Hair Fibers and Follicles

January 1, 2000

Author(s)

L K. Iwaki, T Heimer, Edwin J. Heilweil, P A. Manos

Temperature changes, infrared (IR) images, and heat propagation kinetics of laser irradiated hair fibers and live follicles were measured using a cooled InSb...