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Displaying 39076 - 39100 of 73830

An EQMB Examination of Cu Surface Oxides in Borate Buffer

April 1, 2004
Author(s)
Ugo Bertocci
The oxidation and reduction of copper, either electrodeposited or vapor-deposited onto quartz crystal resonators, was examined in borate/boric acid mixtures at different pH's, comparing electrochemical measurements with mass changes. The results showed

An Optimized Design of Finned-Tube Evaporators Using the Learnable Evolution Model

April 1, 2004
Author(s)
Piotr A. Domanski, David A. Yashar, Kenneth Kaufman, RK S. Michalski
Optimizing the refrigerant circuitry for a finned-tube evaporator is a daunting task for traditional exhaustive search techniques due to the extremely large number of circuitry possibilities. For this reason, more intelligent search techniques are needed

Beam-Loss Spectroscopy of Cold Collisions in a Bright Sodium Beam

April 1, 2004
Author(s)
J Ramirez-Serrano, W DeGraffenreid, J Weiner, Eite Tiesinga, Paul S. Julienne
We report beam loss photoassociation (PA) spectra of cold collisions within a slow, bright Na atom beam near the D1 resonance line. The high collimation and brilliance of the atomic beam permits the detection of atomic fluorescence loss resulting from the

Beyond Geometry: Issues in Product Representation

April 1, 2004
Author(s)
Ram D. Sriram
Slides presented at the Innovative Design of Complex Aerospace Systems Workshop at held at the NASA Langley Research Center in Hampton, Virginia, on March 24, 2004.

Chaotic Scattering and Escape Times of Marginally Trapped Ultracold Neutrons

April 1, 2004
Author(s)
Kevin Coakley, J M. Doyle, S N. Dzhosyuk, L Yang, Paul R. Huffman
We compute classical trajectories of Ultracold neutrons (UCNs) in a superconducting Ioffe-type magnetic trap using a symplectic integration method. We find that the computed escape time for a particular set of initial conditions (momentum and position)

Characteristics of Fire Scenarios in Which Sublethal Effects of Smoke Are Important

April 1, 2004
Author(s)
Richard D. Peacock, Jason D. Averill, Paul A. Reneke, Walter W. Jones
A number of simulations were performed using the CFAST zone fire model to predict the relative times at which smoke inhalation and heat exposure would result in incapacitation. Fires in three building types were modeled: a ranch house, a hotel, and an

Comparative Specular X-Ray Reflectivity, Positron Annihilation Lifetime Spectroscopy, and Incoherent Neutron Scattering Measurements of the Dynamics in Thin Polycarbonate Films

April 1, 2004
Author(s)
Christopher L. Soles, Jack F. Douglas, Wen-Li Wu, H G. Peng, D W. Gidley
The manner in which the dynamics of a polymer are affected by thin film confinement is one of technological significance, impacting thin film applications such as lubricants, adhesives, and chemically amplified photoresists. In this manuscript we use

Comparing the Transient Response of a Resistive-Type Sensor With a Thin Film Thermocouple During the Post-Exposure Bake Process

April 1, 2004
Author(s)
Kenneth G. Kreider, D P. DeWitt, J B. Fowler, J E. Proctor, William A. Kimes, Dean C. Ripple, Benjamin K. Tsai
Recent studies on dynamic temperature profiling and lithographic performance modeling of the post-exposure bake (PEB) process have demonstrated that the rate of heating and cooling may have an important influence on resist lithographic response. Generally

Dental Composites Based on Hybrid and Surface-Modified Amorphous Calcium Phosphates

April 1, 2004
Author(s)
Drago Skrtic, Joseph M. Antonucci, E D. Eanes, Naomi Eidelman
The objectives of this study were to examine the feasibility of preparing hybrid and surface-modified amorphous calcium phosphates (ACP) as fillers for mineral-releasing dental composites and determine whether the mechanical strength of the composites

Dipole Moment of a Pb-O Vacancy Pair in PbTiO 3

April 1, 2004
Author(s)
Eric J. Cockayne, Benjamin P. Burton
The polarization of a nearest-neighbor (nn) Pb-O vacancy pair in PbTiO3 is calculated, using the modern theory of polarization, implemented in the density functional theory ultrasoft pseudopotential formalism. The dipole moment per divacancy is about 2.228

Dynamic Mechanical Analysis of Pure Mg and Mg AZ31 Alloy

April 1, 2004
Author(s)
A -. Munitz, D -. Dayan, David J. Pitchure, Richard E. Ricker
Dynamic mechanical analyses were performed on pure Mg and Mg AZ31 alloy to study the impact of thermo-mechanical state and grain structure on the complex modulus (E*=E'+iE). The storage modulus (E') of pure Mg was found to be (40.0+2.5) GPa and indpendent

Enterprise Simulation: A Hybrid System Approach

April 1, 2004
Author(s)
Luis C. Rabelo, M Helal, Hyeung-Sik Min, Albert T. Jones
Manufacturing enterprise decisions can be classified into four groups: business decisions, design decisions, engineering decisions, and production decisions. Numerous physical and software simulation techniques have been used to evaluate specific decisions

Fire Safety of Passenger Trains. Phase 3. Evaluation of Fire Hazard Analysis Using Full-Scale Passenger Rail Car Tests (NISTIR 6563)

April 1, 2004
Author(s)
Richard D. Peacock, Jason D. Averill, Daniel M. Madrzykowski, D W. Stroup, Paul A. Reneke, Richard W. Bukowski
Fire safety is an area of particular interest for both conventional intercity and commuter passenger trains, and new high-speed trains. A systems approach to fire safety addresses passenger rail car design and materials, detection and suppression

Forensic Software Testing Support Tools: Test Summary Report

April 1, 2004
Author(s)
Elizabeth N. Fong, Serban I. Gavrila
The Computer Forensic Tool Testing (CFTT) project at the National Institute of Standards and Technology (NIST), an agency of the United States Department of Commerce, provides a measure of confidence in the software tools used in computer forensic
Displaying 39076 - 39100 of 73830
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