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Displaying 49601 - 49625 of 74106

Collisions of Cold Magnesium Atoms in a Weak Laser Field

June 1, 1999
Author(s)
M Machholm, Paul S. Julienne, K A. Suominen
We calculate the laser-induced collisional loss of laser-cooled and trapped magnesium atoms for detunings up to 30 atomic linewidths to the red of 1S O -> 1P 1 cooling transition. Magnesium is an excellent test case for theoretical studies, because it can

Coplanar Transmission Lines with Meandering Center Conductors in Y-Ba-Cu-O/Au Bilayers

June 1, 1999
Author(s)
C Weber, Ronald H. Ono, James Booth, Leila R. Vale, Samuel Benz, A. M. Klushin, H. Kohlstedt, R. Semerad
We have investigated both conventional and meandering coplanar microwave transmission lines patterned in Y-Ba-Cu-O/Au bilayers on yttria-stablized zirconia and sapphire substrates. Within the meandering waveguides, the gentre conductor was deformed from a

Crossover Behavior in Dilute Polymer Solutions: Square-Well Chains

June 1, 1999
Author(s)
L L. Lue, S B. Kiselev
Monte Carlo simulations for model polymer chains composed of hard spheres with square-well attractions were performed to find a precise relation between the parameters of a crossover theory and the parameters of the square-well chain.

Cyclic Voltammetry on Ag(111) and Ag(100) Faces in Sodium Hydroxide Solutions

June 1, 1999
Author(s)
B M. Jovic, V D. Jovic, Gery R. Stafford
The electrochemical behavior of silver (100) and (111) single crystal surfaces was examined in aqueous NaOH solution. The first step of silver oxidation is the electrosorption of OH- ions followed by phase transformation into a monolayer. The difference in

Defining Flashover for Fire Hazard Calculations

June 1, 1999
Author(s)
Richard D. Peacock, Paul A. Reneke, Richard W. Bukowski, Vyto Babrauskas
As the use of performance-based methods for evaluating the fire behavior of materials and systems becomes more widespread, objective criteria to judge fire behavior become more important. This paper reviews techniques for predicting the most common of

Delivery of an Advanced Double-Hull Ship Welding System using RoboCrane

June 1, 1999
Author(s)
Roger V. Bostelman, Adam S. Jacoff, Robert Bunch
The Office of Naval Research has sponsored a collaborative effort between the Naval Surface Warfare Center Carderock Division, Advanced Technology and Research Corporation, Newport News Shipbuilders, the National Institute of Standards and Technology (NIST

Detection of p53 Gene Mutation: Analysis by Single-Strand Conformation Polymorphism and Cleavase Fragment Length Polymorphism

June 1, 1999
Author(s)
C D. O'Connell, Donald H. Atha, M C. Oldenburg, J Tian, M Siebert, D Handrow, K Grooms, L Heisler, M de Arruda
We have generated a collection of clones containing single point mutations within the exon 5-9 hot spot regions of the p53 gene by using polymerase chain reaction (PCR) to amplify select regions of the gene from characterized cell lines. These clones were

Dimensional Metrology with the NIST Calibrated Atomic Force Microscope

June 1, 1999
Author(s)
Ronald G. Dixson, R Koning, V W. Tsai, Joseph Fu, Theodore V. Vorburger
Atomic force microscopes (AFMs) are increasingly used in the semiconductor industry as tools for submicrometer dimensional metrology. The scales of an AFM must be calibrated in order to perform accurate measurements. We have designed and developed the

Dynamic Contact Angle of a Liquid Spreading on a Heated Plate

June 1, 1999
Author(s)
Dean C. Ripple
An equation determining the steady-state profile of a liquid meniscus advancing or receding across a heated plate is derived. The effects of liquid evaporation, intermolecular interaction with the plate, and thermocapillarity are included. Numerical and

Dynamic Partitioning of Neutral Polymers into a Single Ion Channel

June 1, 1999
Author(s)
S. M. Bezrukov, John J. Kasianowicz
Polymers partitioning into highly confined spaces can be studied using single nanometer-scale pores formed by protein ion channels. The ionic conductance of a channel depends on the state of occupancy of the pore by polymer and serves as a measure of

Electrostriction of Near-Critical SF 6 in Microgravity

June 1, 1999
Author(s)
G A. Zimmerli, R A. Wilkinson, R A. Ferrell, Michael R. Moldover
We used interferometry to measure the electric-field-induced (I.e., electrostrictive) increase of the density of sulfur hexafluoride near its critical point. The results at the temperatures T c + 5 mK, T c + 10 mK, and T c + 30 mK, with T c = 319 K, agree

Embedded Systems, The Forgotten Y2K Problem

June 1, 1999
Author(s)
G E. Fisher
Much has been written about embedded systems and how they will be affected by the year 2000 problem. During the first 6 months of 1999, a significant amount of conflicting information was spread about the outlook for fixing systems that rely on embedded
Displaying 49601 - 49625 of 74106