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Displaying 451 - 475 of 2915

Microstructural Evolution in Lead-Free Solder Alloy. Part II: Directionally Solidified Eutectic Tin-Silver-Copper, Tin-Copper and Tin-Silver Alloys.

October 12, 2021
Author(s)
S L. Allen, M R. Notis, R R. Chromik, Richard P. Vinci, D J. Lewis, Robert J. Schaefer
The tin-silver-copper eutectic is a three-phase eutectic consisting of Ag(sub3)Sn plates and Cu(sub6)Sn(sub 5) rods in a (Sn) matrix. It is thought that the two phases will coarsen independently. Directionally solidified ternary eutectic and binary

Details of the 1998 Watt Balance Experiment Determining the Planck Constant

Author(s)
Richard L. Steiner, David B. Newell, Edwin R. Williams
The National Institute of Standards and Technology (NIST) watt balance experiment completed a determination of Planck's constant in 1998 with a relative standard uncertainty of 87 x 10-9 (k = 1), concurrently with an upper limit on the drift rate of the SI

Analytical and Numerical Analyses for Two-Dimensional Stress Transfer

October 12, 2021
Author(s)
C H. Hsueh, P Becher, Lin-Sien H. Lum, Stephen A. Langer, W Carter
Both analytical modeling and numerical simulations were performed to analyze the stress transfer in platelet-reinforced composites in a two-dimensional sense. In the two-dimensional model, an embedded elongate plate bonded to a matrix along its length

Particulate and Bioaerosols in Dental Facilities

October 12, 2021
Author(s)
Hanu Batchu, Steve Gruninger, Gary E. Schumacher, F Eichmiller, P L. Fan
Particulates and bioaerosols were generated during simulated dental procedures in a dental operatory with 5.5 and 11 air changes per hour. Air sampling of particulates was performed using cassette filters and a laser particle counter. Bioaerosols were

Graphene-metal interconnect: an atomistic simulation

August 11, 2011
Author(s)
Alexander Y. Smolyanitsky, Vinod K. Tewary
… an atomistic simulation of the properties of graphene on nickel surface. The approach is based on the modified … electrical interconnect. The interconnect consists of two nickel contacts and a graphene ribbon (over 11,000 atoms …

Making Zone Plates with a Laser Printer

January 1, 1991
Author(s)
Charles W. Clark, Y N. Demkov
… , Y N. Demkov … American Journal of Physics … Making Zone Plates with a Laser Printer …

A Fundamental Equation for Trifluoromethane (R-23)

December 1, 2003
Author(s)
S G. Penoncello, Eric Lemmon, R. T. Jacobsen, Z Shan
… state, R-23, thermodynamic properties, trifluoromethane … A Fundamental Equation for Trifluoromethane (R-23) …
Displaying 451 - 475 of 2915
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