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Displaying 29576 - 29600 of 74303

The Journal Of Physical and Chemical Reference Data

October 16, 2008
Author(s)
M W. Chase
The Journal of Physical and Chemical Reference Data (JPCRD), a joint venture of the AmericanInstitute of Physics and the National Institute of Standards and Technology, was first published in 1972. The participation of these organizations is a recognition

The Ne II Spectrum

October 16, 2008
Author(s)
Alexander Kramida, Gillian Nave
Spectra of neon-filled hollow cathode discharge lamps were observed by means of high-resolution Fourier-transform spectroscopy (FTS) covering the region from vacuum ultraviolet to near infrared. By combining these new measurements with results of other FTS

The New MOU

October 16, 2008
Author(s)
K J. Leuteritz
This article describes the changes that were made to the ANSI-NIST MOU which was revised and signed on 9/22/98. ANSI is the American National Standards Institute.

The New NIST Water Flow Calibration Facility

October 16, 2008
Author(s)
V S. Gowda, Tsyh Tyan Yeh, Pedro I. Espina, N Yende
A static-gravimetric liquid flow calibration facility is under construction at the NIST Gaithersburg Campus. The facility is designed to calibrate flow meters from 25 mm to 400 mm in diameter, at flow rates from 8 L/min to 38,000 L/min. It incorporates a

The NIST Rotating Braille Reader for Electronic Books

October 16, 2008
Author(s)
John W. Roberts, V R. McCrary
¿¿¿We have developed a new technology to reduce the cost of Braille-based information accessibility. Millions of blind and visually impaired people in the US (and far higher numbers worldwide) need some form of non-visual access to information. The

The NIST Standards in Trade Program

October 16, 2008
Author(s)
P L. Heydemann
Plans, organizes, and manages the placement of technical experts from NIST, or selected by NIST, in key U.S. embassies and missions to provide technical advice and support to commercial and economic staffs in the identification and resolution of trade

The Nuts and Bolts and Results of Fluorine Bomb Calorimetry

October 16, 2008
Author(s)
P A. O'Hare
The technique of fluorine bomb calorimetry is outlined with special emphasis on the experimental methods, including the construction of the reaction vessel and manifold for operations with F 2. A detailed description is included of a determination of the

The Periodic Table of Damping in Doped Ni 80 Fe 20 Thin Films

October 16, 2008
Author(s)
J O. Rantschler, D Pulugurthaand, Andrew P. Chen, L M. Connors, Audie M. Castillo, Alexander J. Shapiro, William F. Egelhoff Jr., Brian B. Maranville, Robert D. McMichael
The effect of doping on the magnetic damping parameter of Ni80Fe20 is measured for 21 transition metal dopants:Ti, V, Cr, Mn, Co, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Pt, and Au. For most of the dopants, the damping parameter increases

The Realization and the Dissemination of Thermodynamic Temperature Scales

October 16, 2008
Author(s)
Howard W. Yoon
Since the establishment of the International Temperature Scale of 1190 (ITS-90), much progress has been made in the development of radiometers and blackbody sources. Cryogenic electrical-substitution radiometry is widely used in detector and radiometer

The role of Lagrange multipliers in variational atomic structure calculations

October 16, 2008
Author(s)
C F. Fischer, Y Ralchenko
The importance of Lagrange multipliers in variational atomic structure calculations is discussed. Though in some instances they may not affect the energy associated with the wave function, they have a direct effect on the orbitals which may have subsequent

The Si-Route to the Avogadro Constant: Latest Measurements on Natural Silicon; Highly Enriched 28 Si Is Next

October 16, 2008
Author(s)
P De Bievre, S Valkiers, P D. Taylor, P Becker, H Bettin, U Kuetgens, A Nicolaus, H U. Danzebrink, K Fujii, A Waseda, Giovanni Mana, A Peuto, M J. Kenny, A J. Leistner, R Kessel, G Zosi, A Picard, F Spaepen, H Riemann, H S. Peiser
New measurements of the molar volume and lattice parameter of natSi, in near-perfect Si crystals, are reported. The present determination confirms the previously published value of the Avogadro constant within the stated uncertainty. all relevant

The Superconductive Critical Magnetic Field of Beryllium

October 16, 2008
Author(s)
Robert J. Soulen, J H. Colwell, William E. Fogle
We have measured the temperature dependence of the superconductive critical magnetic field of several samples of beryllium from three different sources. The data were well represented by the BCS model of superconductivity. The values of T c and H c(O) were

The Upper Critical Magnetic Field of a Superconductor as a Function of Disorder

October 16, 2008
Author(s)
Robert J. Soulen, M. S. Osofsky, G T. Woods, William F. Egelhoff Jr.
We have observed a dramatic enhancement of H c2 in the system, Nb 1-x Si x, as a function of disorder. To account for these empirical results, we incorporate expressions derived previously for T and N as a function of disorder into the GLAG equation for H

Theory of Curvature and Grooving Effects in DIGM I: The Physics

October 16, 2008
Author(s)
John W. Cahn, O Penrose
We take the formulation of steady-state diffusion-induced grain boundary motion from our earlier work [1], and combine it with the results of Mullins' theory for surface grooves from steadily moving grain boundaries, to formulate a theory of DIGM in thin

Thermal Plasma Synthesis of Magnetic Nanoparticles

October 16, 2008
Author(s)
J H. Scott, S. A. Majetich, Z Turgut, M E. McHenry, K Chowdary, M I. Boulos
A scalable synthesis route for the production of bare and carbon-coated metal nanoparticles is presented. Magnetic nanoparticles composed of pure Fe, pure Co, and FeCo alloys ranging from Fe 50Co 50 to Fe 75Co 25 are produced using a radio frequency (RF)
Displaying 29576 - 29600 of 74303