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Displaying 1076 - 1100 of 1184

Sideband cooling of micromechanical motion to the quantum ground state

July 6, 2011
Author(s)
John Teufel, Tobias Donner, Dale Li, Michael S. Allman, Katarina Cicak, Adam Sirois, Jed D. Whittaker, Konrad Lehnert, Raymond Simmonds
… of the membrane motion to a phonon occupation of 0.34 ± 0.05 phonons, we perform a near-Heisenberg-limited position …

Magnetization Reversal Mechanisms in Heusler Alloy Spin Valves

March 29, 2011
Author(s)
T. P. Ginley, Julie Borchers, Brian Kirby, Cindi L. Dennis, Matthew J. Carey, J. R. Childress
Ferromagnetic layers composed of Heusler alloys, which are predicted to be 100% spin polarized in bulk, have been incorporated into spin-valve sensors to improve performance. Transport studies of spin valves containing Co 2MnGe (CMG) in the free and pinned

Effects of Addition of Mannitol Crystals on the Porosity and Dissolution Rates of a Calcium Phosphate Cement

August 1, 2010
Author(s)
Debra Vazquez, Shozo Takagi, Stanislav Frukhtbeyn, Laurence Chow
… microporosity, and adding 50 mass% mannitol produced 54.7 0.8 vol% macroporosity and 21.1 0.4 vol% microporosity. The … mannitol incorporation were (30.6 3.4, 44.8 10.2, and 54.7 3.6, respectively) g cm-2 min-1, or (0.018 0.002, 0.032 … mass% or 50 mass% mannitol into CPC significantly (p < 0.05) increased CPC dissolution rates. Adding mannitol readily …

MEMS Parallel Plate Rheometer for Oscillatory Shear Micro Rheology Measurements

December 11, 2009
Author(s)
Gordon Christopher, Nicholas G. Dagalakis, Steven D. Hudson, Kalman D. Migler
Growing numbers of applications including proteomics, cosmetics, and thin film coatings use novel viscoelastic materials that derive their rheological properties from micro scale structure created by the inclusion of long chain molecules, nano particles

Strong, Macroporous, and in Situ-Setting Calcium Phosphate Cement Layered Structures

May 26, 2007
Author(s)
Hockin D. Xu, Lisa E. Carey, Elena F. Burguera
… S, (mean sd; n = 6) of CPC-scaffold decreased from (9.7 1.2) MPa to (1.8 0.3) MPa (p < 0.05), when the porosity increased from 44.6 % to 66.2 %. … with a strong-layer reinforcement, S increased to (25.2 6.7) MPa and (10.0 1.4) MPa, respectively, at these two …

Thermal and Flammability Properties of Polypropylene/Carbon Nanotube Nanocomposites

May 1, 2004
Author(s)
Takashi Kashiwagi, E A. Grulke, J N. Hilding, Richard H. Harris Jr., John R. Shields, Kathryn M. Butler, K M. Groth, S B. Kharchenko, Jack F. Douglas
The thermal and flammability properties of polypropylene/multi-walled carbon nanotube, (PP/MWNT) nanocomposites were measured with the MWNT content varied from 0.5 % to 4 % by mass. Dispersion of MWNTs in these nanocomposites was characterized by SEM and

Ultracold Atom Collisions Probed With Ultrashort Laser Pulses

February 1, 2000
Author(s)
F K. Fatemi, Kevin Jones, Paul D. Lett
Photoassociation, the light-assisted formation of molecules, has become a powerful tool for studying weakly bound molecules, and for extracting atomic properties with high resolution. However, few experiments have focused on the dynamics of these

The Conversion of SURF II to SURF III

April 2, 1999
Author(s)
Mitchell L. Furst, R M. Graves, A D. Hamilton, L R. Hughey, R P. Madden, Robert E. Vest, W S. Trzeciak, L Greenler, P Robl, D Wahl
The Electron and Optical Physics Division of the Physics Laboratory has operated the Synchrotron Ultraviolet Radiation Facility (SURF) at the National Institute of Standards and Technology (NIST) for over 30 years. Initially operated in a parasitic mode at

Electromagnetic Signal Attenuation in Construction Materials

October 1, 1997
Author(s)
William C. Stone
Laboratory studies of electromagnetic (EM) signal propagation through construction materials were carried out as part of the NIST initiative in Non-Line-of-Sight surveying technology. From these data it is possible to determine several important material
Displaying 1076 - 1100 of 1184
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