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Search Publications

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Displaying 46101 - 46125 of 143775

Semiclassical Boltzmann transport theory for graphene multilayers

May 11, 2011
Author(s)
Hongki Min, Parakh Jain, Shaffique Adam, Mark D. Stiles
We calculate the conductivity of arbitrarily stacked multilayer graphene sheets within a relaxation time approximation by considering both short-range and long-range impurities. We investigate theoretically the feasibility of identifying the stacking order

Simulation and Analysis for Sustainability in Manufacturing Processes

May 11, 2011
Author(s)
Mahesh Mani, Kevin W. Lyons, Alexander P. Muroyama, Bjorn J. Johansson
Sustainability has become a ubiquitous term in almost every field, especially in engineering design and manufacturing. Recently, an increased awareness of environmental problems and resource depletion has led to an emphasis on environmentally friendly

Field-test of a robust, portable, frequency-stable laser

May 10, 2011
Author(s)
David R. Leibrandt, Michael J. Thorpe, James C. Bergquist, Till P. Rosenband
We operate a frequency-stable laser in a non-laboratory environment where the test platform is a passenger vehicle. We measure the acceleration experienced by the laser and actively correct for it to achieve a system acceleration sensitivity of df/f = 11(2

Phase-coherent detection of an optical dipole force by Doppler velocimetry

May 10, 2011
Author(s)
Michael J. Biercuk, Hermann Uys, Joseph W. Britton, Aaron Vandevender, John J. Bollinger
We report phase-coherent Doppler detection of optical dipole forces using large ion crystals in a Penning trap. The technique is based on laser Doppler velocimetry using a cycling transition in 9Be+ near 313 nm and the center-of-mass (COM) ion motional

Progress on CD-AFM tip width calibration standards

May 10, 2011
Author(s)
Ronald G. Dixson, Boon Ping Ng, Craig D. McGray, Ndubuisi G. Orji, Jon C. Geist
The National Institute of Standards and Technology (NIST) is developing a new generation of standards for calibration of CD-AFM tip width. These standards, known as single crystal critical dimension reference materials (SCCDRM) have features with near

Re-optimized energy levels and Ritz wavelengths of 198Hg I

May 10, 2011
Author(s)
Alexander Kramida
Energy levels and observed spectral lines of 198Hg I were recently compiled at the National Institute of Standards and Technology (NIST) [E. B. Saloman, J. Phys. Chem. Ref. Data 35, 1519 (2006)]. In that compilation, the energy level values were optimized

Characterization of the Range Performance of a 3D Imaging System (NIST TN 1695)

May 9, 2011
Author(s)
Geraldine S. Cheok, Kamel S. Saidi, Marek Franaszek, James J. Filliben, Nicholas Scott
A 3D imaging instrument is a non-contact measurement instrument used to rapidly obtain 3D information about a scene or object. The use of and the applications for these instruments have grown tremendously in the last decade. The expanded use of 3D imaging

Dual-wavelength transfer standard for laser peak-power measurement

May 9, 2011
Author(s)
Rodney W. Leonhardt, Daniel King
The National Institute of Standards and Technology (NIST) and the Naval Surface Warfare Center – Corona Division (NSWC) have jointly developed a low-level peak-power radiometer (D-ESR) which functions as a transfer standard for measuring laser pulses at

Improving Fatigue Strength of Alumina through Surface Grading

May 9, 2011
Author(s)
Yvonne B. Gerbig, Linlin Ren, Lela Liu, Sanjit Bhowmick, Malvin Janal, Van Thompson, Yu Zhang
Porcelain veneered alumina crown restorations often fail from bulk fracture resulting from radial cracks that initiate at the cementation surface with repeated flexure of the stiffer crown layers on the soft dentin support. We hypothesize that bulk

Neutron Reflectometry and QCM-D Study of the Interaction of Cellulases with Films of Amorphous Cellulose

May 9, 2011
Author(s)
Gang Cheng, Zelin Liu, Jaclyn K. Murton, Michael Jablin, Manish Dubey, Jaroslaw Majewski, Candice Halbert, James Browning, John F. Ankner, Bulent Akgun, Chao Wang, Alan R. Esker, Kenneth L. Sale, Blake. Simmons, Michael S. Kent
Improving the efficiency of enzymatic hydrolysis of cellulose is one of the key technological hurdles to reduce the cost of producing ethanol and other transportation fuels from lignocellulosic material. A better understanding of how soluble enzymes
Displaying 46101 - 46125 of 143775
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