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Displaying 47601 - 47625 of 143796

Defining Common Reference Channels for Geostationary Infrared Imagers

December 31, 2010
Author(s)
Tim Hewison, Ruediger Kessel
This article follows up the theoretical considerations presented above with an example applied to the infrared channels of geostationary imagers. The uncertainties, u(deltaLr), introduced by the process of spectral conversion to Common Reference Channels

Evaluating self-declared ancestry of U.S. Americans using autosomal, Y-chromosomal and mitochondrial DNA

December 31, 2010
Author(s)
Peter Vallone, Oscar Leo, Manfred Kayser, Mannis van Oven, Michael Coble, Toni M. Diegoli, Kristiaan J. van der Gaag, Peter D. Knijff
The current U.S. population represents an amalgam of individuals from different biogeographic ancestries who arrived on the territory at different times in the history of the territory. However, such admixture is far from being homogeneous and this fact

Time-resolved radiation beam profiles in water obtained by ultrasonic tomography

December 31, 2010
Author(s)
Eugene Malyarenko, Joseph Heyman, Heather H. Chen-Mayer, Ronald Tosh
This paper presents a practical ultrasonic system for near real-time imaging of spatial temperature distributions in water caused by absorption of radiation. Initial testing with radiation from a highly attenuated infrared lamp demonstrates that the system

Development of a Four-channel System for Johnson Noise Thermometry

December 30, 2010
Author(s)
Alessio Pollarolo, Chiharu Urano, Paul Dresselhaus, Jifeng Qu, Horst Rogalla, Samuel Benz
Long integration time is necessary to reach low uncertainty when measuring temperature through Johnson Noise Thermometry (JNT). The main goal of the NIST JNT experiment is to achieve a 6×10-6 relative uncertainty in the measurement of the water triple

Effects of Polymeric Nanogratings on Cell Orientation

December 30, 2010
Author(s)
Nancy J. Lin, Sheng Lin-Gibson, Jirun Sun, Yifu Ding
Surface topography is known to play a critical role in the biological response to materials, with surface features on the order of both microns and nanometers altering cell response, including morphology, adhesion, cytoskeletal orientation, and gene

A 10 mK Scanning Probe Microscopy Facility

December 29, 2010
Author(s)
Young J. Song, Alexander F. Otte, Steven R. Blankenship, Alan H. Band, Frank M. Hess, Young Kuk, Vladimir Shvarts, Zuyu Zhao, Joseph A. Stroscio
We describe the design, development and performance of a scanning probe microscopy (SPM) facility operating at a base temperature of 10 mK in magnetic fields up to 15 T. The microscope is cooled by a custom designed, fully ultra-high vacuum (UHV)

Guidelines for the Secure Deployment of IPv6

December 29, 2010
Author(s)
Sheila E. Frankel, Richard Graveman, John Pearce, Mark Rooks
Due to the exhaustion of IPv4 address space, and the Office of Management and Budget (OMB) mandate that U.S. federal agencies begin to use the IPv6 protocol, NIST undertook the development of a guide to help educate federal agencies about the possible
Displaying 47601 - 47625 of 143796
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