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Displaying 15401 - 15425 of 73697

Depletion region surface effects in electron beam induced current measurements

September 7, 2016
Author(s)
Paul M. Haney, Heayoung Yoon, Benoit H. Gaury, Nikolai B. Zhitenev
Electron beam induced current (EBIC) is a powerful characterization technique which offers the high spatial resolution needed to study polycrystalline solar cells. Ideally, an EBIC measurement reflects the spatially resolved quantum efficiency of the

Entropy as a Service: Unlocking Cryptography's Full Potential

September 7, 2016
Author(s)
Apostol T. Vassilev, Robert L. Staples
Securing the Internet of Things (IoT) requires strong cryptography, which depends on the availability of good entropy for generating unpredictable keys and accurate clocks. Attacks abusing weak keys or old inputs portend challenges for IoT. EaaS is a novel

Surface plasmon resonance microscopy: achieving a quantitative optical response

September 7, 2016
Author(s)
Alexander Peterson, Michael Halter, Anne Plant, John Elliott
Surface plasmon resonance imaging (SPRI) allows real-time label-free imaging based on index of refraction, and changes in index of refraction at an interface. SPRI can be carried out on a microscope by launching light into a sample, and collecting

Broadband Radiometric LED Measurements

September 6, 2016
Author(s)
George P. Eppeldauer, P. Yvonne Barnes, Howard W. Yoon, Leonard Hanssen, Vyacheslav B. Podobedov, Robert E. Vest, Uwe Arp, C Cameron Miller
At present, broadband radiometric measurements of LEDs with uniform and low-uncertainty results are not available. Currently, either spectral radiometric measurements or broadband photometric LED measurements are used. The broadband photometric

INVESTIGATION OF URBAN ROCK VARNISH ON THE SANDSTONE OF THE SMITHSONIAN CASTLE

September 6, 2016
Author(s)
Richard A Livingston, Carol A. Grissom, Edward Vicenzi, Zoe Weldon-Yochim, Nicole Little, Janet Douglas, Alexandre Fowler, Cara Santelli, Dorothea Macholdt, Diana Ortiz-Montalvo, Stephanie S. Watson
Bluish black, highly adherent patches have been observed growing on the Seneca sandstone of the Smithsonian Castle in Washington, DC. They are significantly enriched in Mn compared to the underlying sandstone, by a factor of 100, which suggests that

NIST Micronutrients Measurement Quality Assurance Program Analysis Tutorial

September 6, 2016
Author(s)
Katherine E. Sharpless, Jeanice M. Brown Thomas, David L. Duewer
Since 1984, the National Institute of Standards and Technology (NIST) has coordinated what is now known as the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat-soluble vitamins and carotenoids in human serum

Trustworthy Email

September 6, 2016
Author(s)
Ramaswamy Chandramouli, Simson L. Garfinkel, J. S. Nightingale, Scott W. Rose
This document gives recommendations and guidelines for enhancing trust in email. The primary audience includes enterprise email administrators, information security specialists and network managers. This guideline applies to federal IT systems and will

An Overview of a Smart Manufacturing System Readiness Assessment

September 5, 2016
Author(s)
Kiwook Jung, Boonserm Kulvatunyou, Sangsu Choi, Michael Brundage
Technologies for creating smart manufacturing systems or factories are becoming increasingly abundant. However, manufacturers, large and small, need to correctly select and prioritize these technology adoptions. In addition, other improvements may be

Optically referenced broadband electronic synthesizer with 15 digits of resolution

September 5, 2016
Author(s)
Franklyn J. Quinlan, Tara M. Fortier, A. Rolland, Frederick N. Baynes, A. J. Metcalf, Archita Hati, Andrew D. Ludlow, Nathan M. Hinkley, M. Shimizu, Joe Campbell, Scott A. Diddams
Increasing demands in the high tech industry for higher data rates and better synchronization necessitates the development of new wideband and tunable sources with improved noise performance over traditional synthesis based quartz oscillators. Precision

Terahertz laser power measurement comparison

September 5, 2016
Author(s)
John H. Lehman, Malcolm G. White, Andreas Steiger, Ralf Mueller, Alberto R. Oliva, Yuqiang Deng, Qing Sun
Abstract: A comparison of terahertz (THz) laser power measurements was undertaken among three national metrology institutes. At two THz frequencies, 2.52 THz (119 µm) and 0.762 THz (394 µm), a power level of approximately 3 mW was compared at one place at

DNA Commission of the International Society for Forensic Genetics: Recommendations on the validation of software programs performing biostatistical calculations for forensic genetics applications

September 4, 2016
Author(s)
Michael D. Coble, John S. Buckleton, John M. Butler, Barbara Guttman
The use of biostatistical software programs to assist in data interpretation and calculate likelihood ratios is essential to forensic geneticists and part of the daily case work flow for both kinship and DNA identification laboratories. Previous
Displaying 15401 - 15425 of 73697
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