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Displaying 22301 - 22325 of 143780

Polarized Light Scattering of Smoke Sources and Cooking Aerosols

October 1, 2017
Author(s)
Thomas Cleary, Amy Mensch
Light scattering data was gathered during experiments conducted in an ANSI/UL 217 test room constructed at NIST to assess the performance of currently available smoke alarms. Smoldering and flaming fires along with cooking experiments were conducted. The

Wireless Infrastructure M2M Network For Distributed Power Grid Monitoring

October 1, 2017
Author(s)
Hamid Gharavi
With the massive integration of distributed renewable energy sources (RESs) into the power system, the demand for timely and reliable network quality monitoring, control, and fault analysis is rapidly growing. Following the successful deployment of Phasor

Supplement 2 to the 2004 update of the AAPM Task Group No. 43 1 Report: Joint recommendations by the AAPM and GEC-ESTRO

September 30, 2017
Author(s)
Michael G. Mitch, Mark J. Rivard, Facundo Ballester, Wayne M. Butler, Larry A. DeWerd, Geoffrey S. Ibbott, Christopher Melhus
Since publication of the 2004 update to the American Association of Physicists in Medicine (AAPM) Task Group No. 43 Report (TG-43U1) and its 2007 supplement (TG-43U1S1), several new low- energy photon-emitting brachytherapy sources have become available

Temperature dependence of nonlinearity in high-speed, high-power photodetectors

September 30, 2017
Author(s)
Josue Davila-Rodriguez, Holly Leopardi, Tara Fortier, Xiaojun Xie, Joe C. Campbell, James Booth, Nate Orloff, Scott Diddams, Franklyn Quinlan
We present an experimental study of the nonlinearity of modified uni-traveling carrier (MUTC) photodiodes at cryogenic temperatures. At 120 K, the amplitudeto-phase (AM-to-PM) conversion nonlinearity is reduced by up to 10 dB, resulting in nearly 40 dB AM

The Role of Filtering Higher Order Reflections in Antenna Extrapolation Measurements

September 30, 2017
Author(s)
Rob Horansky, Mohit S. Mujumdar, Dylan Williams, Kate Remley, David R. Novotny, Michael H. Francis
With more and more wireless devices being made with no test ports, and with the need to test these devices in real-world scenarios with no cable interference, over-the-air (OTA) testing has been dominating the test and manufacture industry. At NIST, we are

Alexa, Can I Trust You?

September 29, 2017
Author(s)
Judy Chung, Michaela Iorga, Jeff Voas, Sangjin Lee
Security diagnostics expose vulnerabilities and privacy threats that exist in commercial Intelligent Virtual Assistants (IVA)-- diagnostics offer the possibility of securer IVA ecosystems. This paper explores security and privacy concerns with these

Nanostructural Evidence of Mechanical Aging and Performance Loss in Ballistic Fibers

September 29, 2017
Author(s)
John Howarter, Ming Liu, Walter G. McDonough, Christopher Soles, Gale A. Holmes
It is understood that the ballistic resistance of aromatic polyamide fibers is related to the fiber's ultimate tensile strength, strain-to-failure, and Young's modulus. Ideal high-performance ballistic materials maximize these properties while minimizing
Displaying 22301 - 22325 of 143780
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