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Displaying 2501 - 2525 of 143796

Interpretation and Report Writing in Forensic Comparisons of Paint Evidence: An Inter-laboratory Exercise

June 21, 2023
Author(s)
Donna J. Sirk, Andria Mehltretter, Meghan Prusinowski, Hal Arkes, David Flohr, Cedric Neumann, Scott Ryland, Tatiana Trejos
This interlaboratory study evaluated a guide for interpreting and reporting trace evidence examinations. The online survey aimed to assess the examiners' interpretation of casework scenarios designed by a subject matter expert panel (SMEP), specifically

Quantum-limited optical time transfer for future geosynchronous links

June 21, 2023
Author(s)
Emily Caldwell, Jean-Daniel Deschenes, Jennifer Ellis, William C. Swann, Benjamin Stuhl, Hugo Bergeron, Nathan R. Newbury, Laura Sinclair
The combination of optical time transfer and optical clocks opens up the possibility of large-scale free-space networks that connect both ground-based optical clocks and future space-based optical clocks. Such networks promise better tests of general

2022 NIST Summary of U.S. Legal Metrology Activities

June 20, 2023
Author(s)
Lisa Warfield, Tina G. Butcher, Richard A. Harshman, Jan Konijnenburg, Gloria Diane Lee, David Sefcik, Juana Williams, Katrice Lippa
The NIST Office of Weights and Measures (OWM) presents its first report 2022 NIST Annual Summary of U.S. Legal Metrology Activities report. This report includes a summary of changes made to NIST Handbook 44 (2021) Specifications, Tolerances and Other

Procedure Overhaul at the NIST Center for Neutron Research

June 19, 2023
Author(s)
Brandy Frie, David Griffin, James R. Whipple
The National Institute of Standards and Technology (NIST) Center for Neutron Research operates a 20 MW research reactor whose primary purpose is to produce cold neutrons for material sciences experiments. On February 3rd, 2021, a fuel element was unlatched

What limits the voltage of GaAs photovoltaic devices under low indoor light?

June 19, 2023
Author(s)
Behrang Hamadani, Margaret Stevens, Matthew Lumb, Kenneth Schmieder
The external radiative efficiency of a photovoltaic device is a useful metric to compare different photovoltaic technologies and material systems. However, under low-intensity indoor lighting, a particular open-circuit voltage dependence arises that cannot

Alternative Reflectors for The NIST Neutron Source

June 18, 2023
Author(s)
Yaniv Shaposhnik, Osman Celikten, Jeremy Cook, Abdullah Weiss, Dagistan Sahin
A conceptual design of a replacement reactor at the NIST Center for Neutron Research (NCNR), referred to as the NIST Neutron Source (NNS), is underway in collaboration with the Brookhaven National Laboratory. The NNS reactor design favors the production of

Lessons Learned on NBSR Licensing Actions

June 18, 2023
Author(s)
Dagistan Sahin, Thomas H. Newton, Steven Dewey, Osman Celikten, Paul C. Brand, Lap-Yan Cheng
After the incident in February 2021, NBSR implemented three license amendment requests (LAR) to allow the restart of the reactor. The first LAR was to modify previous latch verification requirements in the Technical Specifications (TS). Originally TS

A non-defect precursor gate oxide breakdown model

June 16, 2023
Author(s)
Kin (Charles) Cheung
Understanding defect creation is central to efforts to comprehend gate dielectric breakdown in metal-oxide-semiconductor-field-effect-transistors (MOSFETs). While gate dielectrics other than SiO2 are now popular, models develop for SiO2 breakdown are used
Displaying 2501 - 2525 of 143796
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