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Displaying 22326 - 22350 of 143780

A Methodology for Estimating Seismic Retrofit Costs

September 28, 2017
Author(s)
Juan F. Fung, David T. Butry, Siamak Sattar, Steven L. McCabe
Presidential Executive Order 13717 (EO 13717), Establishing a Federal Earthquake Risk Management Standard, encourages federal agencies to ”enhance resilience...[to] future earthquakes” by evaluating and retrofitting existing federal buildings based on

Aperture Arrays for Subnanometer Calibration of Optical Microscopes

September 28, 2017
Author(s)
Craig Copeland, Craig McGray, Jon Geist, James Alexander Liddle, Robert Ilic, Samuel Stavis
We fabricate and test subresolution aperture arrays as calibration devices for optical localization microscopy. An array pitch with a relative uncertainty of approximately three parts in ten thousand enables magnification calibration with subnanometer

Deep Silicon Etching for X-Ray Diffraction Devices Fabrication

September 28, 2017
Author(s)
Houxun Miao, Mona Mirzaeimoghri, Lei Chen, Han Wen
We report deep reactive ion etching of silicon gratings via cryogenic and Bosch processes. An aspect ratio of > 50 is achieved for 400 nm period gratings with both processes.

Double-shear tests of high-strength structural bolts at elevated temperatures

September 28, 2017
Author(s)
Rafaela Peixoto, Mina S. Seif, Luiz Vieira
The behavior of high-strength structural steel at elevated temperatures, especially under shear loading, is not well established in the literature. This paper presents results from recently conducted tests on high-strength structural bolts subject to

Framework for Cyber-Physical Systems: Volume 3, Timing Annex

September 28, 2017
Author(s)
David A. Wollman, Marc A. Weiss, YaShian Li-Baboud, Edward R. Griffor, Martin J. Burns
Cyber-Physical Systems (CPS) comprise interacting digital, analog, physical, and human components engineered for function through integrated physics and logic. NIST established the CPS Public Working Group (CPS PWG) to bring together a broad range of CPS

Identifying Evidence for Implementing a Cloud Forensic Analysis Framework

September 28, 2017
Author(s)
Changwei Liu, Anoop Singhal, Duminda Wijesekera
Cloud computing provides several benefits to organizations such as increased flexibility, scalability and reduced cost. However, it provides several challenges for digital forensics and criminal investigation. Some of these challenges are the dependence of

Local structural distortions in strained BaSrTiO3 thin films

September 28, 2017
Author(s)
Joseph C. Woicik, Eric L. Shirley, Keith Gilmore, K E. Andersen, C S. Hellberg
The local atomic structures in Ba0.5Sr0.5TiO3 thin films grown on MgO(001) substrates have been determined by density functional theory calculations and Ti K-edge x-ray absorption fine-structure measurements. Films with either c > a or c
Displaying 22326 - 22350 of 143780
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