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NIST Authors in Bold

Displaying 1576 - 1600 of 2915

Assessment of intra-build variations in tensile strength in electron beam powder-bed fusion Ti-6Al-4V part 1: Effects of build height

June 2, 2022
Author(s)
Nicholas Derimow, Alejandro Romero, Aldo Rubio, Cesar Terrazas, Newell Moser, Orion Kafka, Jake Benzing, Francisco Medina, Ryan Wicker, Nik Hrabe
In this work, rectangular blocks of electron beam powder-bed fusion (PBF-EB) additively manufactured (AM) Ti-6Al-4V were built, such that a total of 68 mini-tensile test coupons could be extracted for mechanical testing over a range of build height and

Embedding a Rydberg Atom-Based Sensor into an Antenna for Phase and Amplitude Detection of Radio Frequency Fields and Modulated Signals

October 22, 2019
Author(s)
Christopher L. Holloway, Matthew T. Simons, Abdulaziz H. Haddab, Joshua A. Gordon, David R. Novotny
We demonstrate a Rydberg atom-based sensor embedded in a parallel-plate waveguide (PPWG) for amplitude and phase detection of a radio-frequency (RF) electric field. This embedded atomic sensor is also capable of receiving modulated communications signals

Elastic residual strain and stress measurements and corresponding part deflections of 3D AM builds of IN625 AM-Bench artifacts using neutron diffraction, synchrotron X-ray diffraction, and contour method

July 29, 2019
Author(s)
Thien Q. Phan, Maria Strantza, Michael R. Hill, Thomas H. Gnaupel-Herold, Jarred C. Heigel, Christopher D'Elia, DeWald Adrian, Bjorn Clausen, Darren C. Pagan, J. Y. Peter Ko, Donald W. Brown, Lyle E. Levine
One of the primary barriers for acceptance of additive manufacturing (AM) has been the uncertainty in the performance of AM parts due to residual stresses/strains. The rapid heating and cooling rates, along with the thermal history of the laser melting

High x-ray resolving power (up to 4000) utilizing asymmetric diffraction from a quartz transmission crystal measured in the 6 keV to 22 keV energy range

June 27, 2019
Author(s)
Lawrence T. Hudson, John F. Seely, Eric Galtier, Uri Feldman, Albert Henins
A Cauchois type spectrometer utilizing the (203) lattice planes at an oblique angle of 11.53o to the surface of a quartz transmission crystal recorded the Kα and Kβ spectral lines of six elements from Fe to Ag in the 6 keV to 22 keV energy range from a

Free Space Microwave Non Destructive Characterization of Composite Materials

May 4, 2015
Author(s)
Jan Obrzut, Ahmed M. Hassan, Edward J. Garboczi
We present a free-space microwave experimental measurement system for the non-destructive testing of composite materials. The system operates in the Q- frequency band of 30 GHz to 50 GHz with fixed wave propagation distance between free-space antennas

Non-imaging Winston Cone Concentrators for Submillimeter-wave, Overmoded Waveguide

January 1, 2014
Author(s)
Erich N. Grossman, Oscar D. Friedman, Andrew O. Nelson
We describe the design, simulation, and measured performance of concentrators designed to couple submillimeter wavelength radiation from free space into highly overmoded, rectangular, WR-10 waveguide. They consist of a combination of a Winston cone, (also

Monolayer Formation of PBLG-PEO Block Copolymers at the Air-Water Interface

November 11, 2004
Author(s)
Y Park, Y W. Choi, SK Park, C S. Cho, Michael J. Fasolka, Daeson Sohn
Physicochemical properties of PBLG (poly(gamma-benzyl-L-glutamate))-PEO (poly(ethylene oxide)) diblock copolymers composed of PBLG as the hydrophobic rod component and PEO as the hydrophilic component were investigated at the air-water interface. Surface

Techniques for Primary Acoustic Thermometry to 800 K

September 1, 2003
Author(s)
Dean C. Ripple, Dana R. Defibaugh, Michael R. Moldover, Gregory F. Strouse
The NIST Primary Acoustic Thermometer will measure the difference between the International TemperatureScale of 1990 and the Kelvin Thermodynamic Scale throughout the range 273 K to 800 K with uncertainties of only afew millikelvins. The acoustic

Acoustic Emission of Structural Materials Exposed to Open Flames

December 1, 1992
Author(s)
William L. Grosshandler, M A. Jackson
The use of acoustic emission (AE) as an early indicator of structural materials exposed to a flame has been investigated and found to be possible. Piezoelectric transducers have been mounted directly on 0.5 m long, simply supported beams of aluminum

Acoustic Emission of Structural Materials Exposed to Open Flames

December 1, 1992
Author(s)
William L. Grosshandler, M A. Jackson
The use of acoustic emission (AE) as an early indicator of structural materials exposed to a flame has been investigated and found to be possible. Piezoelectric transducers have been mounted directly on 0.5 m long, simply supported beams of aluminum

The JARVIS Infrastructure is All You Need for Materials Design

July 23, 2025
Author(s)
Kamal Choudhary
The Joint Automated Repository for Various Integrated Simulations (JARVIS) is a unified platform for multiscale, multimodal, forward, and inverse materials design. It integrates diverse theoretical and experimental approaches, including density functional

Quantum-Based Photonic Sensors for Pressure, Vacuum, and Temperature Measurements: A Vison of the Future with NIST on a Chip

September 17, 2021
Author(s)
Jay H. Hendricks, Zeeshan Ahmed, Daniel Barker, Kevin O. Douglass, Stephen Eckel, James A. Fedchak, Nikolai Klimov, Jacob Edmond Ricker, Julia Scherschligt
The NIST on a Chip (NOAC) program's central idea is the idea that measurement technology can be developed to enable metrology to be performed "outside the National Metrology Institute" by the crea-tion of deployed and often miniaturized standards. These

Relationship between Viscosity and Acyl Tail Dynamics in Lipid Bilayers

August 12, 2021
Author(s)
Michihiro Nagao, Elizabeth Kelley, Antonio Faraone, Makina Saito, Yoshitaka Yoda, Masayuki Kurokuzu, Shinichi Takata, Makoto Seto, Paul Butler
Membrane viscosity is a fundamental property that controls molecular transport and structural rearrangements in lipid membranes. Given its importance in many cell processes, various experimental and computational methods have been developed to measure the

NIST on a Chip: Photonic and Quantum-Based Sensors for Measurements of Pressure, Vacuum, Temperature and Beyond!

April 29, 2021
Author(s)
Jay H. Hendricks, Zeeshan Ahmed, Daniel Barker, Stephen Eckel, James A. Fedchak, Nikolai Klimov, Julia Scherschligt
At the core of the NIST on a Chip (NoAC) program is the idea that measurement technology can be developed to enable metrology to be done "outside the National Metrology Institute" by virtue of deployed and often miniaturized standards (that can also serve
Displaying 1576 - 1600 of 2915
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