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Displaying 6801 - 6825 of 143806

Design Strategy for Additive Manufacturing Ti-Al-Fe alloys with Calculation of Phase Diagram Method

November 1, 2021

Author(s)

Zhi Liang, Ursula R. Kattner, Carelyn E. Campbell

Calculation of Phase Diagram (CALPHAD) method was used to develop an additive manufacturing (AM) titanium alloy design strategy for new alloys in the Ti-Al-Fe system. This design strategy includes five key criteria addressing AM-processing suitability

Evaluating Measurement Uncertainty for Firearm Barrel and Overall Length Measurements

November 1, 2021

Author(s)

Michael Stocker, Theodore V. Vorburger, Thomas Renegar, Robert Thompson, Mark Williford

In recent years, more forensic laboratories are seeking accreditation to ISO 17020 and 17025. In the field of firearm and toolmark forensics, the barrel length and overall length of a firearm are typical measurements performed in the laboratory to

Experiments and Exergy Analysis for a CO2 Ground-Source Heat Pump in Cooling Mode

November 1, 2021

Author(s)

Harrison M. Skye, Wei Wu

A prototype CO2 ground-source air conditioner (GSAC) comprised of a vapor-compression cycle with a liquid-line/suction-line heat exchanger (LLSL-HX) was tested in an environmental chamber per ISO standard 13256 1 for rating liquid-to-air heat pumps. The

Gateless p-n Junction Sharpness in Centimeter-Scale Epitaxial Graphene

November 1, 2021

Author(s)

Albert Rigosi

The Long Road: Advancing First-Generation PBSD for Steel Buildings Part 2 - Case Studies

November 1, 2021

Author(s)

Matthew Speicher, John Harris

This article discusses the results of case studies conducted at NIST to advance first-generation performance-based design procedures in ASCE 41.

Generation of perfect vortex beams by dielectric geometric metasurface for visible light

October 31, 2021

Author(s)

Qianwei Zhou, Mingze Liu, Wenqi Zhu, Lu Chen, Yongze Ren, Henri Lezec, Yanqing Lu, Ting Xu, Amit Agrawal

Perfect vortex beam (PVB) is a propagating optical field carrying orbital angular momentum (OAM) with a radial intensity profile that is independent of topological charge. PVB can be generated through the Fourier transform of a Bessel-Gaussian beam, which

The misunderstood meander: Redesigning meander-line surface coils to reduce noise, increase uniformity, and eliminate image artifacts

October 30, 2021

Author(s)

Gary Zabow, Stephen Dodd, Alan Koretsky

Meander-line, or zig-zag, MRI surface coils theoretically promise spatially uniform fields with optimal field localization close to the coil. In reality, they suffer poorer than expected field localizations and acquired images are often highly

An introductory overview of open-source and commercial software options for the analysis of forensic sequencing data

October 29, 2021

Author(s)

Tuende Huszar, Katherine Gettings, Peter Vallone

The top challenges of adopting new methods to forensic DNA analysis in routine laboratories are often the capital investment and the expertise required to implement and validate such methods locally. In the case of next generation sequencing, in the last

Annual Report on U.S. Manufacturing Industry Statistics: 2021

October 29, 2021

Author(s)

Douglas Thomas

This report provides a statistical review of the U.S. manufacturing industry. There are three aspects of U.S. manufacturing that are considered: (1) how the U.S. industry compares to other countries, (2) the trends in the domestic industry, and (3) the

Fusing an Insoluble Protein to GroEL Apical Domain Enhances Soluble Expression in Escherichia coli

October 29, 2021

Author(s)

Prasad Reddy, William Brad O'Dell

A protocol for increasing soluble protein expression by fusing the chaperone GroEL apical domain with a gene of interest is described herein. GroEL apical domain, the minichaperone that functions independently of GroES and ATP in protein folding, is cloned

Self-Bayesian Aberration Removal via Constraints for Ultracold Atom Microscopy

October 29, 2021

Author(s)

Ian Spielman, Emine Altuntas

High-resolution imaging of ultracold atoms typically requires custom high numerical aperture (NA) optics, as is the case for quantum gas microscopy. These high NA objectives involve many optical elements each of which contributes to loss and light

Using CO2 Monitoring to Manage Ventilation in Buildings

October 29, 2021

Author(s)

Andrew K. Persily

Absolute radiation pressure detector using a diamagnetically levitating test mass

October 28, 2021

Author(s)

Anna Vaskuri, Daniel Rahn, Paul A. Williams, John H. Lehman

We have developed an absolute radiometer to measure laser power by means of radiation pressure in a closed control-loop configuration using diamagnetically levitated pyrolytic graphite as the soft spring and gravity as a contactless restoring force. Our

On the Voltage and Bowl Correction of Trigger-Uncorrelated Multihit Events

October 28, 2021

Author(s)

Benjamin Caplins, Ann Chiaramonti Debay, Luis Miaja Avila, Norman A. Sanford

Reversible Self-Association in Lactate Dehydrogenase during Freeze-Thaw in Buffered Solutions using Neutron Scattering

October 28, 2021

Author(s)

Jayesh Sonje, Seema Thakral, Susan T. Krueger, Raj Suryanarayanan

The effect of freezing and thawing stresses on lactate dehydrogenase (LDH) stability were evaluated under three conditions: (i) in a solution buffered with sodium phosphate (NaP),where the selective crystallization of disodium hydrogen phosphate during

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