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Search Publications

NIST Authors in Bold

Displaying 11576 - 11600 of 13225

Dynamic acoustic optimization of pulse tube refrigerators for rapid cooldown

April 23, 2024
Author(s)
Ryan Snodgrass, Vincent Kotsubo, Scott Backhaus, Joel Ullom
… Pulse tube refrigerators are a critical enabling technology for many disciplines that require low … millikelvin temperatures using additional cooling stages. In state-of-the-art commercial pulse tube refrigerators, the … is incorrect during the cooldown process, which results in wasted power consumption by the compressor and slow …

Multiscale analysis of pangenomes enables improved representation of genomic diversity for repetitive and clinically relevant genes

June 26, 2023
Author(s)
Chen-Shan Chin, Sairam Behera, Asif Khalak, Fritz Sedlazeck, Justin Wagner, Justin Zook
… Advancements in sequencing technologies and assembly methods enable the … characterizing complex regions. However, challenges remain in efficiently interpreting variation at various scales, from … multiple scales. We apply the graph decomposition methods in PGR-TK to the class II major histocompatibility complex …

Exclusive Recognition of CO2 from Hydrocarbons by Aluminum Formate with Hydrogen-Confined Pore Cavities

May 31, 2023
Author(s)
Zhaoqiang Zhang, Zeyu Deng, Hayden Evans, Dinesh Mullangi, Chengjun Kang, Shing B. Peh, Yuxiang Wang, Craig Brown, John Wang, Pieremanuele Canepa, Anthony K. Cheetham, Dan Zhao
… hydrocarbons via adsorptive separation is an important technology in the petrochemical industry, especially for acetylene … This molecular recognition mechanism is unveiled by in-situ Fourier-transform infrared spectroscopy, X-ray …

IEEE 802.11bf: Enabling the Widespread Adoption of Wi-Fi Sensing

May 31, 2023
Author(s)
Tanguy Ropitault, Steve Blandino, Anirudha Sahoo, Nada T. Golmie
… In recent years, Wi-Fi has been shown to be a viable … development. Due to the significant and growing interest in Wi-Fi sensing, Task Group IEEE 802.11bf was formed to …

Network Security: Private Communication in a Public World 3rd Edition

September 16, 2022
Author(s)
Charlie Kaufman, Radia Perlman, Michael Speciner, Ray Perlner
… workings of cryptography and network security protocols. In this edition, the authors have significantly updated and … important. This book explains sophisticated concepts in a friendly and intuitive manner. For protocol standards, … Network Security, Private Communication in a Public World, 3rd Edition …

Serial flow cytometry in an inertial focusing optofluidic microchip for direct assessment of measurement variations

July 20, 2022
Author(s)
Matthew DiSalvo, Paul Patrone, Anthony Kearsley, Gregory Cooksey
… Flow cytometry is an invaluable technology in biomedical research, yet it has limited ability to … instrument parameters leading to overall improvements in the ability to better classify sample composition and to … Serial flow cytometry in an inertial focusing optofluidic microchip for direct …

Broadband polarization insensitivity and high detection efficiency in high-fill-factor superconducting microwire single-photon detectors

May 13, 2022
Author(s)
Dileep Reddy, Negar Otrooshi, Sae Woo Nam, Richard Mirin, Varun Verma
… Single-photon detection via absorption in current-biased nanoscale superconducting structures has become a preferred technology in quantum optics and related fields. Single-mode fiber … polarization insensitivity and high detection efficiency in high-fill-factor superconducting microwire single-photon …

Curated variation benchmarks for challenging medically relevant autosomal genes

February 7, 2022
Author(s)
Justin Wagner, Nathanael David Olson, Lindsay Harris, Jennifer McDaniel, Fritz Sedlazeck, Chen-Shan Chin, Justin Zook
… genes poses a challenge for their accurate analysis in a clinical setting. The Genome in a Bottle Consortium has provided variant benchmark sets, … and GRCh38 across HG002. We show that false duplications in either GRCh37 or GRCh38 result in reference-specific, …

Report on the SIM Photometry and Radiometry Key Comparison of Spectral Regular Transmittance (SIM.PR-K6.2010)

September 10, 2021
Author(s)
Catherine Cooksey, Blaza Toman
… Eight national metrology institutes participated in the comparison, which covered the spectral range from 380 … (CCPR-K6.2010). The National Institute of Standards and Technology (NIST) served as the pilot. Each participant … value (KCRV) of the CCPR comparison and are expressed in terms of degrees of equivalence. While most of the …

Electrically Driven Exchange Bias via Solid State Magneto-Ionics

August 4, 2021
Author(s)
Peyton Murray, Christopher Jensen, Alberto Quintana, Junwei Zhang, Xixiang Zhang, Alexander Grutter, Brian Kirby, Kai Liu
… to magneto-ionically and electrically tune exchange bias in Gd/Ni 1-x Co x O thin films (x=0.50, 0.67), where neither …

Accessing Inclusivity of Women at NIST: A Comprehensive Examination of HR Data, In-Depth Interviews and Survey Data

July 6, 2021
Author(s)
Mary Frances Theofanos, Sandra Spickard Prettyman
… In the fall of 2019, the National Institute of Standards and Technology (NIST) funded three studies to better understand … exploratory mixed methods study designed to provide an in-depth look at the population of NIST federal employees to … Diversity, Inclusivity, Gender, In-Depth Interviews, Survey, Mixed-Methods. …

Optical Power Scale Realization by Laser Calorimeter after 45 Years of Operation

June 28, 2021
Author(s)
Matthew Spidell, Anna Vaskuri
… and energy meters, the National Institute of Standards and Technology (NIST) uses several detector-based realizations of … 95 % confidence. The dominant uncertainty contribution in the instrument is attributable to light scattered by the … recognized. The inherent electro-optical inequivalence in the calorimeter's response was reassessed by thermal …

Creation and Release of an Updated NIST DART-MS Forensics Database

June 17, 2021
Author(s)
Edward Sisco, Arun Moorthy, Laura M. Watt
… been implementing new analytical tools. Direct analysis in real time mass spectrometry (DART-MS) is often one of … useful, can be difficult to interpret, especially in the case of complex mixtures. Mass spectral databases are … underlying data. The National Institute of Standards and Technology (NIST) released an initial DART-MS mass spectral …

Forensic Handwriting Examination and Human Factors: Improving the Practice Through a Systems Approach

June 1, 2021
Author(s)
Melissa Taylor, Brett Bishop, Ted Burkes, Michael Caligiuri, Bryan Found, Carolyne Bird, Wesley Grose, Lauren Logan, Kenneth Melson, Mara Merlino, Larry Miller, Linton Mohammed, Jonathan Morris, John Paul Osborn, Nikola Osborne, Brent Ostrum, Christopher Saunders, Scott Shappell, H. David Sheets, Sargur Srihari, Reinoud Stoel, Thomas Vastrick, Heather Waltke, Emily Will
… handwriting examination is not immune to errors. In June 2015, the US National Institute of Standards and Technology convened the Expert Working Group for Human Factors in Handwriting Examination to conduct a scientific assessment …

Deep Reinforcement Learning for Edge Service Placement in Softwarized Industrial Cyber-Physical System

May 6, 2021
Author(s)
Hamid Gharavi
… methods of design schemes, the service placement problem in industrial CPS has not been well studied. Furthermore, … placement, workload scheduling, and resource allocation in order to minimize service response delay. We then propose … workload scheduling decisions are assisted by means of DQN technology. The experimental results verify that the proposed …

Flexible Assemblies of Electrocapacitive Volume Tomographic Sensors for Gauging Fuel of Spacecraft

April 30, 2021
Author(s)
Seung H. Yang, Yong Sik Kim, Nicholas G. Dagalakis, Yicheng Wang
… Gauging propellant fuel of spacecraft in outer space has been an issue, because their liquid fuels … techniques may not be an accurate way of gauging the fuel in space. In this paper, we report a flexible monolithic … fluid showed that the National Institute of Standards and Technology's flexible electrocapacitive volume tomography …

Cluster Morphology of Colloidal Systems with Competing Interactions

April 15, 2021
Author(s)
Nestor E. Valadez-Perez, Yun Liu, Ramon Castaneda-Priego
… a long-ranged repulsion to the potential modifies the way in which the particles aggregate into clusters and form … systems, including concentrated protein solutions. In this work, the equilibrium cluster morphology of particles …

Tandem Heterogeneous Catalysis for Polyethylene Depolymerization via an Olefin-Intermediate Process

January 8, 2021
Author(s)
Kathryn Beers, Sara Orski, Lucas Ellis, Andrew Norman, Yuriy Rom?n-Leshkov, Gregg T. Beckham
… The accumulation of plastic waste in the environment has prompted the development of new … and from high-density polyethylene substrate, both in an n-pentane solvent. For the PE substrate, a molecular weight decrease of 74% was observed at 200°C in 15 hr. This type of tandem chemistry, in which, poorly …

Economic considerations for recovery-based design

September 20, 2020
Author(s)
Juan Fung, Dustin Cook, Yating Zhang, Katherine Johnson, Siamak Sattar
… may not align with owner and occupant expectations. In particular, the literature has documented that building … an earthquake. The National Institute of Standards and Technology is leading research efforts on recovery-based … articulating an economic case for recovery-based design. In this paper, we discuss the importance of evaluating the …

Assessing Fire Smoke to Predict Backdraft and Smoke Explosion Potential

June 3, 2020
Author(s)
Ryan Falkenstein-Smith, Thomas Cleary
… Division at the National Institute of Standards and Technology is investigating the ability to forecast backdraft … a broad spectrum of fuel-rich and fuel-lean conditions. In this work, predetermined gas mixtures are fed into the phi … equivalence ratios for all gas mixtures are observed to be in substantial agreement. Concentration measurements are …

Linear Polarization of Anisotropically Excited X-ray Lines from the n=2 Complex in He-like Ar16+

May 13, 2020
Author(s)
Dipti Goyal, Sean W. Buechele, Amy C. Gall, Samuel C. Sanders, Csilla I. Szabo-Foster, Roshani Silwal, Endre A. Takacs, Yuri Ralchenko
… were recorded at the National Institute of Standards and Technology (NIST) electron beam ion trap (EBIT) using two … The linear polarizations of the 1s2 1s2l transitions in He-like argon ions were determined from the measured … 1S0 .. 1s2s 3S1, 1s2 1S0 .. 1s2p 3P2 ) were found to be in good agreement with the calculations. …

A Multi-Band Rydberg-Atom Based Receiver/Antenna: AM/FM Stereo Reception

April 2, 2020
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon
… of the International System of Units (SI) that occurred in October of 2018, there has recently been a great deal of attention in the development atom-base sensors for metrology applications. In particular great progress had been made in using …

Laser-free GHz stroboscopic TEM: components, system integration, and practical considerations for pump-probe measurements

February 24, 2020
Author(s)
June W. Lau, Karl B. Schliep, Michael B. Katz, Vikrant J. Gokhale, Jason J. Gorman
… modified to produce broadband pulsed beams, that can be in principle, between 40 MHz to 12 GHz, corresponding to temporal resolution in the nanosecond to picosecond range without an excitation laser. The key enabling technology is a pair of phase-matched modulating and …

So, You Want to Have a Nanofab? SharedUse Nanofabrication and Characterization Facilities: Cost-of-Ownership, Toolset, Utilization, and Lessons Learned

February 21, 2020
Author(s)
James A. Liddle, Jerry L. Bowser, Bojan Ilic, Vincent K. Luciani
… As a result, these facilities are typically operated in a shared-use mode. We discuss the key factors that must be … commitment, and the hands-on involvement of managers in facility operations. We consider startup, operating, and … concepts using the National Institute of Standards and Technology (NIST) NanoFab as our test case, but the …
Displaying 11576 - 11600 of 13225
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