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Displaying 2776 - 2800 of 74634

Using Full Pose Measurement for Serial Robot Calibration

April 6, 2022
Author(s)
Marek Franaszek, Jeremy Marvel
To ensure smooth robot operations, parameters of its kinematic model and a registration transformation between robot base and world coordinate frame must be determined. Both tasks require data acquired by external sensors that can measure either 3D

Highly Tunable Magnetic Phases in Transition-Metal Dichalcogenide Fe 1/3+d NbS 2

April 5, 2022
Author(s)
Shan Wu, Zhijun Xu, Shannon Haley, Sophie Weber, Arani Acharya, Eran Maniv, Yiming Qiu, A. A. Aczel, Nicholas S. Settineri, Jeffrey Neaton, James Analytis, Robert Birgeneau
Layered transition metal dichalcogenides (TMDCs) host a plethora of interesting physical phenomena ranging from charge order to superconductivity. By introducing magnetic ions into 2H-NbS 2, the material forms a family of magnetic intercalated TMDCs T xNbS

Performance of a Kinetic-Inductance Traveling-Wave Parametric Amplifier at 4 Kelvin: Toward an Alternative to Semiconductor Amplifiers

April 5, 2022
Author(s)
Maxime Malnou, Joe Aumentado, Michael Vissers, Jordan Wheeler, Johannes Hubmayr, Joel Ullom, Jiansong Gao
Most microwave readout architectures in quantum computing or sensing rely on a semiconductor amplifier at 4\,K, typically a high-electron mobility transistor (HEMT). Despite its remarkable noise performance, a conventional HEMT dissipates several

Symmetry of Magnetic Correlations in Spin-Triplet Superconductor UTe2

April 5, 2022
Author(s)
Nicholas Butch, Sheng Ran, Shanta Saha, Paul Neves, Mark P. Zic, Johnpierre N. Paglione, Yegor N. Vekhov, Sergiy Gladchenko, Jose Rodriguez Rivera
The temperature dependence of the low-energy magnetic excitations in the spin-triplet superconductor UTe2 was measured via inelastic neutron scattering in the normal and superconducting states. These excitations have a peak instensity at 4 meV, follow the

The local structure of sulfur vacancies on the basal plane of monolayer MoS2

April 5, 2022
Author(s)
Angel Garcia-Esparza, Sangwook Park, Abrosham Hadi, John Vinson, Baxter Abraham, Alessandro Gallo, Dennis Nordlund, Taeho Roy Kim, Roberto Alonso-Mori, Jean-Luc Bredas, Xiaolin Zheng, Dimosthenis Sokaras
The nature of the S-vacancy is central to controlling the electronic properties of monolayer MoS2. Understanding the geometric and electronic structures of the S-vacancy on the basal plane of monolayer MoS2 remains elusive. Here, operando S K-edge X-ray

2022 Spring/Summer ARFTG Microwave Measurement Conference

April 4, 2022
Author(s)
Jon Martens, Andrej Rumiantsev, Marco De Spirito, Jeffrey Jargon
The Automatic RF Techniques Group (ARFTG) is a technical organization interested in all aspects of RF and microwave test and measurement. Originally created as a users' forum focused on the calibration and automation of early vector network analyzers

A pyroelectric detector-based method for low uncertainty spectral irradiance and radiance responsivity calibrations in the infrared using tunable lasers

April 4, 2022
Author(s)
Brian Alberding, John Woodward, Ping-Shine Shaw, Leonard Hanssen, Catherine Cooksey, Joseph P. Rice
The standard uncertainty of detector-based radiance and irradiance responsivity calibrations in the short-wave infrared (SWIR) traditionally has been limited to around 1 % or higher by the low spatial uniformity of detectors used to transfer the scale from

Generic character of charge and spin density waves in superconducting cuprates

April 4, 2022
Author(s)
Sangjun Lee, Edwin Huang, Thomas Johnson, Xuefei Guo, Ali Husain, Matteo Mitrano, Kannan Lu, Alexander Zakrzewski, Gilberto de la Pena, Yingying Peng, Hai Huang, Sang-Jun Lee, Hoyoung Jang, Jun-Sik Lee, Young Joe, W.Bertrand (Randy) Doriese, Paul Szypryt, Daniel Swetz, Songxue Chi, Adam Aczel, Gregory MacDougall, Steven Kivelson, Eduardo Fradkin, Peter Abbamonte
Charge density waves (CDWs) have been observed in nearly all families of copper-oxide superconductors. But the behavior of these phases across different families has been perplexing. In La-based cuprates, the CDW wavevector is an increasing function of

INFLUENCE OF H2S ON THE LOCALISED CORROSION OF 316L STAINLESS STEEL: PART 1 - COUPON TESTING

April 4, 2022
Author(s)
James Hesketh, Edmund Dickinson, Gregory McMahon, May Ling Martin, Alan Turnbull, Gareth Hinds
Corrosion coupon immersion tests were performed on 316L SS in 50,000 ppm Cl- at 110 °C to evaluate the effect of partial pressure of H2S on pit depth and density in a simulated oilfield environment. The protective film formed in these environments was

Modern RF Measurements with Hot Atoms

April 4, 2022
Author(s)
Aly Artusio-Glimpse, MATTHEW SIMONS, Nik Prajapati, chris holloway
Over a hundred years later, the classic antenna, first invented by Heinrich Hertz, in 1888, [1], is still the dominant technology used for the measurement of RF fields. Just seven years after its invention, Guglielmo Marconi applied the antenna to long

Size-Exclusion Chromatography: A twenty-first Century Perspective

April 4, 2022
Author(s)
Andre Striegel
Now in its sixth decade, size-exclusion chromatography (SEC) remains the premier method by which to determine the molar mass averages and distributions of natural and synthetic macromolecules. Aided by its coupling to a variety and multiplicity of

A complete reference genome improves analysis of human genetic variation

April 1, 2022
Author(s)
Sergey Aganezov, Stephanie Yan, Daniela Soto, Melanie Kirsche, Samantha Zarate, Justin Wagner, Jennifer McDaniel, Nathanael David Olson, Rajiv McCoy, Megan Dennis, Justin Zook, Michael Schatz
Compared to its predecessors, the Telomere-to-Telomere CHM13 genome adds nearly 200 million base pairs of sequence, corrects thousands of structural errors, and unlocks the most complex regions of the human genome for clinical and functional study. We show

Basic Cybersecurity Recommendations for HVAC Systems- Passwords

April 1, 2022
Author(s)
Michael Galler
Cybersecurity has been a topic of increasing importance for several years. While fully securing a large and complex system can be very complicated, there are some basic precautions that can easily be applied to any system, and some basic precautions that

Coherent anti-Stokes Raman scattering (CARS) microscopy for polymers

April 1, 2022
Author(s)
Shuyu Xu, Charles Camp, Young Jong Lee
Coherent anti-Stokes Raman scattering (CARS) microscopy is a label-free chemical imaging modality capable of interrogating local molecular composition, concentration, and even orientation. In comparison to traditional Raman spectroscopy/imaging, CARS
Displaying 2776 - 2800 of 74634