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Displaying 5201 - 5225 of 73839

Collector Series-Resistor to Stabilize a Broadband 400 GHz Common-Base Amplifier

October 14, 2021
Author(s)
Jerome Cheron, Dylan Williams, Richard Chamberlin, Miguel Urteaga, Kassi Smith, Nick Jungwirth, Bryan Bosworth, Chris Long, Nate Orloff, Ari Feldman
The indium phosphide (InP) 130 nm double-heterojunction bipolar transistor (DHBT) offers milliwatts of output power and high signal amplification in the lower end of the terahertz frequency band when the transistor is used in a common-base configuration

Artificial intelligence for search and discovery of quantum materials

October 13, 2021
Author(s)
Aaron Kusne, Takeuchi Ichiro, Valentin Stanev, Johnpierre Paglione
Artificial intelligence and machine learning are becoming indispensable tools in many areas of physics, including astrophysics, particle physics, and climate science. In the arena of quantum materials, the rise of new experimental and computational

Cryogenic Characterization of a Superconductor Quantum-Based Microwave Reference Source for Communications and Quantum Information

October 13, 2021
Author(s)
Alirio De Jesus Soares Boaventura, Justus Brevik, Dylan Williams, Nathan Flowers-Jacobs, Manuel Castellanos Beltran, Anna Fox, Pete Hopkins, Paul Dresselhaus, Samuel P. Benz
We are developing a new instrument, the RF Josephson arbitrary waveform synthesizer (RF-JAWS), for communications metrology and quantum information applications. An important aspect of the RF-JAWS design is the accurate and traceable characterization of

Low-GWP Alternative Refrigerant Blends for HFC-134a: Interim Report

October 13, 2021
Author(s)
Piotr A. Domanski, Mark O. McLinden, Valeri I. Babushok, Ian Bell, Tara Fortin, Michael Hegetschweiler, Mark A. Kedzierski, Dennis Kim, Lingnan Lin, Gregory T. Linteris, Stephanie L. Outcalt, Richard A. Perkins, Aaron Rowane, Harrison M. Skye
This project addresses the objectives of the Statement of Need number WPSON-17-20 "No/Low Global Warming Potential Alternatives to Ozone Depleting Refrigerants." Its goal is to identify and demonstrate performance of low global-warming-potential (GWP), non

STEP File Analyzer and Viewer User Guide (Update 7)

October 13, 2021
Author(s)
Robert R. Lipman
The STEP File Analyzer and Viewer opens a STEP (ISO 10303 - STandard for Exchange of Product model data) Part 21 file and (1) generates a spreadsheet or CSV files of all entity and attribute information, (2) creates a visualization (view) of part geometry

Thermal Analysis of Nanoparticles: Methods, Kinetics, and Recent Advances

October 13, 2021
Author(s)
Elisabeth Mansfield, Mark Banash
This chapter provides an overview of the thermal techniques available to study nanoparticles, with particular attention to thermogravimetric analysis, calorimetry and differential scanning calorimetry. The advantages of thermal analysis for nanoparticle

A Combinatorial Approach to TCO Synthesis and Characterization

October 12, 2021
Author(s)
J D. Perkins, Dennis W. Readey, J. L. Alleman, J A. del Cueto, King C. Li, T J. Coutts, R Stauber, C. H. Duncan, David P. Young, P A. Parilla, B Keyes, L M. Geduilas, Davor Balzar, Q Wang, D Ginley
We have developed the deposition, characterization and analysis tools necessary for a combinatorial approach to thin flim metal oxides, with a special focus on transparent conducting oxides (TCOs). We are presently depositing compositionally graded

A Comparative AFM Study of the Compressibility and Friction of Unmodified and Oligo(ethylene oxide)-Modified Alkane Thiol SAMs on Au(111) Using Nanografting

October 12, 2021
Author(s)
Ying Hu, David J. Vanderah, Guangyao Liu, William J. Price, Milan Mrksich, G Scoles
Self-assembled monolayers (SAMs) terminated with oligo(ethylene glycol) (OEG) segments are known to resist non-specific protein adsorption and are used in biomaterial and biosensor applications. In this report we use an atomic force microscopy (AFM)

A Continuum-Atomistic Simulation of Heat Transfer in Micro- and Nano-Flows

October 12, 2021
Author(s)
J Liu, S Chen, Xiaobo Nie, M O. Robbins
We develop a hybrid atomistic-continuum scheme for simulating micro- and nano- flows with heat transfer. The approach is based on spatial ''domain decomposition'' in which molecular dynamics (MD) is used in regions where atomistic details are important

A Field Unit for Spectral Irradiance Responsivity Calibrations

October 12, 2021
Author(s)
E A. Thompson, P Disterhoft, E A. Early
Withdrawn by author - 11/10/97Horizontal standard lamps calibrate the spectral irradiance responsivity of spectroradiometers which measures solar ultraviolet irradiance. Experience at field instrument intercomparisons suggested several important

A High-Field, Low-Current Superconducting Ioffe Magnetic Trap

October 12, 2021
Author(s)
S N. Dzhosyuk, C R. Brome, J S. Butterworth, P R. Huffman, C E. Mattoni, D N. McKinsey, R A. Michniak, L Yang, John M. Doyle
A superconducting Ioffe magnetic trap is designed, built and characterized. The trap consists of four racetrack-shaped quadrupole coils and two solenoid assemblies. Coils are wet wound with multifilament copper-clad NgTi superconducting wire embedded in an

A Loop in the N-terminal Region of MCM Mediates Communication With the Catalytic Domain

October 12, 2021
Author(s)
Nozomi Sakakibara, Rajesh Kasiviswanathan, E Melamud, Frederick P. Schwarz, Z Kelman
Minichromosome maintenance helicases are the presumptive replicative helicases, thought to separate the two strands of chromosomal DNA during replication. In archaea, the catalytic activity resides within the C-terminal region of the MCM protein. In

A Minimalist Sensor System for Mold Filling

October 12, 2021
Author(s)
S R. Kueh, S G. Advani, Richard~undefined~undefined~undefined~undefined~undefined Parnas
Reliable mold filling remains the most critical issue in the commercial application of liquid composite molding. Many techniques of observing the flow are either cumbersome or too invasive for routine service. Combining the sensor output from a single

A New Determination of G

October 12, 2021
Author(s)
J P. Schwarz, J E. Faller, T M. Niebauer, F Klopping, D S. Robertson, G Sasagawa
A short test run of the apparatus was conducted in February 1997 and gave promising results. A difference signal of about 80 υGal was observed, with reasonable scatter in G values from day to day. A sample of the data is seen in figure 1. This scatter

A New Reactive Molecular Dynamics Model Of Polymer Pyrolysis

October 12, 2021
Author(s)
Stanislav Stoliarov, Kenneth D. Smith, P R. Westmoreland, Richard E. Lyon, Marc R. Nyden
In this paper, we report progress that has been made in the development of an extension of classical force-field-based molecular dynamics (MD) to the simulation of chemical reactions. We review several studies of polymer pyrolysis that were performed using

A Predictive Formula for the Electron Stopping Power

October 12, 2021
Author(s)
Aleksander Jablonski, S Tanuma, Cedric J. Powell
We describe the development of a new analytical formula for the electron stopping power (SP) for electron energies between 200 eV and 30 keV. This formula describes the product of the SP and the inelastic mean free path (IMFP), and is a simple function of
Displaying 5201 - 5225 of 73839
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