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Displaying 10951 - 10975 of 73893

Metal Organic Framework-Coated Optical VOC Gas Sensor

November 8, 2018
Author(s)
Yangyang Zhao, Mona E. Zaghloul, Yigal Lilach, Kurt Benkstein, Stephen Semancik
We report a metal organic framework (MOF)-coated nanohole array based plasmonic gas sensor. Arrays of 200 nm circular holes are fabricated with a period of 400 nm. 10 nm thick MOF is coated on the sensor platform to provide high sensitivity and real-time

Tile-and-trim micro-resonator array fabrication optimized for high multiplexing factors

November 8, 2018
Author(s)
Christopher M. McKenney, Jason E. Austermann, James A. Beall, Bradley J. Dober, Shannon M. Duff, Jiansong Gao, Gene C. Hilton, Johannes Hubmayr, Dale Li, Joel N. Ullom, Jeffrey L. Van Lanen, Michael R. Vissers
We present a superconducting micro-resonator array fabrication method that is scalable and reconfigurable and has been optimized for high multiplexing factors. The method uses uniformly sized tiles patterned on stepper photolithography reticles as the

A Metal?Organic Framework with Suitable Pore Size and Specific Functional Site for the Removal of Trace Propyne from Propylene

November 7, 2018
Author(s)
Libo Li, Hui-Min Wen, Chaohui He, Rui-Biao Lin, Rajamani Krishna, Hui Wu, Wei Zhou, Jinping Li, Banglin Chen
Removal of trace propylene (C 3H 4) from propylene/propyne (C 3H 4/C 3H 6) mixtures is more complicated and challenging than that of acetylene/ethylene (C 2H 2/C 2H 4) in view of their closer molecular sizes and physical properties. Research on C 3H 4C 3H

Influence of Fire on the Shear Capacity of Cold-Formed Steel Framed Shear Walls

November 7, 2018
Author(s)
Matthew S. Hoehler, Blanca Andres Valiente
This paper presents experimental investigations of the performance of common lateral force- resisting systems used in cold-formed steel construction under sequential thermal (fire) and mechanical (earthquake) loading. Wall specimens with gypsum-sheet steel

Optimizing linearity in high-speed photodiodes

November 7, 2018
Author(s)
Josue Davila-Rodriguez, X. Xie, J. Zang, Christian J. Long, Tara M. Fortier, Holly F. Leopardi, Takuma Nakamura, J. C. Campbell, Scott A. Diddams, Franklyn J. Quinlan
Analog photonic links require high fidelity, high speed optical-to-electrical conversion for applications such as radio-over-fiber, synchronization at kilometer-scale facilities, and low- noise electronic signal generation. Nonlinearity is a particularly

Design of superconducting optoelectronic networks for neuromorphic computing

November 6, 2018
Author(s)
Sonia Buckley, Adam McCaughan, Jeff Chiles, Richard Mirin, Sae Woo Nam, Jeff Shainline
We have previously proposed a novel hardware platform for neuromorphic computing based on superconducting optoelectronics that presents many of the features necessary for information processing in the brain. Here we discuss the design and training of

Estimating Smoke Detector Effectiveness and Utilization in Homes

November 6, 2018
Author(s)
Stanley W. Gilbert
This report sets out to answer three questions. What effect does installing smoke detectors have on reported fires and casualties for the “average” household? How much of an effect would increasing smoke detector utilization have on the total number of

Tuning the Relaxation of Nano-Patterned Polymer Films with Polymer-Grafted Nanoparticles: Observation of Entropy-Enthalpy Compensation

November 6, 2018
Author(s)
Sonal Bhadauriya, Xiaoteng Wang, Jack F. Douglas, Praveen Pitliya, Jianan Zhang, Dharmaraj Raghavan, Michael R. Bockstaller, Christopher Stafford, Alamgir Karim
Polymer films provide a versatile "plastic" material in which complex functional relief patterns can be imprinted with a resolution down to tens of nanometers. However, the utility of such patterned materials is limited by the tendency of imprinted

Tuning the Relaxation of Nanopatterned Polymer Films with Polymer-Grafted Nanoparticles: Observation of EntropyEnthalpy Compensation

November 6, 2018
Author(s)
Jack F. Douglas, Xiaoteng Wang, Sonal Bhadauriya, Ren Zhang, Praveen Pitliya, Dharmaraj Raghavan, Alamgir Karim
We show that the previously observed polymeric clustering of nanoparticles (NPs) with grafted chains within polymer matrices can be pattern-directed by nanoimprinting ultrathin nanocomposite films so that the NPs segregate to thicker film regions where

A Survey on Knowledge Transfer for Manufacturing Data Analytics

November 5, 2018
Author(s)
Seung Hwan Bang, Ronay Ak, Anantha Narayanan Narayanan, Yung-Tsun T. Lee, Hyunbo Cho
Data analytics techniques have been used for numerous manufacturing applications in various areas. A common assumption of data analytics models is that the environment that generates data is stationary, that is, the feature (or label) space or distribution

Measuring the difference in nuclear charge radius of Xe isotopes by EUV spectroscopy of highly charged Na-like ions

November 5, 2018
Author(s)
Roshani Silwal, A. Lapierre, John D. Gillaspy, Joan M. Dreiling, S A. Blundell, Dipti Goyal, A. Borovik, Jr., G Gwinner, A.C.C. Villari, Yuri Ralchenko, Endre Takacs
The difference in the mean-square nuclear charge radius of xenon isotopes was measured utilizing a method based on extreme ultraviolet spectroscopy of highly charged Na-like ions. The isotope shift of the Na-like D1 (3s 2S1/2 − 3p 2P1/2) transition between

Polymorphism and thermophysical properties of L- and DL-menthol

November 5, 2018
Author(s)
Vojtech Stejfa, Ala Bazyleva, Michal Fulem, Jan Rohlicek, Eliska Skorepova, Kvetoslav Ruzicka, Andrey V. Blokhin
The thermodynamic properties, phase behavior, and kinetics of polymorph transformations of racemic (DL-) and enantiopure (L-) menthol were studied using a combination of advanced experimental techniques, including static vapor pressure measurements

Propagation of Compact-Modeling Measurement Uncertainty to 220 GHz Power-Amplifier Designs

November 5, 2018
Author(s)
Jerome Cheron, Dylan Williams, Konstanty Lukasik, Richard Chamberlin, Benjamin Jamroz, Erich N. Grossman, Wojciech Wiatr, Dominique Schreurs
We studied the impact of measurement uncertainties in a HBT model and their consequences on the electrical performance under large signal conditions at 9 GHz. Then we use the model with uncertainties to verify the ability of our model to accurately predict

Jitter Sensitivity Analysis of the Superconducting Josephson Arbitrary Waveform Synthesizer

November 4, 2018
Author(s)
Christine A. Donnelly, Justus Brevik, Paul Dresselhaus, Pete Hopkins, Samuel P. Benz
We present the first jitter sensitivity analysis of a superconducting voltage reference waveform synthesizer with fundamentally accurate output pulses. Successful deployment of a reference waveform source at microwave frequencies will represent a new

Modulated Photocurrent Measurements in Double Junction Solar Cells

November 4, 2018
Author(s)
Nicolas Marquez Peraca, Behrang Hamadani
Frequency dependent external quantum efficiency (EQE) measurements were performed on double junction solar cells by a custom-designed system consisting of an array of various monochromatic LEDs. Some LEDs were pulsed as a function of frequency while others

Precision Optical Antenna Alignment System for Tracking Antennas in 6-DOF

November 4, 2018
Author(s)
Joshua A. Gordon, David R. Novotny, Michael S. Allman
We present on an all-optical spatial metrology system, the PiCMM, that aids in the alignment and tracking of antennas with accuracies on the order of 25 microns and 0.01 deg. This system speeds up millimeter-wave antenna alignment, does not require contact

Rydberg Atom-based RF Power Measurements

November 4, 2018
Author(s)
Matthew T. Simons, Marcus D. Kautz, Abdulaziz H. Haddab, Joshua A. Gordon, Christopher L. Holloway, Thomas P. Crowley
The power transmitted through a waveguide was determined using in-situ atom-based electric field measurements. The field distribution in the waveguide was measured using Rydberg atoms to find the maximum field, which was used to determine the power. For a

A Systematic Study: Channel Sounding via Modal Expansion

November 3, 2018
Author(s)
Alex Yuffa, Ben Jamroz, Jake Rezac, Dylan Williams
We present preliminary results of using a modal (partial wave) expansion of the field to characterize a propagation channel. We assume that the measurements of the scalar, two-dimensional field from which the modal expansion coefficients are obtained

Antenna Radiation Pattern Measurements in Reverberation Chamber

November 3, 2018
Author(s)
Audrey K. Puls
Antenna radiation pattern measurements are typically performed in anechoic chambers which are expensive to buy and inconvenient to rent from external facilities. This paper investigates the use of a reverberation chamber for antenna radiation pattern
Displaying 10951 - 10975 of 73893
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