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Displaying 276 - 300 of 1184

Poisson Ratio and Covalency - Ionicity

October 16, 2008
Author(s)
H M. Ledbetter, Sung Kim
For twenty-one 8-N (octet) compounds, we consider the dependence of the Poisson ratio upsilion} on fractional covalent-ionic character estimated from atomic electronegativites. Compounds with ionicity approaching 1.0 show Poisson ratios near the upper

Charge Order Evolution of Superconducting BaNi2As2 Under High Pressure

November 2, 2023
Author(s)
John Collini, Daniel Campbell, Daniel Sneed, Prathum Saraf, Christoper Eckberg, Jason Jeffries, Nicholas Butch, Johnpierre Paglione
BaNi2As2, a nonmagnetic superconductor counterpart to BaFe2As2, has been shown to develop nematic order, multiple charge orders, and a dramatic sixfold enhancement of superconductivity via isovalent chemical substitution of Sr for Ba. Here we present high

Use of Transition Models to Design High Performance TESs for the LCLS-II Soft X-Ray Spectrometer

March 4, 2019
Author(s)
Kelsey M. Morgan, Daniel T. Becker, Douglas A. Bennett, William B. Doriese, Johnathon D. Gard, K D. Irwin, Sang-Jun Lee, Dale Li, John A. Mates, Christine G. Pappas, Daniel R. Schmidt, Charles Titus, Daniel Van Winkle, Joel N. Ullom, Abigail L. Wessels, Daniel S. Swetz
We are designing an array of transition-edge sensor (TES) microcalorimeters for a soft X-ray spectrometer at the Linac Coherent Light Source at SLAC National Accelerator Laboratory to coincide with upgrades to the free electron laser facility. The complete

Investigation of the Charge Compensation Mechanism on the Electrochemically Li-Ion Deintercalated Li 1-x Co 1/3 Ni 1/ 3MN 1/3 O 2 Electrode System by Combination of Soft and Hard X-Ray Absorption Spectroscopy

January 11, 2005
Author(s)
W S. Yoon, Kyung Y. Chung, Xiao-Qing Yang, James McBreen, Mahalingam Balasubramanian, C P. Grey, Daniel A. Fischer
In situ hard X-ray absorption spectroscopy (XAS) at metal K-edges and soft XAS at O K-edge and metal L-edges have been carried out during the first charging process for the layered Li1-2Co1/3Ni1/3Mn1/3O2 cathode material. The metal K-edge XANES results

Isochoric p-rho-T and Heat Capacity Cv Measurements for Ternary Refrigerant Mixtures Containing Difluoromethane (R32), Pentafluoroethane (R125), and 1,1,1,2-Tetrafluoroethane (R134a) From 200 to 400 at Pressures to 35 MPa

June 1, 1999
Author(s)
Joe W. Magee
… for temperature and is 0.01% for pressure at p>3 MPa and 0.05% at p3), with a standard uncertainty of 0.003 cm 3 . When … estimate) of the density measurements is estimated to be 0.05%. For the C^dυ calorimeter, the uncertainty of the … of the heat capacity measurements is estimated to be 0.7%. …

Calibration of Scanning Electron Microscope Magnification Standards SRM-484

May 1, 1996
Author(s)
Joseph Fu, Theodore V. Vorburger, D Ballard
Standard Reference Material (SRM) 484 is an artifact for calibrating the magnification scale of a scanning electron microscope. Since 1977 the National Institute of Standards and Technology (NIST) has produced seven issues of SRM484 amounting to

Compressed-Liquid Densities of Three Reference Fuels for Combustion Testing

September 19, 2016
Author(s)
Stephanie L. Outcalt
Compressed-liquid densities of three aviation fuels have been measured with a vibrating-tube densimeter. The measurements were made from 270 K to 470 K, and 0.5 MPa to 45 MPa and have an overall combined uncertainty of 0.81 kg.m-3. The data from each of

On-demand Single Photons from Individual Epitaxial Quantum Dots

October 24, 2005
Author(s)
Richard P. Mirin, Martin J. Stevens
We will describe our group's efforts to use epitaxial InGaAs/GaAs quantum dots as sources of on-demand single photons and indistinguishable single photons. We have demonstrated second order intensity correlation measurements, g 2τ, with g 2(0) as low as 0

Comparison of Reference Standards for Measurements of Optical-Fibre Power

October 1, 2000
Author(s)
S. V. Tikhomirov, A. I. Glazov, M. L. Kozatchenco, V. E. Kravtsov, A. B. Svetlichny, Igor Vayshenker, Thomas Scott, Douglas L. Franzen
National reference standards for determining optical-fibre power maintained by the National Institute of Standards and Technology (NIST, USA) and the All-Russian Research Institute for Optophysical Measurements (VNIIOFI, Russian Federation) were compared

High bandwidth-efficiency resonant cavity enhanced Schottky photodiodes for 800-850 nm wavelength operation

May 25, 1998
Author(s)
M. S. {Umlat}nl{umlat}, M. Gvkkavas, B. M. Onat, E. Ata, E. Vzbay, Richard Mirin, K. J. Knopp, Kristine A. Bertness, David H. Christensen
High-speed resonant cavity enhanced Schottky photodiodes operating in 800-850 nm wavelength region are demonstrated. The devices are fabricated in the AlGaAs/GaAs mate1ial system. The Schottky contact is a semitransparent Au film which also serves as the

Charge-transfer rate constants for N+/2 (v=0-4) with Ar at thermal energies

July 1, 1996
Author(s)
S Kato, J A. de Gouw, C D. Lin, V M. Bierbaum, S R. Leone
Rate constants for the charge-transfer reaction N 2 +(V)+ Ar>N 2+Ar + are measured at thermal energies as a function of initial vibrational excitation by laser-induced fluorescence. The reaction is slow for v=0, whereas the rate constants for v=1-4 are

Spin and Energy Analyzed Secondary Electron Emission from a Ferromagnet

July 5, 1982
Author(s)
John Unguris, Daniel T. Pierce, A Galejs, Robert Celotta
Measurements are presented of the energy dependence of the spin polarization of low-energy (0.5-25 eV) secondary electrons when a 500-eV primary beam is incident on an iron-based ferromagnetic glass. The polarization of the lowest-energy electrons is found

Engineering 3D Printed Scaffolds with Tunable Hydroxyapatite

June 15, 2022
Author(s)
Yoontae Kim, Eun Jin Lee, Anthony Kotula, Shozo Takagi, Laurence C. Chow, Styliani Alimperti
Bone grafting is a surgical procedure to bone repair due to trauma or diseases in the craniofacial and dental area. Current limitations of autogenous and allogeneic grafts are often associated with reduced host-graft integration due to geometrical confor

Sea turtles across the North Pacific are exposed to perfluoroalkyl substances

June 15, 2021
Author(s)
Cathryn Wood, George H. Balazs, Marc Rice, Thierry M. Work, T. T. Jones, Eleanor Sterling, Tammy Summers, John Brooker, Lauren Kurpita, Cheryl King, Jennifer Lynch
… and eggs from 12 Hawaiian hawksbill nests from 7 females were analyzed. Perfluorooctane sulfonate (PFOS) … were greater in hawksbill than green turtle plasma (p < 0.05), related to trophic differences. Green turtle plasma PFOS … were correlated with reduced emergence success (p < 0.05). Studies to further examine PFAS effects on sea turtle …

Facile fabrication and characterization of kraft lignin@Fe3O4 nanocomposites using pH driven precipitation: effects on increasing lignin content

April 1, 2021
Author(s)
Frankie A. Petrie, Justin Gorham, Robert T. Busch, Serhiy O. Leontsev, Esteban E. Urena-Benavides, Erick S. Vasquez
… magnetite (Fe3O4) nanoparticle colloidal suspension (pH 7) under constant mixing conditions, allowing the fabrication … a maximum methylene blue removal efficiency of 74.1% ± 7.1 %. Compared to previous studies, this work offers a …
Displaying 276 - 300 of 1184
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