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Displaying 1 - 25 of 319

Structural, Electronic, and Magnetic Properties of Heterofullerene C 48 B 12

July 1, 2003
Author(s)
Rui-Hua Xie, L Jensen, Garnett W. Bryant, J Zhao, V H. Smith
… vibrational and magnetic properties of heterofullerene C 48 B 12 are studied by first-principles calculations. … Infrared- and Raman-active vibrational frequencies of C 48 B 12 are assigned. Eight 13 C and two 11 B nuclear magnetic resonance (NMR) spectral lines of C 48 B 12 are characterized. The average second …

Electronic, Vibrational and Magnetic Properties of a Novel C 48 N 12 Aza-Fullerene

January 1, 2003
Author(s)
R H. Xie, Garnett W. Bryant, V H. Smith
… vibrational and magnetic properties of a novel C 48 N 12 aza-fullerene are studied by using density functional … this aza-fullerene are calculated. The HOMO-LUMO gap of C 48 N 12 is found to be about 1 eV smaller than that of C 60 . … and 10 NMR spectral signals are predicted for C 48 N 12 . Diamagnetic shielding factor, polarizability and …

Raman Scattering in C 60 and C 48 N 12 Aza-Fullerene: First-Principles Study

April 1, 2003
Author(s)
R H. Xie, Garnett W. Bryant, V H. Smith
… activity and Raman-active frequencies (RAF s) in C 48 N 12 aza-fullerene. Th results are compared with those of … 29 doubly degenerate unpolarized RAFs are predicted for C 48 N 12 . The RAF of the strongest Raman signal in the low- … regions and the lowest and highest RAF s for C 48 N 12 are almost the same as those of C 60 . The study of C …

Early Results From the NIST M48 CMM in the New AML Facility

March 3, 2006
Author(s)
John R. Stoup, Bryon S. Faust, Theodore D. Doiron
The Advanced Measurement Laboratory at NIST in Gaithersburg has already provided real, measurable improvement in some dimensional metrology measurement processes at NIST, most notably in the performance of the NIST Moore M48 coordinate measuring machine1

The 48th Annual Denver X-Ray Conference

February 19, 2017
Author(s)
Winnie Wong-Ng
The 48th Annual Denver X-ray Conference took place at Sheraton Steamboat Resort, Colorado, from August 2-6, 1999. This meeting was well attended, with a combined number of 650 conference attendees and exhibitors. It was supported by the International

Efficient Synthesis and HPLC-Based Characterization for Developing Vanadium-48-Labeled Vanadyl Acetylacetonate as a Novel Cancer Radiotracer for PET Imaging

February 9, 2024
Author(s)
Brittany Broder, Mohammed Bhuiyan, Richard Freifelder, David Rotsch, Satish Chitneni, Marvin William Makinen, Chin-Tu Chen
… preferentially sequestered in malignant tissue. Vanadium-48 (48V) generated with a compact medical cyclotron has been … We present an improved method to produce vanadium-48-labeled VO(acac)2, [48V]VO(acac)2, and characterize it … vanadium, vanadium-48, vanadyl acetylacetonate, high performance liquid …

First-Principles Calculations of Structural Electronic Vibrational and Magnetic Properties of C 60 and C 48 N 12 : A Comparative Study

February 1, 2003
Author(s)
Rui-Hua Xie, G C. Bryant, L Jensen, V H. Smith
… electronic, vibrational, and magnetic properties of the C 48 N 12 azafullerene and C 60 are comparatively studied from … are performed. Electronic structure calculations of C 48 N 12 show that the highest occupied molecular orbital … binding energy per atom and HOMO-LUMO energy gap of C 48 N 12 are about 1 eV smaller than those of C 60 . Because …

First-Principles Calculations of Structural, Electronic, Vibrational and Magnetic Properties of C 60 and C 48 N 12 : a Comparative Study

October 12, 2021
Author(s)
R H. Xie, Garnett W. Bryant, L Jensen, J Zhao, J H. Smith
… electronic, vibrational and magnetic properties of C 48 N 12 azafullerene and C 60 . Full geometrical optimization has shown that C 48 N 12 is characterized by several distinguish features: … analysis indicates that the doped nitrogen atoms in C 48 N 12 exist as electron acceptors and three-fourths of …

ASTM F48 Formation and Standards for Industrial Exoskeletons and Exosuits

March 19, 2019
Author(s)
William G. Billotte, Brian D. Lowe, Donald R. Peterson
Established in the fall of 2017, ASTM F48 is a technical committee that is addressing the need for standards related to wearable devices that augment, enable, assist, or enhance motion, posture, or physical activity – commonly referred to as “exoskeletons”

Towards Standard Exoskeleton Test Methods for Load Handling

May 9, 2019
Author(s)
Roger V. Bostelman, Ya-Shian Li-Baboud, Ann Virts, Soocheol Yoon, Mili Shah
Exoskeletons are now being marketed by several manufacturers and yet there are currently no standard test methods to compare exoskeletons to task. The National Institute of Standards and Technology (NIST) has been a key contributor to the formation of a

Measuring Step Gauges Using the NIST M48 CMM

April 1, 2011
Author(s)
John R. Stoup, Bryon S. Faust
The Moore M48 coordinate measuring machine (CMM) has provided NIST with flexible measurement capabilities for many years. The machine’s state of the art performance was further improved following the move of the machine into the new Advanced Measurement

Measuring Step Gauges Using the NIST M48 CMM

July 25, 2010
Author(s)
John R. Stoup, Bryon S. Faust
The Moore M48 coordinate measuring machine (CMM) has provided NIST with unique and very flexible measurement capabilities for many years. The machine’s state of the art performance was further improved following the move of the machine into the new

Towards a source of entangled photon pairs in gallium phosphide

May 9, 2019
Author(s)
Paulina S. Kuo, Peter G. Schunemann, Mackenzie Van Camp, Varun B. Verma, Thomas Gerrits, Sae Woo Nam, Richard P. Mirin
… down-conversion in orientation-patterned GaP. Pumped at 865 nm, the signal and idler are at 1350 nm and 2400 nm, …

Loss of 45 Da from a2 Ions and Preferential Loss of 48 Da from a2 Ions Containing Methionine in Peptide Ion Tandem Mass Spectra

January 29, 2011
Author(s)
Yamil Simon, Pedatsur Neta, Xiaoyu Yang, Stephen E. Stein
… if the a 2 ion contains methionine, a neutral loss of 48 Da, ascribed to CH 3 SH, predominates, and is followed by loss of formamide. The intensity of the a 2 -48 peak formed from XaaMet has a maximum value of 42% (of the … order of the residues is reversed to MetXaa the loss of 48 Da is much smaller. This effect can be used to determine …

Calibration in Multiconductor Transmission Lines

December 1, 1996
Author(s)
Dylan F. Williams
Abstract: This paper presents a calibration and measurement method for circuits embedded in lossy printed multiconductor transmission lines. The experimental results illustrate the complexity of the modal representation and the utility of the conductor

Accuracy and Versatility of the NIST M48 Coordinate Measuring Machine

October 1, 2001
Author(s)
John R. Stoup, Theodore D. Doiron
The NIST Is continuing to develop the ability to perform accurate, traceable measurements on a wide range of artifacts using a very precise, error-mapped coordinate measuring machine (CMM). The NIST M48 CMM has promised accuracy and versatility for many

Preliminary observations of the April 5th, 2024, Mw4.8 New Jersey Earthquake

October 1, 2024
Author(s)
Oliver Boyd, William Barnhart, James Bourke, Martin Chapman, Paul Earle, Guo-chin Dino Huang, Jessica Thompson Jobe, Won-Young Kim, Frederik Link, Mairi Litherland, Andrew Lloyd, Maureen D. Long, Sara McBride, Andrew Michael, Walter Mooney, Gregory Mountain, Aspasia Nikolaou, Alexandros Savvaidis, Felix Waldhauser, Cecily Wolfe, Clara Yoon
… April 5, 2024, at 10:23 am local time, a moment magnitude 4.8 earthquake struck Tewksbury Township, NJ, about 65 km …

Superconducting Nanowire Single-Photon Detector Arrays for the Near- to Mid-Infrared

October 31, 2023
Author(s)
Benedikt Hampel, Richard Mirin, Sae Woo Nam, Varun Verma
Superconducting Nanowire Single-Photon Detectors (SNSPDs) are excellent devices for the analysis of faint light from the ultraviolet to the mid-infrared. Recent developments push their broad wavelength bandwidth further into the mid-infrared towards 20 μm

Guide to Securing Legacy IEEE 802.11 Wireless Networks

July 25, 2008
Author(s)
Karen A. Scarfone, Derrick Dicoi, Matt Sexton, Cyrus Tibbs
… makes recommendations for their use. [Supersedes SP 800-48 (November 2002): … Special Publication (NIST SP) - 800-48 Rev 1 …
Displaying 1 - 25 of 319
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