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Displaying 1 - 25 of 473

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 …

Correlation Between Morphology and Device Performance of pBTTT:PC 71 BM Solar Cells

October 1, 2016
Author(s)
Wenluan Zhang, Hao Shen, Brett W. Guralnick, Brian Kirby, Ngoc A. Nguyen, Roddel Remy, Charles Majkrzak, Michael E. Mackay
… Phenyl-C 71 -butyric acid methyl ester (PC 71 BM) could intercalate between the side-chains of … so optimal solar cell performance was obtained at high PC 71 BM concentrations promoting phase separated electron … Between Morphology and Device Performance of pBTTT:PC 71 BM Solar Cells …

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”

Related-Key Slide Attacks on Block Ciphers with Secret Components

September 18, 2013
Author(s)
Meltem Sonmez Turan
… encryption algorithm specified and approved in NRS 009-6-7:2002 by Electricity Suppliers Liaison Committee to be used … four scenarios; (i) known S-box and permutation with 2 48 time complexity using 2 16 + 1 chosen plaintexts; (ii) … and known permutation with 2 55 time complexity using 2 22.71 + 1 chosen plaintexts; (iii) known S-box and unknown …

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

Quasielastic neutron scattering study of hydrogen motion in NbC(0.71)H(0.28)

March 30, 2009
Author(s)
Terrence J. Udovic, Jeremy Cook, Alexander Skripov, Reinhard Hempelmann, Andrey Rempel, Aleksandr Gusev
… neutron scattering (QENS) measurements for NbC(0.71)H(0.28) over the temperature range 11- 475 K. Our results … neutron scattering study of hydrogen motion in NbC(0.71)H(0.28) …

A 110 GHz Comb Generator in a 250 nm InP HBT Technology

April 18, 2022
Author(s)
Jerome Cheron, Dylan Williams, Richard Chamberlin, Miguel Urteaga, Paul D. Hale, Rob Jones, Ari Feldman
… generator capable of producing a repetitive narrow pulse (7.1 ps pulse duration) with sharp edges (4.2 ps falling … the circuit reference plane. We measured a pulse width of 7.1 ps and a peak amplitude of -0.333 V. In the frequency domain, the comb generator provides -48.7 dBm of output power at 110 GHz when the circuit is fed …

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

0:45 Surface Color

January 1, 2008
Author(s)
Maria E. Nadal, E A. Early, Robert R. Bousquet
… This document, SP250-71 (2007), NIST Measurements Services: 0:45 Surface Color, … Special Publication (NIST SP) - 250-71 …

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 …

Green Bank Telescope (GBT) Observations of Interstellar Glycolaldehyde: Low Temperature Sugar

September 1, 2004
Author(s)
J M. Hollis, P R. Jewell, Francis J. Lovas, A Remijan
… and 4d13^-4d04 rotational transitions at 13.48, 15.18, 17.98, and 22.14 GHz, respectively. An analysis of … with the NRAO 12 m telescope at millimeter wavelengths (71-103 GHz) are characterized by a state temperature of 50K. … are surprisingly strong and are seen in emission at 13.48 GHz, emission and absorption at 17.98 and 22.14 GHz. We …

Correlation of Nano-morphology with Structural and Spectroscopic Studies in Organic Solar Cells

October 27, 2020
Author(s)
Eliot Gann, Christopher McNeill, Wenchao Huang, Dinesh Kabra, Urvashi Bothra, Nakul Jain, Amelia C. Liu
The nano-morphology of bulk heterojunction blends based on poly[[4,8-bis[(2- ethylhexyl)oxy]benzo[1,2-b:4,5- b']dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7) blended with [6,6]- phenyl-C71-butyric acid methyl
Displaying 1 - 25 of 473
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