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Displaying 451 - 475 of 1005

Frequency Measurements of Al+ and Hg+ Optical Standards

June 8, 2009
Author(s)
Wayne M. Itano, James C. Bergquist, Till P. Rosenband, David J. Wineland, David Hume, Chin-wen Chou, Steven R. Jefferts, Thomas P. Heavner, Tom Parker, Scott Diddams, Tara Fortier
… have absolute reproducibilities of a few parts in 10 17 . This is about an order of magnitude better than the …

Al, B, and Ga Ion-Implantation Doping of SiC

November 1, 2000
Author(s)
E Handy, M V. Rao, O W. Holland, P Chi, K A. Jones, M A. Derenge, R D. Vispute, T Venkatesan
… ion implants were performed in the energy range 50 keV - 4 MeV into 6H-SiC to characterize the implant depth profiles … concentration of 7 x 10 16 cm -3 was achieved for 1 x 10 17 cm -3 Al implantation. …

Ferromagnetic Resonance Detection with a Torsion-mode Atomic-force Microscope

February 1, 2000
Author(s)
M. Loehndorf, John M. Moreland, Pavel Kabos
We have developed a ferromagnetic resonance (FMR) instrument based on a torsion-mode atomic-force microscope (AFM). The instrument measures the torque on a magnetized thin film in a static out-of-plane field perpendicular to the film surface. The magnetic

Kinetic Studies of the Reactions of IO Radicals Determined by Cavity Ring-Down Spectroscopy

July 14, 1999
Author(s)
D B. Atkinson, Jeffrey W. Hudgens, A J. Orr-Ewing
… ± 2 x 10 -12 cm 3 molecule -1 s -1 , k(IO + IO) = 1.0 ± 0.4 x 10 -10 cm 3 molecule -1 s -1 , and k(IO + NO) = 1.9 ± 0.5 … -11 cm 3 molecule -1 s -1 at the pressures of 1250 Pa (9.4 Torr) and 4000 Pa (30.1 Torr). For the IO A 2 Π 3/2 - X 2 Π … an absorption cross-section, ς = 7.3 ± 0.7 x 10 -17 cm 2 . Error limits indicate the confidence of two …

Validation of Aerosol Dynamics in a Well-Stirred Isothermal Enclosure

September 30, 2021
Author(s)
Amy Mensch, Thomas Cleary
Modeling of aerosol dynamics in fire simulations enables predictions of the effects of soot, such as visibility and detection, and the fate of soot, such as deposition and emissions. NIST's fire modeling tool, Fire Dynamics Simulator (FDS), has implemented

Supplement 2 to the 2004 update of the AAPM Task Group No. 43 1 Report: Joint recommendations by the AAPM and GEC-ESTRO

September 30, 2017
Author(s)
Michael G. Mitch, Mark J. Rivard, Facundo Ballester, Wayne M. Butler, Larry A. DeWerd, Geoffrey S. Ibbott, Christopher Melhus
Since publication of the 2004 update to the American Association of Physicists in Medicine (AAPM) Task Group No. 43 Report (TG-43U1) and its 2007 supplement (TG-43U1S1), several new low- energy photon-emitting brachytherapy sources have become available

Formation of Macropores in Calcium Phosphate Cement Implants

February 1, 2001
Author(s)
Shozo Takagi, Laurence C. Chow
… in CPC. Sucrose granules, NaHCO 3 , and Na 2 HPO 4 were sieved to obtain particle sizes in the range of 125 m … powder (an equimolar mixture of tetracalcium phosphate, Ca 4 (PO 4 ) 2 O, and dicalcium phosphate anhydrous, CaHPO 4 ) and one …

Energy Impacts of Infiltration and Ventilation in U.S. Office Buildings Using Multizone Airflow Simulation

June 1, 1999
Author(s)
Andrew K. Persily, Steven J. Emmerich
… is responsible for 25% of the heating load and 4% of the cooling load due to the higher levels of … that heating and cooling energy use due to ventilation is 17 PJ at a rate of 2.5 L/s (5 cfm) per person and 138 PJ at … is also estimated that energy use due to ventilation is 17 PJ at a rate of 2.5 L/s (5cfm) per person and 138 PJ at 10 …

HCI Reduced Barriers in Magnetic Tunnel Junctions

December 7, 2008
Author(s)
Joshua M. Pomeroy, Holger Grube
In this paper, the use of tunnel junctions as sensors for determining the interaction strength between highly charged ions (HCIs) and ultra-thin insulating films is experimentally explored. HCIs are known to strongly ablate insulating materials upon
Displaying 451 - 475 of 1005
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