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Displaying records 611 to 620 of 754 records.
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611. Standardization of Broadband UV Measurements
Topic: Physics
Published: 1/1/2013
Author: George P Eppeldauer
Abstract: The CIE standardized rectangular-shape UV response functions can be realized only with large spectral mismatch errors. The spectral power-distribution of UV sources is not standardized. Accordingly, the readings of different types of UV meters, even ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913173

612. Standardization of Broadband UV Measurements for 365 nm LED Sources
Series: Journal of Research (NIST JRES)
Report Number: 117.004
Topic: Physics
Published: 2/2/2012
Author: George P Eppeldauer
Abstract: Broadband UV measurements are analyzed when UV-A irradiance meters measure optical radiation from 365-nm sources. The CIE standardized rectangular-shape UV-A function can be realized only with large spectral mismatch errors. The spectral power-di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909003

613. State Discriminiation Signal Nulling Receivers
Topic: Physics
Published: 9/6/2011
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Sergey V Polyakov, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: Optimized state-discrimination receiver strategies for nonorthogonal states can improve the capacity of the communication channels operating with error rates below the ones corresponding to conventional receivers. Coherent signal-nulling receivers us ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909465

614. State Resolved THz Spectroscopy and Dynamics of Crystalline Peptide/Water Systems
Topic: Physics
Published: 7/11/2011
Authors: Zeeshan Ahmed, Shin G. Chou, Karen M. Siegrist, David F Plusquellic
Abstract: State resolved THz studies of crystalline peptides and their hydrates have provided precise measures of the infrared active phonon modes that reflect motions on the longest possible length scales in these systems. The impact of co-crystallized water ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907455

615. State-of-the-Art RF Signal Generation From Optical Frequency Division
Topic: Physics
Published: 9/2/2013
Authors: Archita Hati, Craig W Nelson, Corey Andrew Barnes, Danielle Grace Lirette, Tara Michele Fortier, Franklyn J Quinlan, Jason A. (Jason) DeSalvo, Andrew D Ludlow, Till P Rosenband, Scott A Diddams, David Allan Howe
Abstract: We present the design of a novel, ultra-low phase-noise frequency synthesizer implemented with extremely low noise regenerative frequency dividers. This synthesizer generates eight outputs viz. 1.6 GHz, 320 MHz, 160 MHz, 80 MHz, 40 MHz, 20 MHz, 10 MH ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911991

616. Status of a compact cold-atom CPT frequency standard
Topic: Physics
Published: 7/31/2011
Authors: Elizabeth A Donley, Francois-Xavier R. Esnault, John E Kitching, Eugene N Ivanov
Abstract: We describe the main progress towards the realization of a cold atom frequency standard based on coherent population trapping (CPT). We explain our particular CPT configuration and give details on the experimental setup.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908614

617. Steering a Time Scale
Topic: Physics
Published: 12/1/2008
Author: Judah Levine
Abstract: A time scale is a procedure for combining the data from an ensemble of clocks or frequency standards. The input data to the ensemble algorithm are generally the time (or frequency) differences between each of the members and the reference device for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901112

618. Stick-Slip Motion of a Stressed Ion Crystal
Topic: Physics
Published: 10/29/2001
Authors: T B Mitchell, John J Bollinger, Wayne M Itano, D HE Dubin
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105024

619. Stopwatch and Timer Calibrations (2009 edition)
Series: Special Publication (NIST SP)
Report Number: 960-12
Topic: Physics
Published: Date unknown
Authors: Jeff C Gust, Robert M. Graham, Michael A Lombardi
Abstract: Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology. Hundreds of United States laboratories calibrate many thousands of timing devices annually to meet legal and organizatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50659

620. Stray-light Correction of the Marine Optical Buoy, ed. by J.L. Mueller, G.S. Fargion and C.R. McClain
Topic: Physics
Published: 1/1/2003
Authors: Steven W Brown, Bettye C Johnson, S J Flora, M E Feinholz, M A Yarbrough, R A Barnes, Y S Kim, Keith R Lykke, D K Clark
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104335



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