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You searched on: Topic Area: Physics Sorted by: title

Displaying records 21 to 30 of 319 records.
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21. Adapting the Poisson-Influenced K-Means Algorithm for a Larger User Base
Topic: Physics
Published: 11/19/2015
Authors: Brian P. Morris, Zachary H Levine
Abstract: A superconducting transition edge sensor (TES) can be a useful tool for counting the number of photons in a highly attenuated pulse of light, but it requires calibration for its outputs to be interpretable as photon numbers. The Poisson-Influenced K- ...

22. Advances in Coherent Population Trapping for Atomic Clocks
Topic: Physics
Published: 8/10/2010
Authors: John E Kitching, Vishal Shah
Abstract: We review advances in the field of coherent population trapping (CPT) over the last decade with respect to the application of this physical phenomenon to atomic frequency references. We provide an overview of both the basic phenomenon of coherent pop ...

23. Alpha-Dot or Not: Comparison of Two Single Atom Optical Clocks
Topic: Physics
Published: 10/5/2008
Authors: Till P Rosenband, David Hume, Chin-Wen Chou, J.C. Koelemeij, A. Brusch, Sarah Bickman, Windell Oskay, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, Nathan Reynolds Newbury, William C Swann, Wayne M Itano, David J Wineland, James C Bergquist
Abstract: Repeated measurements of the frequency ratio of Hg^u+^ and Al^u+^ single-atom optical clocks over the course of a year yield a constraint on the possible temporal variation of the fine-structure constant a. The time variation of the measured ratio c ...

24. An examination of spectral diversity of medical scenes for hyperspectral projection
Topic: Physics
Published: 2/14/2011
Author: David W Allen
Abstract: There are numerous medical conditions which may benefit from hyperspectral imaging. The imagers used for these conditions will need to have the performance validated to ensure consistency, gain acceptance and clear regulatory hurdles. NIST has been ...

25. Ancilla assisted calibration of a measuring apparatus
Topic: Physics
Published: 6/19/2012
Authors: Alan L Migdall, Giorgio Brida, L. Ciavarella, Ivo Pietro Degiovanni, Marco Genovese, M. G. Mingolla, M. G. A. Paris, Fabrizio Piacentini, S. V. Polyakov
Abstract: The rapid development of quantum systems has enabled a wide range of novel and innovative technologies, from quantum information processing to quantum etrology and imaging [1{13], mainly based on optical systems. Precise characterization techniques o ...

26. Andreev Reflections in Micrometer-Scale Normal Metal-Insulator-Superconductor Tunnel Junctions
Topic: Physics
Published: 11/24/2011
Authors: Peter J Lowell, Galen C O\'Neil, Jason M Underwood, Joel Nathan Ullom
Abstract: Understanding the subgap behavior of Normal-Insulator-Superconductor (NIS) tunnel junctions is important in order to be able to accurately model the thermal properties of the junctions. Hekking and Nazarov developed a theory in which the NIS sub gap ...

27. Atomic Physics in Ion Traps
Topic: Physics
Published: 3/1/1997
Authors: C Monroe, John J Bollinger
Abstract: Ion traps allow researchers to control the position and movement of charged particles with exquisite precision, and provide a powerful way to study many atomic phenomena.

28. Band Alignment of Metal-Oxide-Semiconductor Structure by Internal Photoemission Spectroscopy and Spectroscopic Ellipsometry
Topic: Physics
Published: 12/10/2010
Authors: Nhan V Nguyen, Oleg A Kirillov, John S Suehle
Abstract: In this paper, we will provide an overview of the internal photoemission (IPE) and the significance of this technique when combined with spectroscopic ellipsometry (SE) to investigate the interfacial electronic properties of heterostructures. In ...

Topic: Physics
Published: 6/19/2015
Authors: Bettye C Johnson, Steven W Brown, John Taylor Woodward IV, Keith R. Lykke, Giuseppe Zibordi
Abstract: The global Aerosol Robotic Network for Ocean Color (AERONET-OC) program utilizes AERONET CE-318 sun photometers (termed ,SeaPRISMsŠ) modified for in-air observations of ocean waters situated on oil drilling rigs, off-shore lighthouses, or other platf ...

30. CODATA Recommended Values of the Fundamental Physical Constants: 2010
Topic: Physics
Published: 3/1/2012
Authors: Peter J Mohr, Barry Norman Taylor, David B Newell
Abstract: This paper give the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. The 2010 adjustment takes in ...

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