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650 results on '"Ramanathan, Anand"'

62. Spectroscopic measurements of a CO2 absorption line in an open vertical path using an airborne lidar

Author

Ramanathan, Anand, Mao, Jianping, Allan, Graham R, Riris, Haris, Weaver, Clark J, Hasselbrack, William E, Browell, Edward V, and Abshire, James B

Subjects
Physics - Atmospheric and Oceanic Physics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We use an airborne pulsed integrated path differential absorption lidar to make spectroscopic measurements of the pressure-induced line broadening and line center shift of atmospheric CO2 at the 1572.335 nm absorption line. We measure the absorption lineshape in the vertical column between the aircraft and ground. A comparison of our measured absorption lineshape to calculations based on HITRAN shows excellent agreement with the peak optical depth accurate to within 0.3%. Additionally, we measure changes in the line center position to within 5.2 MHz of calculations, and the absorption linewidth to within 0.6% of calculations., Comment: 4 pages, 4 figures, Submitted to Applied Physics Letters

Published
2013
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66. Partial-Transfer Absorption Imaging: A versatile technique for optimal imaging of ultracold gases

Author

Ramanathan, Anand, Muniz, Sérgio R., Wright, Kevin C., Anderson, Russell P., Phillips, William D., Helmerson, Kristian, and Campbell, Gretchen K.

Subjects
Physics - Atomic and Molecular Clusters, Condensed Matter - Quantum Gases, Physics - Atomic Physics, Physics - Optics
Abstract

Partial-transfer absorption imaging is a tool that enables optimal imaging of atomic clouds for a wide range of optical depths. In contrast to standard absorption imaging, the technique can be minimally-destructive and can be used to obtain multiple successive images of the same sample. The technique involves transferring a small fraction of the sample from an initial internal atomic state to an auxiliary state and subsequently imaging that fraction absorptively on a cycling transition. The atoms remaining in the initial state are essentially unaffected. We demonstrate the technique, discuss its applicability, and compare its performance as a minimally-destructive technique to that of phase-contrast imaging., Comment: 10 pages, 5 figures, submitted to Review of Scientific Instruments

Published
2012
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100. Homeobox Genes in Odontogenic Lesions: A Scoping Review

Author

Hii, Erica Pey Wen, primary, Ramanathan, Anand, additional, Pandarathodiyil, Anitha Krishnan, additional, Wong, Gou Rean, additional, Sekhar, E. V. Soma, additional, Binti Talib, Rozaidah, additional, Zaini, Zuraiza Mohamad, additional, and Zain, Rosnah Binti, additional

Published
2022
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