Zobrazeno 41 - 50
of 79
pro vyhledávání: '"Sung-Jong Park"'
Publikováno v:
2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum.
Microwave frequency standards based on the 12.6 GHz ground state hyperfine transition in 171Yb+ have been under development at the National Measurement Institute, Australia, for many years. Using a laser-cooled ion cloud, the transition frequency was
Publikováno v:
Annals of Rehabilitation Medicine
Objective To evaluate whether repetitive transcranial magnetic stimulation (rTMS) could improve dysarthria in stroke patients at the subacute stage. Methods This study was a prospective, randomized, double-blind controlled trial. Patients who had uni
Publikováno v:
Proceedings of the 2005 IEEE International Frequency Control Symposium and Exposition, 2005..
Microwave frequency standards based on the 12.6 GHz ground state hyperfine transition in 171Yb+ have been under development at the National Measurement Institute, Australia, for many years. Using a laser-cooled ion cloud, the transition frequency was
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 47:245301
We report theoretical studies of an ef ficient accumulation of 225 Ra atoms in a magneto-optical trap (MOT) from an atomic beam. The number of atoms in the trap is limited due to the large leakage into metastable D states from the cooling transition
Publikováno v:
Journal of the Optical Society of America B. 31:2278
By numerically solving the density matrix equations, we show that the laser frequency ramping method by means of position-dependent Zeeman splitting can efficiently polarize nuclear spin of atoms/ions in an accelerator beamline. This minimizes a quan
Publikováno v:
Physical Review A. 71
A scheme of optical polarization modulation of a linearly polarized infrared probe field is studied in a degenerate four-level Yb atomic system. We have observed an anomalous transmission spectra of two circular polarization components of the probe f
Autor:
J. S. Thorn, P.T.H. Fisk, M.J. Wouters, R. B. Warrington, Sung Jong Park, M.A. Lawn, S. Quigg, A. Gajawecra
Publikováno v:
Proceedings of the 2005 IEEE International Frequency Control Symposium and Exposition, 2005..
The time and frequency group of the National Measurement Institute, Australia, (NMIA) maintains the Australian national standards for time of day and for frequency. Research and development activities of the group include: development of microwave fr
Publikováno v:
Physical Review A. 70
We report the observation of laser induced birefringence (LIB) in a wavelength-mismatched cascade system (J=0 \leftrightarrow J=1 \leftrightarrow J=0 transitions) of inhomogeneously broadened ytterbium atoms with strong pump and probe fields. We inve
Publikováno v:
Physical Review A. 69
The temporal evolution of coherent population trapping (CPT) was observed in rubidium atomic vapor when sudden changes were made to the detuning of a weak Raman field. The subsequent creation and destruction of CPT are caused by the temporal oscillat
Autor:
Soo Jin Chua, Sung-Jong Park, Yong-Woon Choi, Sung-Ho Hahm, Jung-Hee Lee, Wang Lian Shan, Heon-Bok Lee
Publikováno v:
Extended Abstracts of the 2004 International Conference on Solid State Devices and Materials.