fields," with Alexander Dalgarno, from August I, 1991 to 

 May 31, 1992. 



Zdenek Ceplecha, Visiting Scientist, Czechoslovak Academy 

 of Sciences. "Atmospheric Fragmentation of Meteroids," 

 with Brian Marsden, from July 4, 1991 to April 26, 1991. 



Allan Shi-Chung Cheung, Visiting Scientist, University of 

 Hong Kong. "Predissociation line widths of the Schumann- 

 Runge bands of O z molecule," with W.H. Parkinson, from 

 July 7, 1991 to August 21, 1991. 



Robert Danen, SAO Predoctoral Fellow, University of Califor- 

 nia. "Mid-Infrared Imaging of Compact Sources," with E. 

 Bloemhof, from September 1, 1991 to August 31, 1992. 



Robert Donahue, SAO Predoctoral Fellow, New Mexico State 

 University. "Differential Rotation in a Sample of Cool 

 Stars," with Sallie Baliunas, from July 1, 1991 to June 30, 

 1992. 



John Dubinski, Postdoctoral Fellow, University of Toronto. 

 "Galaxy Formation: Dark Halos and the Formation and Dy- 

 namics of Galaxies," with W. Press from September 9, 1991 

 to September 8, 1993. 



Robert Forrey, SAO Predoctoral Fellow, University of Dela- 

 ware. "Calculation of Bethe Logarithms" with A. 

 Dalgarno, from September I, 1991 to February 28, 1992. 



Daniel O. Gomez, Postdoctoral Fellow, University of Buenos 

 Aires, Argentina. "Dynamical Processes in the Solar Co- 

 rona," with Petrus Martens and Leon Golub, from October 

 1, 1990 to September 30, 1991. 



Jose Gomez, Predoctoral Fellow, Universidad de Granada, 

 Spain. "Radioastronomy," with, from October 1, 1990 to 

 September 30, 1992. 



Mercedes Gomez, Predoctoral Fellow, National University of 

 Cordoba. "A Proper Motion Survey of Post-T Tauri Stars in 

 the Taurus-Auriga," with, from October 1, 1990 to August 

 31. 1991- 



Shawn Gordon, SAO Predoctoral Fellow, University of New 

 Mexico. "Long-Term Evolution of Supernova Remnants," 

 with John Raymond, from July 21, 1991 to July 20, 1992. 



Saiyid Hasan, Visiting Scientist, Indian Institute of Astro- 

 physics. "Radiative Transfer in Intense Flux Tubes on the 

 Sun," with Wolfgang Kalkofen, from August 1, 1991 to Jan- 

 uary 31, 1992. 



Roderick Jensen, Visiting Scientist, Yale University. "Quan- 

 tum Chaos," with A. Dalgarno, from September I, 1991 to 

 December 31, 1991. 



Victor H.S. Kwong, Visiting Scientist, University of Nevada. 

 "Measurement of A-values with the Ion Trap and Laser Fa- 

 cilities," with W.H. Parkinson, from August 1, 1991 to Jan- 

 uary 31, 1992. 



Jane Luu, Postdoctoral Fellow, Massachusetts Institute of 

 Technology. "The Primitive Bodies of the Solar System," 

 with Irwin Shapiro, from October 1, 1990 to September 30, 

 1992. 



Maxim Markevich, International Exchange Visitor, Space Re- 

 search Institute. "Fluctuations Imprinted by Hot Gas in 

 Clusters of Galaxies on the Cosmic Background Radia- 



tion," with William Forman, from October 22, 1990 to 

 April 22, 1991. 



P.M. Mathews, Visiting Scientist, University of Madras. "For- 

 mulation of the Elastogravitational Equations of Motion 

 for the Earth in the Presence of Dissipation," with Irwin 

 Shapiro, from July 21, 1991 to March 30, 1992. 



Vincent Mclntyre, Smithsonian Predoctoral Fellow, Univer- 

 sity of Wollongong. "Extended Bursts of Star Formations 

 in Irregular and Ring Galaxies," with John Huchra, from 

 November 1, 1990 to October 31, 1992. 



Jerry Mitrovica, Visiting Scientist, University of Toronto. 

 "Very-Long-Baseline Interferometry and Earth rheology," 

 with James Davis, from March 1, 1991 to September 30, 

 1991. 



John Morrison, Visiting Scientist, University of Louisville. 

 Theoretical Atomic and Molecular Physics," with A. 

 Dalgarno, from September I, 1991 to May 31, 1992. 



Herve Partouche, Visiting Student, Ecole Normale Superie- 

 ure, Paris. "Study of atomic procession millikelvin tempera- 

 tures beginning with the spin charge in alkali metals," 

 with A. Dalgarno, from January 1, 1991 to June 30, 1991. 



Leandros Perivolaropoulos, Postdoctoral Fellow, Btown Uni- 

 versity. "Macrophysics of Toplogical Defects," with G. 

 Field, from September 1, 1991 to October 31, 1993. 



Vladimir Popov, Visiting Scientist, Institute for Theoretical 

 and Experimental Physics, Moscow. "Theoretical Atomic 

 and Molecular Physics," with Alexander Dalgarno, from 

 September 24, 1991 to October 23, 1991. 



Michael Punch, Predoctoral Fellow, University College, 



Belfield. "Application of Transputer-Based Parallel Process- 

 ing in Gamma-Ray Astronomy," with Trevor Weekes, from 

 October 1, 1990 to September 30, 1991. 



Somak Raychaudhury, Postdoctoral Fellow, University of 

 Cambridge. "A Study of the Extragalactic Distance Scale 

 and the Large-scale Distribution of Galaxies in the Uni- 

 verse," with J. Huchra, from September 17, 1991 to Septem- 

 ber 16, 1993. 



Mary Beth Ruskai, Visiting Scientist, Univetsity of Lowell. 

 "Wavelets in Atomic and Molecular Physics," with A. 

 Dalgarno, January 1, 1991 to May 31, 1991. 



Dimitar Sasselov, Postdoctoral Fellow, University of Toronto. 

 "Study of Problems in Solar and Stellar Physics," with Andrea 

 K. Dupree, from October 1, 1990 to Septembet 30, 1992. 



Tony C. Scon, Visiting Scientist, University of Waterloo. 

 "Using the Polarization Wave Function for Systematically 

 Calculating the Exchange Enetgies (due to symmetty) in 

 Molecular," with A. Dalgarno, from September I, 1991 to 

 August 31, 1992. 



T.A.A. Sigut, SAO Predoctoral Fellow, University of Toronto. 

 "Electron Impact Excitation of Mgl and II," with A. 

 Dalgarno, from September 1, 1991 to August 31, 1992. 



David Syer, Visiting Student, University of Cambridge. "Stel- 

 lar Dynamical Aspects of Problems Involving Massive 

 Black Holes," with George Field, from September 1, 1991 to 

 May 31, 1992. 



4" 



