Guoqiang Tang, Visiting Scientist, Chalmers University of Technology. - 



"Differential VLBI Measurements on the Quasar 4C39.25," with Irwin 

 Shapiro, from June 15, 1989 to September 30, 1990. 



Han Uitenbroek, Visiting Scientist, Assistant Researcher. "Astrophysical 



Radiative Transfer Modeling with Partial Redistribution," with Eugene 

 Avrett, from June 1, 1990 to May 31, 1991. 



Shoba Veeraraghavan, Postdoctoral Fellow, University of California, Berkeley. 

 "Physical Cosmology, the Astrophysics-Cosmology-High Energy Physics 

 Interface, and Theoretical Astrophysics," with George Field, from 

 November 1, 1989 to October 31, 1990. 



Bogi Wang, Visiting Scientist, Harvard University. "The State of the Universe 

 at Redshift of the Order of Ten," with George Field, from November 1, 



1989 to June 30, 1990. 



Terry Whitaker, Visiting Student, University of Arizona. "Air Shower Array 



Data Analysis for Gamma Ray Sources," with Trevor Weekes, from June 18, 



1990 to May 31, 1991. 



David White, Predoctoral Fellow, University College of London. "Study of Hot 

 and Cold Gas in Early-Type Galaxies," with Irwin Shapiro, from November 

 1, 1989 to April 30, 1991. 



Bruce Wilking, Visiting Scientist, University of Missouri, St. Louis. "The 

 Initial Stellar Populations of Nearby Molecular Clouds," with Dr. 

 Charles Lada, from September 4, 1990 to September 3, 1991. 



Thomas Winter, Visiting Scientist, University of Wisconsin, Madison. 

 "Electron Transfer, Excitation, and Ionization in Ion-Atomic 

 Collisions," with A. Dalgarno, from September 1 through December 31, 

 1990. 



Mark G. Wolfire, Postdoctoral Fellow, University of Wisconsin, Madison. 



"Submillimeter Wavelength Telescope Array," with Paul T. P. Ho, from 

 September 1, 1990 to August 31, 1992. 



SMITHSONIAN ENVIRONMENTAL RESEARCH CENTER 



Lucia R. Dillenburg, Predoctoral Fellow, University of Maryland. "Competition 

 Between Temperate Forest Vine and Tree Species," with Dennis Whigham, 

 from June 1, 1990 to May 31, 1991. 



Joseph F. Dineen, Postdoctoral Fellow, University of Maryland. "Factors 

 Influencing Balanus Settlement Relevant to Adult Zonation in the 

 Chesapeake Bay," with Anson Hines, from October 1, 1989 to September 30, 

 1990. 



John R. Dolan, Postdoctoral Fellow, University of Maryland. "Carbon Flux in 

 the Rhode River Estuary: The Trophic Link Between Metazoan 

 Zooplankton, " with Charles Gallegos, from August 1, 1990 to July 31, 

 1991. 



59 



