Michael Pahre, Hubble Postdoctoral Fellow, California In- 

 stitute of Technology. "A Multi-Color Search for Distant 

 Clusters of Galaxies." with John Huchra from February I, 

 1998 to January 31, 1999. 



Jesus Pelaez Alvarez, Visiting Scientist, Polytechnical University 

 of Madrid, Spain. "Dynamics/Tlectfodynamics Coupling in 

 the Bare-Tether System ProSEDS," with Enrico Lorenzini 

 from December 15, 1997 to August 31, 1998. 



Rosalba Pema, Predoctoral Fellow, Harvard University. "Search- 

 ing for Gamma-Ray Burst Remnants," with John 

 Raymond and Avi Loeb from August 1, 1998 to May 31, 

 1999. 



Raymond Piccoli, Visiting Scholar, Barles Nature Assocation, 

 France. "The Relationship Berween Radio and Optical 

 Astronomical Techniques," with Raymond Blundell from 

 January 1, 1998 to September 30, 1998. 



Jorge Sanz, Predoctoral Fellow, Complutense of Madrid, 

 Spain. "Multiwavelength Spectroscopy of Active Binaries," 

 with Andrea Dupree from September 1, 1998 ro August 31, 

 1999. 



Francesca Scire-Scappuzzo, Visiting Scientist, Massachusetts 

 Institute of Technology. "Multipath in High-Accuracy GPS 

 Positioning for Geodynamic Studies," with James Davis 

 from January 20, 1998 to January 19, 1999. 



Max Shurgalin, Visiting Scientist, Griffith University, 

 Australia. "Experimental Studies of Line Broadening in 

 Plasmas for Lighting," with Kate Kirby from March 23, 

 1998 to March 22, 1999. 



Rex T Skodje, Visiting Scientist, University of Colorado. 

 "Theoretical Studies of Low-Energy Atomic Collisions wirh 

 Surfaces," with Kate Kirby from September 1, 1998 to 

 February 28, 1999. 



Maarten C. Spaans, Hubble Postdoctoral Fellow, University of 

 Leiden. "The Structure of the Interstellar Medium in the 

 Milky Way and Distant Galaxies," with Alexander Dalgar- 

 no from October 1, 1997 to September 30, 1999. 



Vijaya Subramanian, Visiting Student, University of 

 Colorado. "Characterization of Threshold Effects in 

 Molecule-Surface Scattering," with Eric Heller from 

 September 1, 1998 to December 31, 1998. 



Ching-Hua Tseng, Visiting Scientist, Harvard University. 

 "Applications of Laser-Polarized Noble Gases for Quantum 

 Information Processing and Material Science," with Ronald 

 Walsworth from February 1, 1998 to January 31, 1999. 



Alberto Vasquez, Predoctoral Fellow, Univetsiry of Buenos 

 Aires. "Coronal Streamers and Slow Wind: UVCS Observa- 

 tions and Theoretical Modeling," with John Raymond 

 from November 1, 1997 to October 31, 1999. 



Barbara Whitney, Visiting Scientist, University of Wisconsin, 

 Madison. "Radiative Transfer Models of Pre-Main Sequence 

 Images and Spectral Energy Distributions," with Scott 

 Kenyon and Kenneth Wood from January 1, 1998 to 

 August 31, 1998. 



Jian-Min Yuan, Short-Term Visitor, Drexel University. "Clas- 

 sical and Quantum Behavior of Few-Body Atomic and 



Molecular Systems," with Eric Heller from April 15, 1998 to 

 July 15, 1998. 

 Bernard Zygelman, Visiting Scientist, University of Nevada, 

 Las Vegas. "Effective Gauge Potentials in Atomic Systems," 

 with Eric Hellet from August 1, 1998 to July 31, 1999. 



Smithsonian Center for Materials 

 Research and Education 



Angel D. Santiago-Torres, Senior Fellow in Latino Studies, 

 Museo de Arte de Ponce. "Analysis of Materials and Technl 

 ques in Puerto Rican Santos," with Donald Williams and 

 Marvette Perez from June 1, 1998 ro August 31, 1998. 



Smithsonian Environmental 

 Research Center 



Eike Breitbarth, Visiting Student, Norrheasrern University. 

 "The Role of Domestic Ballast Water Transport in the 

 Transfer of Nonindigenous Aquatic Species," with Gregory 

 Ruiz from April 15, 1998 to July 14, 1998. 



Cathleen A. Coss, Predoctoral Fellow, George Washington 

 University. "Transmission Dynamics and Parterns of 

 Perkinsus Infection in Chesapeake Bay Bivalves," with 

 Gregory Ruiz from June 1, 1998 to August 31, 1998. 



Jill M. Juhasz, Visiting Student, Northeastern University. 

 "Domestic Ballast Water Transport: A Potential Aid in the 

 Transfer of Nonindigenous Aquatic Species," with Gregory 

 Ruiz from June 15, 1998 to December 15, 1998. 



Romuald N. Lipcius, Senior Fellow, College of William and 

 Mary. "Source-sink Dynamics in a Marine Bivalve," with 

 Anson Hines and Gregory Ruiz from June 1, 1998 to 

 November 30, 1998. 



Elena G. Litchman, Postdoctoral Fellowship, University of 

 Minnesota. "Experimental Investigation of Factors Control- 

 ling UV Sensitivity of Phyroplankron in the Rhode River," 

 with Patrick Neale from December 15, 1997 ro January 14, 

 1999. 



Catherine E. Lovelock, Visiting Scientist, James Cook Univer- 

 sity. "Host and Environmental Controls on the Arbuscular 

 Mycorrhize Symbiosis in Tropical Forests," with Dennis 

 Whigham from March 1, 1998 ro April 30, 1999. 



Anne S. Marsh, Visiting Scientist, Yale Universiry. "Rising 

 CO, and Long-Term Carbon Storage in Terrestrial Ecosys- 

 tems: An Empirical Carbon Budget Validation," with Bert 

 Drake from November 1, 1997 to July 15, 1998. 



Rochelle Seitz, Postdoctoral Fellow, College of William and 

 Mary. "Top-down vs. Bottom-up Control in Clams and 



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