MONDAY, APRIL 27

(title to be announced,) Eduardo Blumwald, University of Toronto (Canada), 12:20 p.m., 111 Tyson Building, Intercollege Graduate Degree Program in Plant Physiology (865-0323).

"New Insights into Enzyme-Swinging Arms," John Cronan, University of Illinois at Urbana-Champaign, 4:00 p.m., 101 Althouse Laboratory, host: Greg Ferry, Department of Biochemistry and Molecular Biology (865-3072).

"Kontsevich Formality Theorem III," Dmitry Tamarkin, Penn State, 5:00 p.m., 306 Boucke Building, Department of Mathematics (865-7527).

TUESDAY, APRIL 28

"The Design and Synthesis of Nonpeptide Peptido Mimetics: From Neuropeptide Hormone Agonists and Antagonists to Inhibitors of Aspartic Acid Proteases," Amos B. Smith III, University of Pennsylvania, 12:15 p.m., S-5 Osmond Laboratory, Department of Chemistry (863-0889).

"Canonical Heights in Characteristic p," Matt Papanikolas, Brown University, 1:00 p.m., 113 McAllister Building, Department of Mathematics (865-7527).

"Helium Clusters: How Many Atoms Does it Take to Make a Fluid Super?," J. Peter Toennies, Max Planck Institut (Germany), 4:00 p.m., S-5 Osmond Laboratory, Department of Physics (865-6123).

"In-Vivo Studies of Troponin T in the Control of Muscle Contraction," Elizabeth Bucher, University of Pennsylvania, 4:00 p.m., 8 Mueller Laboratory, host: Sally Assmann, Department of Biology (863-9579).

"Mathematics and Computations for Mine Countermeasures," Bill Szymczak, Naval Research Laboratory, 4:00 p.m., 115 McAllister Building, Department of Mathematics (865-7527).

"Runtime Optimization of Parallel and Distributed Applications," Shamik Sharam, University of Maryland, 4:00 p.m., 302 Pond Laboratory, Department of Computer Science and Engineering (865-9505).

"Vitamin A and Pneumonia," Charles Stephenson, University of Alabama at Birmingham, 4:00 p.m., S-209 Henderson Building, Intercollege Graduate Program in Nutrition (865-3448).

WEDNESDAY, APRIL 29

"Lyapunov Functions and Stability of Geodesic Flows: I," Roland Gunesch, Penn State, 10:30 a.m., 328E Health and Human Development East Building, Department of Mathematics (865-7527).

"Informal Remarks on AdS/CFT Duality" (elementary particles and fields), John Schwarz, California Institute of Technology, 11:00 a.m., 339 Davey Laboratory, Department of Physics (865-4376).

"Surface Vibrational Spectroscopy of Interfacial Chemistry at Metal and Oxide Surfaces," Jeanne Pemberton, University of Arizona, 11:15 a.m., S-5 Osmond Laboratory, Department of Chemistry (863-0119).

"The Second Superstring Revolution" (colloquium), John Schwarz, California Institute of Technology, 3:30 p.m., 117 Osmond Laboratory, Department of Physics (865-4376).

"Supermassive Black Holes in Galactic Nuclei: Observational Evidence and Astrophysical Consequences," Luis Ho, Harvard-Smithsonian Center for Astrophysics, 4:00 p.m., 541 Davey Laboratory, host: Eric Feigelson, Department of Astronomy and Astrophysics (865-0418).

THURSDAY, APRIL 30

"The TVZ Bound Revisited," Hiren Maharaj, Penn State, 10:10 a.m., 113 McAllister Building, Department of Mathematics (865-7527).

"Moduli Spaces of Abelian Varieties in Positive Characteristic," Jeff Achter, University of Pennsylvania, 11:15 a.m., 105 Osmond Laboratory, Department of Mathematics (865-7527).

(title to be announced,) R. P. Worthington, Penn State, 11:15 a.m., 118 Agricultural Sciences and Industries Building, Department of Entomology (865-1895).

(title to be announced,) Rachel Hall, Penn State, 11:15 a.m., 3 White Building, Department of Mathematics (865-7527).

"Superspectroscopy: The Next Frontier in Elementary Particle Physics" (colloquium), Michael Peskin, Stanford University, 3:30 p.m., 101 Osmond Laboratory (863-0783). "Casson's Invariant and Gauge Theory: II," Augustin Banyaga, Penn State, 3:35 p.m., 113 McAllister Building, Department of Mathematics (865-7527).

"Natural History of Millbrook Marsh," Cheryl Lipton, Penn State, 3:45 p.m., 112 Buckhout Laboratory, host: Rob Brooks, Intercollege Graduate Program in Ecology (863-7221).

"Folding and Assembly of Protein Domains and Subdomains," Daniel Raleigh, State University of New York at Stoney Brook, 4:00 p.m., S-5 Osmond Laboratory, Department of Chemistry (863-0889).

"Galois Theory and Zeros of Zeta Functions" (colloquium), Kumar Murty, University of Toronto (Canada) and Harvard University, 4:30 p.m., 102 McAllister Building (refreshments in 212 McAllister Building at 4:00 p.m.), Department of Mathematics (865-7527).

FRIDAY, MAY 1

"Wall to Wall Supersymmetry Breaking" (elementary particles and fields), Michael Peskin, Stanford University, 11:00 a.m., 339 Davey Laboratory, Department of Physics (863-0783).

"Role in Assessing/Managing Risks to Human Health and the Environment," Jay Ellenberger, Environmental Protection Agency, 11:15 a.m., 118 Agricultural Sciences and Industries Building, host: E. Alan Cameron, Department of Entomology (865-1895).

"Nanoscale Materials," Tian Xie, Penn State, 2:30 p.m., S-5 Osmond Laboratory, Department of Chemistry (863-0119)

"Models of Neuronal Activity in the Visual Cortex," Michael Shelley, New York University, 3:30 p.m., 102 McAllister Building, Department of Mathematics (865-7527).

SATURDAY, MAY 2

"An Overview of Space Medicine Research: Findings and Technology Advances," Charles Marc Buntin, Johnson Space Center, 11:00 a.m., 102 Thomas Building, Pennsylvania Space Grant Consortium (863-5957).

SUNDAY, MAY 3

(none)

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