MONDAY, APRIL 13

"Quasi-Periodic Schrodinger Equations," M. Goldstein, 3:30 p.m., 102 McAllister Building, Department of Mathematics (865-7527).

"Sexual Orientation, Repression, and Arresting Make-overs in the Microbial World" (Stone Memorial Lecture), Alexander Johnson, University of California at San Francisco, 4:00 p.m., 110 Wartik Laboratory, host: Joseph Reese, Department of Biochemistry and Molecular Biology (865-3072).

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

TUESDAY, APRIL 14

"Engineering the Secretion Pathway of Insect Cells," Michael J. Betenbaugh, Johns Hopkins University, 10:00 a.m., 140 Fenske Laboratory, host: Ali Borhan, Department of Chemical Engineering (865-7847).

"Diarylethanes as Molecular Optical Switches," Ben Martin, Penn State, 11:15 a.m., S-5 Osmond Laboratory, Department of Chemistry (865-4041).

"Modular Forms mod p," Dragos Chirica, Penn State, 1:00 p.m., 113 McAllister Building, Department of Mathematics (865-7527).

"Nonstandard Models of Arithmetic and Their Automorphism Groups," Roman Kossak, City University of New York, 2:30 p.m., 113 McAllister Building, Department of Mathematics (865-7527).

"J psi Suppression as a Signal for the Quark-Gluon Plasma" (elementary particles and fields), Cheuk-Yin Wong, Oak Ridge National Laboratory, 3:30 p.m., 339 Davey Laboratory, Department of Physics (865-7382).

"Attempts at Relating In-Vivo Folding of Proteins to the In-Vitro Process Through the Use of Circularly Permuted Polypeptide Chains," Howard Schachman, University of California at Berkeley, 4:00 p.m., 101 Thomas Building (with videoconferencing links to other campuses), Life Sciences Consortium (863-3650).

"Mathematical Models for the Design of Optic Filters in Digital Cameras," John Hamilton, Eastman Kodak Corporation, 4:00 p.m., 115 McAllister Building, Department of Mathematics (865-7527).

"Differential Rigidity of Homogenous Actions of Non-Uniform Lattices on Furstenburg Boundaries: I," Serge Yaskolko, Penn State, 6:00 p.m., 113 McAllister Building, Department of Mathematics (865-7527).

WEDNESDAY, APRIL 15

"Stable and Center Manifold Theorems for a Fixed Point: I," Boris Kalinin, Penn State, 10:30 a.m., 328E Health and Human Development East Building, Department of Mathematics (865-7527).

"Application of Sum Frequency Generation to Surface Analysis," Chad Meserole, Penn State, 11:15 a.m., S-5 Osmond Laboratory, Department of Chemistry (863-0119).

"Regulatory Mechanisms Involved in Touch-Induced Modifications in Plant Growth and Development," Richard N. Arteca, Penn State, 12:20 p.m., 106 Wartik Laboratory, Intercollege Graduate Program in Plant Physiology (865-0323).

THURSDAY, APRIL 16

"A Problem in Analytic Galois Theory," Bill Duke, Rutgers University, 11:15 a.m., 105 Osmond Laboratory, Department of Mathematics (865-7527).

"Cyclic-Type Cohomology Theories for Topological Algebras," Jacek Brodzki, University of Exeter (England), 11:15 a.m., 3 White Building, Department of Mathematics (865-7527).

"Genetic and Biochemical Characterization of JC Virus Early Proteins T'135, T'136, and T'165," Cindy Prins, Penn State, 11:15 a.m., 101 Althouse Laboratory, Department of Biochemistry and Molecular Biology (865-3072).

"Making DNA Fly: Electrophoresis in Thin Air," Lloyd M. Smith, University of Wisconsin at Madison, 12:15 p.m., S-5 Osmond Laboratory, Department of Chemistry (863-0889).

"High-Tc SQUIDS and Biology" (colloquium), John Clarke, University of California at Berkeley, 3:30 p.m., 101 Osmond Laboratory, Department of Physics (863-5350).

"Characterizing Transient Protein Folding Intermediates," Osman Bilsel, Penn State, 4:00 p.m., S-5 Osmond Laboratory, Department of Chemistry (863-0889).

"I/O Optimal Isosurface Extraction in Scientific Visualization," Yi-Jen Chiang, State University of New York at Stony Brook, 4:00 p.m., 302 Pond Laboratory, Department of Computer Science and Engineering (865-9505).

"Some Improved Procedures for Linear Mixed Models," Joseph Schafer, Penn State, 4:00 p.m., 201 Thomas Building, Department of Statistics (865-1348).

"Uniform Distribution in Number Theory" (colloquium), Bill Duke , Rutgers University, 4:30 p.m., 102 McAllister Building (refreshments at 4:00 p.m. in 212 McAllister Building), Department of Mathematics (865-7527).

"How Fast Can Nature Store Energy and What Are the Properties of Matter on the Nanometer Scale?" (Mylar Giri Lecture), M. A. El-Sayed, Georgia Institute of Technology, 7:00 p.m., 115 Graham Building at Penn State Hazelton, host: Mamoun M. Bader, Department of Chemistry (717-450-3385).

FRIDAY, APRIL 17

"Monte Carlo Simulation of Atomic Structure," Stuart Rothstein, Brock University, 2:30 p.m., S-5 Osmond Laboratory, Department of Chemistry (863-0119).

"Nonlinear Approximation and Solution Adaptivity," Peter Oswald, Bell Labs of Lucent Technologies, 3:30 p.m., 102 McAllister Building, Department of Mathematics (865-7527).

SATURDAY, APRIL 18

(none)

SUNDAY, APRIL 19

(none)

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