RESEARCH INTERESTS
Theoretical direct methods, new probabilistic theory and computational procedures for global direct mehods phasing, as opposed to the sequential or incremental direct methods presently in use, new development of the algebra of phase invariants, and new direct methods approaches to phasing using anomalous scattering data.

SELECTED AWARDS, HONORS, & INVITED LECTURES

• Invited Reviewer, Mathematical Reviews, Ann Arbor, MI, 1984-present
• National Award for Scientific and Technological Progress, Beijing, China (1987)
• Invited Lecturer: Dept. of Chemistry, Rutgers University, New Jersey (1985)

PREVIOUS POSITIONS
1966-1983, Assistant and Lecturer, X-Ray Group, Jilin University, Changchun, P. R. China
1983-1989, Associate Professor, Jilin university, Changchun, P. R. China
1984-1990, Hauptman-Woodward Institute, (1984-86, Special Research Fellow;
1989-1990, Adjunct Research Scientist)
1990-1991, Computer programmer, B. A. Frenz & Associates Inc., College Station, TX

SELECTED PUBLICATIONS
Dr. Guo,s publications include 51 papers, 28 abstracts, 2 chapters, and 1 book.

• Guo, D. Y., et al., "Crystal Structure of N' - (2-Tetrahydrofuranyl) - 5 - Fluorouracil, Scientia Sinica (English Edition) B10, 1009-1013 (1983).
• Guo, D. Y., Blessing, R. H., Langs, D. A., and Hauptman, H. A., On Integrating the Techniques of Direct Methods with Anomalous Dispersion. IV. A Simplified Perturbation Treatment for SAS Phasing, Acta Cryst., A53, 74-83 (1997)
• Guo, D. Y., Blessing, R. H., Langs, D. A., and Smith, G. D., On "Globbicity" of low Resolution Protein Structures, Acta Cryst., D55, 230-237 (1999).
• Guo, D. Y., Blessing, R. H., Langs, D. A., Bulk Solvent Correction in Direct Methods Phasing, Acta Cryst., D56, 451-457 (2000).
• Guo, D. Y., Blessing, R. H., Langs, D. A., Globbic Approximation in Low-resolution Direct Methods Phasing, Acta Cryst. D56, 1148-1155 (2000).
• R. H. Blessing, D. Y. Guo and D. A. Langs, Statistical Expectation Value of the Debye-Waller Factor and E(hkl) Values for Macromolecular Crystals. Acta Cryst. D52 257-266 (1996)
• David A. Langs, Robert H. Blessing and D. Y. Guo, Progress on the Direct-Methods Solution of Macromolecular Structures Using Single-Wavelength Anomalous-Dispersion (SAS) Data. Acta Cryst. A55, 755-760 (1999)
• H. A. Hauptman, D. Y. Guo, H. Xu and Robert H. Blessing, Algebraic Direct Methods for few-atoms structure models. Acta Cryst., A58, 361-369 (2000).