Department of Mathematics

The Florida State University

This Week in Mathematics

14 - 18 February 2000

Monday: 14 February 2000

Tuesday: 15 February 2000

Structural Biology/Biochemistry Seminar (Joint with MARTECH), 11:15 a.m., 555 IMB

Hank W. Bass, Florida State University

Ribosome-Interactivating Proteins (RIPs), an Ancient Class of Translational Inhibitors From Plants

Moduli Spaces Seminar, 2:00 p.m., 104 Love Building

Paolo Aluffi, Florida State University

Hilbert Schemes, IV

No Mathematics of Protein Structure & NMR Seminar, 3:00 p.m., A336 NHMFL

Applied Topology Seminar, 3:35 p.m., 104 Love Building

Javier Arsuaga, Florida State University

Equilibrium Distributions of Topological States in Circular DNA: Supercoiling and Knotting

Wednesday: 16 February 2000

No Graduate Student Seminar, 11:15 a.m., 204B Love Building

(Real) Analysis Seminar, 1:25 p.m., 204B Love Building

Denise Szecsei, Florida State University

A Convolution Property of Fractal Measures

Complex/Symbolic Seminar, 3:35 p.m., 102 Love Building

Craig Nolder, Florida State University

Quasiconformal Mappings

Thursday: 17 February 2000

Algebra Seminar, 2:00 p.m., 104 Love Building

Eric Klassen, Florida State University

Genus 2 Curves

QUANTUM! Seminar, 3:35 p.m., 104 Love Building

Phil Bowers, Florida State University

Algebraic Treatment of the Quantum Oscillator

Actuarial Seminar, 5:00 p.m., 204 Love Building

Amy Hayes, AFLAC

[ topic to be announced ]

Friday: 18 February 2000

Colloquium Coffee, 3:00 p.m., 204 Love Building
Colloquium, 3:30 p.m., 101 Love Building

Dan Stanescu, Concordia University, Canada

Spectral Methods in Computational Aeroacoustics

Spectral methods are well known for their high accuracy and low dissipation/dispersion properties, which should make them ideal candidates for Computational Aeroacoustics (CAA). The seminar will discuss CAA applications, with particular emphasis on turbofan tone radiation, of spectral methods that are based on dividing the computational domain in non-overlapping patches and discretizing the governing equations on each of them by a stand-alone spectral collocation method. The methods can practically handle geometries of any complexity once the patches themselves are given as an unstructured, finite element type, grid. The patches are then assembled together by imposing continuity of flow variables at their interfaces. Both a multi-domain (continuity explicitly imposed) method in the time domain and a spectral element (continuity implicitly imposed by projecting the governing equation on a vector space of functions continuous at the interfaces) method in the frequency domain will be presented. For time integration, low-storage Runge-Kutta methods of up to fourth order accuracy for nonlinear systems of ordinary differential equations and optimized for wave propagation are used. Results obtained for spinning mode radiation from engine inlets compare very well with analytical and experimental data. Some practical issues such as automatic grid generation via interaction with commercial packages, radiation boundary conditions and iterative complex matrix solvers versus domain decomposition will also be shortly addressed.

Chemistry Department Seminar, 3:30 p.m., 255 Fischer Lecture Hall

George L. McLendon, Chemistry, Princeton University

De Novo Designed Electron Transfer Proteins

Advances in protein design create a new era in which it is possible to create, de novo, protein architectures which resemble natural proteins. The next step is to endow such scaffolds with function: a "maquette" should be a working model. The deep knowledge of (protein) electron transfer makes this reaction eminently suited for structure function study, with the aim of designing new proteins with quantitatively predictable function. To this end, we have created a family of metal assembled three helix bundle proteins, which contain electron donor acceptor pairs separated by 1,2, or 3 helical turns. Path integral ("green path") methods predict these systems should differ in rate by 800 fold/turn and indeed, we find a rate progression of 750 fold/turn. Such results provide a strong validation of de novo design. We will briefly describe how such models, using self assembly, might be used to build "virtual libraries" for redox enzyme catalysis.

Joint Applied Mathematics & Scientific Computing Seminar, 4:30 p.m., 200 Love Building

[ Join the Departmental Colloquium ]

Actuarial Seminar, 5:00 p.m., 204 Love Building

Amy Hayes, AFLAC

Interviews with AFLAC

Seminars and colloquia at "that other" university [a.k.a. the University of Florida]

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