Non-allosteric ultrasensitive responses in signal transduction

Speaker: 

German Enciso

Institution: 

UC Irvine

Time: 

Friday, October 28, 2011 - 4:00pm

Location: 

mstb 120

A key phenomenon in the study of cell-to-cell communication and
protein regulation is the all-or-none, ultrasensitive dose response, which
transforms a continuous input into a digital output. Multisite systems are
often used in conjunction with allosteric effects to create such a behavior.
In this talk I describe a non-allosteric mechanism for a multisite system to
present strongly ultrasensitive behavior. Applications are given to protein
activation through multisite phosphorylation, clusters of receptors and DNA
regulation through histone modifications.

Resolution except for minimal singularities

Speaker: 

Professor Edward Bierstone

Institution: 

University of Toronto

Time: 

Friday, May 13, 2011 - 4:00pm

Location: 

MSTB 120

The talk will be in the general area of birational geometry. Can we find singular representatives of birational equivalence classes of algebraic varieties, with the simplest possible singularities? In particular, can we find the smallest class of singularities that necessarily persist after birational mappings that preserve smooth points and transverse self-intersections of the target spaces? Many of the questions considered were raised by Janos Kollar.

Curves, Surfaces, and Solitons

Speaker: 

Professor Chuu-Lian Terng

Institution: 

UCI

Time: 

Friday, January 28, 2011 - 4:00pm

Location: 

MSTB 120

The theory of soliton equations has been an active research area for the past forty-five years, with applications to algebra, geometry, mathematical physics, and applied mathematics. In this talk, I will explain how many of these equations arise as geometric evolution equations for curves and as the governing equations for surfaces in 3-space. In particular, I will use Quicktime movies and pictures produced in Palais' 3D-XplorMath mathematical visualization program to demonstrate properties of soliton equations and their associated geometric objects.

Seminar on Mathematics Teaching: Part I

Speaker: 

Sarah Eichhorn and Larry Chrystal

Institution: 

UCI

Time: 

Friday, October 1, 2010 - 4:00pm

Location: 

MSTB 120

This Friday will be mandatory only for graduate students who have been a TA for strictly less than two quarters. (ie. If you were a TA for two quarters or more last year or over the summer, you do not have to come this week!) This week we will be discussing several first week of class issues including: WebWorks, the Tutoring Center, and Dealing with Difficult Classroom Situations.

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