Jan

26

2015

We explore similarities between the roles of the vorticity in 3D Euler Equations and the perpendicular gradient of the solution to 2D Quasi-Geostrophic Equations. In particular we compare level sets of 2D QGE with vortex lines of 3D Euler, and also compare the integral representations of the velocity and symmetric strain matrix for both equations.

Jan

26

2015

Speaker: Dennis Garity

Abstract: This is the first of two talks on certain 3-manifolds that are increasing unions of solid tori. Recently, in a joint paper with Repovs and Wright, we produced infinite classes of such manifolds that were unions of 2 copies of 3-space, and infinite classes that were not such unions. In the first talk, I will introduce some of the background information needed including properties of manifolds that are increasing unions of tori and

some simple characterizations of 3-dimensional Euclidean space.

Jan

26

2015

This is a joint work with Kun Wang and Jian Deng.

Jan

27

2015

Vershik's adic transformations are defined on the path space of a Bratteli diagram, a nonstationary analogue of the graph of a subshift of finite type. They can be used to model many dynamical systems usually constructed in other ways, such as substitution dynamical systems, cutting and stacking constructions and interval exchange transformations. We classify the invariant measures which are finite for some subdiagram defined by erasing vertices and edges; these measures may be infinite on every open subset of the path space.

Jan

29

2015

This work addresses the problem of adaptive modulation and power in wireless systems with a strict delay constraint. Modulation and transmit power are dynamically adapted to minimize the outage probability for a fixed data rate. A discrete-time stationary Markov chain is used to model the time-varying channel. The problem is formulated as a finite-horizon MDP. The solution is a set of power/modulation allocation policies to be used during the transmission, as a function of the channel and system state. Numerical results show the benefits of such adaptation policies.

The Undergraduate Committee is pleased to announce that the revisions to our undergraduate Mathematics major program have received final OSU approval. For the online listing of the revised degree requirements see

http://catalog.oregonstate.edu/MajorDetail.aspx?major=560&college=08

The new major program is now in place for undergraduates entering our program during the 2015-2016 academic year. Students currently in our undergraduate program can choose between the old and new program in satisfying degree requirements.

The Undergraduate Committee thanks all faculty for their contributions in developing the revised program. ...

Be sure to attend the Winter Teaching & Advising Awards Tuesday, February 3!

Loyd E. Carter Award for Outstanding and Inspirational Teaching in Science – Undergraduate

Finalists: Linda Bruslind, Microbiology; Chris Coffin, Physics; Eli Meyer, Integrative Biology; Viviana Perez, Biochemistry and Biophysics; Devon Quick, Integrative Biology; David Wing, Mathematics

Loyd E. Carter Award for Outstanding and Inspirational Teaching in Science – Graduate

Finalists: Tory Hagen, Biochemistry and Biophysics; May Nyman, Chemistry; Weihong Qiu, Physics; Clayton Petsche, Mathematics; Tom Sharpton, Microbiology