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Series: Other Talks

Over the past 30 years, researchers have developed successively faster
algorithms for the maximum flow problem. The best strongly polynomial
time algorithms have come very close to O(nm) time. Many researchers
have conjectured that O(nm) time is the "true" worst case running time.
We resolve the issue in two ways. First, we show how to solve the max
flow problem in O(nm) time. Second, we show that the running time is
even faster if m = O(n). In this case, the running time is O(n^2/log n).

Series: Other Talks

A discussion of the paper "Modeling and automation of sequencing-based characterization of RNA structure" by Aviran et al (PNAS, 2011).

Series: Other Talks

The general public lecture will be presented by Jason Cantarella (University of Georgia) entitled

The Square Peg Theorems or What does it mean to solve simultaneous equations? to take place in Klaus 1116 at 5:00PM

The Southeast Geometry Seminar is a series of semiannual one-day events focusing on geometric analysis. These events are hosted in rotation by the following institutions:
The University of Alabama at Birmingham;
The Georgia Institute of Technology;
Emory University;
The University of Tennessee Knoxville.
The following five speakers will give presentations on topics that include geometric analysis, and related fields, such as partial differential equations, general relativity, and geometric topology.
Jason Cantarella (University of Georgia);
Meredith Casey (The Georga Institute of Technology);
Kirk Lancaster (Wichita State University);
Junfang Li ( University of Alabama at Birmingham)
Jason Parsley (Wake Forest University);

Series: Other Talks

Georgia Tech School of Mathematics will host the 6th Annual Graduate Student Probability Conference (GSPC) from April 27-29, 2012. The conference is open to all graduate students and post-doctoral fellows interested in probability. The two keynote speakers this year are:
Professor Jean Bertoin, Universität Zürich;
Professor Craig Tracy, University of California

Series: Other Talks

A discussion of the paper "RNA folding with soft constraints: reconciliation of probing data and thermodynamic secondary structure prediction" by Washietl et al (NAR, 2012).

Series: Other Talks

A discussion of the paper "Evaluation of the information content of RNA structure mapping data for secondary structure prediction" by Quarrier et al (RNA, 2010).

Series: Other Talks

Host: Daniel Goldman, School of Physics

Guided by direct experiments on many-legged animals, mathematical models and physical models (robots), we postulate a hierarchical family of control loops that necessarily include constraints of the body's mechanics. At the lowest end of this neuromechanical hierarchy, we hypothesize the primacy of mechanical feedback - neural clocks exciting tuned muscles acting through chosen skeletal postures. Control algorithms appear embedded in the form and skeleton of the animal itself. The control potential of muscles must be realized through complex, viscoelastic bodies. Bodies can absorb and redirect energy for transitions. Tails can be used as inertial control devices. On top of this physical layer reside sensory feedback driven reflexes that increase an animal's stability further and, at the highest level, environmental sensing that operates on a stride-to-stride timescale to direct the animal's body. Most importantly, locomotion requires an effective interaction with the environment. Understanding control requires understanding the coupling to environment. Amazing feet permit creatures such as geckos to climb up walls at over meter per second without using claws, glue or suction - just molecular forces using hairy toes. Fundamental principles of animal locomotion have inspired the design of self-clearing dry adhesives and autonomous legged robots such as the Ariel, Mecho-gecko, Sprawl, RHex, RiSE and Stickybot that can aid in search and rescue, inspection, detection and exploration.

Series: Other Talks

Host: Turgay Uzer, School of Physics

Joseph Ford saw beauty in "Chaos" and the potential for ``villainous chaos" to be used in a constructive manner. His ideas have proved prescient. The talk will focus mainly on how chaotic dynamics may have played a key constructive -- rather than destructive -- role in shaping certain features of the Kuiper belt: in particular, the formation and properties of binary objects in the transneptunian part of the Solar System. Kuiper belt binaries stand out from other known binary objects in having a range of peculiar orbital and physical properties which may, actually, be the fingerprint of chaos in the primordial Kuiper belt. Understanding how these remote binaries formed may shed light on the formation and evolution of the Solar System itself.

Series: Other Talks

Hosts: Michael Schatz and Predrag Cvitanovic, School of Physics

Georgia Tech Workshop on Hamiltonian Dynamics and Chaos:
Ground Control to Niels Bohr: Exploring Outer Space with Atomic Physics.
Workshop Committee:
Cristel Chandre: Cristel.Chandre@cpt.univ-mrs.fr, Chair;
Predrag Cvitanović: predrag@gatech.edu;
Rafael de la Llave: rll6@math.gatech.edu;
Mike Schatz: michael.schatz@physics.gatech.edu

Series: Other Talks

A discussion of the paper "Understanding the Errors of SHAPE-Directed RNA Structure Modeling" by Kladwang et al (2011).