| Title | TBA |
| Speaker |
TBA |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
| Title | Deoxyribozyme-based decision-making networks: Logic gates, circuits and automata |
| Speaker |
Milan Stojanovic |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
Abstract
Deoxyribozymes are nucleic acid enzymes. Using modular design, deoxyribozymes may be turned into sensors for oligonucleo-tides. Extending this principle, a complete set of logic gates can be constructed, with oligonucleotides with inputs and catalytic chemical reaction as an output. These logic gates could be arranged into solution-phase circuits and automata, capable of more complex Boolean calculations.
| Title | TBA |
| Speaker |
TBA |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
| Title | When will it happen? "Stopping Time" and "Concentration |
| Speaker |
Professor Greg McColm |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
Abstract
Many phenomena involve a scientist waiting to see WHEN something will happen. The time WHEN it happens is called the "stopping time," as that is when the scientist can stop waiting.
Some phenomena are actually complexes of many simpler phenomena, and what we are waiting for is some global event that is a consequence of many local events. The question is: how predictable is the time the global event occurs?
We will look at some of the examples, issues and outstanding problems in this area.
NOTE: This presentation will be designed to be accessible to non-mathematicians.
| Title | Dispersal Ecology: Why it's Important Biologically, and Why and Where Current Models Fail |
| Speaker | Professor Gordon Fox Department of Biology |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
Abstract
TBA
| Title | Bifurcation of Kidney Hemodynamics in Hypertension |
| Speaker | Daniel Yip Department of Physiology and Biophysics |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
Abstract
Each rat kidney is composed of 250,000-500,000
functional subunits called nephron. Each nephron is a limited
cycle oscillator coupled to adjacent nephrons that supplied
by the same cortical radial artery. The oscillations are due
to the time delays and intrinsic nonlinearity in the intra-nephron feedback loop,
tubuloglomerular feedback. Oscillations
of 30 mHz are found in hydraulic pressure, flow and chloride
concentrations within each nephron. The oscillations become
aperiodic in animal with genetic hypertension, or experimentally induced hypertension.
The time series of these apparent
random fluctuations bear some characteristic of deterministic
chaos. Using non-invasive laser doppler velocimetry to monitor
the spontaneous variations of blood flow in a single nephron.
We detected a fast oscillation (100-150 mHz) superimposes on
top of the tubuloglomerular feedback mediated oscillations
(30 mHz). We suggested that these two oscillatory mechanisms
interact in a nonlinear manner, and that development of
hypertension alters this interaction and leads to the
bifurcation of kidney hemodynamics.
| Title | Mathematical Models for Recombinant DNA Processes |
| Speaker | Natasha Jonoska and Masahico Saito Department of Mathematics |
| Time | 1:00-2:00 p.m. |
| Place | SCA 202 |
Abstract
We will present a mathematical observation about how knot theory could give a possible explanation for actions of topoisomerases. We also present another mathematical observation about possible use of formal language theory in explaining the gene assembly in ciliates. We hope to start a discussion about these and other genetic processes that could be explained by some of these techniques.
Please direct questions to mthmaster@nosferatu.cas.usf.edu.
Last updated: 14-Nov-2003.
Copyright © 2000, USF Department of Mathematics.