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September 6, 2005
12:30-1:30
CSCAMM Library |
Organizational Meeting
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September 13, 2005
12:30-1:30
CSCAMM Seminar Room |
John Harlim - Efficient Strategies for implementing DBS on Digital Halftoning
Abstract:
The problem of digital halftoning is to approximate a full color image
with a less color image such that both images are indistinguishable when they
are looked from a distance. In this talk, a method called Direct Binary Search (DBS) will be introduced and implemented in an efficient manner.
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September 20, 2005
CSCAMM Workshop |
Meeting Canceled for CSCAMM Workshop High Frequency Wave Propagation
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September 27, 2005
12:30-1:30
CSCAMM Seminar Room |
Dr. George Stantchev - Scientific Visualization - A Glance Through the Digital Looking Glass
Abstract:
We will give a brief overview of scientific visualization, its
state-of-the-art techniques and emerging trends. We will discuss examples
from a variety of application areas and we will explore some feasible
scenarios for gaining access to the latest technologies.
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October 4, 2005
12:30-1:30
CSCAMM Seminar Room |
Scott Olson - Accounting for Topic Dependencies in Multi-Label Text Classification
Abstract:
In the past, text classification systems have traditionally made strong topic independence assumptions to simplify calculations and to reduce the number of model parameters which must be estimated from already sparse training data. In many classification settings, however, topic categories exhibit strong dependencies, and so it is expected that classifier performance might improve if the dependencies could be accounted for in the model. I'll begin with a quick overview of previous approaches to the multi-label problem and then introduce recent work to induce a supervised (multi-label respecting) linear mapping for documents into a low dimensional document subspace and, if time permits, a maximum entropy model which explicitly enforces topic correlations in the model distributions.
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October 11, 2005
12:30-1:30
CSCAMM Seminar Room |
Bing Zhang - Using Finite Difference Method to Price Barrier Options in Foreign
Abstract:
I will discuss how finite difference method is applied to price barrier options. A special model for modeling the foreign exchange rate is used to describe the dynamics. Under this model, the valuation PDE is essentially a 3 spatial dimensional heat equation.
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October 18, 2005
12:30-1:30
CSCAMM Seminar Room |
Dr. Margaret Shun Cheung - Effects of macromolecular crowding on folding kinetics and thermodynamics
Abstract:
Biomolecules carry out their functions at a very concentrated or crowded environment in the cell where the volume fraction of macromolecules, that include proteins, nucleic acids, lipid membranes, and cytoskeletons, could be up to 40% or more. Therefore, dynamics of biopolymers in a cell, or in vivo, could behave very much differently from that in a diluted test tube, or in vitro. In order to quantitatively understand the macromolecular crowding effects on protein folding problem, we use coarsely-grained models that physically capture interactions between crowders and a protein, and use high-performance computations and Brownian Dynamics to carry out large time-scale simulations. The folding rates of a model protein nonmonotonically increase with the volume fraction of the crowder. At lower volume fractions, the physics of depletion-induced attractions by crowders could be approximately mapped to the spherical confinement which destablizes denatured states by disallowing extended configurations longer than the pore size. However, at higher volume fractions, the conformational fluctuations of a protein may be susceptible to the shape of its confining environment. Thus, the approximation of spherical confinement to crowding effects may no longer be physical.
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October 25, 2005
12:30-1:30
CSCAMM Seminar Room |
Purnendu Chakraborty - Effect of organic coating on nanoparticles
Abstract:
Controlling particle size is a major challenge in the formation of nanoparticles. One of the approaches has been to coat the particle with a material that would prevent or retard particle agglomeration and coalescence. We're considering a model problem in which we investigate, using Molecular Dynamics, the effect of coating water droplets with fatty acid.
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November 1, 2005
12:30-1:30
CSCAMM Seminar Room |
Group Discussion - "You and Your Research" by Dr. Richard Hamming.
Abstract:
This talk centered on Hamming's observations and research on the question ``Why do so few scientists make significant contributions and so many are forgotten in the long run?'' We will discuss the observations made by Hamming. Transcript.
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