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These videos are from seminars given in conjunction with the Computational Sciences Professional Master's Degree Program from Fall 2000 and Fall 2001. | |
 | Commodity Computing Miron Livny 10/24/00 The recent dramatic decrease in the cost-performance ratio of processing, storage and communication hardware has turned computing in to a commodity. Today, we can find powerful computing capabilities resting on office desks, piled on laboratory shelves or mounted on racks. These abundant computing and storage resources are managed by of-the-shelf software and are interconnected by high-speed networks. Individuals and small [ more ... ] |
 | Computational Techniques in Bioelectromagnetics: Medical Applications of the Finite-Difference Time-Domain Method Susan Hagness 10/3/00 The finite-difference time-domain (FDTD) method is one of the most powerful computational techniques for directly solving Maxwell's equations of electrodynamics. Advances in the computational power of high-performance workstations and supercomputers as well as the declining costs of computing have made the FDTD method a practical analytical and design tool for a variety of electromagnetic wave systems. In this talk, I will [ more ... ] |
 | Computing in Radiation Therapy T. Rockwell Mackie 10/17/00 Radiation therapy is the treatment of cancer with the use of ionizing radiation. Of any treatment modality, radiation therapy is the most computationally sophisticated. Three general areas of computation will be discussed; computation of radiation dose, radiotherapy optimization, and image-based verification of the delivered dose. Dose computation will be divided into analytic and stochastic approaches, with the Monte Carlo [ more ... ] |
 | If It Is Fast, It Must Be Newton's Method Dr. Richard Tapia 4/4/00 Throughout history mathematicians have proposed, modified, and tuned a particular new algorithm for solving a problem of interest. When the tuning process ends, often, inadvertently and unbeknownst to themselves and others, they have obtained a form of Newton's method. The speaker will discuss several instances of such activity from the ancient Greeks to the contemporary computational optimization. |
 | Informatics in Pharmaceutical R&D Sangtae Kim 12/3/01 The symbiotic emergence of the worldwide web and the Internet is one of the major developments of the final decade of the second millennium. It is thus not surprising that these same forces are creating significant challenges as well as opportunities in pharmaceutical research. This talk recognizes the interactions between the ongoing revolution in information technology (IT) and the dramatic changes in the profile of the [ more ... ] |
 | Large-Scale Parallel Computation of Nonlinear Electromagnetic Activity in Laboratory Plasmas Carl Sovinec 9/19/00 Modern experiments for magnetically confined fusion are capable of producing as much power as what is put into the system. However, progressing beyond this point will require a better understanding of the nonlinear electromagnetic behavior of the plasma. Large-scale collective modes and the resulting magnetic reconnection change the desirable onion-skin layering of toroidal magnetic surfaces, shorting-out some of the insulation [ more ... ] |
 | Mesh Generation for Parallel Model-Based Simulation: Problems, Progress and Plans Tim Tautges 12/12/00 Parallel computer speed and memory size have increased dramatically over the last decade, keeping pace with Moore's Law by doubling every year or so. With the help of the DOE ASCI program and other government-sponsored programs, parallel finite element analysis (FEA) applications have also improved dramatically. Combined with hardware improvements, these applications are now capable of simulating physical systems at unprecedented [ more ... ] |
 | Optimization of Gamma Knife Radiosurgery Mike Ferris 9/12/00 The Gamma Knife is a highly specialized treatment unit that provides an advanced stereotactic approach to the treatment of tumors, vascular malformations, and pain disorders within the head. Inside a shielded treatment unit, beams from 201 radioactive sources are focused so that they intersect at the same location in space, resulting in a spherical region of high dose referred to as a shot of radiation. The location and [ more ... ] |
 | Solving Stochastic Optimization Problems on Computational Grids Stephen J. Wright 11/7/01 We discuss a software tool called ATR (``asynchronous trust-region") for solving stochastic optimization problems on computational grids. We discuss computational experiments performed with ATR to find bounds on the optimal solutions of some difficult problems from the literature, obtained by solving many large sample-average approximations. We show too how optimality of computed solutions can be verified in some cases. [ more ... ] |
 | The Paradyn Parallel Performance Tool Project Bart Miller 11/14/00 Paradyn is a system for measuring the performance of parallel and distributed program. Paradyn contains two key technologies that allows it to measure large-scale, heterogeneous programs, without requiring source code modifications, recompiling, or even relinking, measure already-running programs (such as servers), and help automate the search for performance bottlenecks. The first technology is dynamic instrumentation, [ more ... ] |
 | Turbulence 101 and CFD Chris Rutland 11/7/00 Computational fluid dynamics (CFD) was one of the first uses for very large supercomputers, and is still a major application area for high performance computing. Historically, this was due to the importance of fluid flows for defense applications and to the ability to solve (at least almost) the equations. As defense needs have diminished and powerful computers have become plentiful, CFD has found a much broader range of [ more ... ] |
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