# The 2005 SIAM Annual Meeting

Over 800 people attended the 2005 annual meeting of the Society for Industrial and Applied Mathematics (SIAM) in New Orleans, July 11-15. Hurricane Dennis had little effect on New Orleans, but it did affect other areas in the southeastern U.S., and caused some people to change their travel plans. Below are descriptions of some of the events that took place at the meeting.

*Simulation-Based Medicine: Predicting Outcomes of Cardiovascular Interventions*, **Charles A. Taylor**, Stanford University

Cardiovascular disease is the leading cause of death in industrialized nations and is predicted to be the leading cause of death in developing nations by 2010. Yet there are few tools to predict outcomes of techniques such as bypass surgery or angioplasty. Taylor spoke about modeling blood flow and the challenges associated with creating good models of blood flow. There is a great deal of data collected from a patient, so that eventually that data could be used to form pre-operative models, plan a medical intervention, and then simulate the effects of the intervention.

*New "Dimensions" in Genome Annotation*, **Bernhard Palsson**, University of California, San Diego

The sequencing of the human genome is one-dimensional in nature, even though it was a monumental task. Palsson explained other dimensions involved in our genome and those of other organisms. Most of the talk dealt with problems in two dimensions, essentially reconstructing biological networks using graphs and matrices. In this case, the topological properties of the networks are not as important as their functional states. To illustrate this point, Palsson used the analogy of a city's road map: Its topological properties are the same at 4 a.m. and 4 p.m., yet the behavior of the transportation system at the two times is likely to be very different. In regard to other dimensions, Palsson said that genomes are curled-up three-dimensional structures, and as they change in time their study incorporates four dimensions.

*Past President's Address: How Mathematical Modeling and Analysis Impacts Our Lives*, **Mac Hyman**, Los Alamos National Laboratory

In this address, former SIAM president Mac Hyman gave several examples of applications of mathematics to weather, biology, design, hardware, and software. Hurricanes were on the minds of many attendees and Hyman stated that evacuating a mile of coastline in the U.S. costs $1 million a day. Better weather and climate models would lead to better forecasting and more effective evacuations. Hyman also noted how math has been used to build models of power grids for phased-in resumption of service after a hurricane. He pointed out how a model was very successful restoring power after Hurricane Jeanne in 2004. Hyman is involved in the TRANSIMS model which uses vast amounts of data gathered from residents of Portland, Oregon to model movement in a city. One of the many uses of TRANSIMS is modeling the spread of disease in a city. Researchers found that individuals changing their habits (such as electing to say inside) during an outbreak is one of the most effective ways of controlling an epidemic. Previous outbreak models had to assume that individual behavior remained unchanged during an outbreak. Hyman finished his address with a description of the changes in computer hardware over the years and said that if other goods' costs had decreased as much as the cost of computing power, then it would now be feasible to heat our homes with peanut butter.

*The John von Neumann Lecture: Geometry and Computational Dynamics*, **Jerrold E. Marsden**, California Institute of Technology

*Draping, Wrinkling and Crumpling: Geometry and Physics*, **L. Mahadevan**, Harvard University

Mahadevan gave a high-energy lecture, first noting how wrinkles form when a material drapes because the material is trying to hang perfectly vertically, but can't. He then showed wrinkling at different scales, from those in mountains to wrinkles in a gel with widths of 10^{-7}m. Mahadevan demonstrated how wrinkles form in Saran Wrap, noting the conflict between stretching and bending. Many of the calculations used Gaussian curvature. Crumpling is much harder to model. Mahadevan concluded his talk with a verse (with apologies to Jonathan Swift):

Big crumples fold into little crumples

That store energy in bending

And little crumples have lesser crumples

And so on to stretching.

Gilbert Strang, who introduced Mahadevan, noted that he had never liked Saran Wrap and always thought that it was his fault that Saran Wrap wrinkled, but now he knew it was Gauss's fault.

*Numerical Solution of Nonlinear Eigenvalue Problems: How Numerical Linear Algebra Can Make a Difference*, **Volker Mehrmann**, Technische Universitaet Berlin

*Control of Advanced Automotive Engines*, **Mrdjan Jankovic**, Ford Motor Company

Jankovic explained that in modern cars, computers control the engine, transmission, brakes, traction, and deployment of air bags. Technology has enabled lower emissions--by maintaining proper air/fuel ratios--and optimized performance and fuel economy--through the addition of new devices. Gathering data to improve performance in an operating car is not feasible in all situations because some calculations can't be done fast enough for control devices to adapt, but Jankovic did show how a method he used makes sampling more efficient.

*Prizes and Awards Luncheon*

SIAM President Martin Golubitsky hosted this luncheon and handed out the following prizes and awards:

*I.E. Block Community Lecture*:**Christopher R. Johnson**, University of Utah*Ralph E. Kleinman Prize*:**Stanley J. Osher**, University of California, Los Angeles*Assocation for Women in Mathematics-SIAM Sonia Kovalevsky Lecture*:**Ingrid Daubechies**, Princeton University*W.T. and Idalia Reid Prize*:**Christopher I. Byrnes**, Washington University in St. Louis*SIAM Activity Group on Control and Systems Theory Prize*:**Pablo A. Parrilo**, Massachusetts Institute of Technology*SIAM Award in the Mathematical Contest in Modeling*: Continuous Problem:**Clay Hambrick**,**Katrina Lewis**, and**Lorraine Thomas**(students),**Jon T. Jacobsen**(faculty advisor), Harvey Mudd College; Discrete Problem:**John A. Evans**,**Meral L. Reyhan**(students),**Peter R. Kramer**(faculty advisor),**Rensselaer Polytechnic Institute***SIAM Outstanding Paper Prizes*:**Adrian Lewis**, Cornell University;**Karen Braman**, South Dakota School of Mines and Technology,**Ralph Byers**, University of Kansas, and**Roy Mathias**, The College of William and Mary; and**Uriel Feige**, The Weizmann Institute (Israel) and**Robert Krauthgamer**, IBM Almaden Research Center*SIAM Prize for Distinguished Service to the Profession*:**Cleve Moler**, The MathWorks, Inc.*SIAM Student Paper Prizes*:**Boyce E. Griffith**, Courant Institute of Mathematical Sciences,**Rachel Levy**, North Carolina State University, and**Carolina Cardoso Manica**, University of Pittsburgh*The John von Neumann Lecture*:**Jerrold E. Marsden**, California Institute of Technology*James H. Wilkinson Prize in Numerical Analysis and Scientific Computing*:**Emmanuel J. Candes**, California Institute of Technology

*Cancer Modeling: Classical to Contemporary*, **Trachette L. Jackson**, University of Michigan

The 2006 SIAM annual meeting will be in Boston, July 10-14. A description of the 2004 SIAM annual meeting with links to descriptions of previous SIAM annual meetings is also available.