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Computational Science and Modeling

Computational Science and Modeling. What is computational science and modeling (CSM)?. Using computers to help gain scientific understanding Using computers to run calculations of complex situations and create representative models Used in many, if not all, science fields

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Computational Science and Modeling

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  1. Computational Science and Modeling

  2. What is computational science and modeling (CSM)? • Using computers to help gain scientific understanding • Using computers to run calculations of complex situations and create representative models • Used in many, if not all, science fields • Biology, chemistry, meteorology, geology, physics, engineering, computer science, math, nursing, psychology • Also military and commercial uses

  3. Meteorology • Before computers… • meteorologists solved mathematical equations by hand to predict weather conditions • This was slow and tedious • This changed with the development of electronic computers in the 1940’s • One of the first computers was the Electronic Numerical Integrator and Computer (ENIAC) • ENIAC used in 1950 to solve meteorological equations relatively quickly (24 hr. calculations) • Computers now solve complex equations for forecast models P. Lynch, The origins of computer weather prediction and climate modeling, J. Comput. Phys. (2007), doi:10.1016/j.jcp.2007.02.034 Picture from http://weather.unisys.com/

  4. Traffic Flow Modeling • Study of traffic flow using computers began in 1990’s • Used for city planning and to prepare for emergency events • Integrates statistics, physics, and psychology • Density of traffic, braking mechanism, drivers’ anticipated reactions Minkel, J. R. (2004). The Computer Minds the Commuter. Physical Review: Focus, 13. Retrieved from http://focus.aps.org/story/v13/st26#author Lee, H. K., Barlovic, R., Schreckenberg, M., Kim, D,. (2004) Mechanical Restriction Versus Human Overreaction Triggering Congested Traffic States, Phys. Rev. Lett. 92, 238702 Picture from http://oumits.olemiss.edu/research_traffic_count.htm

  5. Genome Sequencing • 1978—computers recognized as key tool for sequencing DNA • 1990—Human Genome Project (HGP) began • 1998—Increased computer power allowed a new method to solve genome sequence much faster • Computational study of genome sequences has led to a whole new field called bioinformatics Pillsbury, E., A History of Genome Sequencing http://bioinfo.mbb.yale.edu/course/projects/final-4/ Danchin, A., A Rattling Good History: The Story of the Human Genome Projecthttp://www.normalesup.org/~adanchin/populus/hgp.html Pictures from http://www.wired.com/medtech/health/news/2003/02/57674?currentPage=all http://www.kscience.co.uk/as/module2/dna_structure/DNA_files/History%20of%20DNA%20research_files/cell-to-DNA.jpg

  6. Fluid Dynamics • Of gases, liquids, heat, sound, blood, stars, galaxies --anything that flows • Used in design of extraordinary array of devices • Aerodynamics: airplanes, cars, sprinters, cyclists • Hydrodynamics: boats, racing suits • Earthquakes: buildings, bridges • Combustion: engines, power plants • Many others • Integrates physics, chemistry, and engineering Aeronautical Research and Test Institute (2009) http://www.vzlu.cz/en/activities/aerodynamics-computing/computer-fluid-dynamics What is Computational Fluid Dynamics (CFD), ANSYS Inc. http://www.fluent.com

  7. Global Climate • NASA Center for Climate Simulation (NCCS) at the Goddard Space Flight Center (and others) • Computers take into account pollution, humidity, temperature gradients, energy, sources and sinks • Model changes in arctic sea ice thickness, tide height, and the ozone layer Schmunk, R. B., Global Climate Modeling , (2009) Goddard Space Flight Institutehttp://www.giss.nasa.gov/research/modeling/gcms.html Pictures from: NASA/Goddard Space Flight Center, Scientific Visualization Studio http://svs.gsfc.nasa.gov/vis/a000000/a001000/a001075/index.htmlhttp://svs.gsfc.nasa.gov/vis/a010000/a010500/a010563/index.htmlhttp://svs.gsfc.nasa.gov/vis/a010000/a010500/a010568/index.html

  8. Epidemiology • Computers used to understand the causes of and spreading of diseases and to develop methods of intervention • More people and factors can be studied with computers than by hand models • Integrating factors such as population structure, biology, age of individuals, climate, diet, and other real world situations • Diseases such as cancers, AIDS, Alzheimer’s, avian influenza, measles, Foot-and-Mouth disease, and pneumonia Duke-Sylvester, S. M., Perencevich, E. N., Furuno, J. P., Real, L. A., Gaff, H. (2008) Advancing Epidemiological science through computational modeling: a review with novel examples. Ann. Bot. Fennici45, 385-401 http://www.sekj.org/PDF/anz45-free/anz45-385.pdf Division of International Epidemiology and Population Studies (DIEPS), U.S. NIH John E. Fogarty International Center for Advanced Study in the Health Sciences http://www.fic.nih.gov/epipopstudies.htm

  9. Computer Generated Images (CGI) • First used in a film called Westworld (1973) • Toy Story (1995) was the first animated film using all CGI • Animusic– Animations set to music • Idea began in 1982 by Wayne Lytle • Artists create the characters/ objects and control lighting while the computer automatically adds shadows and multiple views Yaeger, L. S. (2002). A Brief, Early History of Computer Graphics in Film http://www.beanblossom.in.us/larryy/cgi.html History, Animusic: Computer Animated Music http://www.animusic.com/company/history.php What is a Computer Generated Image? (2003). The Sketch Farm http://www.sketchfarm.com/cgi_page.html Pictures from http://www.animusic.com/news/index.php http://disneybooks.disney.go.com/books/1423129679.html

  10. Medicine • Model musculoskeletal movement • Predict causes of birth defects • Model tumor growth • Help surgeons practice and plan before the surgery • Predict outcomes of treatments for spinal deformities PSRG Projects: Patient-specific biomechanical modelling for improved treatment of spinal deformity, (2009) Queensland University of Technologyhttp://www.bee.qut.edu.au/research/themes/medicalengineering/paediatrics/projects.jsp Guyuron, B, Ross, R. J., (1989) Computer-generated model surgery: An exacting approach to complex craniomaxillofacial disharmonies. Journal of Cranio-Maxillofacial Surgery 17, 101-104 Hollmer, M. Computer Model Predicts Brain Tumor Growth And Evolution (2009) Medical News Todayhttp://www.medicalnewstoday.com/articles/150666.php Fisher, J. C., and Bodenstein, L. (2006) Computer simulation analysis of normal and abnormal development of the mammalian diaphragm. Theoretical Biology and Medical Modelling 3, 1-17 http://www.tbiomed.com/content/3/1/9 Musculoskeletal Modeling Dynamic Simulations: Jumping (1996) Goddard Space Flight Center: Scientific Visualization Studio http://svs.gsfc.nasa.gov/vis/a000000/a000000/a000094/index.html

  11. In the Military • Predicting cost, time constraints, potential difficulties, and the best mode of transportation in the deployment of troops • Simulating events and circumstances for training • Modeling human behavior to improve military simulations for training • Forecasting the cost of maintaining weapons systems and aircraft Uǧur Z. Yildirim , I. Sabuncuoǧlu , BarbarosTansel, A simulation model for military deployment, Proceedings of the 39th conference on Winter simulation: 40 years! The best is yet to come, December 09-12, 2007, Washington D.C. Smith, Roger. "Military Modeling". CRC Handbook of Dynamic System Modeling. Boca Raton: Taylor & Francis Group, LLC, 2007. Pew, Richard, and Anne Mavor. Modeling Human and Organizational Behavior: Application to Military Simulations. Washington: National Academy Press, 1998. "Become Confident in Your Forecast of Weapon System Support Requirements". LMCI Consulting. 7-20-10 <http://logmodctr.com/forecasting/>. "Virtual Warriors Push Envelope at 9th Annual MOVES Research Summit". Navel Postgraduate School. 7-20-10 <http://www.nps.edu/About/News/Virtual-Warriors-Push-Envelope-at-9th-Annual-MOVES-Research-Summit-.html>.

  12. Another cool site about CSM • The Society for Modeling & Simulation International http://www.scs.org/

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