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Dr. Paul M. Torrens, Dept. Geographical Sciences and Institute for Advanced Computer Studies, Univ. Maryland
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News >> 

I am directing a new Center for Geospatial Information Science at the University of Maryland, and we are hiring tenure/tenure track faculty and lecturers (December 11, 2013)

New grant from NASA, to develop land cover indicators for the National Climate Assessment (September 12, 2013)

New grant from the National Science Foundation's Division of Advanced Cyberinfrastructure, to support our work on high-performance computing with data and network acceleration, in partnership with the Mid-Atlantic Crossroads (MAX) and their networking infrastructure (September 12, 2013)

Funding of our first NASA grant, to build geographic automata models of ice sheet dynamics. This builds on prototype work to develop physically-realistic environments for automata process models (August 30, 2013)

New paper accepted: Torrens, P.M. (2014). "High resolution space-time processes for agents at the built– human interface of urban earthquakes", International Journal of Geographical Information Science. This is the first paper published about my new work on building massively dynamic physical worlds for agent models. The paper will be part of the forthcoming IJGIS special issue on space-time GIS (August 13, 2013)

New paper published in the journal Entropy, with colleagues at Princeton University and the University of Southern California, on our NSF-funded accelerated computing project: Torrens, P.M., Kevrekidis, I.; Ghanem, R.; Zou, Y. (2013). "Simple urban simulation atop complicated models: multi-scale equation-free computing of sprawl using geographic automata", Entropy, 15(7): 2606-2634 (DOI 10.3390/e15072606) [open access] (July 1, 2013)

 

I was appointed as Associate Editor of the new Association of Computing Machinery (ACM) journal, ACM Transactions on Spatial Algorithms and Systems (TSAS) (June 6, 2013)

 
I was appointed as a Faculty Associate of the Maryland Population Research Center (February 9, 2013)


I have been appointed to the faculty of the University of Maryland Institute for Advanced Computer Studies (UMIACS) (February 6, 2013)

I received a new grant, from the National Institutes for Health and the RAND Corporation, in cooperation with Michael Rendall in the University of Maryland Population Research Center, to do geocoding and analysis for the Displaced New Orleans Resident Study (December 21, 2012)


A new paper, the first on my new polyspatial agents framework, is out in Regional Science Policy & Practice: Torrens, P.M. & Nara, A. (2012) “Polyspatial agents for multi-scale urban simulation and regional policy analysis”. Regional Science Policy and Practice, 4(4) 419-445 (DOI: 10.1111/j.1757-7802.2012.01084.x)(December 21, 2012)


A new paper, on high-performance computing for handling emergence in urban simulation is now out in the International Journal of Geographic Information Science: Zou, Y.; Torrens, P.M.; Ghanem, R.; Kevrekidis, I. (2012) “Accelerating agent-based computation of complex urban systems”. International Journal of Geographic Information Science (DOI: 10.1080/13658816.2012.669891). This work was supported by a NSF EAGER grant from the Division of Civil and Mechanical Systems (December 20, 2012) 


I gave an invited talk on agent-based modeling and computing for behavioral geography at the Krasnow Institute for Advanced Study, George Mason University, in Fairfax, VA today (October 22, 2012)


My Annals of the Association of American Geographers paper, co-authored with Aaron McDaniel, on modeling geographies of human behavior in riotous crowds is now out: Torrens, P.M. & McDaniel (2013), “Modeling geographic behavior in riotous crowds”. Annals of the Association of American Geographers, 103(1): 20-46 (DOI: 10.1080/00045608.2012.685047) (October 1, 2012)


I gave the keyonte address at this year's conference for the Computational Social Science Society of the Americas, in Santa Fe, NM (September 19, 2012)


I was a distinguished speaker at the U.S. Department of Health and Human Services in Washington, D.C., where I gave a talk on modeling geographies of behavior in critical scenarios (September 6, 2012)


New paper: Torrens, P.M. & Nara, A. (2012) “Polyspatial agents for multi-scale urban simulation and regional policy analysis”. Regional Science Policy and Practice (in press) (July 13, 2012)


New book chapter: Torrens, P.M. (2012) “Building mega-models for megacities”. In Complexity and Planning: Systems, Assemblages and Simulations, De Roo, Gert; Hiller, Jean; and Van Wezemael, Joris (Eds.). Farnham: Ashgate, pp. 409-427 (July 5, 2012)


The National Science Foundation featured my work on crowd modeling in a Research Highlights: "Crowd control based on individuals". This is the fourth time that the project has made into their highlights (also "Exploring crowd behavior in large cities"; "Subtle movements in crowds lead to large-scale phenomena"; and "Beginning scientists receive presidential awards") (June 7, 2012)


A couple of new papers on my movement modeling work and related computing architectures have been published recently (May 8, 2012):

  1. Torrens, P.M. & McDaniel, A. (2012) "Modeling geographic behavior in riotous crowds". Annals of the Association of American Geographers (in press; DOI: 10.1080/00045608.2012.685047) [project here]
  2. Torrens, P.M. & Griffin, W.A. (2012) “Exploring the micro-social geography of children’s interactions in preschool: a long-term observational study and analysis using Geographic Information Technologies”. Environment and Behavior (in press; DOI: 10.1177/0013916512438885) [project here]
  3. Zou, Y.; Torrens, P.M.; Ghanem, R.; Kevrekidis, I. (2012) “Accelerating agent-based computation of complex urban systems”. International Journal of Geographic Information Science  (in press; DOI: 10.1080/13658816.2012.669891) [project here]
  4. Torrens, P.M. (2012). "Moving agent-pedestrians through space and time". Annals of the Association of American Geographers, 102(1): 35-66 (DOI: 10.1080/00045608.2011.595658[project here]


The Reuters news agency filmed an interview with me about my riot and crowd modeling work. Some of the new work that I have been doing on 4D physics integraion with the agent-based modeling pipeline also featured in the segment. This has now been picked up by a variety of newspapers, news shows, and magazines, including CBS, ABC, the Baltimore Sun, the Chicago Tribune, and Scientific American. (January 2, 2012)

My research on riot modeling is featured in Bill Wasik's cover story for the January edition of Wired magazine in the United States: "#Riot: self-organized, hyper-networked revolts—coming to a city near you". Wired (see page 82). (December 18, 2011)


New Scientist has a feature on my riot and crowd modeling work; currently it is on the front page of their Website: "Virtual rioters predict how crowds move". More details on the work are available here, and I have a paper on the model and application, co-authored with Aaron McDaniel, forthcoming in the Annals of the Association of American Geographers in 2012. (November 16, 2011)

I will be giving a talk at George Mason University in Fairfax, VA on Monday, October 24 at 12. The address is Department of Computational Social Science, Kransnow Institute for Advanced Study, Research I, CSC Suite, Level 3, 4400 University Drive, Fairfax, VA 22030. The talk will be on the topic of: "Animating agent movement in computer models: fusing theory, technology, big data, and machine-learning". (October 21, 2011)


New paper accepted: Zou, Y.; Torrens, P.M.; Ghanem, R.; Kevrekidis, I. (2012) “Accelerating agent-based computation of complex urban systems”. International Journal of Geographic Information Science. This paper was the product of my collaboration with Roger Ghanem at the University of Southern California's Departments of Civil Engineering and Aerospace and Mechanical Engineering, and Ioannis Kevrekidis and Yu Zou at Princeton University's Department of Chemical and Biological Engineering. We have been developing a meta-simulation infrastructure for accelerating agent-based modeling, using Ioannis's equation-free approach, Roger's methods for measuring uncertainty, and my agent-based models. This project is sponsored by the National Science Foundation's EAGER program; more details of the research are available here (September 21, 2011)

New publications >> (a full list is here)




     Torrens, P.M. (2014) “Geographical agents in three dimensions”. In Geocomputation: A Practical Primer, Singleton, A. & Brunsdon, C. (Eds.) London: Sage (in press; book is here)

IJGIS

   

Torrens, P.M. (2014). "High resolution space-time processes for agents at the built–human interface of urban earthquakes", International Journal of Geographical Information Science (forthcoming; online first here)

entropy sprawl

   

Torrens, P.M., Kevrekidis, Y.; Ghanem, R.; Zou, Y. (2013). "Simple urban simulation atop complicated models: multi-scale equation-free computing of sprawl using geographic automata", Entropy, 15(7): 2606-2634 (DOI 10.3390/e15072606) [open access])

GIS social analysis



Torrens, P.M. & Griffin, W.A. (2013) “Exploring the micro-social geography of children’sinteractions in preschool: a long-term observational study and analysis using Geographic Information Technologies”. Environment and Behavior, 45(5): 584-614 (DOI: 10.1177/0013916512438885)

0



Torrens, P.M. & McDaniel, A. (2013) “Modeling geographic behavior in riotous crowds”. Annals of the Association of American Geographers, 103(1): 20-46 (DOI: 10.1080/00045608.2012.685047)

geosimulation regional science GIS geocomputation



Torrens, P.M. & Nara, A. (2012) “Polyspatial agents for multi-scale urban simulation and regional policy analysis”. Regional Science Policy and Practice, 4(4) 419-445 (DOI: 10.1111/j.1757-7802.2012.01084.x)

IJGIS



Zou, Y.; Torrens, P.M.; Ghanem, R.; Kevrekidis, I. (2012) “Accelerating agent-based computation of complex urban systems”. International Journal of Geographical Information Science, 26(10): 1917-1937 (DOI: 10.1080/13658816.2012.669891)  


mega models megacities




Torrens, P.M. (2012) “Building mega-models for megacities”. In Complexity and Planning: Systems, Assemblages and Simulations, De Roo, Gert; Hiller, Jean; and Van Wezemael, Joris (Eds.). Farnham: Ashgate, pp. 409-427


0





Torrens, P.M. (2012). "Moving agent-pedestrians through space and time". Annals of the Association of American Geographers, 102(1): 35-66 (DOI: 10.1080/00045608.2011.595658)





Torrens, P.M., Nara, A.; Li, X.; Zhu, H.; Griffin, W.A.; Brown, S. (2012) “An extensible simulation environment and movement metrics for testing walking behavior in agent-based models”. Computers, Environment and Urban Systems 36(1): 1-17 (DOI: 10.1016/j.compenvurbsys.2011.07.005)

GIS ABM




Torrens, P.M. (2012) “Urban geosimulation”. In Agent-Based Models of Geographical Systems: Moving from Theory to Real World Applications, Heppenstall, A.; Crooks, A.; See, L.; Batty, M. (Eds.). Berlin: Springer-Verlag, pp. 435-451 (DOI: 10.1007/978-90-481-8927-4_20)




Torrens, P.M., Li, X., Griffin, W.A. (2011). “Building agent-based walking models by machine-learning on diverse databases of space-time trajectory samples”. Transactions in Geographic Information Science, 15(s1): 67-94 [movie demo link]





Torrens, P.M. (2011) “Calibrating and validating cellular automata models of urbanization”. In Urban Remote Sensing: Monitoring, Synthesis and Modeling in the Urban Environment, Yang, Xiaojun (Ed.). Chichester: John Wiley & Sons, pp. 335-345





Torrens, P.M. (2010). “Agent-based modeling and the spatial sciences”. Geography Compass, 4(5): 428-448 (DOI: 10.1111/j.1749-8198.2009.00311.x)

gj



Torrens, P.M. (2010). "Geography and computational social science".GeoJournal, 75(2): 133-148 (DOI: 10.1007/s10708-010-9361-y)


 
Contact details >>
Geosimulation Research Laboratory

Department of Geographical Sciences

and University of Maryland Institute for Advanced Computer Studies

1129 LeFrak Hall, University of Maryland, College Park, MD 20742, USA [directions and parking]

+1 301-405-4050 [main office]; +1 301-405-6584 [desk]; +1 301-314-9299 [fax]

torrens at geosimulation dot com

 

 


GIS movement tracks

Big data movement analytics

 

climate indicators spatial analysis

Land indicators of climate

geosimulation high performance computing

High-performance computing and networking for geosimulation

earthquake model agent based GIS

Earthquake models

CA ice sheet model

Ice-sheet modeling





kinect control of GIS and robots
Robot motion control



simulating disasters ABM GIS
Human behavior in critical scenarios



crowd model riot model simulation wired

Modeling riots



physics engine GIS

Dynamic physics for built infrastructure




moving agents through space and time

Moving agents through space and time




validating agent based models

Validating agent-based models




machine learning GIS

Machine-learning behavioral geography




high performance computing urban simulation emergence

Accelerating agent-based models




megacity models

Megacity futures




immersive modeling

Immersive modeling




space-time GIS

Space-time GIS and analysis




measuring sprawl

A toolkit for measuring sprawl




space-time GIS

Modeling time, space, and behavior




simulating crowd behavior

Simulating crowd behavior



wi-fi geography

Wi-Fi geography


Simulating sprawl

Simulating sprawl