Publications

2006
Justin Werfel and Radhika Nagpal. 2006. “Three-dimensional Directed Construction by Mobile Robots.” In Workshop on Self-Reconfigurable Modular Robots, Robotics: Science and Systems (RSS). Publisher's Version
Matthew Gibson, Ankit Patel, Radhika Nagpal, and Norbert Perrimon. 2006. “The Emergence of Geometric Order in Proliferating Metazoan Epithelia.” Nature, 442, 7106.Abstract

The predominantly hexagonal cell pattern of simple epithelia was noted in the earliest microscopic analyses of animal tissues1, a topology commonly thought to reflect cell sorting into optimally packed honeycomb arrays2. Here we use a discrete Markov model validated by time-lapse microscopy and clonal analysis to demonstrate that the distribution of polygonal cell types in epithelia is not a result of cell packing, but rather a direct mathematical consequence of cell proliferation. On the basis of in vivo analysis of mitotic cell junction dynamics in Drosophila imaginal discs, we mathematically predict the convergence of epithelial topology to a fixed equilibrium distribution of cellular polygons. This distribution is empirically confirmed in tissue samples from vertebrate, arthropod and cnidarian organisms, suggesting that a similar proliferation-dependent cell pattern underlies pattern formation and morphogenesis throughout the metazoa.

PDF - Supplement - Perspective
2005
Justin Werfel, Yaneer Bar-Yam, and Radhika Nagpal. 2005. “Building Patterned Structures with Robot Swarms.” In Intl. Joint Conference on Artificial Intelligence (IJCAI '05). Publisher's Version
Geoff Werner-Allen, Geetika Tewari, Ankit Patel, Matt Welsh, and Radhika Nagpal. 2005. “Firefly-Inspired Sensor Network Synchronicity with Realistic Radio Effects.” In ACM Conference on Embedded Networked Sensor Systems (SenSys '05). Publisher's Version
Jimming Cheng, Winston Cheng, and Radhika Nagpal. 2005. “Robust and Self-repairing Formation Control for Swarms of Mobile Agents.” In National Conference on Artificial Intelligence (AAAI '05). Publisher's Version
Daniel Yamins. 2005. “Towards a Theory of "Local to Global" in Distributed Multi-Agent Systems (II).” In Autonomous Agents and Multi Agent Systems Conferences (AAMAS). Publisher's Version
Daniel Yamins. 2005. “Towards a Theory of "Local to Global" in Distributed Multi-Agent Systems (I).” In Autonomous Agents and Multi Agent Systems Conferences (AAMAS). Publisher's Version
2004
Kasper Stoy and Radhika Nagpal and. 2004. “Self-reconfiguration using Directed Growth (for a modular robot).” International Symposium on Distributed Autonomous Robotic Systems (DARs). Publisher's Version
Kasper Stoy and Radhika Nagpal. 2004. “Self-repair and Scale-independent Self-reconfiguration (for a modular robot).” In IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). Publisher's Version
2003
Radhika Nagpal and Marco Mamei. 2003. “Engineering Amorphous Computing Systems.” Methodologies and Software Engineering for Agent Systems. Publisher's Version
Jonathan Bachrach, Radhika Nagpal, Micheal Salib, and Howard Shrobe. 2003. “Experimental Results and Theoretical Analysis of a Self-Organizing Global Coordinate System for Ad Hoc Sensor Networks.” Telecommunications Systems Journal. Publisher's Version
Radhika Nagpal, Howard Shrobe, and Jonathan Bachrach. 2003. “Organizing a Global Coordinate System from Local Information on an Ad Hoc Sensor Network.” In Processing in Sensor Networks (IPSN '03). Publisher's Version
Radhika Nagpal, Attila Kondacs, and Catherine Chang. 2003. “Programming Methodology for Biologically-Inspired Self-Assembling Systems.” In AAAI Spring Symposium on Computational Synthesis: From Basic Building Blocks to High Level Functionality. Publisher's Version
Lauren Clement and Radhika Nagpal. 2003. “Self-Assembly and Self-Repairing Topologies.” In Workshop on Adaptability in Multi-Agent Systems, RoboCup Australian Open. Publisher's Version
Radhika Nagpal. 2003. “Towards a Catalog of Biologically-inspired Primitives.” In Workshop on Engineering Self-organising Applications, Autonomous Agents and Multiagents Systems Conference (AAMAS). Publisher's Version
2002
Radhika Nagpal. 2002. “Programmable Pattern-Formation and Scale-Independence.” In Proceedings of the 4th International Conference on Complex Systems (ICCS). Publisher's Version
Radhika Nagpal. 2002. “Programmable Self-Assembly Using Biologically-Inspired Multiagent Control.” In Proceedings of the 1st International Joint Conference on Autonomous Agents and Multi-Agent Systems (AAMAS). (pdf)
2000
Harold Abelson, Don Allen, Daniel Coore, Chris Hanson, George Homsy, Thomas Knight, Radhika Nagpal, Erik Rauch, Gerald Sussman, and Ron Weiss. 2000. “Amorphous Computing.” Communications of the ACM, 43, 5. (pdf)
1998
Ron Weiss, George Homsy, and Radhika and Nagpal. 1998. “Programming Biological Cells.” In International Conference on Architectural Support for Programming Languages and Operating Systems, Wild & Crazy Ideas Session. Publisher's Version

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