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New England Complex Systems Institute
238 Main Street Suite 319, Cambridge, MA 02142
Phone: 617-547-4100 Fax: 617-661-7711

To gain a useful understanding of a system's complexity, NECSI researchers have developed the complexity profile, Complex System Multiscale Analysis, and modeling to characterize the emergent behavior of a system at multiple scales. By identifying a system's scales of behavior we can identify its functional capabilities. These capabilities can then be compared to the tasks for which the system is designed, allowing us to determine whether it can achieve its intended goals and, if not, why. Multiscale Analysis proves especially useful in the study of large organizations, such as health care, the military, and corporations.

Publications, Books & Edited Volumes

Y. Bar-Yam, D. Harmon, Y. Bar-Yam, Computationally tractable pairwise complexity profile, Complexity 18, 5 (May, 2013). Full Paper on arXiv. PDF file

R. Metzler, Y. Bar-Yam, Multiscale analysis of correlated Gaussians, Phys. Rev. E 71, 046114 (2005). PDF file

Y. Bar-Yam, About Engineering Complex Systems: Multiscale Analysis and Evolutionary Engineering, in Engineering Self-Organising Systems: Methodologies and Applications, S. Brueckner, G. Di Marzo Serugendo, A. Karageorgos, R. Nagpal, Eds. (ESOA 2004, LNCS 3464, Springer-Verlag, 2005) pp. 16-31.PDF file

S. Gheorghiu-Svirschevski, Y. Bar-Yam, Multiscale analysis of information correlations in an infinite-range, ferromagnetic Ising system, Phys Rev E 70, 066115 (2004). PDF file

Y. Bar-Yam, A Mathematical Theory of Strong Emergence using Multiscale Variety, Complexity 9, 6, 15-24 (2004). PDF file

Y. Bar-Yam, Multiscale Variety in Complex Systems, Complexity 9:4, pp. 37-45, 2004. PDF file (8.6MB) or zipped PDF file (1.4MB)

Y. Bar-Yam, Multiscale complexity/entropy, Advances in Complex Systems 7, 47-63 (2004). PDF file

R. Metzler, Y. Bar-Yam, M. Kardar, Information flow through a chaotic channel: prediction and postdiction at finite resolution, Phys Rev E 70, 026205 (2004). nlin.CD/0310048

Y. Bar-Yam, Sum rule for multiscale representations of Kinematic systems, Advances in Complex Systems 5, 409-431 (2002). PDF file

Y. Bar-Yam, Large-Scale Engineering and Evolutionary Change, Useful Concepts for Implementation of FORCEnet, Report to Chief of Naval Operations Strategic Studies Group, 2002. PDF file

Y. Bar-Yam, Multiscale Representation Phase I, Report to Chief of Naval Operations Strategic Studies Group, 2001. PDF file

Y. Bar-Yam, Complexity Rising: From Human Beings to Human Civilization, a Complexity Profile, in Encyclopedia of Life Support Systems (EOLSS), developed under the Auspices of the UNESCO, EOLSS Publishers, Oxford, UK,, 2002; also NECSI Technical Report 1997-12-01 (December 1997). PDF file

M. Ben-Ezra, M. Werman, Y. Bar-Yam, A self-stabilizing, robust region finder applied to color and optical flow pictures, Image and Vision Computing 19, 7, 427-433 (May, 2001).

R. M. D'Souza, Y. Bar-Yam, M. Kardar, Sensitivity of ballistic deposition to pseudorandom number generators, Phys Rev E 57, 5, 5044-5052 (1998).

Y. Bar-Yam, A. Davidson Environmental Complexity: Information For Human-Environment Well-being InterJournal. (1997).