Complexity Digest 2002.24 June-17-2002

 Archive:  http://www.comdig.org, European Mirror:  http://www.comdig.de

Asian Mirror:  http://www.phil.pku.edu.cn/resguide/comdig/ (Chinese GB-Code)

"I think the next century will be the century of complexity." Stephen Hawking

  1. International Conference on Complex Systems (ICCS2002), Video/Audio Report
  2. Computational And Evolutionary Aspects Of Language, Nature
  3. Neural Systems Involved In 'Theory Of Mind', Nature Rev. Neuroscience
  4. Circadian Rhythms, Nature Reviews Neuroscience
  5. Developmental Neurobiology: Cortical Liars, Nature
    1. Putting the Brakes on Regeneration, Science
  6. Sensory Systems: Mapping Out The Fly Brain, Nature Reviews Neuroscience
  7. Complex-Trait Genetics: Emergence Of Multivariate Strategies, Nature Reviews Neuroscience
  8. Neurons in Action, Science
    1. Direct Cortical Control of 3D Neuroprosthetic Devices, Science
  9. Cholera Strengthened by Trip Through Gut, Science
    1. Host-Induced Epidemic Spread Of The Cholera Bacterium, Nature
  10. Atmospheric Chemistry: Iodine's Air Of Importance, Nature
    1. Marine Aerosol Formation From Biogenic Iodine Emissions, Nature
  11. Pilotless Research Aircraft: Flying Free, Nature
  12. Biodiversity As A Barrier To Ecological Invasion, Nature
    1. Ecology: Darwin's Naturalization Hypothesis Challenged, Nature
  13. T Cell Activation in Six Dimensions, Science
  14. Statistical Mechanics: Far From Equilibrium, Science
    1. Equilibrium Information from Nonequilibrium Measurements, Science
  15. Complex Dynamics: Topology, Dynamics, and Synchronization, Intl. J. Bif. & Chaos
  16. Emergence Of Cooperation And Selection Of Interactions, arXiv
  17. Single-Atom Transistor, Enabling 'Virtual Dance Of Electrons', Cornell Press Release
  18. Noise-Resistant Chaotic Maps, Chaos
  19. Complex Challenges: Global Terrorist Networks
    1. Can Large-Scale Terrorist Attacks be Prevented?, OrgNet.com
    2. U.S. Argues War Detainee Shouldn't See a Lawyer, NYTimes
  20. Links & Snippets
    1. Other Publications
    2. Webcast Announcements
    3. Conference Announcements
    4. Position Announcement

1. International Conference on Complex Systems (ICCS2002),Video/Audio Reports

Editor's Note: We did not get permission to record the presentations of ICCS2002. All plenary presentations were recorded by the organizer, who announced that those will be made available with the proceedings. No release date or format were given (see conference summary). (Note, the videos of ICCS2000 presentations are still not yet available.).

We are pleased to present short summaries and comments given by some of the participants outside of the conference program. For more information about the Information Access project of ComDig, please link to http://www.comdig.org/selfref/ and please participate in our survey.

Note, that we offer the media files in two formats: streaming video and mp3 audio that is downloadable to portable mp3 players (the ones that kids use to listen to their music).

 

2. Computational And Evolutionary Aspects Of Language, Nature

Excerpts: Language is our legacy. It is the main evolutionary contribution of humans, and perhaps the most interesting trait that has emerged in the past 500 million years. Understanding how Darwinian evolution gives rise to human language requires the integration of formal language theory, learning theory and evolutionary dynamics. (…) Learning theory formalizes the task of language acquisition-it can be shown that no procedure can learn an unrestricted set of languages. (…) Evolutionary dynamics can be formulated to describe the cultural evolution of language and the biological evolution of universal grammar.

 

3. Neural Systems Involved In 'Theory Of Mind', Nature Rev. Neuroscience

Excerpts: Brain regions that are involved in language processing have been proposed to constitute part of the neural substrate of ToM. However, evidence from people with language disorders has indicated that these regions are not part of a core ToM neural system, but are actually co-opted into ToM. (...)

Evidence from people with autism and from studies of non-human primates seems to indicate that amygdala circuits are central to ToM and (...) this region forms part of a core ToM system. However, the emergence of ToM does not depend solely on the amygdala, but requires the involvement of the co-opted systems.

 

4. Circadian Rhythms, Nature Reviews Neuroscience

Excerpts: Our early thinking on circadian rhythmicity was guided by the idea that a central clock the suprachiasmatic nucleus (SCN) of the hypothalamus governed our sleep wake cycles.

Using microarrays, (...) compared circadian gene expression between the SCN and the liver. They identified several hundred cycling transcripts, the products of which regulate key functions of both organs. (...) found that most of the identified genes showed circadian expression in liver or heart, but not in both.
(...) many key processes are under circadian control throughout the organism, and give us a glimpse of how the different wheels of the clock might work together.

 

5. Developmental Neurobiology: Cortical Liars, Nature

Excerpts: Widespread and indeterminate tangential dispersion of cells would, on the face of it, scramble any embryonic blueprint.

A bigger surprise emerged when second-generation cell-lineage studies revealed that tangential migration is associated with the development of interneurons, whereas projection neurons seemed to be the product of radial migration4, 5. At that time it was assumed that both kinds of neuron are born in (…) the main site of cell birth in the neocortex from which new cells cross an adjacent layer, (…) into the emerging cortical layers.

 

Excerpts:  Recently, exciting progress has been made in elucidating new ways to stimulate regeneration of adult RGC axons in the optic nerve. (…) Yet, the total regeneration distances are short compared with the distances obtained using the same strategies in spinal cord (5, 6)--it is almost as though optic nerve axons just give up growing. Implantation of living peripheral nerve segments into the eye, which offers sustained treatment, does not promote growth much further in the optic nerve, only a few millimeters (7).

 

6. Sensory Systems: Mapping Out The Fly Brain, Nature Reviews Neuroscience

Excerpts: The olfactory sensory neurons in Drosophila each express only one odorant receptor gene(...). This spatial segregation, if it were maintained further up in the brain, might allow the olfactory system to use a map to represent different odours by their patterns of activation.

There is also some evidence that the mouse olfactory bulb might project to the olfactory cortex in a similar spatially specific but convergent manner, pointing to common strategies for encoding olfactory information. (...) the spatial specificity of the Drosophila system does support the idea that spatial patterning is important in the processing of olfactory inputs.

 

7. Complex-Trait Genetics: Emergence Of Multivariate Strategies, Nature Reviews Neuroscience

Excerpts: Complex traits, including many disease-related traits, are influenced by multiple genes. Bivariate approaches that associate one gene with one trait are yielding to multivariate methods to synthesize the effects of multiple genes, integrate results across independent studies, and aid in the identification of coordinated pathways and interactions between loci.

 

8. Neurons in Action, Science

Excerpt: Whereas the complex neural processes that underlie consciousness are beginning to be elucidated, the simpler neural circuitry that drives perception and the generation of movement surprisingly remains unclear. For instance, we still do not know whether movement depends on a few localized neuronal circuits or the dynamic state of multiple distributed neuronal systems. Much of the hope surrounding neuroprosthetic devices that translate the activity of neurons in the brain into muscle movements depends on understanding how neurons normally initiate and control skeletal muscles.
  • Neurons in Action, Konig, Peter, Verschure, Paul F. M. J., Science 2002 296: 1817-1818

 

Excerpts: Three-dimensional (3D) movement of neuroprosthetic devices can be controlled by the activity of cortical neurons when appropriate algorithms are used to decode intended movement in real time. Previous studies assumed that neurons maintain fixed tuning properties, and the studies used subjects who were unaware of the movements predicted by their recorded units. (…) By using control algorithms that track these changes, subjects made long sequences of 3D movements using far fewer cortical units than expected. Daily practice improved movement accuracy and the directional tuning of these units.

 

9. Cholera Strengthened by Trip Through Gut, Science

Excerpt: Poor sanitation promotes the spread of cholera, but that's not the only way humans foster the deadly diarrheal disease. Microbiologists have discovered that the human gut seems to prime the bacteria responsible. Before Vibrio cholerae exit the body in watery stools, something about the intestinal environment causes them to rev up the activity of certain genes. These genes, in turn, seem to prepare them for ever more effective colonization of their next victims, possibly fueling epidemics, says Andrew Camilli, a microbiologist at Tufts University School of Medicine in Boston.

 

Excerpts: The factors that enhance the transmission of pathogens during epidemic spread are ill defined. Water-borne spread of the diarrhoeal disease cholera occurs rapidly in nature, whereas infection of human volunteers with bacteria grown in vitro is difficult in the absence of stomach acid buffering1. (…) Here we report that characterization of Vibrio cholerae from human stools supports a model whereby human colonization creates a hyperinfectious bacterial state that is maintained after dissemination and that may contribute to epidemic spread of cholera.
  • Host-Induced Epidemic Spread Of The Cholera Bacterium, D. Scott Merrell, Susan M. Butler, Firdausi Qadri, Nadia A. Dolganov, Ahsfaqul Alam, Mitchell B. Cohen, Stephen B. Calderwood, Gary K. Schoolnik & Andrew Camilli, Nature 417, 642 - 645 (2002); doi:10.1038/nature00778

 

10. Atmospheric Chemistry: Iodine's Air Of Importance, Nature

Excerpts:  Iodine-containing emissions from marine algae can be converted by sunlight into aerosol particles. If this phenomenon occurs on a large scale, it could have significant effects on climate.

The discovery of a previously unrecognized source of aerosol particles is big news to atmospheric scientists. Just such a source is described by O'Dowd et al. Building on earlier work, they have unravelled a photochemical phenomenon that occurs in sea air and produces aerosol particles composed largely of iodine oxides. The precursor molecules are organic iodide vapours emitted by marine algae.

 

Excerpts:  The formation of marine aerosols and cloud condensation nuclei-from which marine clouds originate-depends ultimately on the availability of new, nanometre-scale particles in the marine boundary layer. Because marine aerosols and clouds scatter incoming radiation and contribute a cooling effect to the Earth's radiation budget, new particle production is important in climate regulation. (…).concentrations of condensable iodine-containing vapours over the open ocean are sufficient to influence marine particle formation. We suggest therefore that marine iodocarbon emissions have a potentially significant effect on global radiative forcing.
  • Marine Aerosol Formation From Biogenic Iodine Emissions, Colin D. O'dowd, Jose L. Jimenez, Roya Bahreini, Richard C. Flagan, John H. Seinfeld, Kaarle Hämeri, Liisa Pirjola, Markku Kulmala, S. Gerard Jennings & Thorsten Hoffmann, Nature 417, 632 - 636 (2002); doi:10.1038/nature00775

 

11. Pilotless Research Aircraft: Flying Free, Nature

Editor's Note: Swarms of UAVs might be able to provide the spatio-temporal input patterns that will be required for control of spatio-temporal chaos in the atmosphere for instance in the formation and propagation of hurricanes. (See our discussion with Ed Lorenz)

Excerpts: Pilotless aircraft could help monitor forest fires, or collect data over vast areas of ocean. But aviation authorities are reluctant to let them share the sky with other aircraft. (…)

UAVs [Unmanned Aerial Vehicles, Ed.] have clear advantages over manned aircraft. For safety, take-off and landing are usually remote controlled. But once up, UAVs can stay aloft for days or weeks on end, following a predetermined path and guided by Global Positioning System satellites.

Some can fly higher than piloted craft. (…)More robust UAVs can cruise at heights considered too low for manned craft.

 

12. Biodiversity As A Barrier To Ecological Invasion, Nature

Excerpts: Biological invasions are a pervasive and costly environmental problem1, 2 that has been the focus of intense management and research activities over the past half century.

(…)we show here that species diversity in small experimental grassland plots enhances invasion resistance by increasing crowding and species richness in localized plant neighbourhoods. Both the establishment (number of invaders) and success (proportion of invaders that are large) of invading plants are reduced. These results suggest that local biodiversity represents an important line of defence against the spread of invaders.

 

Excerpts: Darwin proposed that introduced plant species will be less likely to establish a self-sustaining wild population in places with congeneric native species because the introduced plants have to compete with their close native relatives, or are more likely to be attacked by native herbivores or pathogens, a theory known as Darwin's naturalization hypothesis. Here we analyse a complete list of seed-plant species that have been introduced to New Zealand and find that those with congeneric relatives are significantly more, not less, likely to naturalize (…).

 

13. T Cell Activation in Six Dimensions, Science

Excerpt: It will be important to dissect the signals that govern these striking changes in cellular behavior and to determine how these events shape cellular immune responses both inside and outside the thymus. Undoubtedly, six-dimensional imaging strategies that measure the light intensity, color, and motion in space and time of single immune cells in living tissues (and ideally in live animals) will be a critical tool for probing ever more deeply into the mysteries of immunity.

 

14. Statistical Mechanics: Far From Equilibrium, Science

Excerpts: (…) Liphardt et al. (2) provide the first experimental test of a remarkable connection between an equilibrium property, the free energy, and a series of measurements performed far from equilibrium.

The free energy is of central importance in statistical mechanics and thermodynamics (1). (…).

For large, complex molecules such as proteins, an understanding of the free-energy landscape (which describes the free energy of all possible configurations of the system) is crucial for determining folding pathways, the topology of the folded state, and the biological utility of the protein.

 

Excerpt: Recent advances in statistical mechanical theory can be used to solve a fundamental problem in experimental thermodynamics. In 1997, Jarzynski proved an equality relating the irreversible work to the equilibrium free energy difference, G. This remarkable theoretical result states that it is possible to obtain equilibrium thermodynamic parameters from processes carried out arbitrarily far from equilibrium. We test Jarzynski's equality by mechanically stretching a single molecule of RNA reversibly and irreversibly between two conformations.

 

15. Complex Dynamics: Topology, Dynamics, and Synchronization, Intl. J. Bif. & Chaos

Abstract: Dramatic advances in the field of complex networks have been witnessed in the past few years. This paper reviews some important results in this direction of rapidly evolving research, with emphasis on the relationship between the dynamics and the topology of complex networks.

Basic quantities and typical examples of various complex networks are described; and main network models are introduced, including regular, random, small-world and scale-free models. The robustness of connectivity and the epidemic dynamics in complex networks are also evaluated. To that end, synchronization in various dynamical networks are discussed according to their regular, small-world and scale-free connections.

 

16. Emergence Of Cooperation And Selection Of Interactions, arXiv

Abstract (excerpted): The question of the emergence of cooperation in animal or human societies has focused the attention of the scientific community since the seminal work of Axelrod. We propose here a model which take into account the importance of local interactions in social networks and the possibility of selection of interactions at the individual level. Starting with the three main strategies observed in experimental economy :altruist, reciprocator and egoist, we show through analytical studies and simulations that this is a minimum set to see the emergence of cooperation in presence of egoists strategies. We then propose a scenario for the emergence of cooperation in two steps : a slow neutral evolution and then a fast one. With minimum hypothesis on the rationality of the agents, we explain the main phenomenon observed in real communities. Our framework is the evolutionary game theory with heterogeneous populations, repeated, directed and sequential interactions and overlapping generations. (...)

 

17. Single-Atom Transistor, Enabling 'Virtual Dance Of Electrons', Cornell Press Release

Contributing Editor's Note: The theoretical modeling of such devices invokes many ideas from quantum chaos. See, for example, Comdig 2001.35.8. In particular, Jahn-Teller theory plays an important role.

Most of these theoretical models have been used to study systems simpler than the actual experimental devices discussed in the article, so there is considerable room for theoretical work in the modeling of nanomechanical devices.

Excerpts: (...) A long-sought goal of scientists has been to shrink the transistor, the basic building block of electronic circuits, to smaller and smaller size scales. Scientists at Cornell University have now reached the smallest possible limit: a transistor in which electrons flow through a single atom.

The Cornell researchers have created a single-atom transistor by implanting a "designer" molecule between two gold electrodes, or wires, to create a circuit. When voltage was applied to the transistor, electrons flowed through a single cobalt atom within the molecule. (...)

McEuen cautions that the device cannot yet be described as having all the functions of a traditional transistor, such as amplification. But he sees a potential application for the new transistor as a chemical sensor because a change in the environment around the molecule could cause a measurable alteration of the conductance of the device. (...)

 

18. Noise-Resistant Chaotic Maps, Chaos

Abstract: Synchronized chaotic systems are highly vulnerable to noise added to the synchronizing signal. It was previously shown that chaotic circuits could be built that were less sensitive to this type of noise. In this work, simple chaotic maps are demonstrated that are also less sensitive to added noise. These maps are based on coupling a shift map to a digital filter. These maps are simple enough that they should help lead to an understanding of how noise-robust chaotic systems work.

 

19. Complex Challenges: Global Terrorist Networks

Author's Note: Instead of a top-down analysis of massive amounts of data, why not try a bottom-up process by following a suspect's links? We knew of two al-Qaeda suspects living in the US, 18 months before 9-11-01. Could network analysis of these two suspects have helped prevent or diminish the terrorist attack? 6/14/01

Excerpt: In my previous paper on mapping terrorist networks, I explained how network data is used often in prosecution of crimes, but not in the prevention of crimes. I suggested it may be possible to develop a preventative network map starting with 'suspects' and then iteratively mapping their direct and indirect contacts.

U.S. intelligence knew about two of the 9-11 hijackers, and their ties to al-Qaeda, over 18 months before the tragic events of September 11, 2001. Is it possible that tracking these two individuals and their network of contacts could have prevented the attacks on America?

Early in 2000, the CIA found two suspects linked to al-Qaeda, and they were heading back to America. Nawaf Alhazmi and Khalid Almihdhar were photographed attending a meeting of known terrorists in Malaysia. After the meeting they returned to Los Angeles, where they had already set up residence in late 1999. Two suspects, to begin our network map, were now available.

Excerpts: The government argued today that Yasser Esam Hamdi, a prisoner from the Afghan war (…), should not be allowed to see a lawyer for national security reasons.(…)

He has not been charged with any crime and has not been allowed to see a lawyer on the grounds that he is an enemy combatant. (…)

On behalf of Defense Secretary Donald H. Rumsfeld, Mr. McNulty said any meeting between an enemy combatant and a lawyer could let vital information be transmitted, albeit unwittingly, to terrorists.

 

20. Links & Snippets

20.1 Other Publications
  1. Chaos in Circuits and Systems, G. Chen and T. Ueta (Eds), World Scientific Series on Nonlinear Science, Series B - Vol. 11, Pub. date: Scheduled Summer 2002, Book Report
  2. Symmetry Breaking, Bifurcations, Quasiperiodicity, And Chaos Due To Electric Fields In A Coupled Cell Model, P. Hasal & J. H. Merkin, Chaos, Vol.12, Issue 1, pp. 72-86, March 2002
  3. Development, H. Wood, Nature Reviews Neuroscience, Vol. 3, No 6, 419, June 2002, ... motor neurons in the spinal cord sort themselves into 'motor pools'...
  4. Synaptogenesis: Insights From Worm And Fly, Y. Jin , Current Opinion in Neurobiology, Vol. 12, Issue 1, February 2002
  5. Life In The Near Future, R. Lee, Wireless Mgazine, May/June 2002
  6. Sweat And Tears Drive Bugs Apart, H. Pearson, Nature Science Update, May, 2002
  7. IMMUNOLOGY: T Cell Activation In Six Dimensions, Von Andrian, Ulrich H., Science 2002 296: 1815-1817
  8. Plant Mathematics: Fibonacci's Flowers, Amar J. S. Klar, Nature417, 595 (06 Jun 2002) DOI: 10.1038/417595a, Asymmetric cell division offers a possible explanation of the spiral patterns seen in many plants....
  9. Complex Dynamics In A Simple Model Of Pulsations For Super-Asymptotic Giant Branch Stars, A. Munteanu, E. García-Berro, J. José & E. Petrisor, Chaos, Vol. 12, Issue 2, pp. 332-343, June 2002
  10. Computer 'Life' Said Possible, Michael Smith, UPI Science News, 02/06/12, The so-called CyberCell project will have "a profound influence on the way we do life sciences in the future
  11. Biologist's reading of lonely-hearts personal ads reveals what big-city women really want: Men with money, Cornell Press Release

 

20.2 Coming and Ongoing Webcasts

  1. Understanding Complex Systems: Symposium Complexity in Physical and Biological Structures, Medicine & Ecology, Department of Physics, University of Illinois at Urbana-Champaign, 02/05/13-15
  2. ROBOT: The Future of Flesh and Machine, Rodney A. Brooks, MIT AI Lab, Talk given at the School of Cognitive and Computing Sciences of the University of Sussex, May 14th, 2002.
  3. The Body is a Machine, the World is a System: The Convergence of Engineering and the Life Sciences, Cornell Society of Engineers Conference, 02/04/11-13
  4. Powell Voices Support for Scientific Contributions to U.S. Foreign Policy, 139th Annual Meeting of the National Academy of Sciences, Washington, D.C., 02/04/30
  5. Invisible Advantage Webcast, Cambridge, Massachusetts, 02/05/15, Jon Low, Center for Business Innovation Senior Research Fellow, will preview his new book, Invisible Advantage
  6. Introducing Complexity, The University of Liverpool ,02/04/24, (mp3 web-cast and audio download, contributed by Carlos Gershenson)
  7. Symmetry in Science and Art - Symmetry in Chaos, (In German), O.E. Roessler, 01/12/17
  8. Dean LeBaron's Archive of Daily Video Commentary, Ongoing Since February 1998

 

20.3 Conference Announcements 

  1. International Conference SocioPhysics, ZIF - Bielefeld, Germany, 02/06/06-09
  2. International Conference on Complex Systems (ICCS2002), Nashua, NH, 02/06/09-14
  3. Sitges Conference "Statistical Mechanics of Complex Networks", Sitges, Spain, 02/06/10-14
  4. 2nd International Conference on Development and Learning (ICDL'02), Cambridge, Massachusetts USA, 02/06/12-15
  5. AES 22nd International Conference on Virtual, Synthetic And Entertainment Audio, Espoo, Finland, 02/06/15-17
  6. Complex Systems: Control and Modeling Problems, Samara, Russia, 02/06/17
  7. 3rd European Interdisciplinary School on Nonlinear Dynamics for System and Signal Analysis EUROATTRACTOR2002, Warsaw, 02/06/18-27
  8. International Conference: Emergence in Chemical Systems, University of Alaska Anchorage, 02/06/20-23
  9. Plexus Conference - Diffusing Innovations: Learning With Everett Rogers & Each Other, Borgess Navigation Center Kalamazoo, Michigan USA , 02/06/21-22
  10. Let's Face Chaos Through Nonlinear Dynamics, Maribor, Slovenia, 02/06/30 - 07/14
  11. 7th International Conference on Music Perception & Cognition - ICMPC7, Sydney, 02/07/17-21
  12. 20th System Dynamics Conference: Organizational Change Dynamics - Understanding Systems, Managing Transformation, Palermo, Italy, 02/07/28-08/01
  13. Complexity and Philosophy, Norwood, Massachusetts, USA, 02/07/29-30
  14. Workshop On Fluctuations Chaos And Complexity In Multistable Systems, Lancaster University, 02/08/01-07
  15. 12th Ann Intl Conf Society For Chaos Theory in Psychology & Life Sciences: Chaos and Complexity in a Changing World, Portland, OR, USA, 02/08/01-04
  16. International Workshop on Meta-Synthesis and Complex Systems, Shanghai, China, 02/08/07-08
  17. 7th Experimental Chaos Conference, San Diego, USA, 02/08/25-29
  18. Econophysics Conference, Denpasar, Bali, Indonesia, 02/08/29-31
  19. Self-Organisation and Evolution of Social Behaviour, Monte Verità, Switzerland, 02/09/08-13
  20. Complex Systems (CS02) Complexity with Agent-Based Modeling, Chuo University, Tokyo, Japan, 02/09/10-12
  21. 3rd Intl NAISO Symposium on Engineering Of Intelligent Systems (EIS 20020), Malaga, Spain, 02/09/24-27
  22. Seminar on Non-equilibrium Phenomena and Phase Transitions in Complex Systems, Avila, Spain, 02/09/24-28.
  23. ACRI 2002, 5th Intl Conf on Cellular Automata for Research and Industry, Geneva, Switzerland, 02/10/09-11 
  24. Dynamical Systems Methods for Advanced Diagnosis and Prognosis, 39th Annual Technical Meeting of the Society of Engineering Science, University Park, Pennsylvania, 02/10/13-16
  25. 4th Asia-Pacific Conference on Simulated Evolution And Learning (SEAL'02), 9th International Conference on Neural Information Processing (ICONIP'02), International Conference on Fuzzy Systems and Knowledge Discovery (FSKD'02), Singapore, 02/11/18-22
  26. International Conference on Systems, Development and Self-Organization (ICSDS'2002 ),Beijing, 02/11/30-12/01
  27. Managing the Complex IV, Naples , FL, Early December 2002
  28. Artificial Life VIII, UNSW, Sydney, Australia, 02/12/09-13
    1. 1st Workshop on the Modelling of Dynamical Hierarchies in Alife (WDH 2002)
  29. Hawaii International Conference On System Sciences (HICSS-36), Big Island, Hawaii, 03/01/06-09
  30. 21st ICDE World Conference on Open Learning and Distance Education, Hong Kong, 03/06/01-05

20.4 Position Announcement

Staff Memberposition available, Modeling, Algorithms, and Informatics Group (CCS-3), Los Alamos National Laboratory, (...) Current areas of focus relevant to this job include cybersecurity, intelligence analysis for homeland defense, object/target recognition, document classification, bionetwork identification and bio-ontology systems, knowledge network analysis, and collaboration and recommendation technology for digital libraries.
  • Luis Mateus Rocha, Complex Systems Research, MS B256, Los Alamos, NM, (505) 665-1676

 

Complexity Digest is an independent publication available to organizations that may wish to repost ComDig to their own mailing lists. ComDig is published by Dean LeBaron and edited by Gottfried J. Mayer. For individual free e-mail subscriptions send requests to: subscriptions@comdig.org.