Complexity Digest 2002.45

11-Nov-2002

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Content

  1. Election Selection, Are We Using the Worst Voting Procedure?, Science News
  2. How Can Extremism Prevail?, J. Artifi Soc & Soc Sim
  3. Botschafter der Komplexität [Ambassadors of Complexity], Neue Zürcher Zeitung
  4. Group Reputation Supports Beneficent Norms, J. Artifi Soc & Soc Sim
  5. Network Structures and Agreement in Social Network Simulations, J. Artifi Soc & Soc Sim
    1. Emergence Of A Complex And Stable Network In A Model Ecosystem With Extinction And Mutation, arXiv
  6. Animal Social Complexity: Intelligence, Culture And Individualized Societies, Harvard Univ. Press
    1. Anxious Worms Stick Together, Nature Science Update
    2. Animal Behaviour: When It Pays To Waggle, Nature
    3. Male Ants Disguised By The Queen'S Bouquet, Nature
  7. The (Super)Tree Of Life: Procedures, Problems, and Prospects, Annu. Rev. Ecol. Syst.
    1. Evo-Devo Enthusiasts Get Down to Details, Science
  8. Conflict Brewing Over Herbicide's Link to Frog Deformities, Science
  9. Cell Dynamics During Somite Boundary Formation, Science
  10. Why 6-Legged Bots Rule, Wired
  11. An Electronic Cop That Plays Hunches, NYTimes
  12. Materials Science: Molecular "Ghosts", Science
  13. Electronic Nose Detects Pneumonia In Critically Ill Patients, ScienceDaily
  14. Mit Gets Plugged In For Global Data Archive, Nature
    1. Tribes Query Motives Of Knowledge Databases, Nature
    2. Forget the Files and the Folders: Let Your Screen Reflect Life, NYTimes
  15. New Book Offers Insights Into Who We Are, Caltech Press Release
  16. Neuroscience: Addicted, Nature
    1. Neural and Immunological Synaptic Relations,, Science
  17. Fuzzy Sets And Models Of Decision Making, Comp. & Math. with Appl.
  18. The Salmon of Doubt, Book Review
  19. Complex Challenges: Global Terrorist Networks
    1. Terrorist Acts, So Far Apart, Still Share Much In Common, Investor's Business Daily
    2. Yemen Silent on Claim US Drone Killed Militants, Reuters
    3. France Nabs 8 Linked to Tunisia Synagogue Blast, Reuters
  20. Links & Snippets
    1. Other Publications
    2. Webcast Announcements
    3. Conference Announcements
      1. Public Conference  Calls
    4. Complexity: Art and Complex Systems, Art Exhibit
    5. Per Bak, Physicist of Sudden Change, Dies at 54, New York Times

  1. Election Selection, Are We Using the Worst Voting Procedure?, Science News Next Article Bookmark and Share

     Excerpts: (...) using tools from chaos theory to identify just which s enarios of voter preferences will give rise to disturbing election outcomes. (...)

    The paradoxical behavior Arrow studied crops up all the time. Saari points to the 2000 Bush-Gore-Nader race in Florida. "It's a beautiful example of Arrow's theorem at work," Saari says.

    While Arrow's theorem shows that no system is flawless, many capture voter preferences more effectively than plurality voting does. For instance, the paradoxical outcome of the Florida race might have been avoided under the instant runoff,(...)


  2. How Can Extremism Prevail?, J. Artifi Soc & Soc Sim Next Article Bookmark and Share

    Abstract: We model opinion dynamics in populations of agents with continuous opinion and uncertainty. The opinions and uncertainties are modified by random pair interactions. We propose a new model of interactions, called relative agreement model, which is a variant of the previously discussed bounded confidence. In this model, uncertainty as well as opinion can be modified by interactions. We introduce extremist agents by attributing a much lower uncertainty (and thus higher persuasion) to a small proportion of agents at the extremes of the opinion distribution. We study the evolution of the opinion distribution submitted to the relative agreement model. Depending upon the choice of parameters, the extremists can have a very local influence or attract the whole population. We propose a qualitative analysis of the convergence process based on a local field notion. The genericity of the observed results is tested on several variants of the bounded confidence model.

  3. Botschafter der Komplexität [Ambassadors of Complexity], Neue Zürcher Zeitung Next Article Bookmark and Share

    Excerpt  [Machine translation by BabelfishTranslation]: The feature world is multiform and complex. (...) From a number of different disciplines - to call are among other things the chaos theory and the research of systems, which organize themselves - the so-called complexity research developed. The subject of this branch of research are complex systems of the most diverse kind, in which the local interaction from parts to "emergenten" phenomena leads.

    The term of the Emergenz gladly with the sentence "the whole is more than the sum of its parts" described and is an important concept of the complexity research.


  4. Group Reputation Supports Beneficent Norms, J. Artifi Soc & Soc Sim Next Article Bookmark and Share

    Abstract: This paper demonstrates the role of group normative reputation in the promotion of an aggression reducing possession norm in an artificial society. A previous model of normative reputation is extended such that agents are given the cognitive capacity to categorise other agents as members of a group. In the previous model reputational information was communicated between agents concerning individuals. In the model presented here reputations are projected onto whole groups of agents (a form of "stereotyping"). By stereotyping, norm followers outperform cheaters (who do not follow the norm) under certain conditions. Stereotyping, by increasing the domain of applicability of a piece of reputational information, allows agents to make informed decisions concerning interactions with agents which no other agent has previously met. However, if conditions are not conducive, stereotyping can completely negate norm following behaviour. Group reputation can be a powerful mechanism, therefore, for the promotion of beneficent norms under the right conditions.

  5. Network Structures and Agreement in Social Network Simulations, J. Artifi Soc & Soc Sim Next Article Bookmark and Share

    Abstract: Networks are very evident in the physical world and particularly in social structures. One focus of research is on investigating the development and maintenance of social network structures. Social networks may be typically categorised as random, scale-free or hierarchical structures. A key research question is how the structure and parameters of a network affect the stability of opinion within the network. In a previous study, we examined the case for random network structures. In this work, we show how complex systems models can be used to investigate the effects of various parameters (including the number of layers and the number of links per node) in hierarchical and scale-free network structures. The models are used to investigate whether the network reaches a stable collective state, where the opinions of individuals remain constant, or an unstable state, where the opinions of individuals continue to change. Several important results emerge. One is that flat hierarchies, which possess few layers and many links per node, are more likely to be unstable than deeper hierarchies. Another is that regardless of the network topology, the number individuals whose opinion continues to change settles to a relatively stable level.

    1. Emergence Of A Complex And Stable Network In A Model Ecosystem With Extinction And Mutation, arXiv Next Article Bookmark and Share

      Abstract: We propose a minimal model of the dynamics of diversity -- replicator equations with extinction, invasion and mutation. We numerically study the behavior of this simple model and show that it displays completely different behavior from the conventional replicator equation and the generalized Lotka-Volterra equation. We reach several significant conclusions as follows: (1) a complex ecosystem can emerge when mutants with respect to species-specific interaction are introduced; (2) such an ecosystem possesses strong resistance to invasion; (3) a typical fixation process of mutants is realized through the rapid growth of a group of mutualistic mutants with higher fitness than majority species; (4) a hierarchical taxonomic structure (like family-genus-species) emerges; and (5) the relative abundance of species exhibits a typical pattern widely observed in nature.

  6. Animal Social Complexity: Intelligence, Culture And Individualized Societies, Harvard Univ. Press Next Article Bookmark and Share

    Book Review: (…) intelligence, at least in monkeys and apes, evolved as an adaptation to the complicated social milieu of hard-won friendships and bitterly contested rivalries. Social complexity turns out to be widespread indeed. For example, in many animal societies one individual's innovation, such as tool use or a hunting technique, may spread within the group, thus creating a distinct culture. As this collection of studies on a wide range of species shows, animals develop a great variety of traditions, which in turn affect fitness and survival. (…) future research into complex animal societies and intelligence will change the perception of animals as gene machines (…).
    • Animal Social Complexity: Intelligence, Culture, And Individualized Societies, C. Boesch, S. T. Boysen, J. W. Bradbury, D. L. Cheney, R. C. Connor, S. Creel, F. B. M. de Waal, R. O. Deaner, A. E. Dizon, C. M. Drea, A. Engh, K. Evans, S. E. Treviño, L. G. Frank, K. I. Hallberg, K. E. Holekamp, L. Huber, J. Hyde, A. P. King, M. Kruetzen, M. Mannu, T. Matsuzawa, W. C. McGrew, S. L. Mesnick, D. A. Nelson, T. Nishida, C. L. Nunn, E. B. Ottoni, L. A. Parr, S. Pandolfi, K. Payne, S. Perry, S. Preuschoft, A. E. Pusey, J. L. Sands, R. J. Schusterman, R. M. Seyfarth, B. L. Taylor, J. A.R.A.M. van Hooff, C. P. van Schaik, P. L. Tyack, B. Voekl, S. Wahaj, R. S. Wells, M. J. West, D. J. White, H. Whitehead, G. S. Wilkinson, H. Yurk & K. Zuberhuler, To be Published, February 2003, Harvard Univ. Press, ISBN 0-674-00929-0
    • Contributed by Atin Das

    1. Anxious Worms Stick Together, Nature Science Update Next Article Bookmark and Share

      Excerpts: Researchers have found a set of genes that control whether feeding worms clump together or go it alone.

      The genes are switched on in nerve cells known to sense stressful situations. This is intriguing, because a previously discovered gene that influences a worm's social tendencies is related to one that controls humans' responses to stress.

      If the links between genes, nerves and behaviour could be completed, we might better understand how anxiety affects our differing needs for solitude and company.

       


    2. Animal Behaviour: When It Pays To Waggle, Nature Next Article Bookmark and Share

      Excerpts: The waggling dance of honeybees conveys navigational information about where food is to be found. But it seems that the information is valuable only in certain circumstances.

      (...) The second experiment addressed this question by comparing the rate of gain of mass (presumably, mostly nectar) by colonies during periods of oriented and disoriented dancing. Somewhat surprisingly, the rate of gain was not always higher during periods of oriented dancing. Although there was a strong overall effect of oriented dances, the advantage was pronounced only in the winter (...).


    3. Male Ants Disguised By The Queen'S Bouquet, Nature Next Article Bookmark and Share

      Excerpt: Males of the tropical ant Cardiocondyla obscurior are either wingless and aggressive or winged and docile, and both compete for access to virgin queens in the nest. Although the fighter males (ergatoids) attack and kill other ergatoids, they tolerate and even attempt to mate with their winged rivals. Here we show that the winged males avoid the aggression of wingless males by mimicking the chemical bouquet of virgin queens, but that their mating success is not reduced as a result.


  7. The (Super)Tree Of Life: Procedures, Problems, and Prospects, Annu. Rev. Ecol. Syst. Next Article Bookmark and Share

    Abstract: Supertree construction is a new, rigorous approach for combining phylogenetic information to produce more inclusive phylogenies. It has been used to provide some of the largest, most complete phylogenies for diverse groups (e.g., mammals, flowering plants, and dinosaurs) at a variety of taxonomic levels. We critically review methods for assembling supertrees, discuss some of their more interesting mathematical properties, and describe the strengths and limitations of the supertree approach. To document the need for supertrees in biology, we identify how supertrees have already been used beyond the systematic information they provide to examine models of evolution, test rates of cladogenesis, detect patterns of trait evolution, and extend phylogenetic information to biodiversity conservation.

    1. Evo-Devo Enthusiasts Get Down to Details, Science Next Article Bookmark and Share

      Excerpts: (...) a slight alteration in where a gene called sonic hedgehog was active in the developing head caused eyes to form or not form (...).

      "Often what is compared is just the end physical and physiological appearance] rather than the actual developmental pathway that led to its production," (...). He would like to see a more sophisticated approach in which researchers figure out the interplay between genetics and development, keeping in mind that changing either one too much or too fast will lead to organisms incapable of procreating.


  8. Conflict Brewing Over Herbicide's Link to Frog Deformities, Science Next Article Bookmark and Share

    Excerpts: (...) potential link between atrazine, one of the most widely used herbicides in the United States, and the decline of amphibians.

    (...) suggesting that exposure to very low levels of atrazine in the wild is turning male frogs into hermaphrodites. But new experimental results in another frog species, (...), cast doubt on such low-dose effects. (...)

    Counterintuitively, the lowest doses of atrazine appear to be the bitterest pill for frogs. But other teams, including Carr's, say that they have been unable to replicate Hayes's original Xenopus findings.


  9. Cell Dynamics During Somite Boundary Formation, Science Next Article Bookmark and Share

    Excerpts:  We follow somite [= one of the longitudinal series of segments into which the body of many animals (...) is divided, Merriam-Webster's Collegiate Dictionary] segmentation in living chick embryos and find that the shaping process is not a simple periodic slicing of tissue blocks but a much more carefully choreographed separation in which the somite pulls apart from the segmental plate. Cells move across the presumptive somite boundary and violate gene expression boundaries thought to correlate with the site of the somite boundary. (...) The results offer a detailed picture of somite shaping and provide a spatiotemporal framework for linking gene expression with cell movements.

  10. Why 6-Legged Bots Rule, Wired Next Article Bookmark and Share

    Excerpts: Forget two-legged bots — forget androids altogether. Bio-guru Robert Full has seen the future of robotics, and it's one part cockroach, one part millipede, one part Internet.(...)

    Moving forward without falling over is a skill nature has been working on for a long time. (...)

    Having studied a diversity of animals, (...) come to the surprising conclusion that no matter how many legs a creature has or how its legs are connected to its body — or what its skeleton is made of — all legs basically work the same way.

     


  11. An Electronic Cop That Plays Hunches, NYTimes Next Article Bookmark and Share

    Excerpts: All of the information that was collected including that from other computer database systems like the Federal Bureau of Investigation's Rapidstart is now being downloaded into the Coplink database so that the accumulated data can be compared, (...).

    "It's the Google for law enforcement," (...). "Things that a human can do intuitively we are getting the computer to do, too."

    (...), the idea behind Coplink is to provide a computer program that can save busy police officers precious time and sometimes even help solve cases.


  12. Materials Science: Molecular "Ghosts", Science Next Article Bookmark and Share

    Summary: Transformations that preserve single crystals of organic molecules usually must avoid large motions of the lattice that would shatter the crystal and have mainly been seen in systems where double bonds convert to single bonds or where guest molecules move through pores. (...) observed a host-guest transformation where the addition of the guest to a nonporous host led to large-scale cooperative motion of the atoms, and thus maintained a single crystal. Once the transformation was initiated, it proceeded to equilibrium, even when the host was only partially saturated with guest molecules.

  13. Electronic Nose Detects Pneumonia In Critically Ill Patients, ScienceDaily Next Article Bookmark and Share

    Excerpts: (…) an electronic nose - a relatively new version of a sensor previously used in the food, wine and perfume industries - can quickly and accurately diagnose pneumonia in critically ill, mechanically ventilated patients.
    > "Rather than waiting two to three days for the results of a bacterial culture or relying on chest X-rays which aren't always accurate, the e-nose can give us a head start toward a proper diagnoses. We could avoid over-prescribing powerful antibiotics which are usually given to patients while we're waiting for their test results, even though we don't know if they actually need them."

  14. Mit Gets Plugged In For Global Data Archive, Nature Next Article Bookmark and Share

    Excerpt: The ultimate goal of the system is to capture MIT's entire intellectual output in a stable archive, and to extend it to create a seamless global network of similar archives at other research institutions. These multiple databases could be searched as if they were a single entity, and specialized collections could be built by drawing data from participating archives.

    More than 40 academic institutions worldwide are considering adopting DSpace, and seven universities, including the University of Cambridge in Britain, are installing and evaluating the system.


    1. Tribes Query Motives Of Knowledge Databases, Nature Next Article Bookmark and Share

      Excerpts: The World Intellectual Property Organization (WIPO), the Geneva-based body that promotes intellectual property rights, is keen to establish databases in which indigenous groups would record their cultural knowledge. Patent examiners would be encouraged to check a country's databases to see if a new idea, such as a plant-based medicine, is part of the traditional knowledge of that nation.

      But delegates at the World's Indigenous Peoples conference, (...), described how some groups are concerned that the databases could be used to exploit their cultural heritage.


    2. Forget the Files and the Folders: Let Your Screen Reflect Life, NYTimes Next Article Bookmark and Share

      Excerpts: An operating system connects the user (and the user's software) to the ensemble of machines we call a computer. But nowadays users no longer want to be connected to computers. They want to be connected to information, a claim that sounds vague but is clear and specific.

      Every piece of digital information you own or share will appear (in the near future) in one universal structure. (...) A universal structure demands universal access: you'll be able to tune in this structure from any Net-connected computer anywhere.


  15. New Book Offers Insights Into Who We Are, Caltech Press Release Next Article Bookmark and Share

    Excerpt: (...) Steven R. Quartz's new book, <i>Liars, Lovers, and Heroes: What the New Brain Science Reveals About How We Become Who We Are</i>. (...) The book (...) suggests a new way of looking at brain development and evolution. Ut presents insights into such enduring questions as what shapes personality, why we live in groups, the roots of violence, the nature of intelligence, and the biology of happiness. (...) The author's [sic] make the point that the development of the brain and behavior depends as much on interactions with human culture as it does on our genes. (...)

  16. Neuroscience: Addicted, Nature Next Article Bookmark and Share

    Excerpts: "When you are addicted, there is no euphoria when you shoot up," explains Christian. "You only want heroin. Food and sex are not interesting. You are capable of being aroused, but you have no desire." (...)

    A natural rewarding activity such as sex or food will increase dopamine levels in the nucleus accumbens by 50–100%," says Roy Wise, a psychologist who pioneered research into reward circuitry and is now at the National Institute on Drug Abuse (...). "A dose of cocaine or amphetamine can increase it by up to 1,000- fold."


    1. Neural and Immunological Synaptic Relations,, Science Next Article Bookmark and Share

      Abstract: A synapse is a stable adhesive junction between two cells across which information is relayed by directed secretion. The nervous system and immune system utilize these specialized cell surface contacts to directly convey and transduce highly controlled secretory signals between their constituent cell populations. Each of these synaptic types is built around a microdomain structure comprising central active zones of exocytosis and endocytosis encircled by adhesion domains. Surface molecules that may be incorporated into and around the active zones contribute to modulation of the functional state of the synapse.

  17. Fuzzy Sets And Models Of Decision Making, Comp. & Math. with Appl. Next Article Bookmark and Share

    Abstract: Results of research into the use of fuzzy sets for handling various forms of uncertainty in optimization problems related to the design and control of complex systems are presented. Much attention is given to considering the uncertainty of goals that is associated with a multicriteria character of many optimization problems. The application of a multicriteria approach is needed to solve (1) problems in which solution consequences cannot be estimated on the basis of a single criterion (…) and (2) problems that may be considered on the basis of a single criterion but their unique solutions are not achieved because the uncertainty of (…).


  18. The Salmon of Doubt, Book Review Next Article Bookmark and Share

    Brief Review: The Salmon of Doubt_ consists of a collection of Douglas Adams' essays, articles, and correspondences as well as an unfinished (and unpolished) work. It starts Dirk Gently, although all indications are that he intended to convert it to a Hitchhiker's Guide book. Moreover, as stated in one of his letters, "Jokes, lightly poached fish, and the emergent properties of complex systems form the background to Dirk Gently's most baffling and incomprehensible case." Notions from complex systems have appeared previously in Dirk Gently books---he does run a "holistic" detective agency, after all. The unfinished novel, which was assembled from documents on Adams' computers, is quite rough, but many of the essays and articles are very insightful and entertaining. Although they appeared in various magazines throughout, it is convenient to have them all collected in one place. Adams touches on notions from complex systems in several of these as well. In sum, _The Salmon of Doubt_ is worth reading to get a final chance to peer into Douglas Adams' mind. He was one of the great satirists of our time, and anybody who even dabbles in science owes it to themselves to read his novels.

     


  19. Complex Challenges: Global Terrorist Networks Next Article Bookmark and Share

    1. Terrorist Acts, So Far Apart, Still Share Much In Common, Investor's Business Daily Next Article Bookmark and Share

      Excerpts: We need to learn about the chain of unpredictability and the predictability of unpredictability, said Irene Sanders, head of the Washington Center for Complexity and Public Policy. Old definitions about terrorism limit imagination, says Sanders. A sniper and an Islamist bomber are both committing terrorist acts. Terrorism is a mind-set. It has many faces. It plays itself out in behavior, said Sanders. What’s important is not the label, but our response, (...).

      To fight terror, we must look for gaps in our thinking, she says. We need to think like the enemy.


    2. Yemen Silent on Claim US Drone Killed Militants, Reuters Next Article Bookmark and Share

      Excerpt: A U.S. official in Washington said Monday the car was destroyed by a missile fired from an unmanned Central Intelligence Agency (CIA) aircraft. The Defense Department and CIA declined to comment.

      Yemen said Monday arms, traces of explosives and communications equipment were found in the car.

      One of the dead, Qaed Senyan al-Harthi, also known as Abu Ali, was a key suspect in the 2000 suicide bombing of the U.S. warship Cole in the southern Yemeni port of Aden.


    3. France Nabs 8 Linked to Tunisia Synagogue Blast, Reuters Next Article Bookmark and Share

      Excerpt: Eight people were arrested in France on Tuesday in the bombing of North Africa's oldest synagogue which killed 21 people including 14 German tourists in Tunisia in April, the Interior Ministry said.

      Al Qaeda, the group the United States blames for the September 11 attacks last year, claimed responsibility for the tanker truck explosion outside El Ghriba synagogue, a Jewish place of worship on the southern island of Djerba.

      Documents seized during the arrests in suburbs of Lyon seemed to make a direct link between the suspects and the April 11 bombing, (...).


  20. Links & Snippets Next Article Bookmark and Share

    1. Other Publications Next Article Bookmark and Share

      1. Education: 100 Top High Schools, and One Grain of Salt, NYT, Jacques Steinberg, Lloyd Thacker, a Portland, Ore., high school guidance counselor, believes the percentage of applicants rejected by a university each year reflects little about what occurs in a classroom.
      2. Neuronal Activity Regulates Correlated Network Properties of Spontaneous Calcium Transients in Astrocytes In Situ, Fernando Aguado, Juan F. Espinosa-Parrilla, Maria A. Carmona, Eduardo Soriano, J. Neurosci. 2002 November 1; 22(21): p. 9430-9444
      3. Neural Correlates of Recency Judgment, Seiki Konishi, Idai Uchida, Tomoyuki Okuaki, Toru Machida, Ichiro, Shirouzu, and Yasushi Miyashita, J. Neurosci. 2002 November 1; 22(21): p. 9549-9555
      4. BioMedNet's Conference Reporter at Society for Neuroscience, Orlando, Florida, 2-7 November 2002, Conference coverage, View reports
      5. Electrophysiological Responses in the Human Amygdala Discriminate Emotion, Categories of Complex Visual Stimuli, Hiroyuki Oya, Hiroto Kawasaki, Matthew A. Howard, III, Ralph Adolphs, J. Neurosci. 2002 November 1; 22(21): p. 9502-9512
      6. Estimating Divergence Times From Molecular Data On Phylogenetic And Population Genetic Timescales Brian S. Arbogast, Scott V. Edwards, John Wakeley, Peter Beerli, and Joseph B. Slowinski, Annu. Rev. Ecol. Syst. 2002 January 1; 33(1): p. 707-740
      7. The Mesozoic Radiation Of Birds, Luis M. Chiappe, Gareth J. Dyke, Annu. Rev. Ecol. Syst. 2002 January 1; 33(1): p. 91-124
      8. Model Behavior, Eric Bonabeau, Valdis Krebs, Optimize, October 2002
      9. Ethnicity Influences Skull Shape More Than Environment, Researchers Say, Bill Bergstrom, The Associated Press, 10/30/02
      10. Classical ODE and PDE which Obey Quantum Dynamics, Paul J. Werbos, International Journal of Bifurcation and Chaos, 10/2002
      11. Maths Proves Tetris is Tough, Addictive Puzzle Even Stumps Computers, Nature Science Update, 02/10/28
      12. Intelligence and Cooperative Search by Coupled Local Minimizers. J.A.K. Suykens, J. Vandewalle, B. De Moor. arXiv. 2002-10-30
      13. Graph Theory and the Evolution of Autocatalytic Networks. Sanjay Jain and Sandeep Krishna. arXiv. 2002-10-30
      14. Emergence of a Complex and Stable Network in a Model Ecosystem with Extinction and Mutation, Kei Tokita and Ayumu Yasutomi. arXiv. 2002-10-31
      15. Identifying Cases of Social Contagion using Memetic Isolation: Comparison of the Dynamics of a Multisociety Simulation with an Ethnographic Data Set, Derek Gatherer, Journal of Artificial Societies and Social Simulation vol. 5, no. 4, 2002-10-31
      16. Complexity Information Based Analysis Of Pathological ECG Rhythm For Ventricular Tachycardia And Ventricular Fibrillation, Z. Hongxuan, Z. Yisheng & X. Yuhong, Int. J. Bifur. and Chaos,Vol. 12, No. 10, pp:2293-2303, Oct. 2002, doi:10.1142/S0218127402005856
      17. A Global Synchronization Criterion For Coupled Chaotic Systems Via Unidirectional Linear Error Feedback Approach, G. P. Jian & W. S. Tang, Int. J. Bifur. and Chaos, Vol. 12, No. 10,pp:2239-2253, Oct. 2002, doi:10.1142/S0218127402005790
      18. Reconstruction And Synchronization Of Hyperchaotic Circuits Via One State Variable, M. Itoh & L. O. Chua, Int. J.  Bifur.  and Chaos, Vol. 12, No. 10, pp:2069-2085, doi:10.1142/S0218127402005704
      19. Chaos In A Three-Dimensional General Model Of Neural Network, A. Das, P. Das & A. B. Roy, Int. J. of Bifur. and Chaos, Vol. 12, No. 10, pp: 2271-2281, Oct. 2002, On -line 10/31/2002, doi:10.1142/S0218127402005820
      20. The Onset Of Synchronization In Systems Of Globally Coupled Chaotic And Periodic Oscillators, E. Ott , P. So, E. Barretob & T. Antonsen, Physica D, Vol. 173, Issues 1-2, pp:29-51, 12/01/ 2002, DOI: 10.1016/S0167-2789(02)00663-2
      21. Singularity Comparison Between 1/f Fluctuations With Statistical Analysis Of Wavelet Maxima, L. Du,  & Y. Zhuang, Physica D, Vol. 173, Issues 1-2, , pp:52-58, 12/01/2002, DOI: 10.1016/S0167-2789(02)00651-6
      22. Weed–Plant Discrimination By Machine Vision And Artificial Neural Network, S. I. Cho, D. S. Lee & J. Y. Jeong, Biosys. Engg., Vol. 83, Issue 3, pp:275-280, Nov. 2002, DOI: 10.1006/bioe.2002.0117
      23. Output Feedback Design For Uncertain Systems With Delays, M. S. Mahmoud & M. Zribi, IMA J. of Math. Control and Info., Vol. 19, Issue 3, pp:297-312, Sept. 2002
      24. New Tool For Studying Animal Models Of Neurological And Psychiatric Diseases, ScienceDaily, 11/6/2002
      25. Nonlinear Observer Design For Discrete-Time Bifurcating Systems, V. Sundarapandian, Math. and Comp. Modelling, Vol. 36, Issues 1-2, pp:211-215, Online 29 October 2002, DOI: 10.1016/S0895-7177(02)00117-6
      26. Stochastic Modelling Of Traffic Flow, I. Bonzani & L. Mussone, Math. and Comp. Modelling, Vol 36, Issues 1-2, pp:109-119, Online 29 October 2002, DOI: 10.1016/S0895-7177(02)00107-3
      27. Estimation Of Chaotic Parameter Regimes Via Generalized Competitive Mode Approach, W. Yao, P. Yu & C. Essex, Comm. Nonlin. Sc. and Numer. Simul., Vol. 7, Issue 4, pp:197-205, Dec .200, DOI: 10.1016/S1007-5704(02)00021-7
      28. Non-Linear Multiple Regression Models To Estimate The Drop Damage Index Of Fruit, P. Menesattia, G. Pagliaa, S. Solainia, A. Zanellab, R. Stainerb, C. Costac & M. Cecchettic, Biosys. Engg., Vol. 83, Issue 3, pp:319-326, Nov. 2002, DOI: 10.1006/bioe.2002.0116
      29. Dynamic Model Of Market Of Patents And Equilibria In Technology Stocks, A. Kryazhimskii, C. Watanabe & Y. Tou, Comp. & Math. with Appl., Vol .44, Issue 7, pp:979-995, Oct. 2002, DOI: 10.1016/S0898-1221(02)00208-0
      30. The Quantum Brain: The Search for Freedom and the Next Generation of Man (Rev. in Alphagalileo), J. Satinover, John Wiley, Sons, ISBN 0471441538, Pub. Date 18 April 2002, (...) argument that quantum mechanics-or the notion that subatomic particles in the brain can freely choose to behave (...)

    2. Webcast Announcements Next Article Bookmark and Share

      1. 7th Experimental Chaos Conference, San Diego, Ca, 02/08/26-29, Video/Audio Report
      2. Seventh International Conference on the Simulation of Adaptive Behavior, Edinburgh, UK, 02/08/04-11, Video/Audio Reports
      3. The Technology Frontier, Gemini Ernst & Young Center for Business Innovation, 02/09/18
      4. Brookings Report Urges Congress to Revise President Bush's Homeland Security Proposal, A Brookings Press Briefing, 02/07/15, Event Video
      5. International Conference on Complex Systems (ICCS2002), Nashua, NH, 02/06/09-14 (video + mp3 downloadable audio)
      6. 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
      7. 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.
      8. Dean LeBaron's Archive of Daily Video Commentary, Ongoing Since February 1998

    3. Conference Announcements Next Article Bookmark and Share

      1. Managing Complex Organizations In A Complex World, NECSI, Boston, MA, 02/11/14-15
      2. American Association for Artificial Intelligence (AAAI) Fall Symposium on Chance Discovery: The Discovery and Management of Chance Events, North Falmouth, MA, USA, 02/11/15-17
      3. 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
      4. Workshop on Modeling Complex Systems, University of Nevada, Reno, 02/11/20-21
        1. One-Day Course: Introduction to Complex Systems, Univ Nevada, Reno, 02/11/19
      5. Strengthening Your Capacity for Healthier Communities, PlexusInstitute, Los Angeles, 02/11/22-23
      6. International Conference on Systems, Development and Self-Organization (ICSDS'2002 ),Beijing, 02/11/30-12/01
      7. 23rd Army Science Conference (ASC): "Transformational Science & Technology for the Army....a race for speed and precision.", Orlando Fl, 02/12/02-05
      8. Managing the Complex IV, ISCE and FGCU, Fort Myers, FL, 02/12/07-10
      9. Artificial Life VIII, UNSW, Sydney, Australia, 02/12/09-13
        1. 1st Workshop on the Modelling of Dynamical Hierarchies in Alife (WDH 2002)
      10. UK Special Interest Group on Multi-Agent Systems (UKMAS-02), Liverpool, UK, 02/12/18-19
      11. One-Week Intensive Course: Complex Physical, Biological and Social Systems, NECSI, Cambridge, MA, 03/01/06-10
      12. Hawaii International Conference On System Sciences (HICSS-36), Big Island, Hawaii, 03/01/06-09
      13. INSC 2003, International Nonlinear Sciences Conference Research and Applications in the Life Sciences,Vienna, Austria, 03/02/07-09
      14. 2003 AAAI Spring Symposium Series, Computational Synthesis: From Basic Building Blocks To High Level Functionality, Stanford, 03/03/24-27
      15. Jahrestagung 2003 des AKSOE (Physics of Socio-Economical Systems), Dresden, Germany, 03/03/24-28
      16. Uncertainty and Surprise: Questions on Working with the Unexpected, U. of Texas at Austin, Texas, 03/04/10-12
      17. SPIE's First International Symposium on Fluctuations and Noise, Santa Fe, NM, 03/06/01-04
      18. 21st ICDE World Conference on Open Learning and Distance Education, Hong Kong, 03/06/01-05
      19. 2003 Genetic and Evolutionary Computation Conference (GECCO-2003), Chicago, IL,03/07/12-16
      20. Second International Joint Conference on Autonomous Agents and Multi-Agent Systems (AAMAS-2003), Melbourne, Australia, 03/07/14-18
      21. 2003 IEEE/WIC Intl Joint Conf. Web Intelligence and Intelligent Agent Technology, Beijing, China, 03/10/13-17
      22. On the Prospects of Chaos Aware Traffic Modeling, A. Fekete, M. Marodi, G. Vattay, arXiv

      1. Public Conference  Calls Next Article Bookmark and Share

        1. PlexusCalls - John Holland in Conversation - Audio File Available Now, mp3 (28mb)
        2. Are Disease and Aging Information/Complexity Loss Syndromes?, PlexusCalls, 02/11/08, 1 - 2 pm EST (To learn more about Ary Goldberger’s work and HeartSongs, Music of the Heart.)
        3. The Complexity of Entrepreneurship: A Launchcyte Story, PlexusCalls, 02/11/22, 1 - 2 pm EST

    4. Complexity: Art and Complex Systems, Art Exhibit Next Article Bookmark and Share

      Complexity: Art and Complex Systems, SUNY, New Paltz, 02/09/14-11/24, COMPLEXITY is the second major museum exhibition about complex systems. It creates bridges across many branches of science and also offers a revolutionary intellectual vector that has ramifications for other disciplines such as art and philosophy.

    5. Per Bak, Physicist of Sudden Change, Dies at 54, New York Times Bookmark and Share

      Per Bak, Physicist of Sudden Change, Dies at 54, George Johnson, New York Times, 02/10/29, Dr. Per Bak, an intellectually pugnacious physicist who sought to understand how complexity arises in the world, died on Oct. 16 in Copenhagen. He was 54.

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