Complexity Digest 2001.40

01-Oct-2001

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Content

  1. Quantum Physics: Entangled Atomic Samples, Nature
    1. Trillion-Atom Triumph, Nature
    2. Atom Experiment Brings Teleportation a Step Closer, Yahoo/Reuters
    3. Experimental Long-Lived Entanglement Of Two Macroscopic Objects, Nature
  2. Creep and Mechanical Oscillator Damping, arXiv
  3. Earliest Presence Of Humans In Northeast Asia, Nature
    1. A Glimpse of Humans' First Journey Out of Africa, Science
    2. Tools Show Humans Reached Asia Early, Science
  4. Evolutionary Pulse Found, But Complexity as Well, Science
    1. Unhatched Eggs Help Dinos Get a Head, Science
    2. Embryonic Skulls of Titanosaur Sauropod Dinosaurs, Science
  5. All Creatures Great And Small, Nature
  6. The Salesman And The Tourist, Nature
  7. National: New Drug-Offender Program Draws Unexpected Clients, NYTimes
  8. Munchausen Syndrome by Proxy: Tall Tales and Real Hurts, Clinician Reviews
  9. Organs Await Blood Vessels' Go Signal, Science
  10. Brain Area Holding 'Sense Of Self' Found, Discovery News/Reuters
  11. A Cortical Area Selective for Visual Processing of the Human Body, Science
    1. Pattern and Object Recognition, Science
    2. The Face of Controversy, Science
    3. Structural Encoding of Human and Schematic Faces: Holistic and Part-Based Processes, J. Cogn. Neurosci.
    4. Distributed and Overlapping Representations of Faces and Objects in Ventral Temporal Cortex, Science
    5. Face Processing Occurs Outside The Fusiform `Face Area' In Autism, Brain
  12. The Context of Uncertainty Modulates the Subcortical Response to Predictability, J. Cogn. Neurosci.
  13. Amygdala's Inner Workings, The Scientist
  14. Neuroimaging Of Cognitive Functions In Human Parietal Cortex, Neurobiology
  15. Neuronal Circuit Dynamics: The Sociology Of Neurons, Riken BSI News
  16. Detection of Sounds in the Auditory Stream: Differential Activation to Speech and Nonspeech, J. Cogn. Neurosci.
  17. Internet Stays Small World, TRN News
    1. World Wide Web Scaling Exponent From Simon's 1955 Model, Physical Review E
  18. New Network To Eavesdrop On Earth, Discovery News
  19. Complex Challenges: Global Terrorist Networks
    1. A New Mindset for Warfare, Washingtonpost.com
    2. America's Response to Terrorism: Reaction at Home and Abroad, Brookings Video
    3. In the Next Chapter, Is Technology an Ally?, NYTimes
    4. Chaos: The Coming Technology War, Yahoo/ www.NewsFactor.com
  20. Links & Snippets
    1. Applicability Of Lyapunov Exponent In EEG Data Analysis, Complexity International
    2. Conference Announcements

  1. Quantum Physics: Entangled Atomic Samples, Nature Next Article Bookmark and Share

    Excerpts: Quantum mechanics has potential applications in communication and computation. But first a quantum connection - known as entanglement - has to be created between bigger and bigger objects. (…)

    Entangled states are needed for teleportation experiments, in which one can transfer the (quantum) properties of one object to another in a different location, (…).

    To date, entangled states of a few atoms and photons have been prepared in a number of experiments. But some applications need much bigger entangled objects, formed by a large number of atoms.


    1. Trillion-Atom Triumph, Nature Next Article Bookmark and Share

      For the first time physicists have forged quantum entanglement between two large blobs of gas. The achievement brings closer the possibility of super-fast quantum computers and teleportation.

      Eugene Polzik and his co-workers (…) entangled about a million million caesium atoms. Four was the previous record.(…)

      Polzik and colleagues forgo full entanglement (…). Instead, they generate two loosely entangled clouds of caesium gas, (…)

      The interdependence of these clouds is more resilient to measurements or interactions that alter the quantum states of just a few of the constituent atoms.

      Editor's Note: This robustnes property makes it more plausible to expect that quantum computation based on "loose entanglement" might have evolved in biological systems. The time-scales of milliseconds -over which the entangled state could be maintained- is well within biological domains.


    2. Atom Experiment Brings Teleportation a Step Closer, Yahoo/Reuters Next Article Bookmark and Share

      Excerpts: Physicists in Denmark have made two samples of trillions of atoms interact at a distance in an experiment which may bring Star Trek-style teleportation and rapid quantum computing closer to reality. (...)

      It involves quantum entanglement -- a mysterious concept of entwining two or more particles without physical contact. (...)

      Entangled states are needed for quantum computing and teleportation. Scientists have entangled states of a few atoms in earlier experiments but Polzik and his team have done it with very large numbers and using laser light.


    3. Experimental Long-Lived Entanglement Of Two Macroscopic Objects, Nature Next Article Bookmark and Share

      Excerpts: Entanglement is considered to be one of the most profound features of quantum mechanics. (…)

      It is generally believed that entanglement is usually manifest in systems consisting of a small number of microscopic particles. Here we demonstrate experimentally the entanglement of two macroscopic objects, each consisting of a caesium gas sample containing about 1012 atoms. Entanglement is generated via interaction of the samples with a pulse of light, which performs a non-local Bell measurement on the collective spins of the samples


  2. Creep and Mechanical Oscillator Damping, arXiv Next Article Bookmark and Share

    Abstract: Although "friction" is included in many models of oscillator damping, including viscous ones applied to the pendulum; they "miss the mark" with regard to a conceptual understanding of the mechanisms responsible for energy loss. The theory of the present paper corrects some of these misunderstandings by considering the influence of internal friction which derives from the structural members of the oscillator through secondary rather than primary creep. The simple model properly describes the variation of Q with frequency.

    Author's Note: "(...) it also has elements of complexity in a seemingly simple system that is possibly interesting to the digest's readers. To my knowledge, secondary creep in mechanical oscillators has been previously overlooked. It is an issue of importance, not only to pedagogy, but in applications that go all the way to the forefronts of physics in the work of LIGO. Also surprising is the apparent importance of the uncertainty principle as a factor in trying to verify some very old classical physics. Again, I know of nobody who has thought about such matters."


  3. Earliest Presence Of Humans In Northeast Asia, Nature Next Article Bookmark and Share

    Excerpts: The timing of the earliest habitation and oldest stone technologies in different regions of the world remains a contentious topic in the study of human evolution. (…). Coupled with an estimated rate of sedimentation, these findings constrain the layer's age to roughly 1.36 million years ago. This result represents the age of the oldest known stone assemblage comprising recognizable types of Palaeolithic tool in east Asia, and the earliest definite occupation in this region as far north as 40° N.

    1. A Glimpse of Humans' First Journey Out of Africa, Science Next Article Bookmark and Share

      Excerpts: Yet it is not at all certain that these early immigrants out of Africa were directly ancestral to the humans found at key European sites such as Atapuerca in Spain, Ceprano in Italy, or Tautavel (see map). The fossil humans at all those sites are at least a million years younger than those at Dmanisi. (…) may have been the forebears of the first humans in Asia, who are thought to have appeared between 1.8 million and about 1 million years ago (…).


    2. Tools Show Humans Reached Asia Early, Science Next Article Bookmark and Share

      If Africa was the cradle of humanity, then Asia was the crossroads of early human migrations. Asia was the first continent that early humans explored on their exodus from Africa and was the jumping-off point for later treks to the New World, Australia, and perhaps Europe. But exactly when early humans first reached Asia has long mystified paleoanthropologists. The first signs of their presence are Homo erectus fossils dated to between 1.7 million and 1.9 million years ago in Dmanisi, Georgia, on Asia's western edge


  4. Evolutionary Pulse Found, But Complexity as Well, Science Next Article Bookmark and Share

    Excerpt: Species come and species go. A huge asteroid or comet brought an untimely end to all the dinosaurs, giving mammals their chance, but why are we humans dominating the planet rather than some big, furry equivalent of Tyrannosaurus rex? The answer, according to one much-discussed theory, is climate change: The world took an abrupt step toward glaciation, the East African cradle of the human species dried to grasslands, and human ancestors coped with dwindling forests by evolving bigger and better brains.

    1. Unhatched Eggs Help Dinos Get a Head, Science Next Article Bookmark and Share

      Excerpt: Rugged as they look, fossilized dinosaur skulls are frustratingly hard to find. Exposure, scavengers, and flash floods ensured that few of the information-laden artifacts survived their day. Miraculously, though, the most delicate skulls of all--those of dinosaur embryos--sometimes come to light. In the past 13 years, paleontologists have identified embryonic remains of five kinds of dinosaurs, but only one, a duck-billed dinosaur, had an intact skull. Intact embryos of the long-necked, lumbering sauropods remained unknown--until now.


    2. Embryonic Skulls of Titanosaur Sauropod Dinosaurs, Science Next Article Bookmark and Share

      Abstract: Little is known about the cranial anatomy of the taxonomically diverse and geographically widespread titanosaurs, a paucity that has hindered inferences about the genealogical history and evolutionary development of the latest sauropod dinosaurs. Newly discovered fossil eggs containing embryonic remains from the Late Cretaceous of Argentina provide the first articulated skulls of titanosaur dinosaurs. The nearly complete fetal skulls shed light on the evolution of some of the most notable cranial features of sauropod dinosaurs, including the retraction of the external nares, the forward rotation of the braincase, and the abbreviation of the infraorbital region.


  5. All Creatures Great And Small, Nature Next Article Bookmark and Share

    Excerpt: The living world is governed by laws based on fractal geometry and on the sizes of organisms, some scientists claim. John Whitfield looks at the debate surrounding a biological 'theory of everything'.

    Some people see only the trees, others the whole wood. But when Brian Enquist enters one of his Costa Rican field sites, he senses far deeper patterns. "When I walk into the forest, I have the feeling that, although it's very complex, there are simple rules underlying that complexity," he says.


  6. The Salesman And The Tourist, Nature Next Article Bookmark and Share

    Excerpts: Solutions to optimization problems, such as that faced by the travelling salesman, have many practical applications. Might a related problem offer insight into the behaviour of foraging animals?

    (…) new example from a class of problems known as local optimization problems, and name it the travelling tourist problem. This is the question of what is the best path to be followed by a tourist not constrained to only one visit per city, but constrained - say by his budget - to visit the nearest city.


  7. National: New Drug-Offender Program Draws Unexpected Clients, NYTimes Next Article Bookmark and Share

    Excerpts: California's treatment centers have not been overwhelmed, because far fewer drug offenders than anticipated have pleaded guilty under the new law. But among those who have sought treatment, there have been far more severe addicts than anyone expected, with the added complications of mental illness, homelessness and unemployment. (…)

    The new laws reflect an era of falling crime, budget crunches and the skyrocketing cost of running prisons. (…) changed their laws as the prison population nationwide has quadrupled over the last two decades (…)


  8. Munchausen Syndrome by Proxy: Tall Tales and Real Hurts, Clinician Reviews Next Article Bookmark and Share

    Excerpt: Munchausen syndrome by proxy (MSBP) is a form of child abuse in which a caretaker or parent, usually the mother, systematically fabricates information about a child's health or intentionally makes the child ill -- in order to assume the sick person's role by proxy. Although unexplained persistent or recurrent illnesses or injuries involving a child (and possibly siblings) are potential clues to MSBP, the diagnosis can be elusive. Subjective personal characteristics are not reliable for "profiling" potential perpetrators.

  9. Organs Await Blood Vessels' Go Signal, Science Next Article Bookmark and Share

    Excerpt: Cancer researchers stumbled upon the first evidence that blood vessels do more than ferry food and waste around the body. In 1995, a team reported that endothelial cells, which make up blood vessel walls, produce growth factors.

    The new studies build on that work, showing that by sending another, as-yet-unidentified molecular signal, the embryonic blood vessels direct embryonic tissue not just to grow but to differentiate into complex structures. "The endothelial cells aren't just a bunch of pipes and tubing; they contribute to the formation of the organ


  10. Brain Area Holding 'Sense Of Self' Found, Discovery News/Reuters Next Article Bookmark and Share

    Excerpts: "I think, therefore I am" may be a sound philosophy. But if a certain part of the brain isn't working right, you might not be sure who you are, scientists have found.

    They say the right frontal lobe appears to be key in holding on to a sense of self-from political persuasions to fashion sense. In a study of men and women with damage to that brain area, they found that six out of seven went through profound personality and lifestyle changes.


  11. A Cortical Area Selective for Visual Processing of the Human Body, Science Next Article Bookmark and Share

    Excerpt: Despite extensive evidence for regions of human visual cortex that respond selectively to faces, few studies have considered the cortical representation of the appearance of the rest of the human body. We present a series of functional magnetic resonance imaging (fMRI) studies revealing substantial evidence for a distinct cortical region in humans that responds selectively to images of the human body, as compared with a wide range of control stimuli. This region was found in the lateral occipitotemporal cortex in all subjects tested (...)

    1. Pattern and Object Recognition, Science Next Article Bookmark and Share

      Summary: The early stages of vision are largely a process of deconstructing a scene into component features, such as contours and color, and then reconstructing these into recognizable objects, such as faces. Recent work has indicated that the temporal cortex houses representations of these objects, but the precise nature of these representations (and whether they are localized or distributed) has been elusive. Haxby et al. (p. 2425; see the cover) have looked closely into the patterns of brain activations triggered by different classes of objects. They suggest that these patterns do in fact reveal the distributed representations of objects and that these patterns occupy overlapping territories within the temporal cortex at a subcentimeter scale. Extending earlier work that described an area specialized for responding to human faces, Downing et al. (p. 2470) provide evidence that parts of the human body also are afforded special treatment. In a Perspective, Cohen and Tong compare and contrast these findings about object representation in the human brain.


    2. The Face of Controversy, Science Next Article Bookmark and Share

      Excerpt: Neuroscientists have long puzzled over whether the brain represents and processes information in a modular or a distributed fashion. According to modular theories, the brain is organized into subcomponents, or "modules," each dedicated to processing and representing a particular type of information. This well-structured view of brain organization is intuitively appealing. In contrast, distributed theories argue that any information regardless of type is processed by many different parts of the brain, and that any brain region is likely to represent many classes of information.


    3. Structural Encoding of Human and Schematic Faces: Holistic and Part-Based Processes, J. Cogn. Neurosci. Next Article Bookmark and Share

      Abstract: The range of specificity and the response properties of the extrastriate face area were investigated by comparing the N170 event-related potentials (ERP) component elicited by photographs of natural faces, realistically painted portraits, sketches of faces, schematic faces, and by nonface meaningful and meaningless visual stimuli. (...) Together, these results suggest that early face processing in the human brain is subserved by a multiple-component neural system in which both whole-face configurations and face parts are processed. The relative involvement of the two perceptual processes is probably determined by whether the physiognomic value of the stimuli depends upon holistic configuration, or whether the individual components can be associated with faces even when presented outside the face context.


    4. Distributed and Overlapping Representations of Faces and Objects in Ventral Temporal Cortex, Science Next Article Bookmark and Share

      Excerpts: The functional architecture of the object vision pathway in the human brain was investigated using functional magnetic resonance imaging to measure patterns of response in ventral temporal cortex while subjects viewed faces, cats, five categories of man-made objects, and nonsense pictures. A distinct pattern of response was found for each stimulus category. (…) These results indicate that the representations of faces and objects in ventral temporal cortex are widely distributed and overlapping.


    5. Face Processing Occurs Outside The Fusiform `Face Area' In Autism, Brain Next Article Bookmark and Share

      Abstract: Processing the human face is at the focal point of most social interactions (…) autism, a population that spends limited amounts of time engaged in face-to-face eye contact or social interactions in general. Thus, the study of face processing in autism is not only important because it may be integral to understanding the social deficits of this disorder, but also, because it provides a unique opportunity to study experiential factors related to the functional specialization of normal face processing.

      Excerpt: The face is at the epicentre of human social interactions, and from the beginning of life the normal infant attends vigorously to this stimulus. Changes in blood oxygen level-dependent contrast were measured as subjects performed a face perception task.


  12. The Context of Uncertainty Modulates the Subcortical Response to Predictability, J. Cogn. Neurosci. Next Article Bookmark and Share

    Abstract: Implicit motor learning tasks typically involve comparisons of subject responses during a sequence versus a random condition. In neuroimaging, brain regions that are correlated with a sequence are described, but the temporal relationship of sequence versus nonsequence conditions is often not explored. We present a functional magnetic resonance imaging (fMRI) study describing activation related to sequential predictability in an implicit sensorimotor learning task and the history (context) dependence of these effects. Participants regarded four squares displayed horizontally across a screen and pressed a button when any one of the four targets was illuminated in a particular color. A repeating spatial sequence with varying levels of predictability was embedded within a random color presentation. Both the right dorsolateral prefrontal cortex (R DLPFC) and right caudate displayed a positive correlation to increasing predictability, whereas the left posterior parietal cortex (L PPC) displayed a negative correlation. However, the activation changes within the caudate were significant when transitioning from high predictability to low predictability but not for the reverse case, suggesting a sensitivity not only to predictability but to order effects as well. These results support the hypothesized relationship between basal ganglia and visuomotor sequential learning, but demonstrate the importance of context upon sequence learning.

  13. Amygdala's Inner Workings, The Scientist Next Article Bookmark and Share

    Excerpts: The amygdala, an almond-sized and -shaped brain structure, has long been linked with a person's mental and emotional state. (…) Associated with a range of mental conditions from normalcy to depression to even autism, the amygdala has become the focal point of numerous research projects.

    (…) 6-month-old monkeys, their amygdalas lesioned four months before,6 "will not initiate social approach as young babies normally do to play together.

    (…)damaged amygdala robs the young animals of their ability to interpret the social world around them.


  14. Neuroimaging Of Cognitive Functions In Human Parietal Cortex, Neurobiology Next Article Bookmark and Share

    Abstract: Recent evidence suggests that human parietal cortex may also consist of numerous specialized subregions similar to those reported in neurophysiological studies of non-human primates. However (…) the extension of human brain mapping into higher-order ‘association cortex’ may prove to be a challenge.

    Excerpt: Comparisons of brain maps between humans and other primates show striking differences even in early sensory areas. The most striking finding in a review such as this is the heterogeneity of stimuli and tasks that produce parietal activation. ‘what activates parietal cortex?’,but rather ‘what does not activate parietal cortex?’


  15. Neuronal Circuit Dynamics: The Sociology Of Neurons, Riken BSI News Next Article Bookmark and Share

    Contributing Editor's Note: Understanding the behavior of an isolated neuron is not sufficient as actions of ensembles of neurons can only be understood by studying the context in which their activity occurs. This proposition has lead the author of the following work to apply the concept of "sociology of neurons", that is the examination of patterns in groups of neurons and the phenomena evolving from the interaction of neuronal assemblies. The author argues that though the term "sociology" usually refers to a field of human sciences but many terms and conclusions familiar to sociologists can also be applied to neuronal interactions at the level of the individual brain.

    Excerpt: Human societies change over time, usually in response to and as an adaptation to external factors. Much the same happens in the society of neurons. A major part of neuronal computation can be seen as a process of fitting the external world (as seen by sensory systems) into internal representations and of adapting and refining of this internal system based on experience. The latter process obviously is related to learning and memory.

    Probably the most straightforward observable reflecting the "group dynamics" of neurons are the electrical signals associated with their communication.


  16. Detection of Sounds in the Auditory Stream: Differential Activation to Speech and Nonspeech, J. Cogn. Neurosci. Next Article Bookmark and Share

    Abstract: The detection of speech in an auditory stream is a requisite first step in processing spoken language. In this study, we used event-related fMRI to investigate the neural substrates mediating detection of speech compared with that of nonspeech auditory stimuli. Unlike previous studies addressing this issue, we contrasted speech with nonspeech analogues that were matched along key temporal and spectral dimensions. In an oddball detection task, listeners heard nonsense speech sounds, matched sine wave analogues (complex nonspeech), or single tones (simple nonspeech). Speech stimuli elicited significantly greater activation than both complex and simple nonspeech stimuli in classic receptive language areas, namely the middle temporal gyri bilaterally and in a locus lateralized to the left posterior superior temporal gyrus. In addition, speech activated a small cluster of the right inferior frontal gyrus. The activation of these areas in a simple detection task, which requires neither identification nor linguistic analysis, suggests they play a fundamental role in speech processing.

  17. Internet Stays Small World, TRN News Next Article Bookmark and Share

    Excerpt: The Stanford simulation algorithm took into account the scale-free, or power law nature of the Web; its small-world, or clustering nature; and a trait known as short path links. In scale-free, or power-law networks, a few nodes have many links to other nodes, while many nodes have only a few links. In clustering networks, the relationships among nodes are not randomly distributed, but are grouped. Short path links means there are some very short paths sprinkled throughout the network that may directly link one group to another.

    1. World Wide Web Scaling Exponent From Simon's 1955 Model, Physical Review E Next Article Bookmark and Share

      Abstract: The statistical properties of the World Wide Web have attracted considerable attention recently (…). One characteristic quantity is the number of in-links k that point to a particular web page. Its probability distribution P(k) shows a pronounced power-law

      Excerpt: Recently, a broad range of scaling phenomena has been observed in natural and artificial network structures, motivating new research on the dynamics of complex networks. One interesting example of a complex network is the WWW (…) by sketching a simple stochastic process for adding new nodes (…) closely related to Simon’s original model.


  18. New Network To Eavesdrop On Earth, Discovery News Next Article Bookmark and Share

    Excerpt: "We're just listening to the atmosphere - listening to everything in the atmosphere." Reverberating far below the human range of hearing, the long-wave acoustic signals, called infrasound,result from the rhythmic pressure of energy bouncing off the atmosphere. Large-scale, high-energy phenomena, such as hurricanes, cyclones, landslides, supersonic aircraft, nuclear explosions and meteors all trigger infrasound. (...)

    The team is particularly keen to begin using an array planned for Cape Verde, located off the African coast, a breeding ground for hurricanes. Listening in on brewing storms should give meteorologists a powerful tool for early detection and more accurate forecasting.


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

    Editor's Notes: We want to continue to present ideas and information that were submitted by our readers of Complexity Digest as well as some related links in the open literature Dr. Andrew Ilachinski of the Center for Naval Analyses writes: "I really feel the time is ripe for CAS [Complex Adaptive Systems, Ed.] research to make a stand at this time."

    He has compiled an extensive collection of links on the topic:

    "In particular, I'd like to point your attention to a page I added a few days ago that provides links to a number of on-line papers (from around the web) regarding terrorism and some aspects of systems theory (emergence, agents, group behavior, sociology, etc): http://www.cna.org/isaac/terrorism_and_cas.htm

    While this list is currently a bit short on "technical" material, I suspect this will remedied in the coming weeks and months."


    1. A New Mindset for Warfare, Washingtonpost.com Next Article Bookmark and Share

      According to a Washington Post article sent to us by Carl P. Simon, many concepts from CAS are already implemented in the strategy of "War against Terrorism":

      "Though RDO [Rapid Decisive Operations , Ed.] and other games are mostly focused on wars against nation states in 2010, they provide a rich basis for thinking about American's current adversary. They help us envision the enemy, not as a traditional nation state but as a "complex adaptive system."

    2. America's Response to Terrorism: Reaction at Home and Abroad, Brookings Video Next Article Bookmark and Share

      Since terrorists are organized in networks of cells, one might expect that recent progress in understanding the dynamics of complex "small world" networks might be of potential help. Valdis Krebs sent us a link to his current research area. He writes:

      "Before we fight the enemy we need to 'see' and better understand the enemy... map their networks, figure out their 'patterns' for organizing."

      He has identified three competing goals of a terrorist network:

      1. Establish efficient communication and information flow within and between many cooperating cells by minimizing path length throughout the network.
      2. Limit discovery and monitoring of the network from outsiders by minimizing the number of communication links in the network.
      3. Limit damage when a node is discovered or removed from the network by minimizing the number of direct ties each node has.

    3. In the Next Chapter, Is Technology an Ally?, NYTimes Next Article Bookmark and Share

      "Chaos" is seen as a major component of the future warfare/terrorism in the information dimension:

      "The idea is for the U.S. to have its own, secret group of information warfare terrorists, sanctioned by executive order and scattered around the country in secret "cells."

      They would constitute a kind of "digital Delta Force," the paper says -- an offensive strike force capable of inflicting chaos on an enemy's electronic infrastructure. Such attacks would be cloaked in anonymity for security and other reasons."


    4. Chaos: The Coming Technology War, Yahoo/ www.NewsFactor.com Next Article Bookmark and Share

      The Brookings Project on Terrorism and U.S. Foreign Policy makes their discussions available in video and transcripts.


  20. Links & Snippets Next Article Bookmark and Share

    1. Applicability Of Lyapunov Exponent In EEG Data Analysis, Complexity International Next Article Bookmark and Share

      1. Applicability Of Lyapunov Exponent In EEG Data Analysis, Atin Das, Pritha Das, A. B. Roy, Draft Manuscript, Complexity International (2001)

    2. Conference Announcements Bookmark and Share

      1. Adaptive Agents, Intelligence and Emergent Human Organization: Capturing Complexity Through Agent-Based Modeling, Arthur M. Sackler Colloquium of the National Academy of Sciences, Irving CA, 01/10/5-6
      2. International Symposium on Technology, Economic and Social Applications of Distributed Intelligence (TESADI'01) at the 2001 IEEE International Conference on Systems, Man, and Cybernetics (SMC'01), Tucson, Arizona, USA, 01/10/7-10
      3. Workshop On Interdisciplinary Studies And Complexity, National University of Mexico, 01/10/22-26
      4. 1st Asia-Pacific Conf On Web Intelligence, Maebashi TERRSA, Maebashi City, Japan, 01/10/23-26
      5. The Impact of Complexity in Industry, Univ. Warwick, 01/10/29-30
      6. International Conference on Systems Thinking Globally Concerned, University of Vienna and Vienna University of Technology, 01/11/01-04
      7. Developing A Cyber-Democracy: "Government of the Future", Brookings Inst., Washington, DC. , 01/11/05-09
      8. Digitizing Decisions and Markets, Decision Sciences Institute Annual Meeting, San Francisco, 01/11/17-20
      9. II World Congress of Citizens Networks, Buenos Aires, Argentina, 01/12/05-07
      10. From Worker to Colony: Understanding the Organisation of Insect Societies, Isaac Newton Institute, Cambridge, UK. , 01/12/07-08
      11. Intl Conf on Current Trends In Differential Equations And Dynamical Systems, Kanpur, India, 01/12/15-17
      12. Complex Systems , Modeling Nonlinear Natural and Human Systems, Hawaii International Conference On System Sciences, HICSS-35, Hawaii, 02/01/07-10
      13. 1st Biennial Seminar on Philosophical, Methodological & Epistemological Implications of Complexity Theory, La Habana, Cuba, 02/01/07-11
      14. Topics in Nonlinear Dynamics, Collective Phenomena and Complexity: Dynamical Model Formulation, Analysis and Symmetry, Canberra, Australia, 02/01/21-02/01
      15. AIS'2002: Towards Component-Based Modeling and Simulation, Lisbon, Portugal, 02/04/07-10
      16. World Conference NL 2002 - Networked Learning in a Global Environment: Challenges and Solutions for Virtual Education, Berlin, Germany, 01/05/01-04
      17. 7th International Conference on Music Perception & Cognition - ICMPC7, Sydney, 02/07/17-21
      18. Self-Organisation and Evolution of Social Behaviour, Monte Verità, Switzerland, 02/09/08-13

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