Revealing Order In The Chaos, New Scientist
Excerpts: For example, if more than half the population came to be using strategies that disregard the immediate past, then the future would be certain as soon as the ideas behind these strategies became clear. Such events would be extremely unlikely if players chose their strategies at random, but real people don't. Instead, they tend to use ideas that have done well recently, and end up acting alike. (...) this phenomenon turned 17 per cent of the days into "prediction days", when the markets were at their most readable.
Editor's Note: One might ask what aspects of the original model are reproduced by the coarse grained model. For instance an example in the article shows that after a few steps the coarse grained model just predicts "white" with zero occurrence of "black". That seems like saying "A broken (analog) watch gets the time precisely right twice a day"?"
One of the researchers mentioned in the New Scientist article (NigelGoldenfeld, UIUC) had the following comment:
"That particular example(146/128) has trivial short scale dynamics, but others in the Physical Review Letter mentioned by New Scientist do not (e.g. 105/150 infigure 1 (c), (d) of our PRL). The fact that the short scale dynamics is trivial in the 146/128 example is not a demerit of the calculation. It just happens to be the correct (and uninteresting) short scale coarse-grained dynamics in that particular case. Thus I don't agree it is analogous to a broken watch."
Todd Rowland of the Wolfram science group comments:
"Sometimes the coarse graining can enhance the prediction of say rule 110.
For instance, you may be able to find out that at position {0,10^6} the next four cells are either {0,1,1,0} or {1,1,1,1}. But that still doesn't tell you what the next cell is. In practice, coarse graining is rarely this specific, so out of the 16 possible sequences here roughly half
would be represented.
One cannot just expect there to be a coarse graining of a given size for a
given rule. For each rule, going out to size 5, there are 2^32 cases to
consider. Very few were found."
Discussion on this important topic can be continued on our forum or on that of Wolfram Science .
The Hegemony of the Physical Sciences: An Exploration in Complexity Thinking, Futures
Abstract: Traditionally the natural sciences, particularly physics, have been regarded as the Gatekeepers of Truth. As such the legitimacy of others forms of knowledge have been called into question, particularly those methods that characterise the ‘softer' sciences, and even the arts. This paper begins with an extended discussion concerning the main features of a complex system, and the nature of the boundaries that emerge within such systems. Subsequent to this discussion, and by assuming that the Universe at some level can be well-described as a complex system, the paper explores the notion of ontology, or existence, from a complex systems perspective. It is argued that none of the traditional objects of science, or any objects from any discipline, formal or not, can be said to be real in any absolute sense although a substantial realism may be temporarily associated with them. The limitations of the natural sciences is discussed as well as the deep connection between the ‘hard' and the ‘soft' sciences. As a result of this complex systems analysis, an evolutionary philosophy referred to as quasi-‘critical pluralism' is outlined, which is more sensitive to the demands of complexity than contemporary reductionistic approaches.
Warning From the Markets, NY Times
Excerpts: Enter South Korea. On Monday, its central bank reported that it intended to diversify into other currencies and away from dollar-based assets. And why not? It holds about $69 billion in United States Treasury securities, or 4 percent of the total foreign Treasury holdings. (...), all hell broke loose, with currency traders selling dollars for fear that the central banks of Japan and China, which hold immense dollar reserves - a combined $900 billion, or 46 percent of foreign Treasury holdings - might follow suit.
Honey, I Shrunk the Dollar, NY Times
Excerpts: We are importing too much oil, so the dollar's strength is being sapped as oil prices continue to rise. And we are importing too much capital, because we are saving too little and spending too much, as both a society and a government. (...)
The U.S. pulled in 80 percent of total world savings last year [largely to finance our consumption]." That's a big reason why some "43 percent of all U.S. Treasury bills, notes and bonds are now held by foreigners," Mr. Hormats said.
Private-Account Concept Grew From Obscure Roots, Washington Post
Excerpts: Twenty-five years ago, Peter J. Ferrara was a Harvard Law School student with what he called "the craziest idea in the world." In a paper he wrote before graduating, he suggested converting the government-run Social Security program into a web of private investments.
The paper caught the eye of Edward H. Crane, (...) who had recently started the Cato Institute, which has a stated mission of encouraging "limited government." To him, Ferrara's idea wasn't crazy at all, but a way to challenge Washington's largest and most revered social program.
The Human Science of Simulation: a Robust Hermeneutics for Artificial Societies, JASSS
Abstract: The inability to verify simulation behavior limits the veracity of our claims to the theories and assumptions underlying the design of artificial societies. Those theories in turn suffer from their own cultural preconceptions, such as the location of agency at the cognitive level. The following essay highlights these concerns and points to a solution. I contend that artificial societies are subjective exercises in imagination, our description of their dynamics on par with the "thick descriptions" of cultural anthropology. Hermeneutics, the interpretive methodology employed in that discipline, can assist designers to negotiate the interstices between micro- and macro-level perspectives on agency. The resulting interpolation of theories reduces the impact of observer bias, giving rise to robust descriptions of agent behavior. I address the computation of hermeneutics through its resonance with the philosophy of William Wimsatt, and treat Laitin's work in identity construction, through model complication and "docking", as an example of robust hermeneutics.
The Ghost in the Model (and Other Effects of Floating Point Arithmetic), JASSS
Abstract: This paper will explore the effects of errors in floating point arithmetic in two published agent-based models: the first a model of land use change (Polhill et al. 2001; Gotts et al. 2003), the second a model of the stock market (LeBaron et al. 1999). The first example demonstrates how branching statements with floating point operands of comparison operators create a high degree of nonlinearity, leading in this case to the creation of 'ghost' agents -- visible to some parts of the program but not to others. A potential solution to this problem is proposed. The second example shows how mathematical descriptions of models in the literature are insufficient to enable exact replication of work since mathematically equivalent implementations in terms of real number arithmetic are not equivalent in terms of floating point arithmetic.
'The Road to Reality': A Really Long History of Time, NY T imes
Excerpts: So why could the cat not be both dead and alive? More to the point, why can't all of us enjoy the advantage of being in more than one place at the same time?
Among the usual answers, the most exotic requires the existence of parallel universes, in which every possible outcome of a situation can unfold. Penrose imagines something more mundane: that gravity (the curving of space-time in relativity theory) might somehow squeeze down all the quantum possibilities into a single humdrum reality.
Interviews:'A Complete Guide to the Laws of the Universe', NPR TOTN
Excerpts: Author and mathematician, Sir Roger Penrose, talks about his latest book The Road to Reality. The 1,094-page tome examines the mathematical theory that underlies our present understanding of the physical universe.
Dark Matter Need Not Apply, Science Now
Excerpts: There all along. In the solar neighborhood, clouds of cold, dark gas (yellow and red) appear to surround clouds of molecular hydrogen (blue). CREDIT: Grenier et al., Science |
The Milky Way galaxy may be held together by plain old ordinary matter after all. New research indicates that the space between stars contains twice as much cold gas as previously thought. If so, the gas might provide enough gravity to keep the galaxy from flying apart, eliminating the need for mysterious dark matter. The matter strewn through interstellar space consists mostly of hydrogen. Nearly all of this comes in two forms: Relatively warm clouds of individual hydrogen atoms and colder clouds of diatomic molecules.
Unveiling Extensive Clouds of Dark Gas in the Solar Neighborhood, Science
Excerpts: From the comparison of interstellar gas tracers in the solar neighborhood (...), we unveil vast clouds of cold dust and dark gas, invisible (...) [with conventional methods, Ed.] but detected in {gamma} rays. They surround all the nearby (...) clouds and bridge the dense cores to broader atomic clouds, thus providing a key link in the evolution of interstellar clouds. The relation between the masses in the molecular, dark, and atomic phases in the local clouds implies a dark gas mass in the Milky Way comparable to the molecular one.
Ghostly Galaxy: Massive, Dark Cloud Intrigues Scientists, Science News
Excerpts: It looks like an empty patch of space, but astronomers say it holds a galaxy that contains no stars. (...) first member of a population of galaxies that theorists have proposed but observers had never seen.(...)
Follow-up observations with visible-light telescopes showed that one of these clouds was associated with a faintly glowing galaxy. However, long exposures (...) offered up a surprise: The second cloud had no partner glowing galaxy. (...)
"It's puzzling how this ball of hydrogen hasn't got any stars in it."
Editor's Note: This story reminds old science fiction fans of a quote from Arthur C. Clarke's "2001: A Space Odyssey":
"My God, it's full of stars!"
Astronomers Find Star-Less Galaxy, BBC News
Excerpts: The invisible galaxy could only be "seen" using radio waves |
Astronomers have discovered an object that appears to be an invisible galaxy made almost entirely of dark matter. (...) A dark galaxy is an area in the Universe containing a large amount of mass that rotates like a galaxy, but contains no stars.
It was found 50 million light-years away using radio telescopes in England and Puerto Rico.
Very little is known about "dark matter", even though there is much more of it in the cosmos than "normal", or baryonic, matter, which constitutes the visible material from which stars and planets are built.
Frozen Sea or Lava Field?, Science Now
Excerpts: Ice or lava? Experts debate the nature of this region near the Martian equator. CREDIT: G.Neukum/ESA/DLR/FU Berlin |
New pictures from Mars ignite transatlantic debate Scientists agree that both water and lava have repeatedly gushed from the ground in a region near the Martian equator known as Elysium (...). Apparently, rising magma intersected subterranean water and drove it through the cracks to the surface, carrying with it any debris of life past or present. (...). The water pooled to a depth of 45 meters over an area about 850 kilometers across. Once its surface froze, Murray says, the water moved again, breaking the ice into floes now locked into a frozen sea (...).
"How Science Survived"--Medieval Manuscripts as Fossils, Science
Excerpts: Ancient texts survived from Antiquity through the Middle Ages as manuscript copies produced by monks and professional scribes until the invention of the printing press in the 15th century A.D. (...) But how can we calculate the percentages of texts that have survived or gone extinct and consequently the amount of knowledge that we have inherited from Antiquity and the Middle Ages? (...) examined them as "fossils" of early textual "populations." Applying models used by population biologists, Cisne calculated the size and age distributions of these scientific texts.
Manuscripts 'Treated As Fossils', BBC News
Excerpts: An ancient text can tell a historian fascinating stories about the people and the culture that created it. |
By applying models usually used for explaining population dynamics in the animal kingdom, he says he can estimate the size and durability of an extinct "population" of manuscripts.
In very simplistic terms, he would take some copies of a manuscript and work out their age range (...).
From that information, he would determine how many manuscripts were probably around at any one time, what their rate of "population growth" was and how often they were destroyed.
(...) how likely it was that it would be burned in a fire or eaten by rats (...).
Ancient Alexandria Emerges, By Land and By Sea, Science
Excerpts: Excavators are finding surprisingly late signs of intellectual life in the ancient capital of Hellenistic Egypt and discovering that geology played a dramatic role in the city's fall.
"The buildings Professor Majcherek has found demonstrate the existence of a think tank" long after the fall of Rome. "It is surprising that it seems to function in a modern way,"(...).
(...) the subsidence was brought on by a lethal combination of earthquakes, tsunamis, and the slow but relentless sinking of heavy foundations into unstable soil, which defeated even savvy Roman engineers.
Battle Erupts Over the 'Hobbit' Bones, Science
Excerpts: Jacob has announced that, in his view, the skeleton is that of a modern human pygmy with microcephaly. "There are [living] pygmies near there--near Liang Bua," he notes. Last week, three paleoanthropologists, two of whom had publicly challenged Morwood and his colleagues' analysis--Maciej Henneberg of the University of Adelaide, Alan Thorne of Australian National University in Canberra, and Robert Eckhardt of Pennsylvania State University--announced, after examining the bones with an Australian camera crew looking on, that they agree with Jacob. Morwood calls this interpretation "mind-boggling."
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Excerpts:
Inferred intent. Mirror neurons can tell whether a hand is reaching for a drink (top) or cleaning up (bottom). CREDIT: Iacoboni et al., PLoS Biology (March 2005) |
(...) tested a hunch that mirror neurons detect intentions as well as movements. (...). In one clip, volunteers saw a setup for a small tea party-(...). In another, they saw the messy aftermath, complete with cookie crumbs and a used napkin. At the end of both clips a hand reached in from offscreen and grabbed the teacup. The grasping movement was identical in each clip, but the background scenery suggested different intentions: grasping the cup to drink tea in the first clip, versus cleaning up in the second.
He Thinks He's People, Science Now
Excerpts: Complex. Hyenas' personalities can be described in the same terms as those of humans. CREDIT: Christine Drea |
New research shows that animals do indeed have complex personalities By querying dog owners on their pets' traits, Samuel Gosling of the University of Texas, Austin, created a similar test based on four traits: energy, affiliativeness, emotional reactivity, and competence. His team also made a test for hyenas based on assertiveness, excitability, human-directed agreeableness, sociability, and curiosity. Gosling's results indicate that although each species may have its own unique characteristics, fundamental traits are so universal that it's possible to describe humans and animals through terminology designed for either. (...)
"Personality ratings are as predictive in dogs as in humans," (...).
Bird IQ Test Takes Flight, ScienceDaily
Excerpts: How smart is your parakeet or that crow in the back yard? Ask Dr. Louis Lefebvre, inventor of the world's only comprehensive avian IQ index. His intelligence index is not only separating the featherweights from the big bird brains, it's also providing clues about why some birds make great immigrants, as well as insight into the parallel evolution of primate and bird brains. (...) says that the IQ index meticulously avoids the factor that gets feathers ruffled with human IQ tests: cultural bias. (...) The crow and falcon families are at the top of the class, followed by hawks, woodpeckers and herons. (...)
- Source: Bird IQ Test Takes Flight, ScienceDaily & Natural Sciences And Engineering Research Council, 2005/02/24
- Contributed by Atin Das - dasatin
yahoo.co.in
Is More Choice Always Desirable? Evidence And Arguments From Leks, Food Selection, Biol. Rev.
Excerpt: Recent studies on humans show that too much choice can make subjects less likely to choose any item. I consider general adaptive and non-adaptive explanations of why such choice aversion, or its converse, might occur in animals. There are three questions: is more choice always preferred, does it ever lead to less consumption (or a lower probability of consumption), and may it result in worse items being selected? A preference for choice is one of the main explanations for lek formation and I draw attention to previously unrecognised parallels with models of human shopping behaviour. (...)
Making Synapses: A Balancing Act, Science
Excerpts: Whatever the precise mechanism, their double duty as inducers of either excitatory or inhibitory synapses places beta-neurexins and neuroligins center stage in the control of excitation/inhibition (E/I) balance, which is critical for neuronal function. Indeed, neurons deficient in neuroligins displayed an abnormal E/I balance, with greater loss of inhibition than of excitation. Genetic mutations (...) have been implicated in human mental retardation and autism. Could these illnesses be due to an E/I imbalance resulting from aberrant formation of excitatory versus inhibitory synapses?
Soccer Link To Motor Neuron Disease, New Scientist
Excerpts: A rigorous study in Italy has confirmed claims that professional soccer players have a higher than normal risk of developing a type of motor neuron disease, also known as amyotrophic lateral sclerosis. The reason remains a mystery. ALS involves the death of motor neurons, the nerve cells responsible for voluntary movement, and eventually leads to paralysis and death. Adriano Chi?'s team at the University of Turin surveyed the medical records of 7000 professional footballers who played in Italy's first or second division between 1970 and 2001.
Anticipating Epileptic Seizures: From Mathematics to Clinical Applications, Comptes Rendus Biologies
Abstract: The study of dynamical changes in the neural activity preceding an epileptic seizure allows the characterization of a preictal state several minutes prior to seizure onset. This opens new perspectives for studying the mechanisms of ictogenesis as well as for possible therapeutic interventions that represent a major breakthrough. In this review we present and discuss the results from our group in this domain using nonlinear analysis of brain signals, as well as its limitation and open questions.
A Pathogen Attacks While Keeping Up Defense, Science
Excerpts: The filamentous needle, composed of a single protein, projects beyond the bacterial surface. For bacterial effector proteins to be translocated into host cells, the tip of the needle must make contact with the eukaryotic host cell membrane.
(...) To survive host inflammatory processes such as increased production of antibacterial peptides, Shigella is equipped with a lipolysaccharide structure in its outer membrane (...), Shigella has developed an ingenious way of ensuring that its injectisome needle remains operational without compromising the ability of the O-antigen polymer to protect against host inflammatory mediators
DNA Tells Story of Heart Drug Failure, Science
Excerpts: Physicians have long known that a drug commonly prescribed for heart failure helps only about half the patients who receive it. Now, researchers are explaining that puzzle using genetics. A study reported at the AAAS meeting found that a difference of a single amino acid within the drug's protein target may determine whether the drug works. The discovery could ultimately help physicians better juggle drugs in heart failure patients and possibly in those with high blood pressure as well.
Breathing Life into Dead Bones, Science Now
Excerpts: Lifeless. Radiographic images of bone implants in a mouse show that healthy grafts (a and b) grow much better than implants from cadavers (c and d). CREDIT: Edward Schwarz |
Gene therapy can bring dead bone back to life, researchers now say. (...) Doctors treat severe bone damage and cancer by replacing the affected bone with sections of bone from a cadaver. But this dead bone accumulates microfractures and breaks over time, (...). The team then incorporated these genes into a freeze-dried virus and painted it on dead bone before implanting it. The technique worked. The virus-coated bone tricked the body into infusing it with blood vessels and allowing it to regulate calcium release.
Protein in Mice May Fight Bone Loss, NPR Day to Day
Excerpts: Researchers in Michigan have observed a protein in mice that blocks the production of fat and creates bigger and stronger bones. The discovery could lead to new treatments for osteoporosis.
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Excerpts:
Picky eaters. The sounds termites make while munching guide their comrades to appropriate food sources. CREDIT: Clemson University/USDA |
Chomping their way through the wood they feed on, termites tend to be loud eaters. But new research suggests that this noise may serve a practical purpose: It may help the insects decide what to eat and where to nest. Termites, which are blind, use vibrations as a form of communication. (...) Termites can sense these vibrations via organs on their legs and at the base of their antennae. But no one had examined whether the loud crunching at mealtime might have significance beyond simply digesting wood.
Playback Of Colony Sound Alters The Breeding Schedule And Clutch Size In Zebra Finch Colonies, Proc. Biol. Sc.
Excerpt: The hypothesis that social stimulation, derived from the presence and activities of conspecifics, can hasten and synchronize breeding in colonies of birds was tested. A modified playback/recorder system was used to continuously exaggerate the amount of colony sound available to zebra finches throughout their courtship period. Males that heard 'sound supplements' generated from their own colony sang more than males in control colonies that did not receive playback; males that heard samples from a different colony, sang at an intermediate level. Females that were exposed to the vocalizations of their mate and playback from a colony other than their own, (...).
Flawed Assumptions Threaten U.S. Fish Populations, Science Now
Excerpts: But, according to Steven Berkeley, (...)., these big fish-which tend to be older-are crucial to sustaining fish populations. Berkeley and colleagues came to this conclusion by comparing the survival rates of rockfish larvae birthed by old and young fish. "The results were astounding," he says. Old fish equip their young with a larger oil globule to help prevent starvation. "So the larvae from older fish were twice as likely to survive a period of starvation as larvae from young fish. They also grew thrice as much in size."
Forging a Global Network to Watch the Planet, Science
Excerpts: The dream of creating a global earth-monitoring network came a step closer to reality last week. (...) launch a 10-year program to turn gauges, sensors, buoys, weather stations, and satellites that monitor Earth's surface, atmosphere, and oceans into a unified whole. The Global Earth Observation System of Systems (GEOSS), as it's called, is expected to evolve slowly from national systems into a comprehensive, coordinated, and sustained set of observations for the benefit of everyone, including developing countries. (...) up to the next level: a total earth-observing system(...).
Reviving Iraq's Wetlands, Science
Excerpts: The fight is on to save Mesopotamia's drained marshes. But it's not easy finding a realistic and salable plan--or gathering data in a dangerous environment.
(...) in an unprecedented ecological and human disaster, some 90% of the famed Iraqi wetlands were destroyed by 2000. (...)
In one generation, some 20,000 square kilometers of marsh shrank to a tenth of that size, as did a population that once numbered a half-million. (...)
Left behind were vast salt flats laced with insecticides and landmines.
Ocean Warming Model Again Points to a Human Touch, Science
Excerpts: Climate researchers concerned that their model might have overlooked something have retested the links between the burning of fossil fuels, greenhouse warming, and the warming of the deep oceans. A closer look at the evidence, they say, has bolstered their earlier conclusion: Humans are indeed warming the world, right down to thousands of meters deep in the oceans.
The high statistical significance of the new study reported at the AAAS meeting "should wipe out much of the uncertainty about the reality of global warming," (...).
Anti-Wind Farm Report Dismissed, BBC News
Excerpts: The UK has one of the biggest resources of wind in Europe |
"There are several differences between the UK and Germany. Firstly, our wind resource is better - it's stronger and more consistent. "Secondly we are using different and better policy instruments. It is much more competitive in the UK. Elsewhere you get a guaranteed price, (...).
"The third difference is the amount of wind power used in Germany, in some parts it is 20%.
"Everyone accepts that when you get to that level it is much more of a problem because of the fact that wind is intermittent.
Corporate Culture, Absorptive Capacity And IT Success, Info. & Org.
Excerpts: This study examines absorptive capacity's role in IT implementation success. Absorptive capacity is the organization's ability to recognize the value of new information, assimilate it, and apply it to commercial ends (...). Based on previous research, this study proposes a measure of absorptive capacity that includes managerial IT knowledge and communication channels and tests its relationship to the application of new technology in the form of expert systems implementation. (...) This study examines the type of corporate culture that influences absorptive capacity. The results provide support for absorptive capacity's proposed dimensions and its antecedent of corporate culture (...).
- Source: Corporate Culture, Absorptive Capacity And IT Success, S. J. Harrington - susan.harrington
gcsu.edu, T. Guimaraes - tguimaraes
tntech.edu, DOI: 10.1016/j.infoandorg.2004.10.002, Information and Organization, Jan. 2005, Online 2004/12/02 - Contributed by Pritha Das - prithadas01
yahoo.com
Hide-and-seek on complex networks, Europhys. Lett.
Signaling pathways and networks determine the ability to communicate in systems ranging from living cells to human society. We investigate how the network structure constrains communication in social, man-made and biological networks. We find that human networks of governance and collaboration have predictable communication on tête-à-tête level, reflecting well-defined pathways. In contrast, communication pathways in the Internet are more distributed. For molecular networks, the communication ability in the single-celled yeast resembles the one of human networks, whereas the more complicated Drosophila is closer to the Internet. For all investigated networks, the global communication is worse than for their random counterparts, reflecting the fact that long-distance communication is disfavored.
- Source: Hide-and-seek on complex networks, K. Sneppen, A. Trusina1, and M. Rosvall, DOI: DOI: 10.1209/epl/i2004-10422-0, Europhys. Lett., 69 (5), pp. 853-859 (2005), published online 11 February 2005
- Contributed by Hugh Trenchard - htrenchard
shaw.ca
Mind Control, Wired
Excerpts:
Nagle, a 25-year-old quadriplegic, is the first human fitted with the BrainGate Neural Interface. He can whip you at Pong without lifting a finger.
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A bundle of wires as thick as a coaxial cable runs from a connector in Nagle's scalp to a refrigerator-sized cart of electronic gear. Inside his brain, a tiny array of microelectrodes picks up the cacophony of his neural activity; processors recognize the patterns associated with arm motions and translate them into signals that control the Pong paddle, draw with a cursor, (...).
Nagle, 25, is the first patient in a controversial clinical trial that seeks to prove brain-computer interfaces can return function to people paralyzed by injury or disease.
- Source: Mind Control, Richard MartinPage, Wired, 13.03, 05/03
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Excerpts: First, doctors scrutinized images of his brain as it malfunctioned. Then, guided by these scans, they wired electrodes to eight "hot spots" deep in his brain, and implanted under his skull a pacemaker-like device (...). (...), it houses a microprocessor programmed to detect the brain-wave pattern that precedes a seizure. Whenever this pattern arises, it immediately zaps the trigger sites with tiny jolts of electricity. The goal is to override his abnormal synapses and restore normal brain activity before Kohn is even aware that a seizure is brewing.
Sad, Lonely? For a Good Time, Call Vivienne*, NY Times
Excerpts:
Colin Beere for The New York Times
Eberhard Schöneburg, the chief executive of the software maker Artificial Life Inc. of Hong Kong, holds an image of Vivienne. She can handle English, Chinese, Japanese, Korean, German, Spanish and Italian.
|
If you marry her in a virtual ceremony, you even end up with a virtual mother-in-law who really does call you in the middle of the night on your cellphone to ask where you are and whether you have been treating her daughter right.
She may sound like a mixed blessing, decidedly high maintenance and perhaps the last resort of losers. (...)
(...) services that companies are developing to take advantage of the much faster data transmission rates made possible by 3G technology.
Toward The Neurocomputer: Image Processing And Pattern Recognition With Neuronal Cultures, IEEE Tran. Biomed. Engg.
Excerpt: Information processing in the nervous system is based on parallel computation, adaptation and learning. These features cannot be easily implemented on conventional silicon devices. In order to obtain a better insight of how neurons process information, we have explored the possibility of using biological neurons as parallel and adaptable computing elements for image processing and pattern recognition. (...) Therefore, neurocomputers, (i.e., hybrid devices containing man-made elements and natural neurons) seem feasible and may become a new generation of computing devices, to be developed by a synergy of Neuroscience and Material Science.
For Simpler Robots, a Step Forward, NY Times
Excerpts:
ON THE MOVE Robots, from left, from Delft University of Technology, M.I.T. and Cornell, were unveiled at the national meeting of the American Association for the Advancement of Science.
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Modern versions of the machines, called passive-dynamic walkers, have been built for decades and have long been thought useful models of human locomotion, Dr. Ruina said. But in the past the machines were not able to walk on level ground.
Now the researchers from the three universities have shown that the classic passive-dynamic walking machines need not depend on gravitational power. Instead, they have put small motors on their robots and shown that they can walk on level ground.
'Toddler' Takes a Robotic Step Forward, NPR Day to Day
Excerpts: Scientists have developed a robot that "learns" to walk with each step, allowing it to mimic human movement. The robot -- called "Toddler" -- is featured in this week's issue of the journal Science.
The Road to Quantum Computing, Science
Excerpts: The qubits in question consist of a superconducting Josephson tunnel junction through which a constant current is passed. (...)
The qubits described above are known as phase qubits. Other types of superconducting qubits have also been reported; charge qubits are defined by the presence or absence of a single pair of electrons, whereas in flux qubits, a persistent circulating current runs clockwise or anticlockwise. With all three types, controlled, driven transitions of individual qubits have been demonstrated. However, further improvements are needed.
Building Autos With the Same DNA, NY Times
Excerpts: Is the 9-7X the first sport utility vehicle from Saab, or is it a Chevy TrailBlazer dressed up to look Swedish?
The 9-7X, (...), will be roughly the same size and shape as a TrailBlazer, and for that matter, a GMC Envoy, Buick Rainier and Isuzu Ascender. (...) All five S.U.V.'s share a pickup truck frame, the same engines, a similar sheet-metal design and many of the same parts, but the Saab has a base price of $38,270, about $11,000 higher than the TrailBlazer.
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Excerpts:
Saving fuel |
THE coming of steam sent the world's great sailing fleets into decline. (...) So it would be a strange twist of fate if the age of sail was resurrected by what amounts to a child's toy. For several weeks last summer, a team of German engineers sailed back and forth across the Baltic Sea playing with a large inflatable kite. The engineers, (...), were testing the potential of high-tech kites to pull a ship across the ocean by hitching a ride on winds high above the waves.
The Tipping Points, NY Times
Excerpts: (...) what's so interesting about the Middle East today is that we're actually witnessing three tipping points at once.
Thanks to eight million Iraqis defying "you vote, you die" terrorist threats, Iraq has been reframed (...).
Lebanon went from a country where few dared whisper "When will Syria leave?" to a country where nearly everyone was shouting it, (...).
The issue for the Palestinians is no longer about how they resist the Israeli occupation in Gaza, but whether they build a decent mini-state there (...).
Bush Says Russia Must Make Good on Democracy, NY Times
Excerpts: President Bush warned Russia on Monday that it "must renew a commitment to democracy and the rule of law," (...).
"We recognize that reform will not happen overnight," Mr. Bush said. "We must always remind Russia, however, that our alliance stands for a free press, a vital opposition, the sharing of power and the rule of law - and the United States and all European countries should place democratic reform at the heart of their dialogue with Russia."
Editor's Note: It would be interesting to have an independent assessment of all countries with regards to these goals of rule of law and democracy and see how this score distribution changes over time.
Wag-the-Dog Protection, NY Times
Excerpts: The political landscape today reminds me of the spring of 2002, after the big revelations of corporate fraud. Then, as now, the administration was on the defensive, and Democrats expected to do well in midterm elections.
Then, suddenly, it was all Iraq, all the time, and Harken Energy and Halliburton vanished from the headlines.
But a president can always change the subject to national security if he wants to - (...) willing to play the terrorism card when he is losing the debate on other issues.
A Shell Game in the Arms Race, NY Times
Excerpts: Sinopec, China's state-owned oil and gas giant, has subsidiaries that the State Department has hit with sanctions four times since 1997 for selling to Iran materials that could be used to make chemical weapons. However, because these subsidiaries do little or no business with the United States, the punishments - curbs on trade with America - were purely symbolic.
Sinopec itself has extensive ties with American companies, dealings Washington could block. Yet we refuse to punish it for anything its offshoots do. The reason is simple:
Complex Challenges: Global Terroist Networks
U.S.-Russia Pact Aimed at Nuclear Terrorism, Washington Post
Excerpts: (...) a package of measures today to counter the threat of nuclear terrorism, a threat highlighted in a recent U.S. intelligence report warning that Russian nuclear material could still fall into terrorist hands, (...).
(...), U.S. and Russian officials would accelerate long-delayed security upgrades at Russia's many poorly protected nuclear facilities, jointly develop emergency responses to a nuclear or radiological terrorist attack, and establish a program to replace highly enriched uranium in research reactors around the world to prevent it from being used for weapons, the U.S. officials said.
The Next 9/11 Could Happen at Sea, NY Times
Excerpts: Just as terrorists learned to be pilots for 9/11, terrorists may now be learning to be pirates. Purposely grounding a crude carrier hauling two million barrels of oil at a place like Batu Berhanti, where the strait is little more than a mile wide, would close the waterway indefinitely. The delay in oil supplies to China, Japan and South Korea could devastate their economies, setting off a global economic crisis.
Such concerns are why Potengal Mukundan, (...), said he was encouraged that there have been no attacks since the tsunami.
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Excerpts: For nearly two years, Ahmed Omar Abu Ali was imprisoned in Saudi Arabia without charge, allegedly at the behest of the United States. The U.S. government has not clarified what role it played in the detention of this U.S. citizen. Indeed, in seeking to dismiss a civil case brought by Mr. Abu Ali's parents, the government relied not only on secret evidence (...). (...) this week the Justice Department revealed its case against Mr. Abu Ali, who has at last been transferred to U.S. custody.
The Case of Ahmed Omar Abu Ali, NY Times
Excerpts: Mr. Abu Ali, 23, was arrested by Saudi officials in a crackdown after terrorist bombings in Riyadh in 2003. But the Saudis have never shown much interest in actually charging him with a crime. His parents claimed that he was being held at the behest of the United States, and sued in court to get him returned to this country. A federal judge has said that "there has been at least some circumstantial evidence that Abu Ali has been tortured during interrogations with the knowledge of the United States."
It's Called Torture, NY Times
Excerpts: Mr. Arar was not charged with anything, and yet he was deprived not only of his liberty, but of all legal and human rights. He was handed over in shackles to the Syrian government and, to no one's surprise, promptly brutalized. A year later he emerged, and still no charges were lodged against him. His torturers said they were unable to elicit any link between Mr. Arar and terrorism. (...)
Mr. Arar's is the case we know about. How many other individuals have disappeared (...)?
Follow the Port Security Money, NY Times
Excerpts: Defending the United States from terrorist attack requires an enormous budget, skillfully spent. So why is the federal government spending money to protect Martha's Vineyard while underfinancing New York and Los Angeles?
A new audit of spending on port security - (...)- reveals a disturbing trifecta: far too little money appropriated; much of the appropriated money not spent; and much of the money that was spent going for the wrong things. This is all part of a larger problem of misplaced priorities in the homeland security budget.
Links & Snippets
Other Publications
Special Announcement: My collaborators, Allen Lee and Andy Jones, and I would greatly appreciate
it if you could mention our Group Experimentation Environments in Complexity
Digest. We are encouraging people to participate in an ongoing, on-line
group experiment on resource foraging. The experiment is rather educational
and engrossing. Your goal in a four-minute experiment is to pick up as many
resources as you can by moving your icon with the arrow keys. You compete
against other humans when they are available or Artificial Intelligence Bots
(programmed by Michael Roberts) when no other humans are currently on-line.
We have been beta-testing the environment locally at Indiana University for
awhile, and now feel ready to announce it to the broader community, at least
the broader ACADEMIC community at this point. If you find any bugs or have
suggestions for improvements, please email Andy Jones
or Allen Lee , and CC me (rgoldsto@indiana.edu). The
web site for the experiment is:
http://groups.psych.indiana.edu/
Thank you for your foraging efforts,
Rob
___________________________________________________
Dr. Robert Goldstone, Program in Cognitive Science, Indiana University
rgoldsto@indiana.edu
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- Einstein on Your Desktop, 05/02/20, Science Now, Physicists invite the public to search for gravitational waves
- Companies Fight to Ensure Coverage for Erectile Drugs, Robert Pear, 05/02/22, NYTimes, The issue of whether Medicare's new prescription drug benefit should cover such treatments is raising questions of ethics, economics, politics and health policy.
- Channeling Chaos by Building Barriers, 05/02/23, Phys. Rev. Lett. 94, 074101
- Brave New World. Get Ready For Robots That Can Think, Jodie Sinnema, 05/02/23,
CREDIT: Ed Kaiser, The Journal Robo Soccer At U Of A: Michael Bowling, a University of Alberta computing science professor, plays soccer with Timmy the robot. Bowling is working on weaning Timmy off his joystick and giving him camera eyes so he can play on his own. |
The Edmonton Journal, Artificial intelligence bringing that day closer, professor says - Genome of Deadly Amoeba Sequenced, 05/02/24, Science Now, Genes stolen from bacteria may help the parasite thrive in the gut
- Report Faults Bush Initiative on Education, Sam Dillon, 05/02/24, NYTimes, A bipartisan panel of lawmakers called No Child Left Behind a convoluted and unconstitutional initiative that has usurped local control of public schools.
- Onset Of Traffic Congestion In Complex Networks, Liang Zhao, Ying-Cheng Lai, Kwangho Park, Nong Ye, 05/02/24, Phys. Rev. E 71, 026125
- Designing Pattern-Recognition Surfaces for Selective Adsorption of Copolymer Sequences Using Lattice Monte Carlo Simulation, Arthi Jayaraman, Carol K. Hall, Jan Genzer, 05/02/24, Phys. Rev. Lett. 94, 078103
- 10 Voters on Panel Backing Pain Pills Had Industry Ties, Gardiner Harris, Alex Berenson, 05/02/25, NYTimes, The 10 government drug advisers with company ties voted 9 to 1 to keep Bextra on the market and 9 to 1 for Vioxx's return.
- For a Start-Up, Visions of Profit in Podcasting, John Markoff, 05/02/25, NYTimes, The primarily amateur Internet audio medium known as podcasting will take a small, hopeful step on Friday toward becoming the commercial Web's next big thing.
- So Much Rain, and Southern California Has Never Seen Such Greens, Verlyn Klinkenborg, 05/02/25, NYTimes, In California, no one remembers this much rain, and no one remembers this much green.
- The Selective Cause of an Ancient Adaptation, Guoping Zhu, G. Brian Golding, Antony M. Dean, 05/02/25, Science : 1279-1282.
- How Science Survived: Medieval Manuscripts' "Demography" and Classic Texts' Extinction, John L. Cisne, 05/02/25, Science : 1305-1307.
- Control of Excitatory and Inhibitory Synapse Formation by Neuroligins, Ben Chih, Holly Engelman, Peter Scheiffele, 05/02/25, Science : 1324-1328.
- Shrinking At Sea: Harvesting Drives Evolution Toward Smaller Fishes, 05/02/26, Science News, In response to fishing, numerous fish species have evolved to be smaller and to grow more slowly, creating populations of fish that are poor at reproducing and inefficient at bulking up.
- Electronic Soup: Molecules In Acid Broth Act As Circuit Parts, 05/02/26, Science News, An electronically promising molecule functions well in acid as a tiny amplifier, underscoring the importance of controlling molecules' electrochemical environments to achieve predictable performance.
- A Quantum Fluid Pipes Up, 05/02/26, Science News, After 40 years of trying, physicists have heard a quantum-mechanical whistle emanating from two reservoirs of oscillating liquid helium separated by a perforated membrane.
- Poisonous Partnership, 05/02/26, Science News, Tools from molecular biology are providing new insights into the viruses employed by parasitoid wasps to manipulate their caterpillar hosts.
- Within C.I.A., Growing Worry of Prosecution for Conduct, Douglas Jehl, David Johnston, 05/02/27, NYTimes, There is an expanding circle of inquiries into possible misconduct by C.I.A. officers during detentions of terrorism suspects.
- Afghans Accuse U.S. of Secret Spraying to Kill Poppies, Carlotta Gall, 05/02/27, NYTimes, Farmers are convinced that someone is surreptitiously spraying their lands or dusting them with chemicals, presumably in a clandestine effort to eradicate Afghanistan's bumper poppy crop.
- Divergent Paths: Canada Breaks With U.S. Over Missile Shield, Clifford Krauss, 05/02/27, NYTimes, Many national security experts consider the decision to be a fundamental shift from the sharing of responsibility for continental defense.
- How to Save Medicare? Die Sooner, Daniel Altman, 05/02/27, NYTimes, With end-of-life care likely to become a greater portion of Medicare's costs, some experts argue that efforts to prolong life may end up only prolonging suffering.
- Will Stunts of Sweeps Month Sober Up?, Lorne Manly, 05/02/28, NYTimes, With the new Nielsen meters rolling out across the country, local stations will have demographic information year around, not just four times a year.
- Introducing 'Dirty Harry,' via Video Game, to a New Generation, Noah Robischon, 05/02/28, NYTimes, Clint Eastwood will lend his voice and likeness to a ¡§Dirty Harry¡¨ video game that will include characters and settings from the five-film franchise in an original storyline.
- Cyberspace to Outer Space, Let's Have a Conference and Go There, Matt Richtel, 05/02/28, NYTimes, From Cyberspace to Outer Space Esther Dyson, the Internet pundit, has a new mission. She is planning a conference called Flight School to discuss how best to send people to outer space.
- Symmetric Brownian Motor, A. Gomez-Marin, J. M. Sancho, 05/02/8
- Onset Of Patterns In An Oscillated Granular Layer: Continuum And Molecular Dynamics Simulations, 05/02/8, Phys. Rev. E 71, 021301
- Information Technology Policies And Standards: A Comparative Review Of The States, J. R. G.-García - jgil-garcia
ctg.albany.edu, 2004/12/01, Journal of Government Information, DOI: 10.1016/j.jgi.2004.10.001 - Emerging Communication and Cooperation in Evolving Agent Societies, P.C. Buzing, A.E. Eiben, M.C. Schut, 2005/01/31, JASSS
- Agents in Living Color: Towards Emic Agent-Based Models, Michael Agar, 2005/01/31, JASSS
- SISTER: a Symbolic Interactionist Simulation of Trade and Emergent Roles, Deborah Vakas Duong, John Grefenstette, 2005/01/31, JASSS
- Simulating the Emergence of New Religious Movements, M. Afzal Upal, 2005/01/31, JASSS
- Social Cognitive Maps, Swarm Perception and Distributed Search on Dynamic Landscapes, Vitorino Ramos, Carlos Fernandes, Agostinho C. Rosa, 2005/02, CVRM-IST 127E-2005 technical report
- Robots That Act Like Rats, 2005/02/21, ScienceDaily & University Of California - Davis
- Self-Replicating Strands that Self-Assemble into User-Specified Meshes, Robert Ewaschuk, Peter Turney, 2005/02/22, arXiv, DOI: cs.NE/0502087
- Ascent Exhalations Of Antarctic Fur Seals: A Behavioural Adaptation For Breath-Hold Diving?, J. R. Waas, P. W. Colgan, P. T. Boag, 2005/02/22, Proceedings: Biological Sciences, DOI: 10.1098/rspb.2004.2964
- Murder, Eyewitness Identification And The Limits Of Human Vision, 2005/02/22, ScienceDaily & University Of Washington
- Conversational 'Black Holes' Reveal Uncertainty In Offices, 2005/02/22, ScienceDaily & Penn State
- Brain Center Shows There Is Accounting For Taste, 2005/02/24, ScienceDaily & Cell Press
- Air Pollution Thickens The Blood, Study Shows, 2005/02/24, ScienceDaily & British Medical Journal
- Biological Invasions In The Antarctic: Extent, Impacts And Implications, Y. Frenot - yves.frenot
univ-rennes1.fr, S. L. Chown, J. Whinam, P. M. Selkirk, P. Convey, M. Skotnicki, D. M. Bergstrom, Feb. 2005, Biological Reviews, DOI: 10.1017/S1464793104006542 - Species-Energy Relationships At The Macroecological Scale: A Review Of The Mechanisms, J. M. C. Hutchinson - hutch
mpib-berlin.mpg.de, Feb. 2005, Biological Reviews, DOI: 10.1017/S1464793104006517 - Frequency clustering of coupled phase oscillators on small-world networks, L.G. Morelli, H.A. Cerdeira1 and D.H. Zanette, February 25, 2005, Eur. Phys. J. B 43, 243-250 (2005) , DOI: DOI: 10.1140/epjb/e2005-00046-2
- Representations And Actions: The Transformation Of Work Practices With IT Use, E. Vaasta - emmanuelle.vaast
liu.edu, G. Walsham - g.walsham
jims.cam.ac.uk, Jan. 2005, Online 2004/12/21, Information and Organization, DOI: 10.1016/j.infoandorg.2004.10.001 - Implantable Cardiac Pacemaker Electromagnetic Compatibility Testing In A Novel Security System Simulator, Kainz, W., Casamento, J. P., Ruggera, P. S., Chan, D. D., Witters, D. M., Mar. 2005, IEEE Transactions on Biomedical Engineering
- Nonlinear Control Of A Dynamic Model Of HIV-1, Ge, S. S., Tian, Z., Lee, T. H., Mar. 2005, IEEE Transactions on Biomedical Engineering
- Gender: A Major Determinant Of Brain Response To Nicotine, J. H. Fallon, D. B. Keator, J. Mbogori, D. Taylor, S. G. Potkin, Mar. 2005, The International Journal of Neuropsychopharmacology, DOI: 10.1017/S1461145704004730
- Online Learning: A Strategy For Social Responsibility In Educational Access, B. L. Stewart - bstewart
uh.edu, Online 2004/11/05, The Internet and Higher Education, DOI: 10.1016/j.iheduc.2004.09.003 - Hybrid Structures: Faculty Use And Perception Of Web-Based Courseware As A Supplement To Face-To-Face Instruction, R. Woods - rwoods
arbor.edu, J. D. Baker - jasobak
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- Anticipating Military Nanotechnology, Altmann, J., Gubrud, M., Winter 2004, Technology and Society Magazine, IEEE
- The Politics Of Small Things: Nanotechnology, Risk, And Uncertainty, Wilsdon, J., Winter 2004, Technology and Society Magazine, IEEE
Webcast Announcements
World Economic Forum , Davos, Switzerland, 05/01/26-30
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1st European Conference on Complex Systems, Torino, Italy, 04/12/5-7
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Neurobiological Foundation For The Meaning Of Information, Kolkata, India, Conference Webcast, 04/11/22-25
- ALife 9: Ninth International Conference on Artificial Life, Boston, MA, 04/09/12-15
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The 4th Intl Workshop on Meta-synthesis and Complex System, Beijing, China, 04/07/22-23
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Intl Conf on Complex Networks: Structure, Function and Processes, Kolkata, India, 04/06/27-30
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From Autopoiesis to Neurophenomenology: A Tribute to Francisco Varela (1946-2001), Paris, France, 2004/06/18-20
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ECC8 Experimental Chaos Conference, Florence, Italy,
04/06/14-17
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Evolutionary Epistemology, Language, and Culture, Brussels, Belgium, 04/05/26-28
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International Conference on Complex Systems 2004, Boston, 04/05/16-21
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Life, a Nobel Story, Brussels, Belgium, 04/04/28
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Nonlinear Dynamics and Statistical Mechanics Days, Brussels, Belgium, 04/04/26-27
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Science Education Forum for Chinese Language Culture, Panel Discussion, Taipei, Taiwan, 04/05/01
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Biologically Inspired Approaches to Advanced Information Technology, , Lausanne,Switzerland, 04/01/29-30
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Nonlinear Dynamics And Chaos: Lab Demonstrations, Strogatz, Steven H., Internet-First University Press, 1994
- CERN Webcast Service, Streamed videos of Archived Lectures and Live Events
- Dean LeBaron's Archive of Daily Video Commentary, Ongoing Since February 1998
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Conference & Call for Papers Announcements
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Online Course on Genetic Programming, with Lee Altenberg, University of Hawaii Outreach College 2005/01/10 to 2005/05/13.
- Physik seit Einstein,
Berlin, Germany, 05/03/04-09
- 2005 Meeting Arbeitskreis
Physik sozio-oekonomischer Systeme, AKSOE (Socio-Economic-Physics)
- 2005 World Exposition "
Nature's Wisdom, Aichi, Japan, 05/03/25-09/25
- FINCO 2005: Foundations Of Interactive Computation, Edinburgh, Scotland, 05/04/09
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5th Creativity And Cognition Conference, London.UK, 05/04/12-15
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Social Intelligence and Interaction in Animals, Robots and Agents, Hatfield, UK, 05/04/12-15
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2005 NSTI Nanotechnology Conference and Trade Show
Nanotech 2005, Anaheim, California, U.S.A., 05/05/08-12
Socio-Dynamics, Networks and Markets, London, 05/05/09-11
- 2ndShanghai Intl Symposium on Nonlinear Science and Applications, Shanghai, 05/06/03-07
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IEEE Swarm Intelligence Symposium
Pasadena, California, USA, 05/06/08-10
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10th Annual Workshop on Economic Heterogeneous Interacting Agents (WEHIA 2005) , University of Essex, United Kingdom, 05/06/13-15
- Powders & Grains 2005, Stuttgart, Germany, 05/06/18-22
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NKS Summer School,
Brown University, Providence, RI, 05/06/20-07/08
- 6th Intl Conf Symmetry in Nonlinear Mathematical Physics, Kiev, Ukraine, 05/06/20-26
- Workshop on Complexity and Policy Analysis, Cork, Ireland, 05/06/22-24
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2005 Genetic And Evolutionary Computation Conference (GECCO-2005), Washington, DC, USA, 05/06/25-29
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6th Intl Summer School/Conference "Let's Face Chaos Through Nonlinear Dynamics"Dedicated to the 75th Birthday of Professor Siegfried Grossmann, Maribor, Slovenia, 05/06/26-07/10
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WOSC 13th International Congress Of Cybernetics And Systems, Maribor, Slovenia, 05/07/06-10
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4th International Workshop on Computational Intelligence in Economics and Finance (CIEF'2005), Salt Lake City, 05/07/21-26
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5th Gathering on Biosemiotics, Urbino, Italy, 05/07/22-24
- Soc for Chaos Theory in Psychology & Life Sciences
15th Annual Intl Conf, Denver, CO, USA, 05/08/04-06
- ECAL 2005 - VIIIth European Conference on Artificial Life, Canterbury, Kent, UK, 05/09/05-09
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Complexity, Science and Society Conf 2005, Liverpool, UK, 05/09/11-14
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18th International Conference on Noise and Fluctuations (ICNF 2005), Salamanca, Spain, 05/09/19-23
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CSDS-2005 Intl Conf on CONTROL AND SYNCHRONIZATION OF DYNAMICAL SYSTEMS , Leon, Guanajuato, MEXICO, 05/10/04-07
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3rd International Complexity Science and Educational Research Conference, Robert, Louisiana, 05/11/20-22, see also: Complicity: An International Journal of Complexity and Education, Inaugural issue - Free Online Access