New Study Questions Pandemic Containment Plan, Science Now
Excerpts: An audacious global plan to stop future influenza pandemics in their tracks-- adopted by the World Health Organization (WHO) last month--may have an important flaw, researchers say in a new paper. The plan, based on containing an epidemic where it first erupts, may initially work, they write, but later-emerging pandemics would likely overwhelm it. (...)
The scheme may halt the first pandemic, write Marc Lipsitch and colleagues at Harvard and Carl Bergstrom at the University of Washington (UW) in Seattle, in a paper published online today in Public Library of Science Medicine.
Europe's Chill Linked To Disease, BBC News
Europe's "Little Ice Age" may have been triggered by the 14th Century Black Death plague, according to a new study. Pollen and leaf data support the idea that millions of trees sprang up on abandoned farmland, soaking up carbon dioxide from the atmosphere. This would have had the effect of cooling the climate, a team from Utrecht University, Netherlands, says. The Little Ice Age was a period of some 300 years when Europe experienced a dip in average temperatures.
Bubonic plague may have wiped out over a third of Europe's population
Parasitology: Switching Like For Like, Nature
Excerpts: To remain hidden from its host's immune system, the malaria parasite must vary the proteins on the surface of the infected cell. The genes encoding these proteins are very similar, so how does the parasite express just one at a time?
Conceptual Continuity As A Mode Of Understanding Complex Systems, Complexity
Excerpts: In complex biological systems, entities that are conceptually distinct but empirically related - such as sunlight and plant growth or antigene and immune response - are being explicitly linked through the identification of highly specific uninterrupted interaction sequences that take place between their macromolecular system components. (...) Examples are introduced to suggest that in sociopolitical systems, an analogous conceptual continuity can be established between distinct sociopolitical entities. The identification of specific shared elements, essential for the well being of each of the entities, can play a significant role in resolving conflicts between those separated by seemingly insurmountable obstacles (...).
Excerpts: As the financial markets increasingly move into the realm of computer models and derivative instruments, the ramifications for the global economy and the lives we lead are only beginning to be understood. Increasing amounts of the world's wealth are being traded indirectly rather than directly, which raises questions that governments, regulators and investors are only beginning to address. While governments still debate free trade in physical goods, the volume of intangible goods being traded without restraint grows at an exponential rate.
Taking Spying To Higher Level, Agencies Look For More Ways To Mine Data, NY Times
Excerpts: (...) importing telephone call records into her software and was immediately led to a pattern of calls between prisoners and a recent parolee. She overlaid the calling data with records of prisoners' financial accounts, and based on patterns that emerged, she began monitoring phone calls of particular inmates. That led her to coded messages being exchanged in the calls that revealed that seemingly innocuous wood blocks were being used to smuggle drugs into the prison.
"(...) created a very clear picture of the smuggling ring," (...).
Collaborative Programs: Genome Consortium For Active Teaching (Gcat), Science
Excerpts: Biological research has been transformed in recent years by substantial advances in efficient data accumulation. The transcription output for every gene in a genome now can be measured in an afternoon; before it might have taken years. However, the recent advances in technology have yet to be incorporated into many biology classrooms (1). Most undergraduates are taught the same way their instructors were taught, which seldom reflects leading-edge research practices. Training faculty in the latest research methods is not well supported on most campuses (2). Worse yet, when students with outdated undergraduate science experiences become primary and secondary school teachers, they condemn future generations to inadequate preparation for college.
Initiating a Mexican Wave: An Instantaneous Collective Decision With Both Short and Long Range Interactions, arXiv
Abstract: An interesting example for collective decision making is the so-called Mexican wave during which the spectators in a stadium leap to their feet with their arms up and then sit down again following those to their left (right) with a small delay. Here we use a simple, but realistic model to explain how the combination of the local and global interactions of the spectators produces a breaking of the symmetry resulting in the replacement of the symmetric solution -- containing two propagating waves -- by a single wave moving in one of the two possible directions. Our model is based on and compared to the extensive observations of volunteers filling out the related questionnaire we have posted on the Internet. We find that, as a function of the parameter controlling the strength of the global interactions, the transition to the single wave solution has features reminiscent of discontinuous transitions. After the spontaneous symmetry breaking the two directions of propagation are still statistically equivalent. We investigate also how this remaining symmetry is broken in real stadia by a small asymmetrical term in the perception of spectators.
Preyed Upon, Hominids Began To Cooperate, Science
Excerpts: Dogma has it that humans and our ancestors have always been violent and warlike, in part because we evolved as hunters, says biological anthropologist Robert Sussman of Washington University in St. Louis, Missouri. Proponents of that view cite evidence of aggression in modern primates, fossil evidence of hunting by early hominids, and anthropological studies of war and violence in human tribal and hunter-gatherer cultures.
Social Segregation and the Dynamics of Group Inequality, SFI Working Papers
Abstract: We explore the dynamics of group inequality when segregation of social networks places the initially less affluent group at a disadvantage in acquiring human capital. Extending Loury (1977), we demonstrate that (i) group differences in economic success can persist across generations in the absence of either discrimination or group differences in ability, provided that social segregation is sufficiently great, (ii) there is a threshold level of integration above which group inequality cannot be sustained, (iii) this threshold varies systematically but non-monotonically with the population share of the disadvantaged group, (iv) crossing the threshold induces convergence to a common high level of human capital if the less affluent population share is sufficiently small (and the opposite, otherwise), and (v) a race-neutral policy that reduces the cost of acquiring human capital can expand the range over which reducing segregation can be Pareto-improving.
'Jurassic Beaver' Found In China, BBC News
The discovery of a fossil beaver that lived when the dinosaurs ruled the Earth could challenge some currently accepted ideas on mammal evolution. Castorocauda lutrasimilis, which was unearthed in China, is a species previously unknown to science. It dates back to 164 million years ago, a time when mammals were thought to be primitive creatures confined to land.
An artist's impression of Castorocauda lustrasimilis
Developmental Origins of Animal Body Plans, SFI Working Papers
Excerpts: There is a variety of questions one might like to answer about the origin of animal bodyplans: When did these bodyplans arise? What was the rate of developmental and morphological innovation associated with these events? How reliably does the fossil record reflect the pattern of metazoan divergences and the timing of origin of bodyplans? How do these events relate to environmental and ecological changes? And more broadly, what, if anything, does this evolutionary episode tell us about the nature of the evolutionary process? (..) Here I will focus largely on the developmental aspects of the origin of animal bodyplans (...) Contrary to all expectation, such comparative studies have revealed remarkable conservation of regulatory elements across considerable phylogenetic distance.
Early Mammalian Evolutionary Experiments, Science
Excerpts: Mammals of the Mesozoic era (248 to 65 million years ago) generally are considered to be primitive, shrew-like creatures living in the shadow of the dinosaurs (1). Only after the extinction of the dinosaurs at the end of the Cretaceous era (144 to 65 million years ago) did they have a chance to explore a greater variety of ecological niches. During the adaptive radiation that began about 65 million years ago, mammals were able to invade all kinds of terrestrial environments, even the aquatic and aerial realms.
Most sea squirts are little more than rubbery blobs that stick to shells and rocks on the sea floor. Yet a new genetic analysis puts them into the evolutionary spotlight: these creatures, also known as tunicates, are the closest relatives to vertebrates. The finding strengthens the case for revising the traditional view of how vertebrates arose, says Herv? Philippe, an evolutionary biologist from the University of Montreal, Canada. Vertebrates belong to a group of animals called chordates.
Ugly sister. Tunicate larvae (top) but not adults (bottom) have vertebratelike features. Credit: P. Dehal et al. Science 298, 2111 (2002)
Mutant Chickens Grow Teeth, Science Now
Warning: Mutant chickens may bite. Researchers have identified a genetic mutation that creates incipient teeth in bird embryos. The discovery provides a modern day glimpse of a feature that hasn't been seen in avians for millions of years. Birds lost their choppers 70 million to 80 million years ago. That's what made an experiment in 1980 so surprising: After scientists grafted oral tissue from mice onto a chicken's gums, the birds grew round, mouselike teeth. But because avians and mammals are not closely related, scientists doubted whether the experiment proved that birds had truly retained a genetic vestige of their forbearers' bite.
Small bites. The jaw of the talpid2 mutant chick (aged 16 days) shows the beginnings of conelike teeth. Credit: M. Harris et al. Current Biology 16 (2006)
For the past 50 years, it's been assumed that differences in male and female brains are generated by the doses of sex hormones they get before birth and throughout life. Now scientists have fingered a gene on the Y chromosome that they say directly molds the brain and behavior independent of the action of hormones. In 1990, scientists identified a gene called Sry, which causes testes to form. Because that gene directly affects the developing embryo's gonadal ridge tissue, scientists have suspected that Sry and other Y chromosome genes could shape additional tissues, including brain cells.
What's on your mind? The male rat brain (above) shows abundant expression of Sry gene, particularly in the substantia nigra (SN) and mamillary bodies (MMB). The female brain (below) lacks the gene. Credit: Eric Vilain
Memory Aided By Meaning - How To Get Your Brain Geared Up To Remember, Nature News
Excerpts: Neuroscientists have discovered that how successfully you form memories depends on your frame of mind not just during and after the event in question, but also before it. (...)
But it turns out that if your brain is 'primed' to receive information, you will have less trouble recalling it later.
By scanning the brain during these memory tests, the researchers found they could see this priming in action. By watching brain activity they could predict whether the participant would remember a subsequent event, before the event itself had happened.
When Seeing Is Misleading: Clutter Leads To High-Confidence Errors, Innovations-report
Excerpts: Did you ever arrange to meet a friend at a busy street corner, then rush up to a total stranger thinking it was your friend? Neuroscientists have a theory to explain why such potentially embarrassing mistakes occur. They probe the underlying perceptual and neural processes of visual search by studying how distracters affect performance of a visual search task. One might intuitively expect that as background noise created by distracters and errors increase, confidence in one's decision plummets. But in a new study (...) show that just the opposite happens. (...).
Neurobiology: Efficiency Measures, Nature
Excerpts: The nervous system translates sensory information into electrical impulses. The neural 'code' involved seems to represent natural sounds and images efficiently, using the smallest number of impulses. Our perception of the outside world relies on the transformation of physical signals (such as light and sound) into a pattern of neural impulses, or spikes. These spikes are then transmitted to higher brain regions, where they are further transformed into other patterns of sensory spikes, and ultimately into the motor spikes that mediate behaviour.
Neurological Technology Attracts Doctors, NY Times
Excerpts: (...) emerging class of implantable medical devices called neuromodulators -- tiny machines that stimulate the central nervous system to treat a host of disorders. Analysts say they could be the next big thing for some of the market's hottest medical technology companies.
Of course, the same hurdles that have stood in the way of other medical technologies will have to be overcome, including getting government approvals, securing adequate insurance reimbursements and persuading busy doctors to learn to use the devices.
Tweaking The Real World, Science Now
Would you notice if the room around you gradually shrank to a quarter of its size? Perhaps not, according to a virtual reality experiment that suggests that we ignore what we see if it clashes with our assumptions about the everyday world. When you think about the kind of calculations that are needed to judge the relative scale of things, it's amazing that looking around a room feels so effortless. At a glance, we can accurately judge the size of lamps and chairs no matter where they are.
Too weird. People unconsciously ignored their environment when a virtual room's size gradually expanded or shrank. Credit: Stuart Gilson / Oxford University
Buff And Brainy - Exercising The Body Can Benefit The Mind, Science News
This is part one of a two-part series on lifestyle and brain fitness.
Anyone who frequents the local gym has probably noticed a cyclical pattern to attendance. Workout kings and queens exercise religiously throughout the year, but as swimsuit season approaches, a rash of new faces flocks to the facility. Every treadmill is taken, each elliptical machine is engaged, and without fail, there's a waiting line for a weight machine.
Immunology: Foiled Dendritic Cell Suicide May Lead To Autoimmunity, Science
Excerpts: When the immune system malfunctions, it can become a turncoat, attacking the body's own tissues. Such autoimmune attacks underlie many diseases, including juvenile-onset diabetes. Immunologists trying to understand these attacks have long focused on overactivity of the T lymphocytes of the immune system. New results now point to a key role for another type of cell: dendritic cells.
Dendritic cells activate lymphocytes to fight infection. They then die by a form of cell suicide called apoptosis, possibly cutting the risk of an autoimmune attack.
Huge Protein-Interaction Database Could Save Lives, New Scientist
Excerpts: The first large-scale analysis of how proteins interact inside our cells may help biologists identify novel gene mutations involved in human disease, researchers say. The laborious analysis, which has so far reviewed 25,000 protein interactions, suggests that important proteins do not necessarily interact with many others. To construct this "interactome", Akhilesh Pandey of the Johns Hopkins School of Medicine, US, and his colleagues worked with about 70 biologists in Bangalore, India.
Enzyme Computer Could Live Inside You, New Scientist
Excerpts: A molecular computer that uses enzymes to perform calculations has been built (...). (...) enzyme-powered computers could eventually be implanted into the human body and used to, for example, tailor the release of drugs to a specific person's metabolism. The team built their computer using two enzymes - (...) - to trigger two interconnected chemical reactions. Two chemical components - (...) - were used to represent input values (A and B). (...) The chemical result of the enzyme-powered reaction was determined optically.
Bacterial Small-Molecule Signaling Pathways, Science
Excerpts: Bacteria use diverse small molecules for extra- and intracellular signaling. They scan small-molecule mixtures to access information about both their extracellular environment and their intracellular physiological status, and based on this information, they continuously interpret their circumstances and react rapidly to changes. Bacteria must integrate extra- and intracellular signaling information to mount appropriate responses to changes in their environment. We review recent research into two fundamental bacterial small-molecule signaling pathways: extracellular quorum-sensing signaling and intracellular cyclic dinucleotide signaling.
Biocomplexity In A Highly Migratory Pelagic Marine Fish, Atlantic Herring, Proc. Biol. Sc.
Excerpts: The existence of biologically differentiated populations has been credited with a major role in conferring sustainability and in buffering overall productivity of anadromous fish population complexes where evidence for spatial structure is uncontroversial. Here, we describe evidence of correlated genetic and life history (spawning season linked to spawning location) differentiation in an abundant and highly migratory pelagic fish, (...). Our study suggests the existence of more complex patterns of intraspecific diversity than was previously recognized. Sustainability may be compromised if such complex patterns are reduced through generalized management (e.g. area closures) that overlooks population differences in spatial use throughout the life cycle.
- Source: Biocomplexity In A Highly Migratory Pelagic Marine Fish, Atlantic Herring, D. E. Ruzzante, S. Mariani, D. Bekkevold, C. André, H. Mosegaard, L. A. W. Clausen, T. G. Dahlgren, W. F. Hutchinson, E. M. C. Hatfield, E. Torstensen, J. Brigham, E. J. Simmonds, L. Laikre, L. C. Larsson, R. J. M. Stet, N. Ryman, G. R. Carvalho, DOI: 10.1098/rspb.2005.3463, Proceedings: Biological Sciences, 2006/02/21
- Contributed by Atin Das - dasatinyahoo.co.in
Big Woman With A Distant Past: Stone Age Gal Embodies Humanity's Cold Shifts, Science News
A 260,000-year-old partial skeleton excavated in northwestern China 22 years ago represents our largest known female ancestor, according to a new analysis of the individual's extensive remains.
LARGE LADY. A new analysis of a partial Stone Age skeleton, including this skull, identifies it as coming from the biggest known female among human ancestors. Rosenberg
This ancient woman puts a modern twist on Stone Age human evolution, say Karen R. Rosenberg of the University of Delaware in Newark, L? Zun? of Peking University in Beijing, and Chris B. Ruff of Johns Hopkins University School of Medicine in Baltimore. The fossil individual's large size and the apparent adaptation of her body to cold conditions are "consistent with the idea that patterns of human anatomical variation that we see today have deep evolutionary roots," Rosenberg asserts.
Excerpts: The flight attendant closes the door, and we all turn off our cell phones, right? Wrong. People use cell phones on airlines quite a bit, even when they're not supposed to, a new study shows. Because the signals given off by phones and other electronic devices can interfere with a plane's navigation, the researchers argue that steps should be taken to reduce any potential threats before passengers are allowed to use cell phones routinely on flights. Avionic equipment has trouble deciphering navigation signals when a crowd of personal electronic gadgets creates background noise.
Nanoscience Study Shows That Quantum Dots 'Talk', ScienceDaily
Excerpts: Scientists who hope to use quantum dots as the building blocks for the next generation of computers have found a way to make these artificial atoms communicate. "Essentially, the dots talk to each other," said (...). The dots are tiny, engineered spherical crystals about 5 nanometers in diameter. An average biological cell, in comparison, has a diameter of about 1,000 nanometers. Researchers believe that quantum dots will be extremely useful in developing nanoscale technologies because they are versatile and uniform, which could eliminate possible variations and flaws in materials. (...)
Easy Answers: Quantum Computer Gives Results Without Running, Science News
Excerpts: When there's a match, the computer emits a red photon with specific traits. If there's no match, the outgoing photon has different characteristics.
The team incorporated the computer into a larger setup that included a beam splitter upstream to provide a path around the computer. Given its quantum nature, a trigger photon simultaneously enters and doesn't enter the computer. "This puts the quantum computer in a superposition of running and not running," Hosten explains.
Quantum Information: To Compute Or Not To Compute?, Nature
Excerpts: Quantum physics aims another blow at common sense: a simple quantum computer gives the right answer, even when it is not run. (Traditionalists be comforted: the computer must be turned on.) (...) A few years ago, it was pointed out3 that an all-optical quantum computer could replace Elitzur and Vaidman's bomb. Rather than exploding or not, this computer either runs a program or doesn't, depending on whether or not a single photon impinges on its 'run' switch3. And just as we can obtain the answer to the question 'is the bomb there?' without exploding it, so we can obtain the right answer from the computer without running it.
A Quantum Swimmer Never Gets Tired, Science Now
If you're ever shrunk to nano-scale and chilled to near absolute zero, take solace in this fact: Swimming may be a whole lot easier. A team of mathematical physicists has calculated that miniscule robots swimming in a frigid quantum fluid can propel themselves without losing energy. Theorists have pondered the idea of shape-changing robots squirming through a viscous fluid. Such studies provide insight into the finer points of fluid dynamics and might help to create real swimming robots. But taking a more whimsical tack, Joseph Avron and Boris Gutkin of the Technion-Israel Institute
Effortless. Shrunk to nanometer size, a tiny robot might swim through a quantum fluid without losing energy. Credit: Avron et al., New J. Phys. 7, 234 (2005)
Implementing A Quantum Computation By Free Falling, Science
Excerpts: A quantum computation could be viewed as a path along a landscape of hills and valleys. The desired unitary evolution of states in the computation is represented by U. For the quickest path to the target unitary there exists a computation that runs at approximately the travel time. One wants to learn whether there is an efficient computation (polynomial time) or whether the computation is inefficient (exponential time).
Quantum Computation as Geometry, Science
Excerpts: Quantum computers hold great promise for solving interesting computational problems, but it remains a challenge to find efficient quantum circuits that can perform these complicated tasks. Here we show that finding optimal quantum circuits is essentially equivalent to finding the shortest path between two points in a certain curved geometry. By recasting the problem of finding quantum circuits as a geometric problem, we open up the possibility of using the mathematical techniques of Riemannian geometry to suggest new quantum algorithms or to prove limitations on the power of quantum computers.
Entanglement Heats Up, Physics Web
"Entanglement" could occur at any temperature and not just in systems cooled to near zero according to new calculations by a team of physicists in the UK, Austria and Portugal. Vlatko Vedral of the University of Leeds and colleagues at the universities of Porto and Vienna have found that the photons in ordinary laser light can be quantum mechanically entangled with the vibrations of a macroscopic mirror, no matter how hot the mirror is. The result is unexpected because hot objects are usually thought of being classical. The finding suggests that macroscopic entanglement is not as difficult to create as previously believed and could have implications for making room-temperature quantum computers in the future
The picture represents entanglement as a function of the effective coupling between light and mirror (k) and the effective duration of the coupling (the x axis). The red area is where entanglement is maximal (image credit: V Vedral).
Macroscopic Thermal Entanglement Due To Radiation Pressure, Phys. Rev. Lett. 96
Excerpts: Can entanglement and the quantum behavior in physical systems survive at arbitrary high temperatures? In this Letter we show that this is the case for a electromagnetic field mode in an optical cavity with a movable mirror in a thermal state. We also identify two different dynamical regimes of generation of entanglement separated by a critical coupling strength.
Vying For The R&D Edge, Science Now
China has arrived as a scientific powerhouse. Or has it? There's no question that the country is pouring money into research. But whether it should be ranked third--behind only the United States and Japan--and the absolute size of that investment is much harder to assess. That's just one of many points made by the latest compendium of international trends in science issued today by the National Science Foundation (NSF).
Pulling ahead? China has rapidly increased its R&D spending over the past several years. (EU-25 = European Union) Credit: OECD, Main Science and Technology Indicators (various years).
Us Scientists Fight Political Meddling, Nature
Excerpts: Nobel laureate attacks government's suppression of research findings.
The rift between US scientists and the administration of President George W. Bush widened last weekend, as Nobel-prizewinning biologist David Baltimore (...) denounce government suppression of scientific findings.
(...) Baltimore - the president-elect of the AAAS - urged scientists to challenge perceived censorship of their research. Tensions between the Bush administration and researchers have been high for years, but Baltimore said he had recently grown convinced that the problem cannot be shrugged off as the usual battles between science and politics.
Complex Challenges: Global Terrorist Network
Iraq Makes Terror 'More Likely', BBC News
Excerpts: People across the world overwhelmingly believe the war in Iraq has increased the likelihood of terrorist attacks worldwide, a poll for the BBC reveals. Some 60% of people in 35 countries surveyed believe this is the case, against just 12% who think terrorist attacks have become less likely. In most countries, more people think removing Saddam Hussein was a mistake than think it was the right decision. Some 41,856 people were questioned in the poll for the BBC's World Service.
Using Terror To Fight Terror, The Observer
Two years ago, David Rose was the first journalist to interview the Tipton Three after their release from Guantanamo Bay. Now he applauds Michael Winterbottom's award-winning film of their ordeal - and finds out what has happened to the men since . (...)
Scene from The Road to Guantanamo
Winterbottom's avowed objective of 'humanising' their story, of showing through their own words how three 'ordinary British teenagers' got caught up in tumultuous, global events, also succeeds triumphantly. 'We were all told that the people in Guantanamo were the most dangerous terrorists in the world, (...).
Links & Snippets
- Computation of Explicit Preimages in One-Dimensional Cellular Automata Applying the De Bruijn Diagram, Jose Manuel Gomez Soto, SFI Working Papers, DOI: SFI-WP 06-02-005
- Nonextensive Models For Earthquakes, R. Silva, G. S. Fran?a, C. S. Vilar, J. S. Alcaniz, 06/02/01
- Statistics Of Cycles In Large Networks, Konstantin Klemm, Peter F. Stadler, 06/02/03
- Experimental Steady Pattern Formation In Reaction-Diffusion-Advection Systems, David G. Miguez, Razvan A. Satnoianu, Alberto P. Muzuzuri, 06/02/03
- Finite-Size Effects On Open Chaotic Advection, Rafael D. Vilela, Alessandro P. S. de Moura, Celso Grebogi, 06/02/03, Phys. Rev. E 73, 026302
- Wave-Vector Resonance In A Nonlinear Multiwavespeed Chaotic Billiard, Alexei Akolzin, Richard L. Weaver, 06/02/05
- Theoretical Analysis Of Destabilization Resonances In Time-Delayed Stochastic Second-Order Dynamical Systems And Some Implications For Human Motor Control, K. Patanarapeelert, T. D. Frank, R. Friedrich, P. J. Beek, I. M. Tang, 06/02/06
- Coarse-Graining Of Cellular Automata, Emergence, And The Predictability Of Complex Systems, Navot Israeli, Nigel Goldenfeld, 06/02/06
- Bump Formation In A Binary Attractor Neural Network, Kostadin Koroutchev, Elka Korutcheva, 06/02/07
- Comprehensive Study Of Pattern Formation In Relaxational Systems, Kevin Wood, Javier Buceta, Katja Lindenberg, 06/02/08
- Energy And Momentum Of Light In Dielectric Media, Sjoerd Stallinga, 06/02/09, Phys. Rev. E 73, 026606
- Scale-Free Networks Emerging From Weighted Random Graphs, Tomer Kalisky, Sameet Sreenivasan, Lidia A. Braunstein, Sergey V. Buldyrev, Shlomo Havlin, H.Eugene Stanley, 06/02/10
- Traffic Dynamics Based On Local Routing Protocol On A Scale-Free Network, Wen-Xu Wang, Bing-Hong Wang, Chuan-Yang Yin, Yan-Bo Xie, Tao Zhou, 06/02/10
- Lag Synchrony Measures Dynamical Processes Underlying Progression Of Seizure States, Benjamin H. Singer, Miron Derchansky, Peter L. Carlen, Micha ochowski, 06/02/17
- Detecting And Characterizing Phase Synchronization In Nonstationary Dynamical Systems, Ying-Cheng Lai, Mark G. Frei, Ivan Osorio, 06/02/17
- Turning Buildings on Their Heads, John Travis, 06/02/19,
ScienceNOW Daily News. In the 19th century, architect Antoni Gaudi designed unusual and complex buildings by hanging weights from chains; considered upside-down, the results provided a blueprint.
Soaring structure. An example of a design created by the new software. Credit: Axel Kilian
- Quantum Teleporter Creates Laser Beam Clones, Jeff Hecht,, 06/02/21, NewScientist, A new experiment has now demonstrated ¡§quantum telecloning¡¨ - transporting a whole laser beam to two separate places.
- Paging Mr. Chromosome, Michael Schirber, 06/02/22, ScienceNOW Daily News
- Hybrid Grammar-Based Approach To Nonlinear Dynamical System Identification From Biological Time Series, B. A. McKinney, J. E. Crowe, Jr., H. U. Voss, P. S. Crooke, N. Barney, J. H. Moore, 06/02/22
- Particle Physics: Quarks On A Gravitational String, Nick Evans, 06/02/23, Nature 439, 921-923. Quantum chromodynamics, the theory of the strong nuclear force, is notoriously intractable. An alternative approach brings gravity to bear, and produces fairly accurate predictions of some physical quantities., DOI: 10.1038/439921a
- Evolution: Careful With That Amphioxus, Henry Gee, 06/02/23, Nature 439, 923-924. The textbook tale of vertebrate origins is brought into question by phylogenetic analyses of new genomic data. But the amphioxus, long viewed as a precursor to fish, remains a central character in events., DOI: 10.1038/439923a
- A New Radiocarbon Revolution And The Dispersal Of Modern Humans In Eurasia, Paul Mellars, 06/02/23, Nature 439, 931-935. (...) period of coexistence with the preceding Neanderthal was shorter., DOI: 10.1038/nature04521
- Adaptive Filtering Enhances Information Transmission In Visual Cortex, Tatyana O. Sharpee, Hiroki Sugihara, Andrei V. Kurgansky, Sergei P. Rebrik, Michael P. Stryker, Kenneth D. Miller, 06/02/23, Nature 439, 936-942. Adaptation affects the spatial frequency composition of the filter, enhancing sensitivity to under-represented frequencies in agreement with optimal encoding arguments. Adaptation occurs over 40 s to many minutes, longer than most previously reported forms of adaptation., DOI: 10.1038/nature04519
- Quantum Supercurrent Transistors In Carbon Nanotubes, Pablo Jarillo-Herrero, Jorden A. van Dam, Leo P. Kouwenhoven, 06/02/23, Nature 439, 953-956, DOI: 10.1038/nature04550
- Light-Induced Chaotic Rotations In Nematic Liquid Crystals, E. Brasselet and L. J. Dub?, 06/02/23
- Self-Organized Packs Selection In Predator-Prey Ecosystems, Andrzej Pkalski, Michel Droz, 06/02/23
- Nonlocal Coupling Can Prevent The Collapse Of Spatiotemporal Chaos, Safia Yonker, Renate Wackerbauer, 06/02/23, Phys. Rev. E 73, 026218
- Observation Of Chaotic Itinerancy In The Light And Carrier Dynamics Of A Semiconductor Laser With Optical Feedback, Will Ray, Wing-Shun Lam, Parvez N. Guzdar, Rajarshi Roy, 06/02/23, Phys. Rev. E 73, 026219
- Noise-Stabilized Random Attractor, J. M. Finn, E. R. Tracy, W. E. Cooke, A. S. Richardson, 06/02/23, Phys. Rev. E 73, 026220
- Destruction Of Spiral Waves In Chaotic Media, Meng Zhan, Raymond Kapral, 06/02/24, Phys. Rev. E 73, 026224
- Degrading A Defense: Bacteria Use Enzyme To Escape Trap, 06/02/25, Science News, Some bacteria have evolved an enzyme that enables them to escape the body's defenses.
- Hunger For Knowledge: Appetite Hormone May Stimulate Memory, 06/02/25, Science News, A hormone that's been tied to promoting hunger may also play a pivotal role in creating and retrieving memories, according to a new study in mice.
- Smart Shoppers Use Unconscious Tactics, 06/02/25, Science News, Consumers make better decisions about major purchases if they heed the power of their unconscious minds.
- 3D Plasma Shapes Created In Thin Air [[ http://www.newscientist.com/data/images/ns/cms/dn8778/dn8778-1_250.jpg The device has already been used to generate a swarm of virtual butterflies (Image: AIST) ]], David Hambling, 06/02/27, NewScientist.
The device has already been used to generate a swarm of virtual butterflies (Image: AIST)
- Long-Range Interactions And Evolutionary Stability In A Predator-Prey System, Erik M. Rauch, Yaneer Bar-Yam, 06/02/27, Phys. Rev. E 73, 020903(R)
- Structural Origin Of The Colored Reflections From The Black-Billed Magpie Feathers, Jean Pol Vigneron, Jean-Fran?ois Colomer, Marie Rassart, Abigail L. Ingram, Virginie Lousse, 06/02/27
- Scale Invariance In Road Networks, Vamsi Kalapala, Vishal Sanwalani, Aaron Clauset, Cristopher Moore, 06/02/27
- Self-Organized Propagation Patterns From Dynamic Self-Assembly In Monolayers, Josep Claret, Jordi Ign?s-Mullol, Ramon Reigada, Francesc Sagu?s, Joaquim Crusats, 06/02/27, Phys. Rev. E 73, 026225
- Astonishing Life Of A Coalescing Drop On A Free Surface, E. M. Honey, H. P. Kavehpour, 06/02/27, Phys. Rev. E 73, 027301
- Americans Are Cautiously Open to Gas Tax Rise, Poll Shows, Louis Uchitelle, Megan Thee, 06/02/28, NYTimes, Americans overwhelmingly oppose a higher federal gasoline tax, but some would go along with an increase if it reduced global warming or dependence on foreign oil.
- Tortured Logic, Anthony Lagouranis, 06/02/28, NYTimes, (...) never knew what laws applied. Instead, a confusing set of verbal and written orders had supplanted the Geneva Conventions.
- Preferential Attachment of Communities: the Same Principle, But a Higher Level, Peter Pollner, Gergely Palla, Tamas Vicsek, 2006/01/25, arXiv, DOI: cond-mat/0601579
- Optimal Traffic Networks, Marc Barthelemy, Alessandro Flammini, 2006/01/26, arXiv, DOI: physics/0601203
- Geographic Gossip: Efficient Aggregation for Sensor Networks, Alexandros G. Dimakis, Anand D. Sarwate, Martin J. Wainwright, 2006/02/16, arXiv, DOI: cs.IT/0602071
- Modularity and Community Structure in Networks, M. E. J. Newman, 2006/02/17, arXiv, DOI: physics/0602124
- Apple iPod Gets 007 Data Spying Tool: 'Podslurping' Soon To Be All The Rage, I. Thomson, 2006/02/20, vnunet.com
- Mosquito Repellents In Frog Skin, C. R. Williams, B. P. C. Smith, S. M. Best, M. J. Tyler, 2006/02/21, Biology Letters, DOI: 10.1098/rsbl.2006.0448
- There's Something Fishy About Human Brain Evolution, 2006/02/22, ScienceDaily & Natural Sciences and Engineering Research Council
- Great (Taste) Expectations: Study Shows Brain Anticipates Taste, Shifts Gears, 2006/02/22, ScienceDaily & University of Wisconsin-Madison
- Living Taste Cells Produced Outside The Body: Breakthrough Will Lead To New Insights About Sense Of Taste, 2006/02/24, Innovations-report & Monell Chemical Senses Center
- Learning To Love Bacteria: Stanford Scientist Highlights Bugs' Benefits, 2006/02/24, Innovations-report & Stanford University Medical Center
- Engineered Mouse Mimics Cognitive Aspects Of Schizophrenia, 2006/02/24, ScienceDaily & Cell Press
- Bucket Brigades Revisited: Are They Always Effective?, Dieter Armbruster, Esma S. Gel, 2006/07/01, European Journal of Operational Research 172(1):213-229, DOI: 10.1016/10.1016/j.ejor.2004.08.044
- Who, Me? Can Baboons Infer The Target Of Vocalizations?, A. L. Engh - enghsas.upenn.edu, R. R. Hoffmeier, D. L. Cheney, R. M. Seyfarth, Feb. 2006, online 2006/01/18, Animal Behaviour, DOI: 10.1016/j.anbehav.2005.05.009
- Dynamical Complexity Of Discrete-Time Regulatory Networks, R. Lima, E. Ugalde, Jan. 2006, online 2005/11/29, Nonlinearity, DOI: 10.1088/0951-7715/19/1/012
- Thoughts On Modeling Complexity, B. J. West - bruce.j.westus.army.mil, Jan.-Feb. 2006, Online 2006/02/15, Complexity, DOI: 10.1002/cplx.20114
- Significant Life Events And The Shape Of Memories To Come: A Hypothesis, T. J. Shors - shorsrci.rutgers.edu, Mar. 2006, online 2005/11/10, Neurobiology of Learning and Memory, DOI: 10.1016/j.nlm.2005.09.004
- Hardwired Behavior: What Neuroscience Reveals About Morality, L. Tancredi, Nov. 2005, Book Announcement, Cambridge Univ. Press
Ralph Abraham on Complexity Digest, , Calcutta, India, 05/12/27
- An Afternoon with Michael Crichton, Washington, 05/11/06
Illuminating the Shadow of the Future, Ann Arbor, Mi 05/09/23-25
Open Network of Centres of Excellence in Complex Systems - Brainstorming Meeting, Paris, France 05/09/19-23
Complexity, Science & Society Conference 2005, U. Liverpool, UK 2005/09/11-14
ECAL 2005 - VIIIth European Conference on Artificial Life,
Canterbury, Kent, UK 2005/09/5-9
T. Irene Sanders, Executive Director and Founder, The Washington Center for Complexity & Public Policy, 05/08/27, QuickTime video (10:38 min), Podcast
- North American Society for the Psychology of Sport and Physical Activity 2005 Conference, Virtual Conference Network, St. Pete's Beach, Florida, 05/06/09-11
- Understanding Complex Systems - Computational Complexity and Bioinformatics, Virtual Conference Network, Urbana-Champaign, Il, UIUC, 05/05/16-19
- Nonlinearity, Fluctuations, and Complexity, with a celebration of the 65th birthday of Gregoire Nicolis. , Complexity Session, Universite' Libre de Bruxelles, Brussels, Belgium, 05/03/16
- World Economic Forum , Davos, Switzerland, 05/01/26-30
1st European Conference on Complex Systems, Torino, Italy, 04/12/5-7
From Autopoiesis to Neurophenomenology: A Tribute to Francisco Varela (1946-2001), Paris, France, 2004/06/18-20
Evolutionary Epistemology, Language, and Culture, Brussels, Belgium, 04/05/26-28
International Conference on Complex Systems 2004, Boston, 04/05/16-21
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
- Edge Videos
Intl Wkshp and Sem, Dynamics on Complex Networks and Applications, Dresden, Germany, 06/02/06-03/03
Intl Workshop on Ecological Informatics of Chaos and Complex Systems, Tokyo, 06/03/02-03
Catalyt's Complexity Forum, Washington , DC, 06/03/09
2nd Intl Nonlinear Science Conf, Heraklion, Crete, Greece, 06/03/10-12
- EXYSTENCE Course on Complexity in Real-World Systems & Their Simulations: Simulation serving science and decision making in a complex world , Torino, Italy, 06/03/13-25
Work, Dissipation, And Fluctuations In Nonequilibrium Physics, Brussels, Belgium, 06/03/22-25
Spring School in Complexity Science, Southampton, UK, 06/03/29-04/12
ZUMA Advanced Simulation Workshop, Koblenz, April 3-7, 2006
- 18th European Meetings on Cybernetics and Systems Research (EMCSR), Vienna, Austria, 06/04/18-21
5th Intl Joint Conf on Autonomous Agents And Multiagent Systems (AAMAS 2006)
Future University, Hakodate, Japan, )6/05/08-12
- Nonlinearities: from Turbulent to Magic,
Copenhagen, Denmark. 06/05/17-20
- Alife X - The 10th Intl Conf on the Simulation and Synthesis of Living Systems,Bloomington, Indiana, 06/06/03-07
Intl. Conference on Complex Systems Boston, MA, 06/06/25-30
1st Intl Conf on Economic Sciences with Heterogeneous Interacting Agents, Univ of Bologna, Italy, 06/06/15-17
NKS 2006: The Wolfram Science Conference, Washington, D.C., 06/06/16-18
Intl Conf on Complex Systems (ICCS), Boston, Ma, 06/06/25-30
11th Annual Congress of the European College of Sport Science, Lausanne, Switzerland, 06/07/05-08
2006 Genetic And Evolutionary Computation Conference (GECCO-2006),
Seattle, Washington, USA, 06/07/08-12
- Intl Soc for the Systems Sciences
50th Ann Conf - Complexity, Democracy & Sustainability, Sonoma, California, 06/07/09-14
5th World Congress of Biomechanics, Munich, Germany, 06/07/29-08/04
50th Anniversary Summit of AI, Monte Verita, Switzerland, 06/07/09-14
FIAS Summer School - Theoretical Neuroscience & Complex Systems, Frankfurt/Main, Germany, 06/08/05-27
2006 Intl Conf on Nonlinear Science and Complexity, Beijing, China, 06/08/07-12
Symmetry Festival 2006, Symmetry in Art and Science Education, Budapest, Hungary, 06/08/12-18
6th International Conference on Intelligent Virtual Agents, Marina Del Rey, Ca, U.S.A., 06/08/21-23
- World Conference on Social Simulation (WCSS-06) , Kyoto, Japan, 06/08/21-25
7th Intl Symposium on Knowledge and Systems
Sciences (KSS'2006), Beijing, 06/09/22-25.
European Conference on Complex Systems 2006 (ECCS'06), Oxford, England, 06/09/25-29
FROM ANIMALS TO ANIMATS 9, The Ninth Intl Conf on the SIMULATION OF ADAPTIVE BEHAVIOR (SAB'06), Roma, Italy, 06/09/25-30
6th Intl Conf on Simulated Evolution and Learning , Hefei,
3rd International Workshop on Complexity and Philisophy, Stellenbosch, South Africa, 07/02/22-23
Call for Papers - Course/Book Announcements
- Chaos and Complexity
Resources for Students and Teachers, 06/03/01
MSc Complexity Science: Systems Thinking from New Biology to Novel Computation, Southampton, UK
Volume Four Complexity and Knowledge Management: Understanding the Role of Knowledge in the Management of Social Networks, ISCE Managing the Complex Book Series
- New Issue of
Emergence: Complexity & Organization (E:CO), Volume 7 Numbers 3 & 4, 2005
Special Double Issue: Complexity and Storytelling
Guest Editors: Ken Baskin & David Boje was published online.