The self-organisation of collective behaviours often manifests as dramatic patterns of emergent large-scale order. This is true for relatively “simple” entities such as microbial communities and robot “swarms,” through to more complex self-organised systems such as those displayed by social insects, migrating herds, and many human activities. The principle of stigmergy describes those self-organised phenomena that emerge as a consequence of indirect communication between individuals of the group through the generation of persistent cues in the environment. Interestingly, despite numerous examples of multicellular behaviours of bacteria, the principle of stigmergy has yet to become an accepted theoretical framework that describes how bacterial collectives self-organise. Here we review some examples of multicellular bacterial behaviours in the context of stigmergy with the aim of bringing this powerful and elegant self-organisation principle to the attention of the microbial research community.
Bacterial Stigmergy: An Organising Principle of Multicellular Collective Behaviours of Bacteria Erin S. Gloag, Lynne Turnbull, and Cynthia B. Whitchurch
Perhaps no single person did more to popularize Zen Buddhism in the West than Alan Watts. In a sense, Watts prepared U.S. culture for more traditionally Zen teachers like Soto priest Suzuki Roshi, whose lineage continues today, but Watts did not consider himself a Zen Buddhist.
Massimo Banzi helped invent the Arduino, a tiny, easy-to-use open-source microcontroller that's inspired thousands of people around the world to make the coolest things they can imagine -- from toys to satellite gear. Because, as he says, "You don't need anyone's permission to make something great."
A post-apocalyptic Earth, emptied of humans, seems like the stuff of science fiction TV and movies. But in this short, surprising talk, Lord Martin Rees asks us to think about our real existential risks — natural and human-made threats that could wipe out humanity. As a concerned member of the human race, he asks: What’s the worst thing that could possibly happen?
We reached a little milestone this week. Our big list of Free Online Courses now features 1,000 courses from top universities. Let's quickly break things down for you: The list lets you download audio & video lectures from schools like Stanford, Yale, MIT, Oxford and Harvard.
By Adiel Gavish "What the industrial age has done is take life away from the planet and turn it into goods and services," Paul Hawken stated at the 2014 VERGE Conference in San Francisco this past December. The annual event put on by Joel Makower, a former Biomimicry 3.8 Board Member and GreenBiz.com brings corporations…
When electrons or atoms or individuals or societies interact with one another or their environment, the collective behavior of the whole is different from that of its parts. We call this resulting behavior emergent. Emergence thus refers to collective phenomena or behaviors in complex adaptive systems that are not present in their individual parts.
By David Pines, Co-Founder in Residence, Santa Fe Institute
The most exciting hypothesis in cognitive science right now is the theory that cognition is embodied. Like all good ideas in cognitive science, however, embodiment immediately came to mean six different things. The most common definitions involve the straightforward claim that ‘states of the body modify states of the mind’. However, the implications of embodiment are actually much more radical than this. If cognition can span the brain, body and the environment, then the ‘states of mind’ of disembodied cognitive science won’t exist to be modified. Cognition will instead be an extended system assembled from a broad array of resources. Taking embodiment seriously therefore requires both new methods and theory. Here we outline four key steps that research programmes should follow in order to fully engage with the implications of embodiment. The first step is to conduct a task analysis, which characterises from a first person perspective the specific task that a perceiving-acting cognitive agent is faced with. The second step is to identify the task-relevant resources the agent has access to in order to solve the task. These resources can span brain, body and environment. The third step is to identify how the agent can assemble these resources into a system capable of solving the problem at hand. The last step is to test the agent’s performance to confirm that agent is actually using the solution identified in step 3. We explore these steps in more detail with reference to two useful examples (the outfielder problem and the A-not-B error), and introduce how to apply this analysis to the thorny question of language use. Embodied cognition is more than we think it is, and we have the tools we need to realise its full potential.
Are individuals "hardwired" to be either liberal or conservative? A new book from researchers at Rice University and the University of Nebraska-Lincoln (UNL) suggests that this may in fact be the case.
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