3-D Fractals Offer Clues to Complex Systems If you came across an animal in the wild and wanted to learn more about it, there are a few things you might do: You might watch what it eats, poke it to see how it reacts, and even dissect it if you got the chance. Mathematicians are not so different from naturalists. Rather than studying organisms, they study equations and shapes using their own techniques. That’s the promise of a new idea from two mathematicians: Laura DeMarco, a professor at Northwestern University, and Kathryn Lindsey, a postdoctoral fellow at the University of Chicago. With polynomials, “everything is defined in the two-dimensional plane,” Lindsey said. The 3-D shapes that they build look strange, with broad plains, subtle bends and a zigzag seam that hints at how the objects were formed. Breaking Out of Two Dimensions In mathematics, several motivating factors can spur new research. Courtesy of Laura DeMarco Laura DeMarco, a professor at Northwestern University. A Fractal Link to Entropy A Folding Strategy
L'impression 3D révolutionne la médecine ? On fait le point En ce mois de janvier 2014, l’impression 3D n’en est qu’encore qu’au temps des espoirs et des promesses. Additiverse vous propose un point sur les projets existants et évolutions médicales qui risquent de changer la médecine moderne, du diagnostique au traitement. Ici, nous n’essaierons pas de répondre aux questions d’éthiques, théologiques, philosophiques inhérentes aux avancées médicales. Nous vous proposons juste de faire un arrêt sur image l’impression 3D médicale en ce début 2014. Le monde de l’impression 3D est tellement riche en déclarations qui relèvent de la science-fiction, que pour beaucoup d’entre nous c’est l’incrédulité qui prend le pas et laisse place à St Thomas et son fameux dicton. L’impression 3D au secours d’un bébé : En octobre 2011, Kaiba Gionfriddo, né en bonne santé dans la ville de Youngstown dans l’état de l’Ohio. En 2011, Anthony Atala, chirurgien présente son projet de pallier au manque d'organe par l'impression d'un rein : Janvier 2014, Fayz Y.
Harvard creates brain-to-brain interface, allows humans to control other animals with thoughts alone This site may earn affiliate commissions from the links on this page. Terms of use. Researchers at Harvard University have created the first noninvasive brain-to-brain interface (BBI) between a human… and a rat. Simply by thinking the appropriate thought, the BBI allows the human to control the rat’s tail. This is one of the most important steps towards BBIs that allow for telepathic links between two or more humans — which is a good thing in the case of friends and family, but terrifying if you stop to think about the nefarious possibilities of a fascist dictatorship with mind control tech. In recent years there have been huge advances in the field of brain-computer interfaces, where your thoughts are detected and “understood” by a sensor attached to a computer, but relatively little work has been done in the opposite direction (computer-brain interfaces). Which brings us neatly onto Harvard’s human-mouse brain-to-brain interface.
Why Do We Count? The abacus is a tool, just like the calculator is a tool. Your smartphone’s calculator app — that’s a tool, too. But are numbers themselves a tool? I spoke to Everett by phone about the book. Craig Fehrman: Are human beings hardwired to think numerically? Caleb Everett: We seem to have some kind of innate predisposition to numbers, but it’s smaller than you’d think. CF: That’s where numbers come in, right? CE: My suspicion is that there were many, many times in history when people realized in an ephemeral way that this quantity is the same as that quantity — that this five, in terms of their fingers, is the same as that five, in terms of goats or sheep. CF: Once a particular culture has numbers, what does that allow? CE: The way our cultures look, and the kinds of technology we have, would be radically different without numbers. Let’s say that two agricultural states in Mesopotamia, more than 5,000 and maybe as many as 8,000 years ago, wanted to trade with each other. CE: Right.
13 Incredible Tech Inventions You Won't Believe You Missed In 2013 | HuffPost Canada The tech world gave us plenty talk about in 2013. We can build smarter robots. We can 3D-print pretty much anything. Tablet wars are still going strong, Snapchat is still a thing, and now we can binge-watch our favorite TV shows in more ways than ever before. Yes, 2013 brought us many amazing innovations that we use every day. But here are some even more incredible ones that you may not have heard about: 1. (YouTube) If everything goes according to Shamees Aden's plan, you may one day never need to buy another pair of running shoes. 2. (YouTube) Like playing with LEGOs, a modular smartphone is a make-it-yourself device consisting of an endoskeleton base and modules that attach to create a custom phone. Motorola has been collaborating on a mission to make these devices a reality with Dave Hakkens, creator of a similar initiative called Phoneblocks, since this past fall. 3. (YouTube) 4. (YouTube) 5. (YouTube) 6. 7. (YouTube) 8. 9. 10. 11. (YouTube ) 12. (Vimeo) 13. (YouTube)
Anonymity in science - ScienceDirect Outline A brief history of anonymous scientistsScientific anonymity todayAnonymity and objectivity?When is anonymity appropriate?References <div pearltreesdevid="PTD175" role="alert" class="alert-message-container"><div pearltreesdevid="PTD176" aria-hidden="true" class="alert-message-body"><span pearltreesdevid="PTD177" style="display: inline-block;" class="Icon IconAlert"><svg pearltreesDevId="PTD178" style="width: 100%; height: 100%;" width="24" height="24" focusable="false" tabindex="-1" fill="currentColor"><path pearltreesDevId="PTD179" fill="#f80" d="M11.84 4.63c-.77.05-1.42.6-1.74 1.27-1.95 3.38-3.9 6.75-5.85 10.13-.48.83-.24 1.99.53 2.56.7.6 1.66.36 2.5.41 3.63 0 7.27.01 10.9-.01 1.13-.07 2.04-1.28 1.76-2.39-.1-.58-.56-1.02-.81-1.55-1.85-3.21-3.69-6.43-5.55-9.64-.42-.52-1.06-.83-1.74-.79z"></path><path pearltreesDevId="PTD180" d="M11 8h2v5h-2zM11 14h2v2h-2z"></path></svg></span><!-- react-text: 58 -->JavaScript is disabled on your browser.
MIT Technology Review: Aggregate Bellies full of microplastic rob baby fish of their basic instincts Larval European perch that has ingested microplastic particles (light-colored spheres on bottom side). Photo by Oona Lönnstedt When exposed to microplastics, baby fish stop eating natural food and prefer consuming the pollutant, according to a report from ecologists at Uppsala University in Sweden. The dietary switch derails the basic instincts of the fish, the researchers found, elevating the likelihood of being caught by predators. “Perch are common and popular recreational fish in Sweden,” said Oona Lönnstedt, an Uppsala ecologist and the project’s leader. If this process takes place in the marine ecosystem, plastics can affect the health of food webs, which include humans as an apex predator. The trend is especially true for young perch, and the cause remains unknown. Microplastics litter the Earth’s oceans. Lönnstedt’s study examined how microplastics influence every stage of European perch development. The consumption of microplastics may reduce energy levels in larval fish.