Neurdon TITLE - site.php BrainGate neural interface system reaches 1,000-day performance milestone An investigational implanted system being developed to translate brain signals toward control of assistive devices has allowed a woman with paralysis to accurately control a computer cursor at 2.7 years after implantation, providing a key demonstration that neural activity can be read out and converted into action for an unprecedented length of time. PROVIDENCE, R.I. [Brown University] — Demonstrating an important milestone for the longevity and utility of implanted brain-computer interfaces, a woman with tetraplegia using the investigational BrainGate* system continued to control a computer cursor accurately through neural activity alone more than 1,000 days after receiving the BrainGate implant, according to a team of physicians, scientists, and engineers developing and testing the technology at Brown University, the Providence VA Medical Center, and Massachusetts General Hospital (MGH). From fundamental neuroscience to clinical utility Moving forward About the BrainGate collaboration
Go Behind the Scenes to Watch How Heather Dewey-Hagborg Creates Portraits with Found DNA Just a few weeks ago we covered the amazing 3D-printed portraits created by artist Heather Dewey-Hagborg, who uses genetic clues from found DNA to determine an estimation of what that person might look like. In this short documentary filmed by TED’s Kari Mulholland, we learn a lot more about what goes on behind the scenes as Dewey-Hagborg utilizes the facilities at Genspace in New York to create each of her DNA portraits. Perception puzzles, Visual Perception, Optical illusions and Paradoxes This page illustrates that our visual perception cannot always be trusted. The components of an object can distort the perception of the complete object. Our mind is the final arbiter of truth. The Parthenon Optical illusions have been studied for millenia. Perpetually ascending staircase. The red squares are the same color in the upper part and in the lower part of the "X" The diagonal lines are parallel. There are no gray spots at the corners of the squares. Stairway between corners of a flat square. You can go from corner A to corner B by climbing the stairs or by going around a level plane. The rows of black and white squares are all parallel. Children's Activity Project Color the elephant with crayons or colored pencils making sure to stay within the lines. Click the image to display it in a new page for printing. Impossible triangle. The radiating lines influence our perception of the parallel lines. The center circles are both the same size. The Vertical lines are both the same length.
La chromatographie Auteurs : Ali Ladram, Gilles Camus Article publié le : 15 mai 2012 I- Présentation de la technique La chromatographie est une technique séparative analytique et/ou préparative. Elle consiste à faire migrer les constituants à séparer sur une phase stationnaire immobile à l'aide d'une phase mobile liquide ou gazeuse de nature différente. A partir de ce principe très général, il existe de très nombreux types de chromatographie en fonction de la nature de la phase stationnaire, de la nature de la phase mobile, et de la nature des interactions entre ces phases et les molécules à purifier. Cet article présente les principaux types de chromatographie, leur principe séparatif, les conditions générales de mises en oeuvre, et les principales indications d'utilisation. II- La chromatographie d'exclusion Ce type de chromatographie, également appelé tamisage moléculaire ou gel-filtration, vise à séparer les molécules en fonction de leur masse moléculaire bien que la forme intervienne également.
Geekologie - Gadgets, Gizmos, and Awesome George Church Explains How DNA Will Be Construction Material of the Future George Church, 58, is a pioneer in synthetic biology, a field whose aim is to create synthetic DNA and organisms in the laboratory. During the 1980s, the Harvard University professor of genetics helped initiate the Human Genome Project that created a map of the human genome. In addition to his current work in developing accelerated procedures for sequencing and synthesizing DNA, he has also been involved in the establishing of around two dozen biotech firms. SPIEGEL recently sat down with Church to discuss his new tome and the prospects for using synthetic biology to bring the Neanderthal back from exctinction as well as the idea of making humans resistant to all viruses. SPIEGEL: Mr. Church: I think so, but boy there are a lot of parts to that. SPIEGEL: Perhaps because it is banned? Church: That may be true in Germany, but it's not banned all over the world. SPIEGEL: Would cloning a Neanderthal be a desirable thing to do? Church: Well, that's another thing. Church: Yes. Church: Exactly.