Brain Games & Brain Training - Lumosity. Mind-controlled quadcopter takes to the air. (Screenshot by Michelle Starr/CNET Australia) Researchers at the University of Minnesota have designed an interface that allows humans to control a robot using only their thoughts. How close are we getting to actual brain control? It's starting to seem not far off at all. On the more silly end of the spectrum, we've seen robotic ears and tails that respond to brainwaves; but we've also seen more recently a Chilean company that has created a brain interface for designing printable objects, a mind-controlled exoskeleton for helping people walk, even mind-to-mind communication.
A team of researchers at the University of Minnesota has just added another exciting new technology to the list: a quadcopter that can perform feats of aerial agility, controlled entirely by the pilot's thoughts. Using electroencephalography (EEG), a non-invasive cap fitted with 64 electrodes reads the electrical impulses of the brain to control the copter. Check out how the quadcopter flies in the video below. Brain Initiative. Stanford scientists bring clarity to mouse brain. Microarray Data :: Allen Brain Atlas: Human Brain. Zooming in on the human brain. Image.sciencenet.cn/olddata/kexue.com.cn/upload/blog/file/2010/8/2010823145519611330.pdf. RC circuit. A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors driven by a voltage or current source.
A first order RC circuit is composed of one resistor and one capacitor and is the simplest type of RC circuit. RC circuits can be used to filter a signal by blocking certain frequencies and passing others. The two most common RC filters are the high-pass filters and low-pass filters; band-pass filters and band-stop filters usually require RLC filters, though crude ones can be made with RC filters. Introduction[edit] There are three basic, linear passive lumped analog circuit components: the resistor (R), the capacitor (C), and the inductor (L).
This article relies on knowledge of the complex impedance representation of capacitors and on knowledge of the frequency domain representation of signals. Natural response[edit] The simplest RC circuit is a capacitor and a resistor in series. Complex impedance[edit] where and As or . Per. Kirchhoff's circuit laws. Both of Kirchhoff's laws can be understood as corollaries of the Maxwell equations in the low-frequency limit. They are accurate for DC circuits, and for AC circuits at frequencies where the wavelengths of electromagnetic radiation are very large compared to the circuits. Kirchhoff's current law (KCL)[edit] The current entering any junction is equal to the current leaving that junction. i2 + i3 = i1 + i4 This law is also called Kirchhoff's first law, Kirchhoff's point rule, or Kirchhoff's junction rule (or nodal rule). The principle of conservation of electric charge implies that: The algebraic sum of currents in a network of conductors meeting at a point is zero.
Recalling that current is a signed (positive or negative) quantity reflecting direction towards or away from a node, this principle can be stated as: n is the total number of branches with currents flowing towards or away from the node. This formula is valid for complex currents: Uses[edit] Kirchhoff's voltage law (KVL)[edit] Assuming.
Ohm's law. V, I, and R, the parameters of Ohm's law. where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.[3] The law was named after the German physicist Georg Ohm, who, in a treatise published in 1827, described measurements of applied voltage and current through simple electrical circuits containing various lengths of wire. He presented a slightly more complex equation than the one above (see History section below) to explain his experimental results.
In physics, the term Ohm's law is also used to refer to various generalizations of the law originally formulated by Ohm. History In January 1781, before Georg Ohm's work, Henry Cavendish experimented with Leyden jars and glass tubes of varying diameter and length filled with salt solution. Scope . Encyclopedia of computational neuroscience. Green Fluorescent Protein - Cool Uses - Brainbow. Brainbow Never before has a brain been so beautiful. Jeff Lichtman and Joshua Sanes, researchers at the Harvard Brain Center, have created transgenic mice with fluorescent multicolored neurons. The photographs of the mouse brains that appear in the November 1, 2007 issue of Nature could be housed in the Museum of Modern Art or could be used to decorate Joseph's technicolored dream coat. But it is not their colorful splendor that makes these genetically modified mice so amazing. The mice created by a genetic strategy termed "brainbow" will have a similar effect on neuroscience as Google Earth had on cartography.
In the Brainbow mice, the Harvard researchers have introduced genetic machinery that randomly mixes green, cyan and yellow fluorescent proteins in individual neurons thereby creating a palette of ninety distinctive hues and colors. I can't wait for a three dimensional multicolored atlas of the brain or a Google Brain site that is as beautiful as it is useful. Home | Janelia Farm Research Campus. Human Connectome Project | Mapping the human brain connectivity. Connectome: How the Brain's Wiring Makes Us Who We Are: Sebastian Seung: 9780547678597: Amazon.com.