Personal and Historical Perspectives of Hans Bethe Amplituhedron An amplituhedron is a geometric structure that enables simplified calculation of particle interactions in some quantum field theories. In planar N = 4 supersymmetric Yang–Mills theory, an amplituhedron is defined as a mathematical space known as the positive Grassmannian. The connection between the amplituhedron and scattering amplitudes is at present a conjecture that has passed many non-trivial checks, including an understanding of how locality and unitarity arise as consequences of positivity. Research has been led by Nima Arkani-Hamed. Edward Witten described the work as “very unexpected" and said that "it is difficult to guess what will happen or what the lessons will turn out to be. Description[edit] Using twistor theory, BCFW recursion relations involved in the scattering process may be represented as a small number of twistor diagrams. Implications[edit] See also[edit] References[edit] Notes[edit] Bibliography[edit] External links[edit]
Know The Score - Nine Inch Nails sheet music (and more) Since there is no available, published Nine Inch Nails sheet music, this webpage has been created by a fan with the ability to score by ear for other fans eager to analyze and even perform works by Nine Inch Nails from sheet music. As more works are transcribed or arranged, they will be posted. Please note that many sample-based Nine Inch Nails tracks are very difficult to transcribe in manuscript format, or do not contain enough melodic/harmonic lines to warrant producing sheet music. If you are interested in a track that is largely guitar-based, you would be better off searching Google for a NIN guitar tabs page. As is often the case in the process of scoring by ear, errors may occur. Finally, suggestions and requests are always welcome. For any further information, please contact melissa@mormolyke.com
How The Human Brain Creates Consciousness Scientific talks can get a little dry, so I try to mix it up. I take out my giant hairy orangutan puppet, do some ventriloquism and quickly become entangled in an argument. I’ll be explaining my theory about how the brain — a biological machine — generates consciousness. Kevin, the orangutan, starts heckling me. ‘Yeah, well, I don’t have a brain. But I’m still conscious. How to Feel About Space and Time Maybe Not Existing New research, which turns out to not really be all that new, suggests that space and time do not exist. The research also suggests that a jewel (an “amplituhedron”) is the center of our universe and that from said jewel every feature of our known reality can be quantified. This is crazy, right? To find out, I spoke with Jacob Bourjaily, a theoretical physicist at Harvard who is closely familiar and very much involved with this strand of research. Yeah. Space and time may not exist. So we’ve known for a long time that these ideas need to be modified, but it has never been clear how to modify the standard tools. The “amplitudehedron” research is related to this indirectly because it provides a complete reformulation of the standard toolbox—one that is mathematically identical to the traditional one, but one for which locality and unitarity arise indirectly. Considering that the new ideas reproduce exactly the same predictions as old-fashioned ones, you may wonder why anyone cares.
Atoms Reach Record Temperature, Colder than Absolute Zero Absolute zero is often thought to be the coldest temperature possible. But now researchers show they can achieve even lower temperatures for a strange realm of "negative temperatures." Oddly, another way to look at these negative temperatures is to consider them hotter than infinity, researchers added. This unusual advance could lead to new engines that could technically be more than 100 percent efficient, and shed light on mysteries such as dark energy, the mysterious substance that is apparently pulling our universe apart. An object's temperature is a measure of how much its atoms move — the colder an object is, the slower the atoms are. Bizarro negative temperatures To comprehend the negative temperatures scientists have now devised, one might think of temperature as existing on a scale that is actually a loop, not linear. With positive temperatures, atoms more likely occupy low-energy states than high-energy states, a pattern known as Boltzmann distribution in physics.
DNA molecules can 'teleport', Nobel Prize winner claims A Nobel Prize winning biologist has ignited controversy after publishing details of an experiment in which a fragment of DNA appeared to ‘teleport’ or imprint itself between test tubes. According to a team headed by Luc Montagnier, previously known for his work on HIV and AIDS, two test tubes, one of which contained a tiny piece of bacterial DNA, the other pure water, were surrounded by a weak electromagnetic field of 7Hz. Eighteen hours later, after DNA amplification using a polymerase chain reaction, as if by magic the DNA was detectable in the test tube containing pure water. Oddly, the original DNA sample had to be diluted many times over for the experiment to work, which might explain why the phenomenon has not been detected before, assuming that this is what has happened. The phenomenon might be very loosely described as 'teleportation' except that the bases project or imprint themselves across space rather than simply moving from one place to another. What does all of this mean?
Bloodlust Métal | Editions John Doe First Google Glass App for Sex Sees Everything (Yes, Everything) It was bound to happen: A developer claims that he built the first Google Glass app designed for sex. No, not porn — sex. Sex With Glass is designed to let partners share their point of view with each other to "experience sex like never before." The idea is that both parties will don Glass for the encounter, and the app will send a live video stream to the other person's display upon the command, "OK, Glass, it's time," letting them see what they see in real time. You stop the stream with the words, "OK, Glass, pull out," according to the app's website. The site claims the app will also be able to dim room lights and play mood music, presumably with home automation, as well as suggest new sexual positions with the words, "OK, Glass, give me ideas." The developer is also working on an accompanying iPhone app called Glance, which will let users switch the point of view to the iPhone's camera to see the "whole picture." Add to that concerns about privacy.
That’s not autism: It’s simply a brainy, introverted boy I have followed William in my therapy practice for close to a decade. His story is a prime example of the type of brainy, mentally gifted, single-minded, willful boys who often are falsely diagnosed with autism spectrum disorder when they are assessed as young children. This unfortunate occurrence is partly due to defining autism as a “spectrum disorder,” incorporating mild and severe cases of problematic social communication and interaction, as well as restricted interests and behavior. Jacqueline, William’s mother, realized that he was a quirky baby within weeks of his birth. Some normal developmental milestones did not apply to William. When William encountered an interesting object or event as a toddler, he became so captivated by it that he completely ignored the people around him. By age three, William began developing a passionate interest in a range of adult-like topics. Steve, the lovable host of the children’s TV program “Blue’s Clues,” became an idol for William. Dr.
The mention of “spin” of a particle is one that... - Say It With Science Fluid Experiments Support Deterministic “Pilot-Wave” Quantum Theory For nearly a century, “reality” has been a murky concept. The laws of quantum physics seem to suggest that particles spend much of their time in a ghostly state, lacking even basic properties such as a definite location and instead existing everywhere and nowhere at once. Only when a particle is measured does it suddenly materialize, appearing to pick its position as if by a roll of the dice. This idea that nature is inherently probabilistic — that particles have no hard properties, only likelihoods, until they are observed — is directly implied by the standard equations of quantum mechanics. But now a set of surprising experiments with fluids has revived old skepticism about that worldview. The experiments involve an oil droplet that bounces along the surface of a liquid. Particles at the quantum scale seem to do things that human-scale objects do not do. Magical Measurements Bottom: Akira Tonomura/Creative Commons Some physicists now disagree. Riding Waves The neglect continues.