World First Time Machine - Time Paradox 2/2. The Official String Theory Web Site. Quantum Mechanics. The Ultimate Field Guide to Subatomic Particles. This is, for the most part, an accurate article, except for a few statements. "Exactly what makes a fermion a fermion is a bit complicated, but suffice it to say that fermions are all the particles that deal with matter.
So what about the last group of elementary particles, the ones that don't deal with matter? These are the bosons, and they deal with the fundamental forces of the universe. " The statements above can be misinterpreted as suggesting that fermions are defined as particles that deal with matter and bosons are defined as particles that deal with forces. And that is not true. Particles that deal with matter are fermions and particles that carry the fundamental forces are bosons.
What fermions and bosons really are have to do with two apparently unrelated (but actually related) particle properties: spin and statistics. "There are four known bosons" See, this is an example of the misconception I just mentioned. According to special relativity, not general relativity. Alcubierre Warp Drive Time Travel. An Alcubierre Warp Drive stretches spacetime in a wave causing the fabric of space ahead of a spacecraft to contract and the space behind it to expand.
The ship can ride the wave to accelerate to high speeds and time travel. The Alcubierre drive, also known as the Alcubierre metric or Warp Drive, is a mathematical model of a spacetime exhibiting features reminiscent of the fictional "warp drive" from Star Trek, which can travel "faster than light" (although not in a local sense - see below). The key characteristics of the application of Alcubierre warp drives for time control and time travel are presented in the picture below.
This is followed by more detail describing the effect below. Alcubierre Warp Drive Description In 1994, the Mexican physicist Miguel Alcubierre proposed a method of stretching space in a wave which would in theory cause the fabric of space ahead of a spacecraft to contract and the space behind it to expand. Alcubierre Metric Mathematics of the Alcubierre drive. Physical Reality of String Theory Demonstrated. Posted on: Tuesday July 7, 2009.
String theory has come under fire in recent years. Promises have been made that have not been lived up to. Leiden theoretical physicists have now for the first time used string theory to describe a physical phenomenon. Their discovery has been reported this week in 'Science'. Euphoria ‘This is superb. Hot issue Electrons can form a special kind of state, a so-called quantum critical state, that plays a role in high-temperature super-conductivity. Theory of everything This is the first time that a calculation based on string theory has been published in Science, even though the theory is widely known. Quantum soup But now, Zaanen, together with his colleagues Cubrovic and Schalm, are trying to change this situation, by applying string theory to a phenomenon that physicists, including Zaanen, have for the past fifteen years been unable to explain: the quantum-critical state of electrons.
Bridge Puzzle Gateway to more. UK Researchers Using Charles Babbage Robot Head to Develop Emotional Machines. "Charles, I think this is the beginning of a beautiful friendship," Peter Robinson says to the passenger sitting in the car next to him. The passenger is a robot head that Robinson, a professor of computer technology at Cambridge University in England, is using to explore the role of emotions in human-machine interaction. Can computers understand emotions? Can computers express emotions? Can they feel emotions? These are the questions that Robinson and his team at Cambridge's Computer Laboratory want to answer. When people talk to each other, they express their feelings through facial expressions, tone of voice, and body postures. So could we build better computers, robots, and other machines if they could understand and respond to these hidden signals? Robinson's team believe the answer is yes. Charles is a robotic head modeled on Charles Babbage.
Do you agree? Image and video: "The Emotional Computer"/Cambridge University.