14 APR 2012 by ideonexus

 The Matter / Antimater Imbalance in the Universe

Physicists have long pondered the problem and may have an answer. It seems that just before the universe was one millisecond old, matter and antimatter annihilated each other in a sweeping extinction. But a tiny asymmetry was built into the universe so that matter dominated over antimatter by one part out of 100 billion. Why the built-in asymmetry? In the first 100 billion-billion-billionth of a second of the universe's history, particles called X particles and their antiparticles were create...
Folksonomies: physics antimatter matter
Folksonomies: physics antimatter matter
  1  notes

In less than the first second of the Universe's existence, 1/100 billionth of the matter was left over from the annihilation with antimatter.

28 MAY 2011 by ideonexus

 Can a Machine Die?

"Die? Can a machine die?" "I can cease to exist, sir. Call it by whatever word you wish. I am old. Not one sentient being in the Galaxy that was alive when I was first given consciousness is still alive today; nothing organic; nothing robotic. Even I myself lack continuity." "In what way?" "There is no physical part of my body, sir, that has escaped replacement, not only once but many times. Even my positronic brain has been replaced on five different occasions. Each time the contents of m...
  1  notes

Not in the sense in which humans die, but a machine will eventually become so overwhelmed with ideas that it will cease to function through indecision.