02-15-2011, 05:18 AM
an international group of astronomers and physicists has found that rotating black holes leave an imprint on passing radiation that should be detectable using today's most sensitive radio telescopes. observing this signature, they say, could tell us more about how galaxies evolve and provide a test of albert einstein's general theory of relativity.
[moderator note: the science channel has various programs on this subject-great link weboy!]
02-16-2011, 10:40 AM
Mathematicians propose periodic table of shapes
be well, be love.
mathematicians propose periodic table of shapes
thursday, 17 february 2011
london: mathematicians have embarked on a three-year project to create their own version of the periodic table that will provide a vast directory of all the possible shapes in the universe across three, four and five dimensions.
linking shapes together in the same way as the periodic table links groups of chemical elements, the new table should provide a resource that mathematicians, physicists and other scientists can use for calculations and research in a range of areas, including computer vision, number theory, and theoretical physics.
“the periodic table is one of the most important tools in chemistry. our work aims to create a directory that lists all the geometric building blocks and breaks down each one’s properties using relatively simple equations,” said project leader alessio corti, from the department of mathematics at imperial college london.
02-17-2011, 02:27 AM
Particles That Flock: Strange Synchronization Behavior at the Large Hadron Collider
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particles that flock: strange synchronization behavior at the large hadron collider
scientists at the large hadron collider are trying to solve a puzzle of their own making: why particles sometimes fly in sync
by amir d. aczel | february 11, 2011
in its first six months of operation, the large hadron collider near geneva has yet to find the higgs boson, solve the mystery of dark matter or discover hidden dimensions of spacetime. it has, however, uncovered a tantalizing puzzle, one that scientists will take up again when the collider restarts in february following a holiday break. last summer physicists noticed that some of the particles created by their proton collisions appeared to be synchronizing their flight paths, like flocks of birds. the findings were so bizarre that “we’ve spent all the time since [then] convincing ourselves that what we were see ing was real,” says guido tonelli, a spokesperson for cms, one of two general-purpose experiments at the lhc.
the effect is subtle. when proton collisions result in the release of more than 110 new particles, the scientists found, the emerging particles seem to fly in the same direction. the high-energy collisions of protons in the lhc may be uncovering “a new deep internal structure of the initial protons,” says frank wilczek of the massachusetts institute of technology, winner of a nobel prize for his explanation of the action of gluons. or the particles may have more interconnections than scientists had realized. “at these higher energies [of the lhc], one is taking a snapshot of the proton with higher spatial and time resolution than ever before,” wilczek says.
02-17-2011, 02:34 AM
this limit corresponds to energy not, vert, similar1043 gev which is 39 orders of magnitude larger than the maximum beam energy currently available at the lhc. thus, if torsion exists and the ecks theory of gravity is correct, the lhc cannot produce micro black holes.
what black holes teach about strongly coupled particles
02-24-2011, 12:00 AM
in 2003, astronomers detected the deepest note ever generated in the cosmos, a b♭, after 53 hours of chandra observations. no human will actually hear the note, because it is 57 octaves below the keys in the middle of a piano. the sound waves appear to be generated by the inflation of bubbles of relativistic plasma by the central active galactic nucleus in ngc 1275. they are visible as ripples in the x-ray band using chandra x-ray observatory, as the x-ray brightness of the intracluster medium that fills the cluster is strongly dependent on the density of the plasma.
02-24-2011, 05:57 AM
recently a technical test of andrea rossi's ni-h reactor (energy catalyzer) was conducted in which a minimum of 15 kw of heat was produced continuously for 18 hours, observed by dr. joseph levi and others
andrea rossi claims to have developed a practical and commercial ready cold fusion technology that could cost around 1 cent per kilowatt hour; with the first 1 mw plant completed later this year, comprised of 125 units ganged together. it utilizes nano-nickel powder, hydrogen gas, and undisclosed (for proprietary reasons) catalysts under pressure to produce large amounts of energy.
the test took place at the university of bologna.
04-06-2011, 03:41 PM
us atom smasher may have found new force of nature
"physicists will announce wednesday that data from a major us atom smasher lab may have revealed a new elementary particle, or potentially a new force of nature, one of the researchers told afp.
the discovery is believed to relate to mass and how objects obtain it -- a persistent riddle to experts and one of the most sought-after answers in all of physics."
04-11-2011, 10:27 AM
be well, be love.
physicists discover new way to visualize warped space and time
simulating extreme spacetimes
pasadena, calif.—when black holes slam into each other, the surrounding space and time surge and undulate like a heaving sea during a storm. this warping of space and time is so complicated that physicists haven't been able to understand the details of what goes on—until now.
"we've found ways to visualize warped space-time like never before," says kip thorne, feynman professor of theoretical physics, emeritus, at the california institute of technology (caltech).
by combining theory with computer simulations, thorne and his colleagues at caltech, cornell university, and the national institute for theoretical physics in south africa have developed conceptual tools they've dubbed tendex lines and vortex lines.
two doughnut-shaped vortexes ejected by a pulsating black hole. also shown at the center are two red and two blue vortex lines attached to the hole, which will be ejected as a third doughnut-shaped vortex in the next pulsation.
[credit: the caltech/cornell sxs collaboration]
using these tools, they have discovered that black-hole collisions can produce vortex lines that form a doughnut-shaped pattern, flying away from the merged black hole like smoke rings. the researchers also found that these bundles of vortex lines—called vortexes—can spiral out of the black hole like water from a rotating sprinkler.
the researchers explain tendex and vortex lines—and their implications for black holes—in a paper that's published online on april 11 in the journal physical review letters.
tendex and vortex lines describe the gravitational forces caused by warped space-time. they are analogous to the electric and magnetic field lines that describe electric and magnetic forces.
tendex lines describe the stretching force that warped space-time exerts on everything it encounters. "tendex lines sticking out of the moon raise the tides on the earth's oceans," says david nichols, the caltech graduate student who coined the term "tendex." the stretching force of these lines would rip apart an astronaut who falls into a black hole.
vortex lines, on the other hand, describe the twisting of space. if an astronaut’s body is aligned with a vortex line, she gets wrung like a wet towel.
04-11-2011, 12:34 PM
turning a vacuum into a superconductor could be as simple as zapping it with a super-powerful magnet.
that's according to maxim chernodub of the university of tours in france, who believes powerful magnetic fields could pluck charged particles out of the vacuum of space and set them flowing as a current that never encounters any resistance.
04-13-2011, 10:44 AM
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big bang simulated in metamaterial shows time travel is impossible
april 13, 2011 by lisa zyga
big bang model
in the toy big bang model, light rays spread out as a function of time, similar to the expansion of spacetime in a diagram of the real big bang. image credit: smolyaninov and hung.
(physorg.com) -- by observing the way that light moves inside a metamaterial, researchers have reconstructed how spacetime has expanded since the big bang. the results provide a better understanding of why time moves in only one direction, and also suggest that time travel is impossible.
n their study, electrical engineers igor smolyaninov and yu-ju hung from the university of maryland have built a metamaterial by patterning plastic strips on a gold substrate, which they then illuminated with a laser. because the mathematics of electromagnetic spaces (which describe the metamaterial) is similar to the mathematics of general relativity (which describe spacetime), the way light moves in the metamaterial is exactly analogous to the path - or “world line” - of a massive particle in (2+1)-dimensional minkowski spacetime.
as the researchers explained in their study, a big bang event occurs in the metamaterial when the pattern of light rays expands relative to the time-like z-dimension. this instance marks the beginning of cosmological time, which moves forward from the big bang in the direction of the universe’s expansion. after the big bang event, the light rays expand in a non-perfect way, scattered by random defects in the plastic strips until they reach a high-entropy state. this behavior represents the thermodynamic arrow of time, showing that entropy tends to increase in an isolated system.
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