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Paul Robertson - Gatinhos

15.06.09

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"Burning walls" may stop black hole formation"

15.06.09

 

Nem de propósito...

 

"Black holes are thought to form when stars of sufficient size collapse creating a force so strong that nothing can oppose it. The result is a region of space with infinite density and a gravitational field so strong that nothing, not even light, can escape.

(...)

The current thinking is that any star 3 or 4 times bigger than the Sun ought to form a black hole in a supernova at the end of its life. Anything smaller than that and the the degeneracy pressure of neutrons, which prevents neutrons being squashed too closely together, can succcessfuly oppose the collapse. Hence the formation of neutron stars.

Now Ilya Royzen from the P.N. Lebedev Physical Institute of the Russian Academy of Sciences in Moscow has put his finger on an even more powerful force at work in supernovas.

He says that quantum chromodynamics predicts that when a collapse overcomes the pressure of neutron degeneracy, another effect comes into play: matter undergoes a phase change.

This change is from a hadronic form to a so-called subhadronic form, which is very different to ordinary matter. In subhadronic form, space is essentially empty. So the phase change creates a sudden reduction in pressure allowing any ordinary matter in the star to implode into this new vacuum. The result is a massive increase in temperature of this matter to 100 MeV or so, creating, what Royzen calls, a "burning wall" within the supernova.

He says it is this"burning wall that stops the formation of a black hole during a supernovas of stars up to about 4 times the mass of the Sun, not just the degeneracy pressure of neutrons.

Now 100 MeV is several orders of magnitude more energy than any theory of supernovas has predicted so far. And that's interesting because it ought to produce very powerful gamma rays.

Strangely enough, the most powerful gamma rays are several orders of magnitude more powerful than can be explained by existing theories of supernovas.

As Royzen says, it's hard to resist making the link. If it stands up, he may have put his finger on the mechanism that finally explains the most powerful gamma ray bursts in the universe and one of the great modern day mysteries of astrophysics."

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Critica ao filme "Girlfriend Experience"

15.06.09

 

"And it is here, in the push away from the predictability of the subject, that the film makes its first stab at lasting importance. A man visits a whore not to become someone else for a time, or sprint away from the boredom of who he really is, but rather to become more of himself. It is in that hotel room, or at that fancy restaurant, that he can explore the person within so needlessly compromised by marriage, family, and work. It is often said that men seek professionals because they can indulge in bizarre sexual rituals that they dare not bring up at home. That this is true need not be debated. But the statement is so rarely carried to its obvious conclusion. However odd the fantasy, it reflects a genuine impulse, and man is best defined by his uncalculated, spontaneous reactions to life’s challenges. When we reflect, ponder, and rationalize, we sand away our identity to such an extent that it seems to exist beyond the shore; something untouchable and inauthentic, as if to be tapped when no one is looking. And for those times — nearly every waking second, if we’re of the average sort — when we are supposedly living our “real” lives, we are in fact living that fantasy so often attributed elsewhere. In fact, we knowingly invent, lie, and deceive more often in the interactions we have come to believe are the precious moments of living. They are anything but."

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Conversas de Café

15.06.09

Será a falta de poder que impede as pessoas de cometer as atrocidades que apregoam em bandos à volta do Correio da Manhã na mesa do café? (capava-o, pendurava-a com uma corda no tecto da escola (?????), corria-o a tiro, só o pénis não cortava-lhe também as mãos, tirava-lhe tudo, é a lista de torturas para hoje)

 

 

da autoria de Vacant Lot

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Godlike

15.06.09

 

Via o Sueco Vociferante

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Insegurança

15.06.09

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O Homem é a sua própria criação

15.06.09

 

Michael Jackson Age Progression (Age 45)

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"Captain America is dead"

15.06.09

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Oh My God, Oh My God, Oh My God!

15.06.09

 

In this image, dense knots of dust in otherwise normal galaxies dim the light of a dark gamma-ray burst (center). The dust absorbs most or all of a burst's visible light but not higher-energy X-rays and gamma rays.

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Numa URSS paralela

15.06.09

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Impressiona o quanto parece um cenário do "Full Metal Alchemist"

15.06.09


Artist: Utagawa Hiroshige II Nationality: Japanese, 1826-1869 Title: A Picture of American Prosperity Date: 1861, Color woodcut. Utagawa Hiroshige II was a traditional Japanese woodblock artist who worked much earlier than other artists included in this exhibition. Completed in 1861, this print was an imaginary scene of America designed by a Japanese artist who had never left Japan. As interest in foreign countries and peoples increased, artists like Hiroshige II created elaborate interior and exterior compositions full of architectural details and costumed foreigners. Factual accuracy was secondary to producing designs that were full of unusual and novel details. Since Japanese were strictly prohibited from traveling abroad during this period, artists had to rely on imported images from all over the world. The inspiration for this print came primarily from an illustration of a castle in Europe included in a London newspaper that was imported to Japan.

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"Real Christians Protest EA's Fake Christian Protest at E3"

15.06.09

 

Mais uma prova de que o marketing é o mais poderoso corrosivo de qualquer sociedade organizada.

Obrigado Marketing.

 

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"Baby's First Internet"

15.06.09

Vejam o resto

 

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