Lições de Esquerda
Por João Jesus Caetano | Arquivado em Economia, Estados Unidos, Política
27 Setembro, 2008, 14:51 | 1 Comentário
Swing
Por João Jesus Caetano | Arquivado em Estados Unidos
21 Setembro, 2008, 19:05 | Comente
The end of physics as we know it?
Por João Jesus Caetano | Arquivado em Ciência, Geral
14 Setembro, 2008, 16:41 | Comente
Diz-se que se o LHC não encontrar o Higgs ou produzir observáveis previstos pela teoria das cordas, a física entrará em agonia. Não sei: Life is what happens while you are busy making other plans.
Nota de rodapé
Por João Jesus Caetano | Arquivado em Fotografia
3 Setembro, 2008, 18:54 | 1 Comentário
Britney teens
Por João Jesus Caetano | Arquivado em Estados Unidos
3 Setembro, 2008, 18:34 | 1 Comentário
No início do primeiro mandato de George W. Bush, foi promovida uma medida que pretendeu satisfazer as hostes mais conservadoras da base de apoio do GOP. Contrariando as políticas anteriores de Clinton, a administração Bush passou a apoiar financeiramente campanhas de promoção da abstinência sexual de adolescentes e a deixar de financiar aquelas que apelavam à prevenção da gravidez através da contracepção. Na altura, Britney Spears foi a figura escolhida para transmitir a ideia que as adolescentes norte-americanas deveriam esperar pelo casamento para ter sexo. Cinco anos depois, e pela primeira vez desde 1990, a taxa de crianças nascidas de mães adolescentes subiu. O ano passado, voltou a subir novamente. Barack Obama pode afirmar — com a razão toda — que a gravidez da filha teenager de Sarah Palin é um assunto do foro da família da candidata a vice de McCain, mas é impossível mantermo-nos indiferentes à ironia.
Large Hadron Rap
Por João Jesus Caetano | Arquivado em Ciência, Vídeos
2 Setembro, 2008, 08:00 | Comente
por Kate McAlpine, Michigan State University
Twenty-seven kilometers of tunnel under ground
Designed with mind to send protons around
A circle that crosses through Switzerland and France
Sixty nations contribute to scientific advance
Two beams of protons swing round, through the ring they ride
‘Til in the hearts of the detectors, they’re made to collide
And all that energy packed in such a tiny bit of room
Becomes mass, particles created from the vacuum
And then…
LHCb sees where the antimatter’s gone
ALICE looks at collisions of lead ions
CMS and ATLAS are two of a kind
They’re looking for whatever new particles they can find.
The LHC accelerates the protons and the lead
And the things that it discovers will rock you in the head.
We see asteroids and planets, stars galore
We know a black hole resides at each galaxy’s core
But even all that matter cannot explain
What holds all these stars together – something else remains
This dark matter interacts only through gravity
And how do you catch a particle there’s no way to see
Take it back to the conservation of energy
And the particles appear, clear as can be
You see particles flying, in jets they spray
But you notice there ain’t nothin’, goin’ the other way
You say, “My law has just been violated – it don’t make sense!
There’s gotta be another particle to make this balance.”
And it might be dark matter, and for first
Time we catch a glimpse of what must fill most of the known ‘Verse.
Because…
LHCb sees where the antimatter’s gone
ALICE looks at collisions of lead ions
CMS and ATLAS are two of a kind
They’re looking for whatever new particles they can find.
Antimatter is sort of like matter’s evil twin
Because except for charge and handedness of spin
They’re the same for a particle and its anti-self
But you can’t store an antiparticle on any shelf
Cuz when it meets its normal twin, they both annihilate
Matter turns to energy and then it dissipates
When matter is created from energy
Which is exactly what they’ll do in the LHC
You get matter and antimatter in equal parts
And they try to take that back to when the universe starts
The Big Bang – back when the matter all exploded
But the amount of antimatter was somehow eroded
Because when we look around we see that matter abounds
But antimatter’s nowhere to be found.
That’s why…
LHCb sees where the antimatter’s gone
ALICE looks at collisions of lead ions
CMS and ATLAS are two of a kind
They’re looking for whatever new particles they can find.
The LHC accelerates the protons and the lead
And the things that it discovers will rock you in the head.
The Higgs Boson – that’s the one that everybody talks about.
And it’s the one sure thing that this machine will sort out
If the Higgs exists, they ought to see it right away
And if it doesn’t, then the scientists will finally say
“There is no Higgs! We need new physics to account for why
Things have mass. Something in our Standard Model went awry.”
But the Higgs – I still haven’t said just what it does
They suppose that particles have mass because
There is this Higgs field that extends through all space
And some particles slow down while other particles race
Straight through like the photon – it has no mass
But something heavy like the top quark, it’s draggin’ its ***
And the Higgs is a boson that carries a force
And makes particles take orders from the field that is its source.
They’ll detect it….
LHCb sees where the antimatter’s gone
ALICE looks at collisions of lead ions
CMS and ATLAS are two of a kind
They’re looking for whatever new particles they can find.
Now some of you may think that gravity is strong
Cuz when you fall off your bicycle it don’t take long
Until you hit the earth, and you say, “Dang, that hurt!”
But if you think that force is powerful, you’re wrong.
You see, gravity – it’s weaker than Weak
And the reason why is something many scientists seek
They think about dimensions – we just live in three
But maybe there are some others that are too small to see
It’s into these dimensions that gravity extends
Which makes it seem weaker, here on our end.
And these dimensions are “rolled up” – curled so tight
That they don’t affect you in your day to day life
But if you were as tiny as a graviton
You could enter these dimensions and go wandering on
And they’d find you…
When LHCb sees where the antimatter’s gone
ALICE looks at collisions of lead ions
CMS and ATLAS are two of a kind
They’re looking for whatever new particles they can find.
The LHC accelerates the protons and the lead
And the things that it discovers will rock you in the head.
-
Subscrever
-
Eleições 2008
