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November 18 2011


Quantum theorem shakes foundations | Nature News & Comment 2011-11-17

The wavefunction is a real physical object after all, say researchers.

At the heart of the weirdness for which the field of quantum mechanics is famous is the wavefunction, a powerful but mysterious entity that is used to determine the probabilities that quantum particles will have certain properties. Now, a preprint posted online on 14 November1 reopens the question of what the wavefunction represents — with an answer that could rock quantum theory to its core. Whereas many physicists have generally interpreted the wavefunction as a statistical tool that reflects our ignorance of the particles being measured, the authors of the latest paper argue that, instead, it is physically real.

“I don't like to sound hyperbolic, but I think the word 'seismic' is likely to apply to this paper,” says Antony Valentini, a theoretical physicist specializing in quantum foundations at Clemson University in South Carolina.

Valentini believes that this result may be the most important general theorem relating to the foundations of quantum mechanics since Bell’s theorem, the 1964 result in which Northern Irish physicist John Stewart Bell proved that if quantum mechanics describes real entities, it has to include mysterious “action at a distance”.


Reposted byscience science

  • Facebook doesn’t track everybody the same way. It uses different methods for members who have signed in and are using their accounts, members who are logged-off and non-members.
  • The first time you arrive at any page, the company inserts cookies in your browser. If you sign up for an account, it inserts two types of cookies. If you don’t set up an account, it only inserts one of the two types.
  • These cookies record every time you visit another website that uses a Facebook Like button or other Facebook plugin — which work together with the cookies to note the time, date and website being visited. Unique characteristics that identify your computer are also recorded.
  • Facebook keeps logs that record your past 90 days of activity. It deletes entries older than 90 days.
  • If you are logged into a Facebook account, your name, email address, friends and all of the other data in your Facebook profile is also recorded.

  • [...]
    Facebook Reveals its User-Tracking Secrets | 2011-11-17
    Reposted bykrekkwartemalRKfoxbanana
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    Sous les révoltes arabes

    La plupart des commentateurs occidentaux, dont la vision est déformée par l'idéologie du « choc des civilisations » et l'islamophobie ambiante, ont perçu les révoltes arabes comme des « miracles » incompréhensibles. Une multitude d'observateurs décrivent pourtant depuis plusieurs années les transformations profondes qui bouleversent les sociétés arabes et témoignent de leur vitalité, en dépit de la chape de plomb imposée par des États autoritaires. Ces analyses peuvent-elles nous aider à comprendre les événements de l'année 2011 ? C'est la question à laquelle cet article s'efforce de répondre, en s'attachant au cas égyptien, à travers la lecture de Life as Politics d'Asef Bayat.
    Reposted fromcheg00 cheg00

    April 12 2011

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    from Handel's Sacred Drama or Oratorio Jephta

    "In honour of Stuart Burrows' () here is his moving rendition of "Deeper, and deeper still....Waft her, angels.." from Handel's Jephtha (available on the Decca label)." rec ~1960ies

    (the piano part is not mentioned)




    Scene 4


    47. Accompagnato Jephtha
    Deeper, and deeper still, thy goodness, child,
    Pierceth a father's bleeding heart, and checks
    The cruel sentence on my falt'ring tongue.
    Oh, let me whisper it to the raging winds,
    Or howling deserts; for the ears of men
    It is too shocking. Yet have I not vow'd?
    And can I think the great Jehovah sleeps,
    Like Chemosh and such fabled deities?
    Ah no; Heav'n heard my thoughts, and wrote them down;
    It must be so. 'Tis this that racks my brain,
    And pours into my breast a thousand pangs
    That lash me into madness. Horrid thought!
    My only daughter, so dear a child,
    Doom'd by a father! Yes, the vow is past,
    And Gilead hath triumph'd o'er his foes.
    Therefore, tomorrow's dawn... I can no more.




    Scene 1

    Jephtha, Iphis, Priests and Chorus.


    50. Air Jephtha
    Waft her, angels, through the skies,
    Far above yon azure plain,
    Glorious there, like you, to rise,
    There, like you, for ever reign.
    Waft her. . . da capo



    complete libretto from Handel's Sacred Drama or Oratorio Jephta

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