Measurement of the polarization of $\Lambda^{0}, \bar \Lambda^{0}, \Sigma^{+}$ and $\Xi^{-}$ produced in a $\Sigma^{-}$ beam of 330 GeV/c

Internet at the school change the way to see the documentation and the role of the school libraries. If the practices of the school librarian always dependent on multiple factors could be controlled - before the Web - today it is necessary to think the organization of documentation and its actors in a more complex way in order to deliver practices in response to new stakes of the « information society ».