Erosion insulaire et mouvements de versants, risques induits et modes de prévention

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Détails bibliographiques
Publié dans:	Géosciences No 14
Auteur principal:	Lorion, David.
Autres auteurs:	Unterner, Robert., Nédellec, Jean-Louis.
Support:	Article de revue
Langue:	Français
Publié:	2011.
Sujets:	Articles de périodiques
Résumé:	La majorité des départements et territoires de l'outre-mer français est exposé à des risques géologiques gravitaires (glissements de terrains, chute de blocs) pouvant affecter gravement les intérêts humains et naturels de ces régions très vulnérables. Les risques sont aggravés par l'existence de reliefs très escarpés, de terrains souvent altérés et par un climat chaud aux épisodes pluvieux intenses. Face à un accroissement potentiel de la menace, la prévention de ces risques nécessite l'étude et une connaissance approfondie de ces phénomènes.
Lien:	Dans: Géosciences

BU Sciences

	Localisation	Cote	Statut
n° 14 (2011)	Archives	570 RS GEO	Dispo. du n° : voir "Lien"

foreach (glob($this->path . "/sess_*") as $filename) { if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); } } return true; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data) { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, "w")) { $return = fwrite($handle, $data); fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message. echo 'Cannot write session to ' . $sessFile . "\n"; return false; } }

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data) { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data); }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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Erosion insulaire et mouvements de versants, risques induits et modes de prévention

BU Sciences

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