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Bibliographic Details
Main Author:	Luis R. Almeida
Format:	Artículo científico
Language:	es
Published:	Universidad Autónoma Metropolitana 2003
Subjects:	Sociología
Online Access:	https://www.redalyc.org/articulo.oa?id=32511705
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Problemática y alternativas de financiamiento para proyectos eléctricos Luis R. Almeida Sociología ¿Cuál sería el contexto más adecuado para instrumentar una políticade desarrollo sostenido del Sistema Eléctrico Nacional? ¿Seríael sistema actual de relativa estabilidad o el diseñado por el mercadoeléctrico con sus beneficios, pero también con sus fluctuacionesy vulnerabilidad inherentes o bien una estructura financiera balanceadacon esfuerzos conjuntos públicos y privados? ¿Qué sectorpodría garantizar costos reducidos y evitar manipulaciones del mercado?La sociedad tiene la última palabra. 2003 artículo científico 0186-1840 https://www.redalyc.org/articulo.oa?id=32511705 es http://www.redalyc.org/revista.oa?id=325 El Cotidiano application/pdf Universidad Autónoma Metropolitana El Cotidiano (México) Num.117 Vol.19

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * 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): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($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.

// 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 0; } /** * 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, $data): bool { if ($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): bool; }

* * @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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