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Bibliographic Details
Main Author:	Carlos Mallorquín
Format:	Artículo científico
Language:	es
Published:	Universidad Nacional Autónoma de México 2005
Subjects:	Multidisciplinarias (Ciencias Sociales)
Online Access:	https://www.redalyc.org/articulo.oa?id=32105205
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Raúl Prebisch y el deterioro de la tesis de los términos de intercambio Carlos Mallorquín Multidisciplinarias (Ciencias Sociales) El artículo describe la evolución de una etapa intelectual relativamente desconocida del economista argentino Raúl Prebisch, que por lo general aparece mencionado conjuntamente con H. Singer, como el teórico del deterioro de los términos del intercambio que sufren los países del Tercer Mundo vis à vis los países desarrollados. Aquí se intenta demostrar que las ideas que Prebisch desarrollaba antes de su periodo como director de la Comisión Eco-nómica para América Latina (1949) son mucho más parecidas a las que empezó a reconstruir durante el segundo lustro de la década de 1975 y que culminaron en el libro Capitalismo periférico, aparecido en 1981. 2005 artículo científico 0188-2503 https://www.redalyc.org/articulo.oa?id=32105205 es http://www.redalyc.org/revista.oa?id=321 Revista Mexicana de Sociología application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Sociología (México) Num.2 Vol.67

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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