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Détails bibliographiques
Auteur principal:	Leonardo José Rueda
Format:	Artículo científico
Langue:	es
Publié:	Universidad Tecnológica de Pereira 2007
Sujets:	Ingeniería Simulación Modelamiento Dinámica Urbana Crecimiento Urbano Autómatas Celulares
Accès en ligne:	https://www.redalyc.org/articulo.oa?id=84934071
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Table des matières:

Modelamiento inicial de ciudades de paises en via de desarrollo, utilizando dinámica de sistemas Leonardo José Rueda Dewar Willmer Rico Ingeniería Simulación Modelamiento Dinámica Urbana Crecimiento Urbano Autómatas Celulares El propósito de este estudio es identificar los beneficios reales ofrecidos por lastécnicas de modelamiento y simulación (Autómatas Celulares y Dinámica deSistemas) en el mejoramiento de la planificación y toma de decisiones de losgobiernos de los países en vías de desarrollo respecto del crecimiento de susciudades. Para ello se analiza el caso específico en la ciudad de Pamplona(Colombia), una ciudad que ha experimentado un crecimiento importante en supoblación debido a circunstancias particulares, influenciada por las nociones dedesarrollo implícitas en los modelos de crecimiento en general y las ideas de suspropios gobiernos. 2007 artículo científico 0122-1701 https://www.redalyc.org/articulo.oa?id=84934071 es http://www.redalyc.org/revista.oa?id=849 Scientia Et Technica application/pdf Universidad Tecnológica de Pereira Scientia Et Technica (Colombia) Num.34 Vol.XIII

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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