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Detalles Bibliográficos
Autor principal:	R. Isaac-Márquez
Formato:	Artículo científico
Lenguaje:	es
Publicado:	Universidad Juárez Autónoma de Tabasco 2005
Materias:	Agrociencias México Tabasco deforestación uso del suelo estrategias campesinas
Acceso en línea:	https://www.redalyc.org/articulo.oa?id=15404202
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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Estrategias productivas campesinas: un análisis de los factores condicionantes del uso del suelo en el oriente de Tabasco, México R. Isaac-Márquez B de Jong A. Eastmond MD Kantún S Ochoa-Gaona S Hernández Agrociencias México Tabasco deforestación uso del suelo estrategias campesinas El artículo analiza los factores que condicionan el uso del suelo y las estrategias productivas de los campesinos así como las implicaciones que tienen para la conservación de la selva en el oriente de Tabasco. Datos obtenidos mediante la aplicación de una encuesta a campesinos (n=124) de doce comunidades y visitas de campo fueron analizados estadísticamente. Los resultados demuestran que los factores biofísicos, específicamente la geomorfología, son los primeros condicionantes del uso del suelo a una escala regional, mientras que las políticas públicas, el mercado del ganado y la dinámica histórica del uso del suelo parecen dirigir el proceso a una escala local. Se argumenta que el futuro desarrollo de la cobertura del suelo en el oriente de Tabasco dependerá del uso que los campesinos realicen de sus áreas de vegetación secundaria. Los resultados del estudio resaltan la importancia de las políticas de fomento productivo como factores condicionantes para propiciar un uso sustentable del suelo. Se concluye que las circunstancias actuales en la región son favorables para revertir la deforestación siempre y cuando el gobierno impulse y apoye este proceso a través de la instrumentación de programas de largo plazo, de incentivos económicos y asistencia técnica. 2005 artículo científico 0186-2979 https://www.redalyc.org/articulo.oa?id=15404202 es http://www.redalyc.org/revista.oa?id=154 Universidad y Ciencia application/pdf Universidad Juárez Autónoma de Tabasco Universidad y Ciencia (México) Num.42 Vol.21

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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