Online Research at the Secondary Level: Access to a World of Information.

Fuente: ERIC Institute of Education Sciences

Saved in:

Bibliographic Details
Main Author:	Jones, Pamela
Format:	Recurso educativo Open Access
Language:	en
Published:	1988
Subjects:	Comparative Analysis Cost Effectiveness Evaluation Criteria High School Students Library Instruction Online Searching Optical Data Disks Research Skills Secondary Education Student Research
Online Access:	Acceder al recurso
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author	Jones, Pamela
author_facet	Jones, Pamela Jones, Pamela
collection	Education Resources Information Center
contents	Online Research at the Secondary Level: Access to a World of Information. Jones, Pamela Comparative Analysis Cost Effectiveness Evaluation Criteria High School Students Library Instruction Online Searching Optical Data Disks Research Skills Secondary Education Student Research Discusses the development of research skills through online searching by secondary school students, and compares online and optical data disk systems. The factors compared include cost, currency, subject areas, number of uses, search time, preparation needed, search methods, help needed, and alternative uses of the equipment. (CLB)
format	Recurso educativo Open Access
id	eric_EJ377813
institution	ERIC Institute of Education Sciences
language	en
publishDate	1988
record_format	eric
spellingShingle	Online Research at the Secondary Level: Access to a World of Information. Jones, Pamela Comparative Analysis Cost Effectiveness Evaluation Criteria High School Students Library Instruction Online Searching Optical Data Disks Research Skills Secondary Education Student Research Online Research at the Secondary Level: Access to a World of Information. Jones, Pamela Comparative Analysis Cost Effectiveness Evaluation Criteria High School Students Library Instruction Online Searching Optical Data Disks Research Skills Secondary Education Student Research Discusses the development of research skills through online searching by secondary school students, and compares online and optical data disk systems. The factors compared include cost, currency, subject areas, number of uses, search time, preparation needed, search methods, help needed, and alternative uses of the equipment. (CLB)
title	Online Research at the Secondary Level: Access to a World of Information.
topic	Comparative Analysis Cost Effectiveness Evaluation Criteria High School Students Library Instruction Online Searching Optical Data Disks Research Skills Secondary Education Student Research
url	https://eric.ed.gov/?id=EJ377813

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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