Stop the Technology, I Want to Get off: Tips and Tricks for Media Selection and Acquisition

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Laskowski, Mary S.
Format:	Recurso educativo Open Access
Language:	en
Published:	2004
Subjects:	Media Selection Information Technology Technological Literacy Selection Tools Library Development Library Materials Barriers Performance Factors Information Sources Video Technology
Online Access:	Acceder al recurso
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author	Laskowski, Mary S.
author_facet	Laskowski, Mary S. Laskowski, Mary S.
collection	Education Resources Information Center
contents	Stop the Technology, I Want to Get off: Tips and Tricks for Media Selection and Acquisition Laskowski, Mary S. Media Selection Information Technology Technological Literacy Selection Tools Library Development Library Materials Barriers Performance Factors Information Sources Video Technology Media selection and acquisition is highly dependent on a number of variables, perhaps the most important of which is changing technologies. New technology is a wonderful and frightening thing, with a high level of impact on media collection development. New technologies can improve sound and visual quality, but can also play havoc with established collections and budgets. Availability of various media formats and titles is a very fluid phenomenon, which poses a unique set of challenges to media librarians and selectors. (Contains 11 online sources.)
format	Recurso educativo Open Access
id	eric_EJ873102
institution	ERIC Institute of Education Sciences
language	en
publishDate	2004
record_format	eric
spellingShingle	Stop the Technology, I Want to Get off: Tips and Tricks for Media Selection and Acquisition Laskowski, Mary S. Media Selection Information Technology Technological Literacy Selection Tools Library Development Library Materials Barriers Performance Factors Information Sources Video Technology Stop the Technology, I Want to Get off: Tips and Tricks for Media Selection and Acquisition Laskowski, Mary S. Media Selection Information Technology Technological Literacy Selection Tools Library Development Library Materials Barriers Performance Factors Information Sources Video Technology Media selection and acquisition is highly dependent on a number of variables, perhaps the most important of which is changing technologies. New technology is a wonderful and frightening thing, with a high level of impact on media collection development. New technologies can improve sound and visual quality, but can also play havoc with established collections and budgets. Availability of various media formats and titles is a very fluid phenomenon, which poses a unique set of challenges to media librarians and selectors. (Contains 11 online sources.)
title	Stop the Technology, I Want to Get off: Tips and Tricks for Media Selection and Acquisition
topic	Media Selection Information Technology Technological Literacy Selection Tools Library Development Library Materials Barriers Performance Factors Information Sources Video Technology
url	https://eric.ed.gov/?id=EJ873102

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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