Primary Multimedia Objects and 'Educational Metadata' A Fundamental Dilemma for Developers of Multimedia Archives; Evaluation of Digital Library Impact and User Communities by Analysis of Usage Patterns; The KYVL Kentuckiana Digital Library Project: Background and Current Status; DPDx Collection.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Shabajee, Paul, Bollen, Johan, Luce, Rick, Weig, Eric
Format:	Recurso educativo Open Access
Language:	en
Published:	2002
Subjects:	Databases Electronic Libraries Evaluation Methods Information Retrieval Library Collections Metadata Multimedia Instruction Multimedia Materials Use Studies Users (Information)
Online Access:	Acceder al recurso
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author	Shabajee, Paul Bollen, Johan Luce, Rick Weig, Eric
author_facet	Shabajee, Paul Bollen, Johan Luce, Rick Weig, Eric Shabajee, Paul Bollen, Johan Luce, Rick Weig, Eric
collection	Education Resources Information Center
contents	Primary Multimedia Objects and 'Educational Metadata' A Fundamental Dilemma for Developers of Multimedia Archives; Evaluation of Digital Library Impact and User Communities by Analysis of Usage Patterns; The KYVL Kentuckiana Digital Library Project: Background and Current Status; DPDx Collection. Shabajee, Paul Bollen, Johan Luce, Rick Weig, Eric Databases Electronic Libraries Evaluation Methods Information Retrieval Library Collections Metadata Multimedia Instruction Multimedia Materials Use Studies Users (Information) Includes four articles that discuss multimedia educational database systems and the use of metadata, including repurposing; the evaluation of digital library use that analyzes the retrieval habits of users; the Kentucky Virtual Library (KYVL) and digital collection project; and the collection of the Division of Parasitic Diseases, Centers for Disease Control and Prevention. (LRW)
format	Recurso educativo Open Access
id	eric_EJ654077
institution	ERIC Institute of Education Sciences
language	en
publishDate	2002
record_format	eric
spellingShingle	Primary Multimedia Objects and 'Educational Metadata' A Fundamental Dilemma for Developers of Multimedia Archives; Evaluation of Digital Library Impact and User Communities by Analysis of Usage Patterns; The KYVL Kentuckiana Digital Library Project: Background and Current Status; DPDx Collection. Shabajee, Paul Bollen, Johan Luce, Rick Weig, Eric Databases Electronic Libraries Evaluation Methods Information Retrieval Library Collections Metadata Multimedia Instruction Multimedia Materials Use Studies Users (Information) Primary Multimedia Objects and 'Educational Metadata' A Fundamental Dilemma for Developers of Multimedia Archives; Evaluation of Digital Library Impact and User Communities by Analysis of Usage Patterns; The KYVL Kentuckiana Digital Library Project: Background and Current Status; DPDx Collection. Shabajee, Paul Bollen, Johan Luce, Rick Weig, Eric Databases Electronic Libraries Evaluation Methods Information Retrieval Library Collections Metadata Multimedia Instruction Multimedia Materials Use Studies Users (Information) Includes four articles that discuss multimedia educational database systems and the use of metadata, including repurposing; the evaluation of digital library use that analyzes the retrieval habits of users; the Kentucky Virtual Library (KYVL) and digital collection project; and the collection of the Division of Parasitic Diseases, Centers for Disease Control and Prevention. (LRW)
title	Primary Multimedia Objects and 'Educational Metadata' A Fundamental Dilemma for Developers of Multimedia Archives; Evaluation of Digital Library Impact and User Communities by Analysis of Usage Patterns; The KYVL Kentuckiana Digital Library Project: Background and Current Status; DPDx Collection.
topic	Databases Electronic Libraries Evaluation Methods Information Retrieval Library Collections Metadata Multimedia Instruction Multimedia Materials Use Studies Users (Information)
url	https://eric.ed.gov/?id=EJ654077

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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