The Challenge to Library and Information Professionals in the Visual Information Age.

Fuente: ERIC Institute of Education Sciences

Saved in:

Bibliographic Details
Main Author:	Chen, Ching-chih
Format:	Recurso educativo Open Access
Language:	en
Published:	1990
Subjects:	Futures (of Society) Hypermedia Information Systems Library Services Microcomputers Multimedia Instruction Technological Advancement Users (Information) Visual Aids
Online Access:	Acceder al recurso
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_version_	1867180996104814592
author	Chen, Ching-chih
author_facet	Chen, Ching-chih Chen, Ching-chih
collection	Education Resources Information Center
contents	The Challenge to Library and Information Professionals in the Visual Information Age. Chen, Ching-chih Futures (of Society) Hypermedia Information Systems Library Services Microcomputers Multimedia Instruction Technological Advancement Users (Information) Visual Aids Discusses multimedia/hypermedia information delivery and the effects of new technological developments; describes hypermedia applications, including PROJECT EMPEROR-I; considers the use of multimedia technology for end-user information delivery and its influence on library and information systems and services; and suggests possible future trends. (11 references) (LRW)
format	Recurso educativo Open Access
id	eric_EJ433196
institution	ERIC Institute of Education Sciences
language	en
publishDate	1990
record_format	eric
spellingShingle	The Challenge to Library and Information Professionals in the Visual Information Age. Chen, Ching-chih Futures (of Society) Hypermedia Information Systems Library Services Microcomputers Multimedia Instruction Technological Advancement Users (Information) Visual Aids The Challenge to Library and Information Professionals in the Visual Information Age. Chen, Ching-chih Futures (of Society) Hypermedia Information Systems Library Services Microcomputers Multimedia Instruction Technological Advancement Users (Information) Visual Aids Discusses multimedia/hypermedia information delivery and the effects of new technological developments; describes hypermedia applications, including PROJECT EMPEROR-I; considers the use of multimedia technology for end-user information delivery and its influence on library and information systems and services; and suggests possible future trends. (11 references) (LRW)
title	The Challenge to Library and Information Professionals in the Visual Information Age.
topic	Futures (of Society) Hypermedia Information Systems Library Services Microcomputers Multimedia Instruction Technological Advancement Users (Information) Visual Aids
url	https://eric.ed.gov/?id=EJ433196

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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VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
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HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
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HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
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REMOTE_PORT	"21264"
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SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
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REQUEST_URI	"/Record/eric_EJ433196/Details"
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PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1789390076.306
REQUEST_TIME	1789390076

Environment Variables empty

Registered Handlers

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