The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles.

Fuente: ERIC Institute of Education Sciences

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Jarvelin, Kalervo, Vakkari, Pertti
Format:	Recurso educativo Open Access
Sprache:	en
Veröffentlicht:	1993
Schlagworte:	Content Analysis Information Retrieval Information Science Information Storage Research Methodology Scholarly Journals Tables (Data)
Online-Zugang:	Acceder al recurso
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author	Jarvelin, Kalervo Vakkari, Pertti
author_facet	Jarvelin, Kalervo Vakkari, Pertti Jarvelin, Kalervo Vakkari, Pertti
collection	Education Resources Information Center
contents	The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles. Jarvelin, Kalervo Vakkari, Pertti Content Analysis Information Retrieval Information Science Information Storage Research Methodology Scholarly Journals Tables (Data) This content analysis of library and information science (LIS) research from 1965 to 1985 was conducted to determine the distribution of topics in research articles and the research methodologies that have been used. Results indicated that information storage and retrieval was the most popular topic and that empirical strategies predominated. (20 references) (LRW)
format	Recurso educativo Open Access
id	eric_EJ459920
institution	ERIC Institute of Education Sciences
language	en
publishDate	1993
record_format	eric
spellingShingle	The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles. Jarvelin, Kalervo Vakkari, Pertti Content Analysis Information Retrieval Information Science Information Storage Research Methodology Scholarly Journals Tables (Data) The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles. Jarvelin, Kalervo Vakkari, Pertti Content Analysis Information Retrieval Information Science Information Storage Research Methodology Scholarly Journals Tables (Data) This content analysis of library and information science (LIS) research from 1965 to 1985 was conducted to determine the distribution of topics in research articles and the research methodologies that have been used. Results indicated that information storage and retrieval was the most popular topic and that empirical strategies predominated. (20 references) (LRW)
title	The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles.
topic	Content Analysis Information Retrieval Information Science Information Storage Research Methodology Scholarly Journals Tables (Data)
url	https://eric.ed.gov/?id=EJ459920

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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