Information Access in the Humanities: Perils and Pitfalls.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Walker, Geraldene, Atkinson, Steven D.
Format:	Recurso educativo Open Access
Language:	en
Published:	1991
Subjects:	Comparative Analysis Computer System Design Databases Graphs Humanities Information Retrieval Intellectual Disciplines Online Systems Search Strategies Subject Index Terms User Needs (Information) Vocabulary
Online Access:	Acceder al recurso
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author	Walker, Geraldene Atkinson, Steven D.
author_facet	Walker, Geraldene Atkinson, Steven D. Walker, Geraldene Atkinson, Steven D.
collection	Education Resources Information Center
contents	Information Access in the Humanities: Perils and Pitfalls. Walker, Geraldene Atkinson, Steven D. Comparative Analysis Computer System Design Databases Graphs Humanities Information Retrieval Intellectual Disciplines Online Systems Search Strategies Subject Index Terms User Needs (Information) Vocabulary Describes a study that investigated subject retrieval in a group of humanities databases. Scatter by subject field and type of search term is discussed, the effectiveness of natural language and of controlled vocabulary are compared, and implications for system designers concerned with end-user searches in the humanities are suggested. (37 references) (LRW)
format	Recurso educativo Open Access
id	eric_EJ428917
institution	ERIC Institute of Education Sciences
language	en
publishDate	1991
record_format	eric
spellingShingle	Information Access in the Humanities: Perils and Pitfalls. Walker, Geraldene Atkinson, Steven D. Comparative Analysis Computer System Design Databases Graphs Humanities Information Retrieval Intellectual Disciplines Online Systems Search Strategies Subject Index Terms User Needs (Information) Vocabulary Information Access in the Humanities: Perils and Pitfalls. Walker, Geraldene Atkinson, Steven D. Comparative Analysis Computer System Design Databases Graphs Humanities Information Retrieval Intellectual Disciplines Online Systems Search Strategies Subject Index Terms User Needs (Information) Vocabulary Describes a study that investigated subject retrieval in a group of humanities databases. Scatter by subject field and type of search term is discussed, the effectiveness of natural language and of controlled vocabulary are compared, and implications for system designers concerned with end-user searches in the humanities are suggested. (37 references) (LRW)
title	Information Access in the Humanities: Perils and Pitfalls.
topic	Comparative Analysis Computer System Design Databases Graphs Humanities Information Retrieval Intellectual Disciplines Online Systems Search Strategies Subject Index Terms User Needs (Information) Vocabulary
url	https://eric.ed.gov/?id=EJ428917

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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