Evaluation of Advanced Retrieval Techniques in an Experimental Online Catalog.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Larson, Ray R.
Format:	Recurso educativo Open Access
Language:	en
Published:	1992
Subjects:	Classification College Libraries Databases Evaluation Methods Higher Education Library Catalogs Mathematical Formulas Online Catalogs Online Searching Problems Relevance (Information Retrieval) Search Strategies Subject Index Terms Tables (Data)
Online Access:	Acceder al recurso
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author	Larson, Ray R.
author_facet	Larson, Ray R. Larson, Ray R.
collection	Education Resources Information Center
contents	Evaluation of Advanced Retrieval Techniques in an Experimental Online Catalog. Larson, Ray R. Classification College Libraries Databases Evaluation Methods Higher Education Library Catalogs Mathematical Formulas Online Catalogs Online Searching Problems Relevance (Information Retrieval) Search Strategies Subject Index Terms Tables (Data) Discusses subject searching problems in online library catalogs; explains advanced information retrieval (IR) techniques; and describes experiments conducted on a test collection database, CHESHIRE (California Hybrid Extended SMART for Hypertext and Information Retrieval Experimentation), which was created to evaluate IR techniques in online catalog systems. (80 references) (LRW)
format	Recurso educativo Open Access
id	eric_EJ441718
institution	ERIC Institute of Education Sciences
language	en
publishDate	1992
record_format	eric
spellingShingle	Evaluation of Advanced Retrieval Techniques in an Experimental Online Catalog. Larson, Ray R. Classification College Libraries Databases Evaluation Methods Higher Education Library Catalogs Mathematical Formulas Online Catalogs Online Searching Problems Relevance (Information Retrieval) Search Strategies Subject Index Terms Tables (Data) Evaluation of Advanced Retrieval Techniques in an Experimental Online Catalog. Larson, Ray R. Classification College Libraries Databases Evaluation Methods Higher Education Library Catalogs Mathematical Formulas Online Catalogs Online Searching Problems Relevance (Information Retrieval) Search Strategies Subject Index Terms Tables (Data) Discusses subject searching problems in online library catalogs; explains advanced information retrieval (IR) techniques; and describes experiments conducted on a test collection database, CHESHIRE (California Hybrid Extended SMART for Hypertext and Information Retrieval Experimentation), which was created to evaluate IR techniques in online catalog systems. (80 references) (LRW)
title	Evaluation of Advanced Retrieval Techniques in an Experimental Online Catalog.
topic	Classification College Libraries Databases Evaluation Methods Higher Education Library Catalogs Mathematical Formulas Online Catalogs Online Searching Problems Relevance (Information Retrieval) Search Strategies Subject Index Terms Tables (Data)
url	https://eric.ed.gov/?id=EJ441718

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// 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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