The Effect of Indexing Exhaustivity on Retrieval Performance.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Burgin, Robert
Format:	Recurso educativo Open Access
Language:	en
Published:	1991
Subjects:	Cystic Fibrosis Indexing Information Retrieval Relevance (Information Retrieval)
Online Access:	Acceder al recurso
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Subject and Citation Indexing. Part I: The Clustering Structure of Composite Representations in the Cystic Fibrosis Document Collection. Part II: The Optimal, Cluster-Based Retrieval Performance of Composite Representations.
by: Shaw, W. M., Jr.
Published: (1991)

The Cystic Fibrosis Database: Content and Research Opportunities.
by: Shaw, William M., Jr., et al.
Published: (1991)

Indexing Depth and Retrieval Effectiveness
by: Seely, Barbara J.
Published: (1972)

A Retrieval Comparison of Six Published Indexes in the Field of Library and Information Science
by: Keen, E. Michael
Published: (1976)

Evaluation of Machine-Aided Indexing
by: Klingbiel, Paul H., et al.
Published: (1976)

Postcoordinate Retrieval: A Comparison of Two Indexing Languages.
by: Schabas, Ann H.
Published: (1982)

Computerized Information Storage and Retrieval Systems.
by: Azubuike, Abraham A., et al.
Published: (1988)

The Efficiency of MEDLARS Titles for Retrieval
by: Miller, William L.
Published: (1971)

The Cranfield II Relevance Assessments: A Critical Evaluation
by: Harter, Stephen P.
Published: (1971)

Automatic Indexing in the Science and Social Science Citation Index CD-ROM.
by: Cawkell, A. E.
Published: (1989)

Examination of the Validity of the Conclusions Arrived at in the Aslib Cranfield Research Project.
by: te Nuyl, Th. W.
Published: (1968)

Some Unexplained Aspects of the Cranfield Tests of Indexing Performance Factors
by: Swanson, Don R.
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Written Representation of Topics and the Production of Query Terms
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Indexers' Reactions to PRECIS.
by: Bakewell, K. G. B.
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Data Definition and the Decline of Cataloging Quality.
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To Index or Not To Index.
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Vocabulary Control for Information Retrieval.
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Use of Classification in Online Retrieval.
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Published: (1983)

Efficiency of PRECIS Role Operators.
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Some Fundamental Concepts of Information Retrieval.
by: Wilson, Patrick
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Augmenting Subject Descriptions for Books in Online Catalogs.
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File Construction Using FAMULUS.
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Subject Relationships between Cited and Citing Documents in Library and Information Science.
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Books Are for Use. Final Report of the Subject Access Project to the Council on Library Resources.
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Locating Sources in Humanities Scholarship: The Efficacy of Following Bibliographic References.
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Salt-secreting ionocytes in marine fishes: new dimensions and evolutionary implications of a fundamental model.
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Published: (2025)

The Case for Coexistence: Hardcopy and Online Searching.
by: Maciuszko, Kathleen L.
Published: (1989)

Automatic Classification in Information Retrieval.
by: van Rijsbergen, C. J.
Published: (1978)

Literature in MEDLINE. . . A Bibliographic Anomaly?
by: Robbins, Simone B.
Published: (1985)

Retrieval Effectiveness of Enhanced Bibliographic Records.
by: Dillon, Martin, et al.
Published: (1990)

Comparing Computerized and Paper Based Information Retrieval Systems in Library Public Services: A Meta-Analysis.
by: Trahan, Eric
Published: (1990)

System Features for Subject Access in the Online Catalog.
by: Lawrence, Gary S.
Published: (1985)

In Theory There Is No Solution: The Impediments to a Subject Cataloging Code.
by: Reynolds, Sally Jo
Published: (1989)

Research Toward Enhancing Retrieval Effectiveness.
by: Schipma, Peter B.
Published: (1976)

Fiction Retrieval: Experimental Design and Evaluation of a Search System Based on Users' Value Criteria (Part 1).
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Characteristics of a Literature as Predictors of Relatedness Between Cited and Citing Works.
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A Comparison between Free Language and Controlled Language Indexing and Searching.
by: Rowley, J. E.
Published: (1990)

Application of the Variety-Generator Approach to Searches of Personal Names in Bibliographic Data Bases - Part 2. Optimization of Key-Sets, and Evaluation of Their Retrieval Efficiency
by: Fokker, Dirk W., et al.
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Information Storage and Retrieval. Reports on Analysis, Search, and Iterative Retrieval.
by: Salton, Gerard
Published: (1968)

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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