Scientific Research in Online Retrieval: A Critical Review.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Bellardo, Trudi
Format:	Recurso educativo Open Access
Language:	en
Published:	1981
Subjects:	Comparative Analysis Computers Cost Effectiveness Costs Databases Information Retrieval Literature Reviews Man Machine Systems Online Systems Use Studies User Satisfaction (Information)
Online Access:	Acceder al recurso
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Economies of Online Retrieval.
by: Markee, Katherine M.
Published: (1981)

Implementation of an Online Bibliographic Database into a Community College Library: An Evaluation.
by: Fink, Teri A.
Published: (1985)

The Process of Searching Online Bibliographic Databases: A Review of Research.
by: Fenichel, Carol Hansen
Published: (1980)

Evaluation of CD-ROM Use in a Government Research Library.
by: Welsh, John J.
Published: (1989)

Some Benefits of the Online Catalog.
by: Getz, Malcolm
Published: (1987)

A Study of GRATEFUL MED Use in a Graduate Health Program.
by: Henry, Marcia Klinger
Published: (1989)

A Comparison of Three Online Information Retrieval Services.
by: Zais, Harriet W.
Published: (1974)

A Comparison of Costs of Searching the Machine-Readable Data Bases ERIC and "Psychological Abstracts" in an Annual Subscription Rate System Against Costs Estimated for the Same Searches Done in the Lockheed DIALOG System and the System Development Corporation for ERIC, and the Lockheed DIALOG System and PASAT for "Psychological Abstracts."
by: Palmer, Crescentia
Published: (1976)

Management, Cost, and Behavioral Issues with Locally Mounted Databases.
by: Meyer, Richard W.
Published: (1990)

Valuing a Document Delivery System.
by: Estabrook, Leigh Stewart
Published: (1986)

Library Materials: Paper, Microform, Database.
by: Buckland, Michael K.
Published: (1988)

Closing the Gap: The Role of the Librarian in Online Searching.
by: Dalrymple, Prudence W.
Published: (1984)

Evaluation of Costs and Benefits of Libraries.
by: Leimkuhler, Ferdinand F.
Published: (1978)

Searching the Intelligent Gateway EasyNet--The End-User's Point of View.
by: Larsen, Gitte
Published: (1987)

Being an End-User Is Not for Everyone.
by: Cornick, Donna
Published: (1989)

Evaluating End-User Services: Success or Satisfaction?
by: Ankeny, Melvon L.
Published: (1991)

Online vs. CD-ROM vs. Onsite: High Volume Searching--Considering the Alternatives.
by: Halperin, Michael, et al.
Published: (1988)

Infopass: Some Organizational Concerns of a Local Cooperative Reference Program. Occasional Paper No. 2.
by: Galligan, Sara A.
Published: (1980)

Usage Rates among TWU-ERIC and Other ERIC Bibliographic Systems on the Texas Woman's University, Denton, Campus.
by: Galloway, James W.
Published: (1988)

Microcomputers and the Online Catalog: Changing How the Catalog Is Used.
by: Fayen, Emily Gallup
Published: (1986)

Impact of On-Line Retrieval Services: A Survey of Users, 1974-75.
by: Wanger, Judith, et al.
Published: (1976)

Etude Comparative des Systemes de Reperage de l'Information Bibliographique en Mode Dialogue. Rapports de Recherche, No. 13 (Comparative Study of Systems for the Online Retrieval of Bibliographic Information. Research Report No. 13).
by: Perusse, Lyse
Published: (1979)

Collection Building vs. Document Delivery: An Evaluation of Methods To Provide NTIS Documents in an Academic Engineering Library.
by: Butler, John
Published: (1987)

Subjective versus Objective Relevance in Bibliographic Retrieval Systems.
by: Swanson, Don R.
Published: (1986)

Research on the Use of Online Catalogs and Its Implications for Library Practice.
by: Lewis, David W.
Published: (1987)

The Online Journal of Current Clinical Trials: An Innovation in Electronic Journal Publishing.
by: Keyhani, Andrea
Published: (1993)

Hard Copy versus Online Services: Results of a Survey.
by: Wall, Celia, et al.
Published: (1990)

Searching CA Condensates, On-Line and Batch.
by: Kaminecki, Ronald M., et al.
Published: (1975)

Catalog Use at the University of Wisconsin-Stout: A Comparative Study.
by: Richards, Mary
Published: (1987)

Successes and Failures of Patrons Searching the Online Catalog at a Large Academic Library: A Transaction Log Analysis.
by: Hunter, Rhonda N.
Published: (1991)

Public Libraries Online.
by: Roose, Tina
Published: (1989)

Economics of Information Resource Utilization: Applied Research in the Academic Community.
by: Evans, John E.
Published: (1995)

Offline Prints via DIALMAIL: They Ain't Necessarily Cheap.
by: Durfee, Linda J.
Published: (1987)

Observations of End-User Online Searching Behavior over Eleven Years.
by: Sewell, Winifred, et al.
Published: (1986)

On-line Information Services in the University of Hong Kong Libraries: Three Years' Experience.
by: Tso, P. S.
Published: (1984)

A Comprehensive Study of Online Public Access Catalogs: An Overview and Application of Findings. Volume III of Three Volumes. Final Report.
by: Kaske, Neal K., et al.
Published: (1983)

Online Catalogs and Their Users.
by: Broadus, Robert N.
Published: (1983)

Online Bibliographic Searching in Cooperative Reference Networks.
by: Roose, Tina
Published: (1982)

MARC Format Simplification.
by: Gapen, D. Kaye
Published: (1981)

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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