Videodisc and Optical Digital Disk Technologies and Their Applications in Libraries. A Report to the Council on Library Resources.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Format:	Recurso educativo Open Access
Language:	en
Published:	1985
Subjects:	Audiodisc Recordings Computer Storage Devices Information Processing Information Retrieval Information Science Information Storage Libraries Library Materials Library Research Library Services Library Technical Processes Preservation Videodisc Recordings
Online Access:	Acceder al recurso
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Optical Disks and Demand Printing Research at the Library of Congress.
by: Price, Joseph W.
Published: (1985)

The Utilization of Microforms in Technical Services.
by: Schleifer, Harold B.
Published: (1982)

The Videodisc as a Library Tool.
by: Sonnemann, Sabine S.
Published: (1983)

The Library of Congress Use of Microcomputers in the Optical Disk Pilot Program.
by: Price, Joseph W.
Published: (1985)

The Library of Congress: A More-Than-Equal Partner.
by: Welsh, William J.
Published: (1985)

The Care and Maintenance of Videodiscs and Players.
by: Paris, Judith, et al.
Published: (1982)

Videodisc Technology: Developments 1980-1982.
by: Riddick, John
Published: (1983)

Information Technology.
by: Marcum, Deanna, et al.
Published: (1981)

Multiple Versions Forum Report. Report from a Meeting (Airlie House, Warrenton, Virginia, December 6-8, 1989).
Published: (1990)

Collections Security: The Preservation Perspective.
by: Patkus, Beth L.
Published: (1998)

Archives in the Church or Synagogue Library. CSLA Guide No. 10. Second Revised Edition.
by: Ling, Evelyn R.
Published: (1996)

The Library of Congress Non-Print Optical Disk Pilot Program.
by: Parker, Elisabeth Betz
Published: (1985)

Digitizing Technologies for Preservation. SPEC Kit 214.
by: Kellerman, L. Suzanne, Comp., et al.
Published: (1996)

Electronic Publishing--A View From the Library.
by: Raitt, D. I.
Published: (1985)

Videodiscs: A Revolution That Isn't.
Published: (1982)

The Author and Title Catalog in the Library; Its Role, Function, and Objectives; Report 2 of a Series on the Principles of Cataloging.
by: Lubetzky, Seymour
Published: (1969)

Preservation--Everybody's Job.
by: Schobernd, Elizabeth M.
Published: (1999)

Trade Literature as a Library Material
by: Kelbrick, N.
Published: (1971)

Descriptive Cataloging: Problems and Principles; Report 3 of a Series on the Principles of Cataloging.
by: Lubetzky, Seymour
Published: (1969)

Bibliographic Dimensions in Information Control; Report 1 of a Series on the Principles of Cataloging.
by: Lubetzky, Seymour, et al.
Published: (1968)

New Tools for Preservation: Assessing Long-Term Environmental Effects on Library and Archives Collections.
by: Reilly, James M., et al.
Published: (1995)

Library Operations Research: A Process of Discovery and Justification
by: Leimkuhler, Ferdinand F.
Published: (1972)

Storage Technology: Present and Future.
by: Goldstein, Charles M.
Published: (1984)

An Index to Commercial Spoken Word Recordings in the Library of Congress
by: Greyer, Read
Published: (1973)

A Moral and Legal Obligation: Preservation in the Digital Age.
by: Marcum, Deanna
Published: (1997)

Why Digitize?
by: Smith, Abby
Published: (1999)

Preservation of Digital Information. Proceedings of the Membership Meeting of the Association of Research Libraries (131st, Washington, DC, October 15-17, 1997).
by: Barrett, Jaia, Ed., et al.
Published: (2001)

Libraries of the Future.
by: Licklider, J. C. R.
Published: (1965)

The United Nations Sound Recording Collection
by: Furst, Pierre G.
Published: (1973)

CD-ROM and Libraries.
by: Murphy, Brower
Published: (1985)

The NCPL [Natrona County, Wyoming Public Library] Scene 1980; Script for Video Tape.
Published: (1974)

On the Use of Form Headings in an Alphabetical Catalog.
by: Lubetzky, Seymour
Published: (1999)

OCLC-MARC Tape Processing: A Functional Analysis.
by: Miller, Bruce Cummings
Published: (1984)

Sixth IASLIC Seminar Papers. Part I: Reference Service-in-Action. Part II: Processing & Servicing of Special Materials in Libraries.
Published: (1970)

InfoTrac: An Inhouse Computer-Access System.
by: Carney, Richard
Published: (1985)

Notes for Serials Cataloging. Second Edition.
by: Geer, Beverley, Ed., et al.
Published: (1998)

A State-Wide Union Catalog Feasibility Study. Final Report on Project III--FY 1976.
by: Williams, Martha E., et al.
Published: (1977)

The Archival View of Technology: Resources for the Scholar of the Future.
by: Zeidberg, David S.
Published: (1999)

A Study of the Organization and Search of Bibliographic Holdings Records in On-Line Computer Systems: Phase I. Final Report.
by: Cunningham, Jay L., et al.
Published: (1969)

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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