The Selective Disseminator of Information (SDI): A New Role for the Librarian?

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Strehlow, T. H.
Format:	Recurso educativo Open Access
Language:	en
Published:	1978
Subjects:	Bibliographies Information Dissemination Information Needs Information Sources Institutional Administration Librarians Library Role Online Systems Program Descriptions Selective Dissemination of Information
Online Access:	Acceder al recurso
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Managing the Information Resource: The Changing Role of Librarians.
by: Diebold, John
Published: (1983)

Introduction: Mediation: The Librarian's Role in Information Dissemination.
by: Ewing, M. Keith, et al.
Published: (1992)

Current Awareness Services--Observations of the Past and Present, and Implications for the Future
by: Brandli, Michael J.
Published: (1976)

School and Public Library Programs and Information Dissemination
by: Baker, D. Philip
Published: (1977)

Computerized Information Service--SDI. Annual Report 1974-75.
by: Hjerppe, Roland
Published: (1976)

A MARC Based SDI Service
by: Bierman, Kenneth John, et al.
Published: (1970)

On-Line Reference Services and Teacher/Librarians.
by: Curley, Elizabeth McDonald
Published: (1979)

The Public Library in a Communications Setting.
by: Stevenson, Gordon
Published: (1978)

"SDI--Where are We? The Challenge of the Future." The Information Dissemination Center View.
by: Carmon, James L.
Published: (1974)

SDI Systems. A United Kingdom Approach
by: Goom, H. H.
Published: (1971)

Selective Dissemination of Microfiche Documents in a University Setting: Phase 1. Final Report. Project CLR-561.
by: Meredith, Joseph C.
Published: (1975)

Are Libraries Causing or Utilizing the Information Explosion?
by: Gaffner, Haines B.
Published: (1973)

Intramural Alerting Services. The Distribution List Technique
by: Windsor, Diane M., et al.
Published: (1970)

College Guide Surveys and the Information Revolution: Issues and Consequences. AIR 1994 Annual Forum Paper.
by: Machung, Anne
Published: (1994)

Unesco's General Information Programme and the Application of Information Management Software for Microcomputers.
by: Tocatlian, Jacques, et al.
Published: (1984)

The Librarian and the Scholar: Eternal Enemies
by: Logsdon, Richard H.
Published: (1970)

The Internet Express: Meta Sites for Efficient Internet Exploration.
by: Raeder, Aggi
Published: (1996)

Scholars' Access to Information: Public Responsibility/Private Initiative. Minutes of the Ninety-Ninth Meeting, October 29-30, 1981, Washington, D.C.
Published: (1982)

Reinventing the Library--How Repositories Are Causing Librarians to Rethink Their Professional Roles
by: Walters, Tyler O.
Published: (2007)

Current Awareness Bulletin, Its Preparation and Use in a Non-Automated Library
by: Kalvinskas, Louanne A.
Published: (1971)

Marine Information Centre Development: An Introductory Manual. Manuals and Guides 23.
by: Varley, Allan
Published: (1991)

Charging Users for Library Service.
by: Cooper, Michael D.
Published: (1978)

Project SEEK, 1979-1982. Final Report.
Published: (1982)

The Drug Dilemma
by: Hering, Millicent B.
Published: (1971)

Librarianship: The Challenge of the Information and Electronic Revolution.
by: Dunstan, Peter
Published: (1986)

A Bird's-Eye View of the Present Role of Libraries and University Presses in the Dissemination of Modern Language Studies.
by: Mihram, Danielle
Published: (1983)

Academic Librarians and Their Role in Disseminating Accurate Knowledge and Information about the Gray Zone in Predatory Publishing
by: Teixeira da Silva, Jaime A.
Published: (2022)

SELECTIVE DISSEMINATION OF INFORMATION (SDI). VOLUME I, PILOT TEST AT U.S. ARMY NATICK LABORATORIES. FINAL REPORT. ARMY TECHNICAL LIBRARY IMPROVEMENT STUDIES (ATLIS), REPORT NO. 15.
by: BIVONA, WILLIAM A.
Published: (1967)

Your Right to Know: Librarians Make It Happen.
by: Schuman, Patricia
Published: (1991)

Governments and Information. IST 607; A Graduate Course.
by: Dosa, Marta L.
Published: (1983)

Developing Collections to Empower Learners
by: Kimmel, Sue C.
Published: (2014)

Issues in Clinical Information Delivery.
by: Marshall, Joanne G.
Published: (1993)

Information Gathering And Disseminating Activities of the National Library of Medicine.
Published: (1970)

The Effectiveness and Feasibility of a TRISNET Regional Center in Information Transfer. Final Report.
by: Rath, Gustave J., et al.
Published: (1975)

SDI Citation Checking as a Measure of the Performance of Library Document Delivery Systems.
by: Bourne, Charles P., et al.
Published: (1973)

Inmate Informational Needs Survey. Final Report.
by: Vogel, Brenda
Published: (1976)

Creating User-Friendly Electronic Information Systems.
by: Morgan, Eric Lease
Published: (1997)

Patent and Trademark Depository Libraries and the United States Patent and Trademark Office: A Model for Information Dissemination
by: Jenda, Claudine Arnold
Published: (2005)

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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