Introduction and Overview.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Fox, Edward A, Lunin, Lois F.
Format:	Recurso educativo Open Access
Language:	en
Published:	1993
Subjects:	Authors Change Strategies Electronic Libraries Federal Legislation Information Networks Information Technology Library Automation Planning Problems Technological Advancement
Online Access:	Acceder al recurso
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Library Services and Construction Act Amendments of 1989.
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Technology Options for Libraries. ERIC Digest.
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Telecommunications: Making Sense of New Technology and New Legislation. Papers Presented at the 1984 Clinic on Library Applications of Data Processing (April 14-16, 1984).
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Libraries and the End of the New Feudalism.
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High Performance Computing and Network Program. Hearing before the Subcommittee on Science of the Committee on Science, Space, and Technology, House of Representatives, One Hundred Third Congress, First Session.
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Library Automation: The Next Wave.
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Interfaced vs. Integrated Systems.
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The Cross Currents of Technology Transfer: The Czech and Slovak Library Information Network.
by: Lass, Andrew
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The Library Community and the National Research and Education Network.
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Technological Implementations and Ethical Failures.
by: Hauptman, Robert
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Implementing Technological Change.
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Title 44 and Federal Information Dissemination--A Technology and Policy Challenge for Congress: A Viewpoint.
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Strategies for Change: Part I.
by: Atkinson, Hugh C.
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The Impact of Technology on Legislation Affecting Libraries.
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H.R. 1757--High Performance Computing and High Speed Networking Applications Act of 1993. Hearings before the Subcommittee on Science of the Committee on Science, Space, and Technology. House of Representatives, One Hundred Third Congress, First Session (April 27, May 6, May 11, 1993).
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Sources of Library Funding. Final Report.
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College Library Technology and Cooperation Grants Program: An Overview.
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The Evolution of Academic Libraries: The Networked Environment
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FY2000 LSTA Guide.
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Library Services and Technology Act: FY1999 LSTA Guide.
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Tomorrow's Library Today.
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Technological Innovation and Organizational Change.
by: Drake, Miriam A.
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Establishing Information Service Strategies in a Technological Environment.
by: Penniman, W. David
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The Federal Depository Library Program in Transition: A Perspective at the Turn of a Century.
by: O'Mahony, Daniel P.
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Local Places, Global Connections: Libraries in the Digital Age. What's Going On Series.
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The Electronic Library and the Online Classroom: A Technical, Legal, Ethical, and Moral Perspective.
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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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