LIBRARY FICHE--AN INTRODUCTION AND EXPLANATION.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	TEPLITZ, ARTHUR
Format:	Recurso educativo Open Access
Language:	en
Published:	1967
Subjects:	Automation Books Cost Effectiveness Improvement Libraries Microfiche Microfilm Periodicals Standards Systems Approach Time Sharing
Online Access:	Acceder al recurso
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author	TEPLITZ, ARTHUR
author_facet	TEPLITZ, ARTHUR TEPLITZ, ARTHUR
collection	Education Resources Information Center
contents	LIBRARY FICHE--AN INTRODUCTION AND EXPLANATION. TEPLITZ, ARTHUR Automation Books Cost Effectiveness Improvement Libraries Microfiche Microfilm Periodicals Standards Systems Approach Time Sharing THE PAPER DESCRIBES THE NEED FOR A NEW MICROFICHE REDUCTION RATIO TO PROVIDE MORE SATISFACTORY MICROFORMS OF BOOKS AND PERIODICALS FOR LIBRARIES OF THE FUTURE AND URGES ITS CONSIDERATION AND ADOPTION BY THE MICROFILM INDUSTRY. IT DISCUSSES THE CONCEPT OF HAVING ONE MICROFICHE FOR EACH BOOK, AND ITS ADVANTAGES IN USE IN A DISTRIBUTION LIBRARY, OR IN AN AUTOMATED LIBRARY, USING TIME-SHARING TECHNIQUES. THE GENERAL CHARACTERISTICS OF LIBRARY FICHE, THE REDUCTION RATIOS, THE NUMBER OF PAGES, AND PREPARATION REQUIREMENTS ARE GIVEN. THE ECONOMIC COSTS OF ORIGINAL AND DUPLICATE LIBRARY FICHE ARE SPECIFIED. THE SIZE AND SHAPE OF THE POTENTIAL MARKET IS SPECIFIED, AND FUTURE GROWTH OF THE MARKET DELINEATED. THIS DOCUMENT IS AVAILABLE AS AD-661-660 FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VIRGINIA 22151, $3.00 FOR HARD COPY, $0.65 FOR MICROFICHE, 14 PAGES. (AUTHOR)
format	Recurso educativo Open Access
id	eric_ED016501
institution	ERIC Institute of Education Sciences
language	en
publishDate	1967
record_format	eric
spellingShingle	LIBRARY FICHE--AN INTRODUCTION AND EXPLANATION. TEPLITZ, ARTHUR Automation Books Cost Effectiveness Improvement Libraries Microfiche Microfilm Periodicals Standards Systems Approach Time Sharing LIBRARY FICHE--AN INTRODUCTION AND EXPLANATION. TEPLITZ, ARTHUR Automation Books Cost Effectiveness Improvement Libraries Microfiche Microfilm Periodicals Standards Systems Approach Time Sharing THE PAPER DESCRIBES THE NEED FOR A NEW MICROFICHE REDUCTION RATIO TO PROVIDE MORE SATISFACTORY MICROFORMS OF BOOKS AND PERIODICALS FOR LIBRARIES OF THE FUTURE AND URGES ITS CONSIDERATION AND ADOPTION BY THE MICROFILM INDUSTRY. IT DISCUSSES THE CONCEPT OF HAVING ONE MICROFICHE FOR EACH BOOK, AND ITS ADVANTAGES IN USE IN A DISTRIBUTION LIBRARY, OR IN AN AUTOMATED LIBRARY, USING TIME-SHARING TECHNIQUES. THE GENERAL CHARACTERISTICS OF LIBRARY FICHE, THE REDUCTION RATIOS, THE NUMBER OF PAGES, AND PREPARATION REQUIREMENTS ARE GIVEN. THE ECONOMIC COSTS OF ORIGINAL AND DUPLICATE LIBRARY FICHE ARE SPECIFIED. THE SIZE AND SHAPE OF THE POTENTIAL MARKET IS SPECIFIED, AND FUTURE GROWTH OF THE MARKET DELINEATED. THIS DOCUMENT IS AVAILABLE AS AD-661-660 FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VIRGINIA 22151, $3.00 FOR HARD COPY, $0.65 FOR MICROFICHE, 14 PAGES. (AUTHOR)
title	LIBRARY FICHE--AN INTRODUCTION AND EXPLANATION.
topic	Automation Books Cost Effectiveness Improvement Libraries Microfiche Microfilm Periodicals Standards Systems Approach Time Sharing
url	https://eric.ed.gov/?id=ED016501

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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