Offline Prints via DIALMAIL: They Ain't Necessarily Cheap.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Durfee, Linda J.
Format:	Recurso educativo Open Access
Language:	en
Published:	1987
Subjects:	Bibliographic Databases Comparative Analysis Computer Software Reviews Cost Effectiveness Electronic Mail Information Technology Library Automation Online Searching Online Systems Search Strategies
Online Access:	Acceder al recurso
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author	Durfee, Linda J.
author_facet	Durfee, Linda J. Durfee, Linda J.
collection	Education Resources Information Center
contents	Offline Prints via DIALMAIL: They Ain't Necessarily Cheap. Durfee, Linda J. Bibliographic Databases Comparative Analysis Computer Software Reviews Cost Effectiveness Electronic Mail Information Technology Library Automation Online Searching Online Systems Search Strategies When DIALOG introduced DIALMAIL, its electronic mail service, online searchers were encouraged to use it as an alternative delivery method for offline prints. The new method of retrieval was considered to be fast and described in documentation and reviews as being much less expensive than online types. Performed in June 1987, this study compares the cost of retrieving online types in three DIALOG files to the cost of retrieving the same records offline using DIALMAIL. Using an IBM-PC with random access memory and an on-board Hayes Smartmodem 1200B, Smartcom II, and a Legend 1380 dot matrix printer, sample searches were conducted on ONTAP ERIC, ONTAP PsycINFO, and ONTAP MEDLINE, which are commonly searched online and which represent a range of price schedules. The PsycINFO retrieval via DIALMAIL indicated a 52% savings over DIALOG; however, retrieving ERIC and MEDLINE data via DIALMAIL costs slightly more than the online source. Overall, it is concluded that prints are not consistently less expensive than online types, and searchers are cautioned to do similar cost comparisons for the databases they use most often. (SD)
format	Recurso educativo Open Access
id	eric_ED317215
institution	ERIC Institute of Education Sciences
language	en
publishDate	1987
record_format	eric
spellingShingle	Offline Prints via DIALMAIL: They Ain't Necessarily Cheap. Durfee, Linda J. Bibliographic Databases Comparative Analysis Computer Software Reviews Cost Effectiveness Electronic Mail Information Technology Library Automation Online Searching Online Systems Search Strategies Offline Prints via DIALMAIL: They Ain't Necessarily Cheap. Durfee, Linda J. Bibliographic Databases Comparative Analysis Computer Software Reviews Cost Effectiveness Electronic Mail Information Technology Library Automation Online Searching Online Systems Search Strategies When DIALOG introduced DIALMAIL, its electronic mail service, online searchers were encouraged to use it as an alternative delivery method for offline prints. The new method of retrieval was considered to be fast and described in documentation and reviews as being much less expensive than online types. Performed in June 1987, this study compares the cost of retrieving online types in three DIALOG files to the cost of retrieving the same records offline using DIALMAIL. Using an IBM-PC with random access memory and an on-board Hayes Smartmodem 1200B, Smartcom II, and a Legend 1380 dot matrix printer, sample searches were conducted on ONTAP ERIC, ONTAP PsycINFO, and ONTAP MEDLINE, which are commonly searched online and which represent a range of price schedules. The PsycINFO retrieval via DIALMAIL indicated a 52% savings over DIALOG; however, retrieving ERIC and MEDLINE data via DIALMAIL costs slightly more than the online source. Overall, it is concluded that prints are not consistently less expensive than online types, and searchers are cautioned to do similar cost comparisons for the databases they use most often. (SD)
title	Offline Prints via DIALMAIL: They Ain't Necessarily Cheap.
topic	Bibliographic Databases Comparative Analysis Computer Software Reviews Cost Effectiveness Electronic Mail Information Technology Library Automation Online Searching Online Systems Search Strategies
url	https://eric.ed.gov/?id=ED317215

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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