Some Ideas on the Microcomputer and the Information/Knowledge Workstation.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Boon, J. A., Pienaar, H.
Format:	Recurso educativo Open Access
Language:	en
Published:	1989
Subjects:	Cognitive Processes Decision Making Information Scientists Information Technology Library Role Man Machine Systems Microcomputers Systems Development Technological Advancement
Online Access:	Acceder al recurso
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_version_	1867181582449639424
author	Boon, J. A. Pienaar, H.
author_facet	Boon, J. A. Pienaar, H. Boon, J. A. Pienaar, H.
collection	Education Resources Information Center
contents	Some Ideas on the Microcomputer and the Information/Knowledge Workstation. Boon, J. A. Pienaar, H. Cognitive Processes Decision Making Information Scientists Information Technology Library Role Man Machine Systems Microcomputers Systems Development Technological Advancement Identifies the optimal goal of knowledge workstations as the harmony of technology and human decision-making behaviors. Two types of decision-making processes are described and the application of each type to experimental and/or operational situations is discussed. Suggestions for technical solutions to machine-user interfaces are then offered. (10 references) (CLB)
format	Recurso educativo Open Access
id	eric_EJ405791
institution	ERIC Institute of Education Sciences
language	en
publishDate	1989
record_format	eric
spellingShingle	Some Ideas on the Microcomputer and the Information/Knowledge Workstation. Boon, J. A. Pienaar, H. Cognitive Processes Decision Making Information Scientists Information Technology Library Role Man Machine Systems Microcomputers Systems Development Technological Advancement Some Ideas on the Microcomputer and the Information/Knowledge Workstation. Boon, J. A. Pienaar, H. Cognitive Processes Decision Making Information Scientists Information Technology Library Role Man Machine Systems Microcomputers Systems Development Technological Advancement Identifies the optimal goal of knowledge workstations as the harmony of technology and human decision-making behaviors. Two types of decision-making processes are described and the application of each type to experimental and/or operational situations is discussed. Suggestions for technical solutions to machine-user interfaces are then offered. (10 references) (CLB)
title	Some Ideas on the Microcomputer and the Information/Knowledge Workstation.
topic	Cognitive Processes Decision Making Information Scientists Information Technology Library Role Man Machine Systems Microcomputers Systems Development Technological Advancement
url	https://eric.ed.gov/?id=EJ405791

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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