Video Display Terminals: Radiation Issues.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Murray, William E.
Format:	Recurso educativo Open Access
Language:	en
Published:	1985
Subjects:	Display Systems Electronic Equipment Hazardous Materials Human Factors Engineering Input Output Devices Labor Standards Man Machine Systems Occupational Safety and Health Problems Radiation Radiation Effects Work Environment
Online Access:	Acceder al recurso
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author	Murray, William E.
author_facet	Murray, William E. Murray, William E.
collection	Education Resources Information Center
contents	Video Display Terminals: Radiation Issues. Murray, William E. Display Systems Electronic Equipment Hazardous Materials Human Factors Engineering Input Output Devices Labor Standards Man Machine Systems Occupational Safety and Health Problems Radiation Radiation Effects Work Environment Discusses information gathered in past few years related to health effects of video display terminals (VDTs) with particular emphasis given to issues raised by VDT users. Topics covered include radiation emissions, health concerns, radiation surveys, occupational radiation exposure standards, and long-term risks. (17 references) (EJS)
format	Recurso educativo Open Access
id	eric_EJ336218
institution	ERIC Institute of Education Sciences
language	en
publishDate	1985
record_format	eric
spellingShingle	Video Display Terminals: Radiation Issues. Murray, William E. Display Systems Electronic Equipment Hazardous Materials Human Factors Engineering Input Output Devices Labor Standards Man Machine Systems Occupational Safety and Health Problems Radiation Radiation Effects Work Environment Video Display Terminals: Radiation Issues. Murray, William E. Display Systems Electronic Equipment Hazardous Materials Human Factors Engineering Input Output Devices Labor Standards Man Machine Systems Occupational Safety and Health Problems Radiation Radiation Effects Work Environment Discusses information gathered in past few years related to health effects of video display terminals (VDTs) with particular emphasis given to issues raised by VDT users. Topics covered include radiation emissions, health concerns, radiation surveys, occupational radiation exposure standards, and long-term risks. (17 references) (EJS)
title	Video Display Terminals: Radiation Issues.
topic	Display Systems Electronic Equipment Hazardous Materials Human Factors Engineering Input Output Devices Labor Standards Man Machine Systems Occupational Safety and Health Problems Radiation Radiation Effects Work Environment
url	https://eric.ed.gov/?id=EJ336218

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// 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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