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Bibliographic Details
Main Author:	Novak, W.J.
Format:	Recurso educativo Open Access
Language:	en
Published:	1965
Subjects:	Classrooms Controlled Environment Dining Facilities Electricity Elementary Schools Gymnasiums Heating Libraries Mechanical Equipment Thermal Environment Ventilation
Online Access:	https://eric.ed.gov/?id=ED021439
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Table of Contents:

Programmed Controls for an All-Electric School. Novak, W.J. Classrooms Controlled Environment Dining Facilities Electricity Elementary Schools Gymnasiums Heating Libraries Mechanical Equipment Thermal Environment Ventilation Heating and ventilating equipment used in the all-electric upper Elementary School in Bedford, New Hampshire, is controlled to insure optimum comfort while the school is occupied and optimum economy of standby operation while it is not in use. A master clock programs all control functions while its mechanism drives two types of tapes--(1) a 365 day tape, and (2) three 24-hour tapes. The "heating" tape is programmed to accomplish night setbacks of thermostats during unoccupied periods, while the "ventilating" tapes control ventilation fans, exhaust fans, and damper motors. For control purposes, circuiting was divided into four zones--(1) classrooms, (2) gymnasium, (3) cafetorium and offices, and (4) library. To permit unscheduled after-hour use of school facilities without disturbing the punched tapes, manual override switches are provided. (RH)

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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