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Bibliographic Details
Main Author:	YEATER, L.W.
Format:	Recurso educativo Open Access
Language:	en
Published:	1967
Subjects:	Biology Discovery Processes Educational Media Educational Planning Field Trips Instructional Materials Learning Theories Marine Biology Motivation Techniques Oceanography Outdoor Education Resource Materials Science Consultants Science Instruction Sequential Learning Slow Learners Student Interests Teaching Methods
Online Access:	https://eric.ed.gov/?id=ED020830
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A FIELD EXPERIENCE--A WHY, A HOW. YEATER, L.W. Biology Discovery Processes Educational Media Educational Planning Field Trips Instructional Materials Learning Theories Marine Biology Motivation Techniques Oceanography Outdoor Education Resource Materials Science Consultants Science Instruction Sequential Learning Slow Learners Student Interests Teaching Methods THE CARTERET COUNTY MARINE SCIENCE PROJECT OFFERS THE SCIENCE TEACHER THE MEANS OF PROVIDING A DIRECTED DISCOVERY, FIELD-ORIENTED APPROACH TO THE STUDY OF OCEANOLOGY. SPECIALISTS PROVIDE AUDIO-VISUAL MATERIALS, AND DO THE PLANNING, ORGANIZATION, AND DIRECTION OF PRACTIAL FIELD EXPERIENCES. FOLLOWING THE FIELD EXPERIENCE, A MARINE SCIENCE PROJECT REPRESENTATIVE WILL USUALLY RETURN TO THE CLASSROOM TO REVIEW HIGHLIGHTS OF THE TRIP, DISCUSS ANSWERS TO FIELD PROBLEMS PREVIOUSLY PRESENTED, AND ESTABLISH AREAS WHICH MIGHT PROFITABLY BE INVESTIGATED ON FUTURE FIELD EXERCISES. THE MARINE SCIENCE PROJECT ALSO PROVIDES THE INDIVIDUAL TEACHER WITH A SOURCE OF A WIDE RANGE OF OCEANOLOGICAL MATERIALS, IN ADDITION TO A COMPLETE LIBRARY AND PERIODICAL FILE. (DA)

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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