L'effet Branly livre ses secrets

Enregistré dans:

Détails bibliographiques
Publié dans:	Pour la science No 340
Auteur principal:	Falcon, Eric.
Autres auteurs:	Castaing, Bernard.
Support:	Article de revue
Publié:	2006.
Sujets:	Branly, Edouard, > 1844-1940 Résistance électrique. Articles de périodiques
Résumé:	Il y a plus d'un siècle, Edouard Branly découvrit qu'une étincelle électrique agit à distances sur la conductivité d'un amas de grains métalliques. Ce phénomène, qui fut à la base des premières télécommunications radioélectriques, vient de trouver une explication convaincante.
Lien:	Dans: Pour la science

+ d'infos
Résumé:	Il y a plus d'un siècle, Edouard Branly découvrit qu'une étincelle électrique agit à distances sur la conductivité d'un amas de grains métalliques. Ce phénomène, qui fut à la base des premières télécommunications radioélectriques, vient de trouver une explication convaincante.
Description matérielle:	p. 58-64.
ISSN:	0153-4092

foreach (glob($this->path . "/sess_*") as $filename) { if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); } } return true; } /** * 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) { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, "w")) { $return = fwrite($handle, $data); fclose($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. echo 'Cannot write session to ' . $sessFile . "\n"; return false; } }

// 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 true; } /** * 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, $data) { if ($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); }

* * @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'

Environment & details:

GET Data empty

POST Data empty

Files empty

Cookies empty

Session

Key	Value
__Laminas	Array ( [_REQUEST_ACCESS_TIME] => 1721309061.665 [_VALID] => Array ( [Laminas\Session\Validator\Id] => d9ga4sckr58njp9h6hrinrspup ) )
SessionState	Laminas\Stdlib\ArrayObject Object ( [storage:protected] => Array ( [cookiePath] => / ) [flag:protected] => 2 [iteratorClass:protected] => ArrayIterator [protectedProperties:protected] => Array ( [0] => storage [1] => flag [2] => iteratorClass [3] => protectedProperties ) )
FlashMessenger	Laminas\Stdlib\ArrayObject Object ( [storage:protected] => Array ( ) [flag:protected] => 2 [iteratorClass:protected] => ArrayIterator [protectedProperties:protected] => Array ( [0] => storage [1] => flag [2] => iteratorClass [3] => protectedProperties ) )

Server/Request Data

Key	Value
REDIRECT_VUFIND_ENV	development
REDIRECT_VUFIND_LOCAL_DIR	/home/tamil/vufind/local-uco
REDIRECT_VUFIND_LOCAL_MODULES	Tamil
REDIRECT_STATUS	200
VUFIND_ENV	development
VUFIND_LOCAL_DIR	/home/tamil/vufind/local-uco
VUFIND_LOCAL_MODULES	Tamil
HTTP_ACCEPT	/
HTTP_USER_AGENT	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_ACCEPT_ENCODING	gzip, br, zstd, deflate
HTTP_HOST	vufind.uco.fr
PATH	/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
SERVER_SIGNATURE	<address>Apache/2.4.52 (Ubuntu) Server at vufind.uco.fr Port 80</address>
SERVER_SOFTWARE	Apache/2.4.52 (Ubuntu)
SERVER_NAME	vufind.uco.fr
SERVER_ADDR	193.49.1.3
SERVER_PORT	80
REMOTE_ADDR	3.139.233.17
DOCUMENT_ROOT	/var/www/html
REQUEST_SCHEME	http
CONTEXT_PREFIX	/
CONTEXT_DOCUMENT_ROOT	/home/tamil/vufind/public/
SERVER_ADMIN	webmaster@localhost
SCRIPT_FILENAME	/home/tamil/vufind/public/index.php
REMOTE_PORT	19307
REDIRECT_URL	/Record/236163/Description
GATEWAY_INTERFACE	CGI/1.1
SERVER_PROTOCOL	HTTP/1.1
REQUEST_METHOD	GET
QUERY_STRING
REQUEST_URI	/Record/236163/Description
SCRIPT_NAME	/index.php
PHP_SELF	/index.php
REQUEST_TIME_FLOAT	1721309061.653
REQUEST_TIME	1721309061

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Environment & details:

GET Data empty

POST Data empty

Files empty

Cookies empty

Session

Key	Value
__Laminas	Array ( [_REQUEST_ACCESS_TIME] => 1721309061.665 [_VALID] => Array ( [Laminas\Session\Validator\Id] => d9ga4sckr58njp9h6hrinrspup ) )
SessionState	Laminas\Stdlib\ArrayObject Object ( [storage:protected] => Array ( [cookiePath] => / ) [flag:protected] => 2 [iteratorClass:protected] => ArrayIterator [protectedProperties:protected] => Array ( [0] => storage [1] => flag [2] => iteratorClass [3] => protectedProperties ) )
FlashMessenger	Laminas\Stdlib\ArrayObject Object ( [storage:protected] => Array ( ) [flag:protected] => 2 [iteratorClass:protected] => ArrayIterator [protectedProperties:protected] => Array ( [0] => storage [1] => flag [2] => iteratorClass [3] => protectedProperties ) )

Server/Request Data

Key	Value
REDIRECT_VUFIND_ENV	development
REDIRECT_VUFIND_LOCAL_DIR	/home/tamil/vufind/local-uco
REDIRECT_VUFIND_LOCAL_MODULES	Tamil
REDIRECT_STATUS	200
VUFIND_ENV	development
VUFIND_LOCAL_DIR	/home/tamil/vufind/local-uco
VUFIND_LOCAL_MODULES	Tamil
HTTP_ACCEPT	/
HTTP_USER_AGENT	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_ACCEPT_ENCODING	gzip, br, zstd, deflate
HTTP_HOST	vufind.uco.fr
PATH	/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
SERVER_SIGNATURE	<address>Apache/2.4.52 (Ubuntu) Server at vufind.uco.fr Port 80</address>
SERVER_SOFTWARE	Apache/2.4.52 (Ubuntu)
SERVER_NAME	vufind.uco.fr
SERVER_ADDR	193.49.1.3
SERVER_PORT	80
REMOTE_ADDR	3.139.233.17
DOCUMENT_ROOT	/var/www/html
REQUEST_SCHEME	http
CONTEXT_PREFIX	/
CONTEXT_DOCUMENT_ROOT	/home/tamil/vufind/public/
SERVER_ADMIN	webmaster@localhost
SCRIPT_FILENAME	/home/tamil/vufind/public/index.php
REMOTE_PORT	19307
REDIRECT_URL	/Record/236163/Description
GATEWAY_INTERFACE	CGI/1.1
SERVER_PROTOCOL	HTTP/1.1
REQUEST_METHOD	GET
QUERY_STRING
REQUEST_URI	/Record/236163/Description
SCRIPT_NAME	/index.php
PHP_SELF	/index.php
REQUEST_TIME_FLOAT	1721309061.653
REQUEST_TIME	1721309061

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

L'effet Branly livre ses secrets

Documents similaires

Environment & details:

Environment & details: