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1

Fundamentos de matemáticas para electricidad y electrónica por Singer, Bertrand B.

London : McGraw-Hill, 1966.

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Seleccione el número de resultado 2
2

Fundamentos de matemáticas para electricidad y electrónica por Singer, Bertrand B.

New York : McGraw-Hill, 1966.

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Seleccione el número de resultado 3
3

Fundamentos de matemáticas para electricidad y electrónica por Singer, Bertrand B.

Madrid : McGraw-Hill, 1966.

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Whoops! There was an error.

Whoops \ Exception \ ErrorException (E_WARNING)

fopen(/tmp/vufind_sessions/sess_c7q1c1uh108r9qmmin5mhl3or9): Failed to open stream: No space left on device

Whoops\Exception\ErrorException thrown with message "fopen(/tmp/vufind_sessions/sess_c7q1c1uh108r9qmmin5mhl3or9): Failed to open stream: No space left on device" Stacktrace: #5 Whoops\Exception\ErrorException in /usr/local/vufind/module/VuFind/src/VuFind/Session/File.php:158 #4 fopen in /usr/local/vufind/module/VuFind/src/VuFind/Session/File.php:158 #3 VuFind\Session\File:saveSession in /usr/local/vufind/module/VuFind/src/VuFind/Session/AbstractBase.php:193 #2 VuFind\Session\AbstractBase:write in [internal]:0 #1 session_write_close in /usr/local/vufind/vendor/laminas/laminas-session/src/SessionManager.php:242 #0 Laminas\Session\SessionManager:writeClose in [internal]:0

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5

Whoops\Exception\ErrorException

…/module/VuFind/src/VuFind/Session/File.php158

4

fopen

…/module/VuFind/src/VuFind/Session/File.php158

3

VuFind\Session\File saveSession

…/module/VuFind/src/VuFind/Session/AbstractBase.php193

2

VuFind\Session\AbstractBase write

[internal]0

1

session_write_close

…/vendor/laminas/laminas-session/src/SessionManager.php242

0

Laminas\Session\SessionManager writeClose

[internal]0

Open: /usr/local/vufind/module/VuFind/src/VuFind/Session/File.php

        foreach (glob($this->path . '/sess_*') as $filename) {
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                ftruncate($handle, strlen($data));
                fflush($handle);
                flock($handle, LOCK_UN);
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            fclose($handle);
            if ($return !== false) {
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Arguments

              "fopen(/tmp/vufind_sessions/sess_c7q1c1uh108r9qmmin5mhl3or9): Failed to open stream: No space left on device"

          

Open: /usr/local/vufind/module/VuFind/src/VuFind/Session/File.php

        foreach (glob($this->path . '/sess_*') as $filename) {
            if (filemtime($filename) + $maxlifetime < time()) {
                unlink($filename);
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        return true;
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    /**
     * A function that is called internally when session data is to be saved.
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     *
     * @return bool
     */
    protected function saveSession($sessId, $data): bool
    {
        $sessFile = $this->path . '/sess_' . $sessId;
        if ($handle = fopen($sessFile, 'w')) {
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                flock($handle, LOCK_UN);
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            fclose($handle);
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        // 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.

Open: /usr/local/vufind/module/VuFind/src/VuFind/Session/AbstractBase.php

        // 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
     */
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    /**
     * A function that is called internally when session data is to be saved.
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     * @param string $sessId The current session ID
     * @param string $data   The session data to write
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     * @return bool
     */
    abstract protected function saveSession($sessId, $data): bool;
}

Open: [internal]

Open: /usr/local/vufind/vendor/laminas/laminas-session/src/SessionManager.php

     *
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        //
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        // session_write_close() operation, no changes made to it will be
        // flushed to the session handler. As such, we now mark the storage
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            $storage->fromArray($_SESSION);
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    public function setName($name)
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Open: [internal]

Environment & details:

GET Data

Key	Value
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POST Data empty

Files empty

Cookies

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ui	"standard"
VUFIND_SESSION	"c7q1c1uh108r9qmmin5mhl3or9"
language	"es"

Session

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__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1738396020.6711 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "c7q1c1uh108r9qmmin5mhl3or9" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#906}
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FlashMessenger	Laminas\Stdlib\ArrayObject {#1269}
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REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
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VUFIND_ENV	"development"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
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HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
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HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"catalogo.bibliotecas.unlp.edu.ar"
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REMOTE_ADDR	"3.138.116.124"
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REQUEST_SCHEME	"https"
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CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"webmaster@bibliotecas.unlp.edu.ar"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
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REDIRECT_QUERY_STRING	"id=dfi.3315&search=versions"
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REQUEST_URI	"/Search/Versions?id=dfi.3315&search=versions"
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PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1738396020.6609
REQUEST_TIME	1738396020

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Cannot write session to /tmp/vufind_sessions/sess_c7q1c1uh108r9qmmin5mhl3or9 Whoops! There was an error.

Whoops \ Exception \ ErrorException (E_WARNING)

session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Whoops\Exception\ErrorException thrown with message "session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)" Stacktrace: #2 Whoops\Exception\ErrorException in /usr/local/vufind/vendor/laminas/laminas-session/src/SessionManager.php:242 #1 session_write_close in /usr/local/vufind/vendor/laminas/laminas-session/src/SessionManager.php:242 #0 Laminas\Session\SessionManager:writeClose in [internal]:0

Application frames (0) All frames (3)

2

Whoops\Exception\ErrorException

…/vendor/laminas/laminas-session/src/SessionManager.php242

1

session_write_close

…/vendor/laminas/laminas-session/src/SessionManager.php242

0

Laminas\Session\SessionManager writeClose

[internal]0

Open: /usr/local/vufind/vendor/laminas/laminas-session/src/SessionManager.php

     *
     * @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();
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    /**
     * Attempt to set the session name
     *
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     * 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'

Arguments

              "session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)"

          

Open: /usr/local/vufind/vendor/laminas/laminas-session/src/SessionManager.php

     *
     * @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);
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    /**
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     */
    public function setName($name)
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            throw new Exception\InvalidArgumentException(
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Open: [internal]

Environment & details:

GET Data

Key	Value
id	"dfi.3315"
search	"versions"

POST Data empty

Files empty

Cookies

Key	Value
ui	"standard"
VUFIND_SESSION	"c7q1c1uh108r9qmmin5mhl3or9"
language	"es"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1738396020.6711 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "c7q1c1uh108r9qmmin5mhl3or9" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#906}
Search	Laminas\Stdlib\ArrayObject {#1187}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1269}
SessionHelper	Laminas\Stdlib\ArrayObject {#1581}

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REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
REDIRECT_STATUS	"200"
VUFIND_ENV	"development"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"ui=standard; VUFIND_SESSION=c7q1c1uh108r9qmmin5mhl3or9; language=es"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"catalogo.bibliotecas.unlp.edu.ar"
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 catalogo.bibliotecas.unlp.edu.ar Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.52 (Ubuntu)"
SERVER_NAME	"catalogo.bibliotecas.unlp.edu.ar"
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SERVER_PORT	"443"
REMOTE_ADDR	"3.138.116.124"
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CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"webmaster@bibliotecas.unlp.edu.ar"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"10015"
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REDIRECT_QUERY_STRING	"id=dfi.3315&search=versions"
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	"id=dfi.3315&search=versions"
REQUEST_URI	"/Search/Versions?id=dfi.3315&search=versions"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1738396020.6609
REQUEST_TIME	1738396020

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Versión - Fundamentos de matemáticas para electricidad y electrónica

Fundamentos de matemáticas para electricidad y electrónica por Singer, Bertrand B.

Fundamentos de matemáticas para electricidad y electrónica por Singer, Bertrand B.

Fundamentos de matemáticas para electricidad y electrónica por Singer, Bertrand B.

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