Auteur zoekresultaten

Maurits Cornelis Escher

Maurits Cornelis (Mauk) Escher (Leeuwarden, 17 juni 1898 – Hilversum, 27 maart 1972) was een Nederlandse kunstenaar, die bekend is om zijn houtsneden, houtgravures en lithografieën, waarin hij vaak speelde met wiskundige principes. Hij signeerde zijn werk met MCE.

Zijn gravures verbeelden vaak onmogelijke constructies, studies van oneindigheid en in elkaar passende meetkundige patronen (vlakverdelingen) die geleidelijk in volstrekt verschillende vormen veranderen. Enkele zeer bekende voorstellingen die hij tekende zijn ontworpen rond onmogelijke objecten zoals de Penrose-trap. Pas in de jaren vijftig van de twintigste eeuw kreeg hij in bredere kring erkenning als kunstenaar, vooral in de VS. Kristallografen en wiskundigen ontdekten in zijn werk symmetrieën en thema's uit hun vakgebieden. Eschers grafische werk wordt vanaf 1960 in wetenschappelijke (leer)boeken gebruikt.

In de jaren zestig werd zijn werk – tot zijn verbazing – vanwege de fantastische parallelle werelden door hippies en popsterren omarmd. Lees meer op Wikipedia

Escher & schatten uit de islam

door Escher, Maurits Cornelis 1898-1972
Jaar 2013

Boek

M.C. Escher, grafiek en tekeningen

door Escher, Maurits Cornelis 1898-1972
Jaar 2008

Boek

M.C. Escher, grafiek en tekeningen

door Escher, Maurits Cornelis 1898-1972
Jaar 2010

Boek

M.C. Escher pop-ups

door McCarthy, Courtney Watson, Escher, Maurits Cornelis 1898-1972, Nijs, Paulina de 1969-
Jaar 2011

Boek

De magie van M.C. Escher

door Escher, Maurits Cornelis 1898-1972, Landshoff, Andreas, Elffers, Joost 1946-, Ginneken, Cornelis van, Schaafsma, Evan
Jaar 2003

Boek

foreach (glob($this->getPath() . "/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 $sess_id The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sess_id, $data) { $sess_file = $this->getPath() . '/sess_' . $sess_id; if ($fp = fopen($sess_file, "w")) { $return = fwrite($fp, $data); fclose($fp); 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 ' . $sess_file . "\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 $sess_id The current session ID * @param string $data The session data to write * * @return bool */ public function write($sess_id, $data) { if ($this->writesDisabled) { return true; } return $this->saveSession($sess_id, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sess_id The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sess_id, $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

Key	Value
author	Escher, Maurits Cornelis 1898-1972

POST Data empty

Files empty

Key	Value
language	nl
VUFIND_SESSION	lq349id6qdalbo658s9cl64elj

Session

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FlashMessenger	Zend\Stdlib\ArrayObject Object ( [storage:protected] => Array ( ) [flag:protected] => 2 [iteratorClass:protected] => ArrayIterator [protectedProperties:protected] => Array ( [0] => storage [1] => flag [2] => iteratorClass [3] => protectedProperties ) )

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Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Maurits Cornelis Escher

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Environment & details: