The Ulam spiral, or prime spiral (in other languages also called the Ulam Cloth) is a simple method of visualizing the prime numbers that reveals the apparent tendency of certain quadratic polynomials to generate unusually large numbers of primes. It was discovered by the mathematician Stanislaw Ulam in 1963, while he was doodling during the presentation of a “long and very boring paper”[1] at a scientific meeting. Shortly afterwards, in an early application of computer graphics, Ulam with collaborators Myron Stein and Mark Wells used MANIAC II at Los Alamos Scientific Laboratory to produce pictures of the spiral for numbers up to 65,000.[2][1][3] In March of the following year, Martin Gardner wrote about the Ulam spiral in his Mathematical Games column;[1] the Ulam spiral featured on the front cover of the issue of Scientific American in which the column appeared.

The Dunning–Kruger effect is a cognitive bias in which unskilled individuals suffer from illusory superiority, mistakenly rating their ability much higher than average. This bias is attributed to a metacognitive inability of the unskilled to recognize their mistakes.

I just donated to #Wikipedia. Help keep it free! #keepitfree

'a term coined by Jason Mazzone (Associate Professor of Law at Brooklyn Law School) to describe situations where individuals and institutions illegally claim copyright ownership of the public domain and other breaches of copyright law with little or no oversight by authorities or legal consequence for their actions.' Good term (via Nelson)

Wapedia offers the most recent version of every article, which is done by using a combination of a proxy-like behavior and a local article database. This combination provides both high speed and up-to-date articles and low load and traffic for the Wikipedia servers. The copying of data is one way, from Wikipedia to Wapedia, and so Wapedia does not offer the ability to edit pages. Edits must be made to the original page on the Wikipedia site, which propagate through to Wapedia over time. For many Wapedia users on low-powered mobile devices, this is not an issue since their devices are unsuited to editing significant quantities of text.
Standard Wikipedia pages are typically too long for display on these devices, so long pages are divided into smaller chunks to fit into the small displays and the standard side navigation is removed. To reduce the bandwidth requirements, images are scaled down to the resolution of the mobile device. In addition, Wapedia includes a search engine that is independent from Wikipedia servers. Wapedia supports WML and modern XHTML Mobile formats, with an autodetection of the best format for each device. Articles are served from an independent article database.
Unlike many other mobile Wikipedia solutions, Wapedia injects adverts into the Wikipedia articles, either in the HTML or in the applications.

The issue with live mirrors is that they aren't hosting their own copy of the articles, but instead using the live Wikimedia page(s) where our servers get hit for the pageloads on their site. That's against Wikimedia's terms of use, but not a copyright issue. We just politely ask for them to host a local copy (they can have it auto-update once a day or the like to keep it current) and if they don't, we can fiddle around with technical stuff to make it harder for them to use the live page.

Remote loading

Some mirrors load a page from the Wikimedia servers directly every time someone requests a page from them. They alter the text in some way, such as framing it with ads, then send it on to the reader. This is called remote loading, and it is an unacceptable use of Wikimedia server resources. Even remote loading websites with little legitimate traffic can generate significant load on our servers, due to search engine web crawlers.
If you suspect a website is remote loading Wikipedia content, you can report it at meta:Live mirrors.
The appropriate way to run a mirror is to download a dump of the compressed 'pages-article' file and the images from http://download.wikimedia.org/, and then use a modified instance of MediaWiki to generate the required HTML, along with above mentioned copyrights information. Please use Articles, templates, image descriptions, and primary meta-pages (pages-articles.xml.bz2) for mirroring purposes.

Wikipedia, being the awesome site that it is, provides complete dumps of each of its encyclopedias to make the mirroring process quite simple. With a little bit of developery know-how, you can set up your very own Wikipedia mirror, accessible and editable by the public, just like Wikipedia itself. Even if you’re just a normal web surfer without geek credentials, you can set up a local version of Wikipedia right on your computer, accessible at any time, irrespective of blackouts or shutdowns. Let’s get started!