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🔗 Mathematics

Hilbert's paradox of the Grand Hotel (colloquial: Infinite Hotel Paradox or Hilbert's Hotel) is a thought experiment which illustrates a counterintuitive property of infinite sets. It is demonstrated that a fully occupied hotel with infinitely many rooms may still accommodate additional guests, even infinitely many of them, and this process may be repeated infinitely often. The idea was introduced by David Hilbert in a 1924 lecture "Über das Unendliche", reprinted in (Hilbert 2013, p.730), and was popularized through George Gamow's 1947 book One Two Three... Infinity.

🔗 Technology 🔗 Environment 🔗 Science Fiction 🔗 Astronomy 🔗 Transhumanism 🔗 Futures studies 🔗 Energy

The Kardashev scale is a method of measuring a civilization's level of technological advancement based on the amount of energy they are able to use. The measure was proposed by Soviet astronomer Nikolai Kardashev in 1964. The scale has three designated categories:

• A Type I civilization, also called a planetary civilization—can use and store all of the energy available on its planet.
• A Type II civilization, also called a stellar civilization—can use and control energy at the scale of its stellar system.
• A Type III civilization, also called a galactic civilization—can control energy at the scale of its entire host galaxy.

🔗 United States 🔗 Internet 🔗 Law 🔗 Freedom of speech 🔗 Microsoft

Microsoft v. MikeRoweSoft was a legal dispute between Microsoft and a Canadian Belmont High School student named Mike Rowe over the domain name "MikeRoweSoft.com". Microsoft argued that their trademark had been infringed because of the phonetic resemblance between "Microsoft" and "MikeRoweSoft".

The case received international press attention following Microsoft's perceived heavy-handed approach to a 12th grade student's part-time web design business and the subsequent support that Rowe received from the online community. A settlement was eventually reached, with Rowe granting ownership of the domain to Microsoft in exchange for an Xbox and additional compensation.

🔗 Professional sound production

The loudness war (or loudness race) refers to the trend of increasing audio levels in recorded music, which reduces audio fidelity, and according to many critics, listener enjoyment. Increasing loudness was first reported as early as the 1940s, with respect to mastering practices for 7" singles. The maximum peak level of analog recordings such as these is limited by varying specifications of electronic equipment along the chain from source to listener, including vinyl and Compact Cassette players. The issue garnered renewed attention starting in the 1990s with the introduction of digital signal processing capable of producing further loudness increases.

With the advent of the Compact Disc (CD), music is encoded to a digital format with a clearly defined maximum peak amplitude. Once the maximum amplitude of a CD is reached, loudness can be increased still further through signal processing techniques such as dynamic range compression and equalization. Engineers can apply an increasingly high ratio of compression to a recording until it more frequently peaks at the maximum amplitude. In extreme cases, efforts to increase loudness can result in clipping and other audible distortion. Modern recordings that use extreme dynamic range compression and other measures to increase loudness therefore can sacrifice sound quality to loudness. The competitive escalation of loudness has led music fans and members of the musical press to refer to the affected albums as "victims of the loudness war."

🔗 Internet culture

I Can Eat Glass was a linguistic project documented on the early Web by then-Harvard student Ethan Mollick. The objective was to provide speakers with translations of the phrase "I can eat glass, it does not hurt me" from a wide variety of languages; the phrase was chosen because of its unorthodox nature. Mollick's original page disappeared in or about June 2004.

As Mollick explained, visitors to a foreign country have "an irresistible urge" to say something in that language, and whatever they say usually marks them as tourists immediately. Saying "I can eat glass, it does not hurt me", however, ensures that the speaker "will be viewed as an insane native, and treated with dignity and respect".

The project grew to considerable size since web surfers were invited to submit translations. The phrase was translated into over 150 languages, including some that are fictional or invented, as well as into code from various computer languages. It became an Internet meme.

🔗 Cryptography 🔗 Cryptography/Computer science

In cryptography, the socialist millionaire problem is one in which two millionaires want to determine if their wealth is equal without disclosing any information about their riches to each other. It is a variant of the Millionaire's Problem whereby two millionaires wish to compare their riches to determine who has the most wealth without disclosing any information about their riches to each other.

It is often used as a cryptographic protocol that allows two parties to verify the identity of the remote party through the use of a shared secret, avoiding a man-in-the-middle attack without the inconvenience of manually comparing public key fingerprints through an outside channel. In effect, a relatively weak password/passphrase in natural language can be used.

🔗 Television 🔗 Food and drink 🔗 Japan

"The staff ate it later" (Japanese: この後、スタッフが美味しくいただきました, Hepburn: Kono ato, sutaffu ga oishiku itadakimashita; More fully translated as the staff ate and enjoyed it later) is a caption shown on screen in a Japanese TV program to indicate that the food presented during the program was not thrown away after filming. Some have questioned the authenticity of displaying the caption.

🔗 Computing 🔗 Computing/Software 🔗 Star Wars

In programming jargon, Yoda conditions (also called Yoda notation) is a programming style where the two parts of an expression are reversed from the typical order in a conditional statement. A Yoda condition places the constant portion of the expression on the left side of the conditional statement. The name for this programming style is derived from the Star Wars character named Yoda, who speaks English with a non-standard syntax.

Yoda conditions are part of the Symfony, and the WordPress coding standards.