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🔗 Cryptography 🔗 Cryptography/Computer science

The Cardan grille is a method of writing secret messages using a grid.

🔗 Metalworking

Biomachining is the machining process of using lithotropic bacteria to remove material from metal parts, contrasted with chemical machining methods such as chemical milling and physical machining methods such as milling. Certain bacteria, such as Thiobacillus ferrooxidans and Thiobacillus thiooxidans, which are also used in the mineral refinement process of bioleaching, utilize the chemical energy from oxidation of iron or copper to fix carbon dioxide from the air. A metal object, when placed in a culture fluid containing these metal-metabolizing bacteria, will have material removed from its surface over time.

Biomachining is ideal for micromachining due to its very low material removal rate. In addition, biomachining is less likely to leave an undesirable surface finish; neither chemical nor physical energy is concentrated on the cutting area, so the possibility of a damaged or burned surface is slim.

This process has been successfully used to cut both pure iron and pure copper.

🔗 Philosophy 🔗 Philosophy/Philosophical literature 🔗 Books 🔗 Classical Greece and Rome 🔗 Greece 🔗 Philosophy/Ancient philosophy 🔗 Archaeology

The Derveni papyrus is an Ancient Greek papyrus roll that was discovered in 1962 at the archaeological site of Derveni, near Thessaloniki, in Central Macedonia. A philosophical treatise, the text is an allegorical commentary on an Orphic poem, a theogony concerning the birth of the gods, produced in the circle of the philosopher Anaxagoras. The roll dates to around 340 BC, during the reign of Philip II of Macedon, making it Europe's oldest surviving manuscript. The poem itself was originally composed near the end of the 5th century BC, and "in the fields of Greek religion, the sophistic movement, early philosophy, and the origins of literary criticism it is unquestionably the most important textual discovery of the 20th century." While interim editions and translations were published over the subsequent years, the manuscript in its entirety was first published in 2006.

🔗 Environment 🔗 Automobiles 🔗 Environment/Green vehicle

The Flocken Elektrowagen is a four-wheeled electric car designed by Andreas Flocken (1845–1913), manufactured in 1888 by Maschinenfabrik A. Flocken in Coburg. It is regarded as the first real electric car.

🔗 Computing 🔗 Computing/Computer hardware 🔗 Computing/Early computers

In computer jargon, blinkenlights are diagnostic lights on front panels of old mainframe computers. More recently the term applies to status lights of modern network hardware (modems, network hubs, etc.). Blinkenlights disappeared from more recent computers for a number of reasons, the most important being the fact that with faster CPUs a human can no longer interpret the processes in the computer on the fly. Though more sophisticated UI mechanisms have since been developed, blinkenlights may still be present as additional status indicators and familiar skeuomorphs.

🔗 Military history 🔗 Military history/Fortifications 🔗 Military history/Cold War 🔗 Military history/Balkan military history 🔗 Albania 🔗 Military history/European military history

Concrete military bunkers are a ubiquitous sight in Albania, with an average of 5.7 bunkers for every square kilometer (14.7 per square mile). The bunkers (Albanian: bunkerët) were built during the Hoxhaist government led by the Leader Enver Hoxha from the 1960s to the 1980s, as the government fortified Albania by building more than 750,000 bunkers.

Hoxha's program of "bunkerization" (bunkerizimi) resulted in the construction of bunkers in every corner of the then-People's Socialist Republic of Albania, ranging from mountain passes to city streets. They were never used for their intended purpose during the years that Hoxha governed. The cost of constructing them was a drain on Albania's resources, diverting them away from dealing with the country's housing shortage and poor roads.

The bunkers were abandoned following the dissolution of the communist government in 1992. A few were used in the Insurrection of 1997 and the Kosovo War of 1999. Most are now derelict, though some have been reused for a variety of purposes, including residential accommodation, cafés, storehouses, and shelters for animals or the homeless.

🔗 France 🔗 Celts 🔗 Mythology

Ys (pronounced EESS), also spelled Is or Kêr-Is in Breton, and Ville d'Ys in French, is a mythical city on the coast of Brittany that was swallowed up by the ocean. Most versions of the legend place the city in the Baie de Douarnenez.

🔗 Spirits 🔗 Chicago

Jeppson's Malört is an American brand of bäsk liqueur, a type of brännvin flavored with anise or wormwood. Malört was introduced in Chicago in the 1930s and was long produced by the Carl Jeppson Company. In 2018, as its last employee was retiring, the brand and company name were sold to CH Distillery of Chicago's Pilsen neighborhood. Jeppson's Malört is named after Carl Jeppson, a Swedish immigrant who first distilled and popularized the liquor in Chicago. Malört (literally moth herb) is the Swedish word for wormwood, which is the key ingredient in bäsk. Malört is extremely low in thujone, a chemical once prevalent in absinthe and similar drinks.

Known for its extremely bitter taste, Malört has been described as "infamous" and "the worst booze ever". It can be found in some Chicago-area bars and liquor stores, and is growing in popularity, with sales of Malört shots increasing from 0.4 million in 2007 to 7.9 million in 2022. However, it is rare to find elsewhere in the United States.

🔗 Biography 🔗 Soviet Union 🔗 Russia 🔗 Biography/sports and games 🔗 Russia/sports and games in Russia 🔗 Armenia 🔗 Underwater diving 🔗 Swimming

Shavarsh Vladimiri (Vladimirovich) Karapetyan (Armenian: Շավարշ Կարապետյան; born May 19, 1953) is a retired former Soviet finswimmer, best known for saving the lives of 20 people in a 1976 incident in Yerevan.