Have a deep view into what people are curious about.

🔗 Chemical and Bio Engineering

In flow chemistry, a chemical reaction is run in a continuously flowing stream rather than in batch production. In other words, pumps move fluid into a tube, and where tubes join one another, the fluids contact one another. If these fluids are reactive, a reaction takes place. Flow chemistry is a well-established technique for use at a large scale when manufacturing large quantities of a given material. However, the term has only been coined recently for its application on a laboratory scale. Often, microreactors are used.

🔗 Mathematics

In number theory, a weird number is a natural number that is abundant but not semiperfect.

In other words, the sum of the proper divisors (divisors including 1 but not itself) of the number is greater than the number, but no subset of those divisors sums to the number itself.

🔗 Biography 🔗 Computing 🔗 Women scientists 🔗 Biography/science and academia 🔗 Women's History

Klára Dán von Neumann (born Klára Dán; 18 August 1911 – 10 November 1963) was a Hungarian-American mathematician, self-taught engineer and computer scientist, noted as one of the first computer programmers. She was the first woman to execute modern-style code on a computer. Klára made significant contributions to the world of programming, including work on the Monte Carlo method, ENIAC, and MANIAC I.

🔗 Toys

A toy balloon or party balloon, is a small balloon mostly used for decoration, advertising and children's toys. Toy balloons are usually made of rubber or aluminized plastic, and inflated with air or helium. They come in a great variety of sizes and shapes, but are most commonly 10 to 30 centimetres in diameter. Toy balloons are not considered to include "sky lanterns" (hot-air paper balloons), although these too are or were used as child toys in some parts of the world.

According to The Journal of the American Medical Association, out of 373 children who died in the US between 1972 and 1992 after choking on children's products, nearly a third choked on latex balloons. The Consumer Products Safety Commission found that children had inhaled latex balloons whole (often while trying to inflate them) or choked on fragments of broken balloons. Parents, a monthly magazine about raising children, advised parents to buy Mylar balloons instead of latex balloons.

🔗 Gloucestershire

Bourton-on-the-Water model village is a scale model village in the grounds of the Old New Inn in Bourton-on-the-Water, Gloucestershire, England. One of the first model villages in the country, it was started in 1936 and completed in 1940. The model represents the core of Bourton-on-the-Water as it appeared in 1936 in 1:9 scale. The model village contains around 100 buildings. It is open to the public and includes exhibitions of other models on smaller scales.

The Bourton-on-the-Water model village was one of the first to be built in England, being completed between 1936 and 1940. Possibly the only earlier example is the Bekonscot model village in Beaconsfield, Buckinghamshire, which is the oldest in the world, being begun in 1929, though not finished until the later 20th century. Bourton-on-the-Water was a fledgling tourist destination in the early 20th century and the landlord of the New Inn, Mr C A Morris, decided to build the model village to attract motorists to his public house. Morris had originally intended to convert the pub's vegetable garden into a village green with a stream with a waterfall and scale replicas of the arch bridges in the village. He soon decided to instead construct a 1:9 scale model of the entire village.

Morris and his wife carefully measured each building in the village and commissioned eight local craftsmen to construct scale replicas of around 100 structures. The craftsmen were construction workers rather than model makers so the methods used were scaled down versions of those used to construct real buildings. The walls are made from ashlars of local limestone, carefully cut to minimise joints and engraved to depict smaller courses of stone. The roofs are covered with slates of Cotswold stone from the Huntsman's Quarry located 3 miles (4.8 km) from the village. The drystone walls are real and have cock and hen or flatstone copings to correspond with the real walls in the village. Two of the buildings have full interiors, visible through perspex panels in their walls: the Church of England parish church of St Lawrence and the village's Baptist chapel. The church has intricate tracery windows and the windows on the models are glazed with real glass. The model village includes examples of 17th- to 19th-century Cotswold architecture. A recording of hymns being sung is played from the village's churches. The roads include model benches and post boxes. Miniature shrubs, including some bonsai trees planted in the 1930s, and pruned real trees represent the trees and bushes of the full-size village and alpine plants the flowers.

The model village covers the core of the historic village stretching from the Old Mill (now home to the Cotswold Motoring Museum) to the New Inn (which is now known as the Old New Inn). This includes High Street, Station Road, Moore Road, Victoria Street and Sherborne Street. The only building not shown in its correct relative position is St Lawrence's church, which would otherwise fall outside of the area covered. A running stream stands in for the River Windrush.

The model village includes a scale model of the model village (which would be at 1:81 scale). This model, in turn, contains a scale model of the model of the model village; being at 1:729 scale this measures around 1 foot (30 cm) in width. This model also contains a scale model (in paint only) of the model of the model of the model village (which would be at 1:6561 scale).

The model village opened to the public on 13 May 1937, as part of the celebrations for the coronation of George VI. The model village was the first tourist attraction in Bourton-on-the-Water; the village has since become one of the main tourist destinations in the Cotswolds. Construction of the models continued until 1940. No significant changes to the architecture have been made since, so the model village preserves Bourton-on-the-Water as it was in 1936, except that shop logos and window displays are updated to reflect changing occupants.

The Morris family maintained and operated the site until 1999 when the model village and the Old New Inn were sold to Julian and Vicki Atherton. In 2004 they purchased a collection of 30 miniature scenes that had been on display in a shop in the village; these form a separate exhibition. The model village became a grade II listed building on 22 March 2013, receiving the same protection as the early 18th-century Old New Inn, which was listed in 1983. In 2014 the Athertons bought a collection of seven 1:32 scale model buildings. These had been built by John Constable in Somerset, part funded by philanthropist Sir Paul Getty. They included a representation of Willy Lott's Cottage, the building depicted in John Constable's The Hay Wain. The collection, out of scale with the model village, were opened as a separate exhibition at the site. In 2016 when renovations were made to the roof of the St Lawrence's Church model, a penny dated 1937 was recovered, which is believed to indicate the date of its construction.

During the Athertons' ownership the village attracted around 100,000 visitors per year and was open every day except Christmas Day. The buildings remain outdoors all year round, while some model villages close in the winter when the models are put into storage. The Athertons employed a full time stone mason to repair damage caused by frost as well as three other employees to repaint the models and maintain the trees and bushes.

In April 2018 the Old New Inn and model village were put up for sale as the Athertons retired. The pub and model village were purchased by Andrew and Julie Lund-Yates, who had lived in Bourton-on-the-Water for 25 years.

• Droste effect known in art as an example of mise en abyme

• Official website

🔗 Military history 🔗 Fashion

A necktie, or simply a tie, is a long piece of cloth, worn, usually by men, for decorative purposes around the neck, resting under the shirt collar and knotted at the throat.

Variants include the ascot, bow, bolo, zipper, cravat, and knit. The modern necktie, ascot, and bow tie are descended from the cravat. Neckties are generally unsized, but may be available in a longer size. In some cultures men and boys wear neckties as part of regular office attire or formal wear. Some women wear them as well but usually not as often as men. Neckties can also be worn as part of a uniform (e.g. military, school, waitstaff), whereas some choose to wear them as everyday clothing attire. Neckties are traditionally worn with the top shirt button fastened, and the tie knot resting between the collar points.

🔗 United States 🔗 Biography 🔗 Internet 🔗 Computing 🔗 Internet culture 🔗 New York City 🔗 Biography/science and academia 🔗 Biography/arts and entertainment 🔗 United States/Massachusetts 🔗 Chicago 🔗 Open 🔗 United States/Massachusetts - Boston 🔗 Open Access

Aaron Hillel Swartz (November 8, 1986 – January 11, 2013) was an American computer programmer, entrepreneur, writer, political organizer, and Internet hacktivist. He was involved in the development of the web feed format RSS, the Markdown publishing format, the organization Creative Commons, and the website framework web.py, and joined the social news site Reddit six months after its founding. He was given the title of co-founder of Reddit by Y Combinator owner Paul Graham after the formation of Not a Bug, Inc. (a merger of Swartz's project Infogami and Redbrick Solutions, a company run by Alexis Ohanian and Steve Huffman). Swartz's work also focused on civic awareness and activism. He helped launch the Progressive Change Campaign Committee in 2009 to learn more about effective online activism. In 2010, he became a research fellow at Harvard University's Safra Research Lab on Institutional Corruption, directed by Lawrence Lessig. He founded the online group Demand Progress, known for its campaign against the Stop Online Piracy Act.

In 2011, Swartz was arrested by Massachusetts Institute of Technology (MIT) police on state breaking-and-entering charges, after connecting a computer to the MIT network in an unmarked and unlocked closet, and setting it to download academic journal articles systematically from JSTOR using a guest user account issued to him by MIT. Federal prosecutors, led by Carmen Ortiz, later charged him with two counts of wire fraud and eleven violations of the Computer Fraud and Abuse Act, carrying a cumulative maximum penalty of $1 million in fines, 35 years in prison, asset forfeiture, restitution, and supervised release. Swartz declined a plea bargain under which he would have served six months in federal prison. Two days after the prosecution rejected a counter-offer by Swartz, he was found dead by suicide in his Brooklyn apartment. In 2013, Swartz was inducted posthumously into the Internet Hall of Fame.

🔗 Egypt

The Siwa Oasis (Arabic: واحة سيوة‎, Wāḥat Sīwah, IPA: [ˈwæːħet ˈsiːwæ]; Coptic: ⲥⲓⲟⲩⲁϩ Siwah; Berber languages: Isiwan, ⵉⵙⵉⵡⴰⵏ ) is an urban oasis in Egypt between the Qattara Depression and the Great Sand Sea in the Western Desert, 50 km (30 mi) east of the Libyan border, and 560 km (348 mi) from Cairo. About 80 km (50 mi) in length and 20 km (12 mi) wide, Siwa Oasis is one of Egypt's most isolated settlements with about 33,000 people, mostly Berbers, who developed a unique and isolated desert culture and a distinct dialect and language different than all other dialects called Siwi, they are also fluent in the Egyptian dialect of Arabic which is called "Masry" meaning Egyptian.

Its fame lies primarily in its ancient role as the home to an oracle of Ammon, the ruins of which are a popular tourist attraction which gave the oasis its ancient name Oasis of Amun Ra. Historically, it was part of Ancient Egypt.

🔗 Technology 🔗 Science Fiction 🔗 Transhumanism

Gray goo (also spelled grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass on Earth while building more of themselves, a scenario that has been called ecophagy ("eating the environment", more literally "eating the habitation"). The original idea assumed machines were designed to have this capability, while popularizations have assumed that machines might somehow gain this capability by accident.

Self-replicating machines of the macroscopic variety were originally described by mathematician John von Neumann, and are sometimes referred to as von Neumann machines or clanking replicators. The term gray goo was coined by nanotechnology pioneer K. Eric Drexler in his 1986 book Engines of Creation. In 2004 he stated, "I wish I had never used the term 'gray goo'." Engines of Creation mentions "gray goo" in two paragraphs and a note, while the popularized idea of gray goo was first publicized in a mass-circulation magazine, Omni, in November 1986.