Random Articles (Page 6)
Have a deep view into what people are curious about.
π Edwin Drake
Edwin Laurentine Drake (March 29, 1819 β November 9, 1880), also known as Colonel Drake, was an American businessman and the first American to successfully drill for oil.
Discussed on
- "Edwin Drake" | 2019-09-25 | 37 Upvotes 9 Comments
π Nelson Rules
Nelson rules are a method in process control of determining if some measured variable is out of control (unpredictable versus consistent). Rules, for detecting "out-of-control" or non-random conditions were first postulated by Walter A. Shewhart in the 1920s. The Nelson rules were first published in the October 1984 issue of the Journal of Quality Technology in an article by Lloyd S Nelson.
The rules are applied to a control chart on which the magnitude of some variable is plotted against time. The rules are based on the mean value and the standard deviation of the samples.
The above eight rules apply to a chart of a variable value.
A second chart, the moving range chart, can also be used but only with rules 1, 2, 3 and 4. Such a chart plots a graph of the maximum value - minimum value of N adjacent points against the time sample of the range.
An example moving range: if N = 3 and values are 1, 3, 5, 3, 3, 2, 4, 5 then the sets of adjacent points are (1,3,5) (3,5,3) (5,3,3) (3,3,2) (3,2,4) (2,4,5) resulting in moving range values of (5-1) (5-3) (5-3) (3-2) (4-2) (5-2) = 4, 2, 2, 1, 2, 3.
Applying these rules indicates when a potential "out of control" situation has arisen. However, there will always be some false alerts and the more rules applied the more will occur. For some processes, it may be beneficial to omit one or more rules. Equally there may be some missing alerts where some specific "out of control" situation is not detected. Empirically, the detection accuracy is good.
Discussed on
- "Nelson Rules" | 2015-07-31 | 219 Upvotes 40 Comments
π Somerton Man
The Somerton Man was an unidentified man whose body was found on 1 December 1948 on the beach at Somerton Park, a suburb of Adelaide, South Australia. The case is also known after the Persian phrase tamΓ‘m shud (Persian: ΨͺΩ Ψ§Ω Ψ΄Ψ―), meaning "is over" or "is finished", which was printed on a scrap of paper found months later in the fob pocket of the man's trousers. The scrap had been torn from the final page of a copy of Rubaiyat of Omar KhayyΓ‘m, authored by 12th-century poet Omar KhayyΓ‘m.
Following a public appeal by police, the book from which the page had been torn was located. On the inside back cover, detectives read through indentations left from previous handwriting: a local telephone number, another unidentified number, and text that resembled a coded message. The text has not been deciphered or interpreted in a way that satisfies authorities on the case.
Since the early stages of the police investigation, the case has been considered "one of Australia's most profound mysteries". There has been intense speculation ever since regarding the identity of the victim, the cause of his death, and the events leading up to it. Public interest in the case remains significant for several reasons: the death occurred at a time of heightened international tensions following the beginning of the Cold War; the apparent involvement of a secret code; the possible use of an undetectable poison; and the inability of authorities to identify the dead man.
On 26 July 2022, Adelaide University professor Derek Abbott, in association with genealogist Colleen M. Fitzpatrick, claimed to have identified the man as Carl "Charles" Webb, an electrical engineer and instrument maker born in 1905, based on genetic genealogy from DNA of the man's hair. South Australia Police and Forensic Science South Australia have not verified the result, but South Australia Police said they were "cautiously optimistic" about it.
π Wojtek
Wojtek (1942 β 2 December 1963; Polish pronunciation:Β [ΛvΙjtΙk]; in English, sometimes spelled Voytek and pronounced as such) was a Syrian brown bear (Ursus arctos syriacus) bought, as a young cub, at a railway station in Hamadan, Iran, by Polish II Corps soldiers who had been evacuated from the Soviet Union. In order to provide for his rations and transportation, he was eventually enlisted officially as a soldier with the rank of private, and was subsequently promoted to corporal.
He accompanied the bulk of the II Corps to Italy, serving with the 22nd Artillery Supply Company. During the Battle of Monte Cassino, in Italy in 1944, Wojtek helped move crates of ammunition and became a celebrity with visiting Allied generals and statesmen. After the war, mustered out of the Polish Army, he was billeted and lived out the rest of his life at the Edinburgh Zoo in Scotland.
Discussed on
- "Wojtek" | 2022-03-27 | 22 Upvotes 1 Comments
π Defenestration
Defenestration (from Old French fenestre, inherited from Latin fenestra) is the act of throwing someone or something out of a window. The term was coined around the time of an incident in Prague Castle in the year 1618 which became the spark that started the Thirty Years' War. This was done in "good Bohemian style"; this referred to the defenestration which had occurred in Prague's City Hall almost 200 years earlier (July 1419), which also on that occasion led to war: the Hussite war. The word comes from the New Latin de- (down from) and fenestra (window or opening). Likewise, it can also refer to the condition of being thrown out of a window, as in "The Defenestration of Ermintrude Inch".
While the act of defenestration connotes the forcible or peremptory removal of an adversary, and the term is sometimes used in just that sense, it also suggests breaking the windows in the process (de- also means removal).
Discussed on
- "Defenestration" | 2020-01-22 | 36 Upvotes 54 Comments
π Kindertransport
The Kindertransport (German for "children's transport") was an organised rescue effort of children from Nazi-controlled territory that took place in 1938β1939 during the nine months prior to the outbreak of the Second World War. The United Kingdom took in nearly 10,000 children, most of them Jewish, from Germany, Austria, Czechoslovakia, Poland, and the Free City of Danzig. The children were placed in British foster homes, hostels, schools, and farms. Often they were the only members of their families who survived the Holocaust that was to come. The programme was supported, publicised, and encouraged by the British government, which waived the visa immigration requirements that were not within the ability of the British Jewish community to fulfil. The British government placed no numerical limit on the programme; it was the start of the Second World War that brought it to an end, by which time about 10,000 kindertransport children had been brought to the country.
Smaller numbers of children were taken in via the programme by the Netherlands, Belgium, France, Sweden, and Switzerland. The term "kindertransport" may also be applied to the rescue of mainly Jewish children from Nazi German territory to the Netherlands, Belgium, and France. An example is the 1,000 Chateau de La Hille children who went to Belgium. However, most often the term is restricted to the organised programme of the United Kingdom.
The Central British Fund for German Jewry (now World Jewish Relief) was established in 1933 to support in whatever way possible the needs of Jews in Germany and Austria.
In the United States, the WagnerβRogers Bill was introduced in Congress, which would have increased the quota of immigrants by bringing to the U.S. a total of 20,000 refugee children, but it did not pass.
Discussed on
- "Kindertransport" | 2024-03-19 | 13 Upvotes 1 Comments
π Bogdanov affair
The Bogdanov affair was an academic dispute regarding the legitimacy of a series of theoretical physics papers written by French twins Igor and Grichka Bogdanov (alternately spelt Bogdanoff). These papers were published in reputable scientific journals, and were alleged by their authors to culminate in a proposed theory for describing what occurred at and before the Big Bang.
The controversy began in 2002, with an allegation that the twins, celebrities in France for hosting science-themed TV shows, had obtained PhDs with nonsensical work. Rumours spread on Usenet newsgroups that their work was a deliberate hoax intended to target weaknesses in the peer review system that physics journals use to select papers for publication. While the Bogdanov brothers continued to defend the veracity of their work, the debate over whether or not it represented a contribution to physics spread from Usenet to many other Internet forums, eventually receiving coverage in the mainstream media. A Centre national de la recherche scientifique (CNRS) internal report later concluded that their theses had no scientific value.
The incident prompted criticism of the Bogdanovs' approach to science popularization, led to multiple lawsuits, and provoked reflection among physicists as to how and why the peer review system can fail.
Discussed on
- "Bogdanov affair" | 2016-09-24 | 131 Upvotes 63 Comments
π Core War
Core War is a 1984 programming game created by D. G. Jones and A. K. Dewdney in which two or more battle programs (called "warriors") compete for control of a virtual computer. These battle programs are written in an abstract assembly language called Redcode.
Discussed on
- "Core War, a very old game about programming" | 2023-08-14 | 66 Upvotes 14 Comments
- "Core War" | 2022-02-11 | 236 Upvotes 50 Comments
π Feb 22 marks death anniversary of Sophie Scholl (9 May 1921β22 February 1943)
Sophia Magdalena Scholl (9 May 1921 β 22 February 1943) was a German student and anti-Nazi political activist, active within the White Rose non-violent resistance group in Nazi Germany.
She was convicted of high treason after having been found distributing anti-war leaflets at the University of Munich (LMU) with her brother, Hans. For her actions, she was executed by guillotine. Since the 1970s, Scholl has been extensively commemorated for her anti-Nazi resistance work.
Discussed on
- "Feb 22 marks death anniversary of Sophie Scholl (9 May 1921β22 February 1943)" | 2023-02-22 | 48 Upvotes 11 Comments
π M-Pesa β a mobile-phone based money transfer and microfinancing service
M-Pesa (M for mobile, pesa is Swahili for money) is a mobile phone-based money transfer, financing and microfinancing service, launched in 2007 by Vodafone for Safaricom and Vodacom, the largest mobile network operators in Kenya and Tanzania. It has since expanded to Afghanistan, South Africa, India and in 2014 to Romania and in 2015 to Albania. M-Pesa allows users to deposit, withdraw, transfer money and pay for goods and services (Lipa na M-Pesa) easily with a mobile device.
The service allows users to deposit money into an account stored on their cell phones, to send balances using PIN-secured SMS text messages to other users, including sellers of goods and services, and to redeem deposits for regular money. Users are charged a small fee for sending and withdrawing money using the service.
M-Pesa is a branchless banking service; M-Pesa customers can deposit and withdraw money from a network of agents that includes airtime resellers and retail outlets acting as banking agents.
M-Pesa has spread quickly, and by 2010 had become the most successful mobile-phone-based financial service in the developing world. By 2012, a stock of about 17 million M-Pesa accounts had been registered in Kenya. By June 2016, a total of 7 million M-Pesa accounts have been opened in Tanzania by Vodacom. The service has been lauded for giving millions of people access to the formal financial system and for reducing crime in otherwise largely cash-based societies.
Discussed on
- "M-Pesa β a mobile-phone based money transfer and microfinancing service" | 2015-11-23 | 70 Upvotes 37 Comments