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๐ Long-term nuclear waste warning messages
Long-term nuclear waste warning messages are intended to deter human intrusion at nuclear waste repositories in the far future, within or above the order of magnitude of 10,000 years. Nuclear semiotics is an interdisciplinary field of research, first done by the American Human Interference Task Force in 1981.
A 1993 report from Sandia National Laboratories recommended that such messages be constructed at several levels of complexity. They suggested that the sites should include foreboding physical features which would immediately convey to future visitors that the site was both man-made and dangerous, as well as providing pictographic information attempting to convey some details of the danger, and written explanations for those able to read it.
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- "Long-term nuclear waste warning messages" | 2024-04-03 | 76 Upvotes 90 Comments
- "Long-Term Nuclear Waste Warning Messages" | 2022-06-17 | 14 Upvotes 9 Comments
๐ Happy Petrov day
Stanislav Yevgrafovich Petrov (Russian: ะกัะฐะฝะธัะปะฐฬะฒ ะะฒะณัะฐฬัะพะฒะธั ะะตััะพฬะฒ; 7 September 1939 โ 19 May 2017) was a lieutenant colonel of the Soviet Air Defence Forces who played a key role in the 1983 Soviet nuclear false alarm incident. On 26 September 1983, three weeks after the Soviet military had shot down Korean Air Lines Flight 007, Petrov was the duty officer at the command center for the Oko nuclear early-warning system when the system reported that a missile had been launched from the United States, followed by up to five more. Petrov judged the reports to be a false alarm, and his decision to disobey orders, against Soviet military protocol, is credited with having prevented an erroneous retaliatory nuclear attack on the United States and its NATO allies that could have resulted in large-scale nuclear war. Investigation later confirmed that the Soviet satellite warning system had indeed malfunctioned.
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- "It's Stanislav Petrov day โ40yrs ago he saved world by suppressing a tech glitch" | 2023-09-26 | 129 Upvotes 7 Comments
- "Happy Petrov day" | 2013-09-26 | 138 Upvotes 30 Comments
๐ CRDT: Conflict-free replicated data type
In distributed computing, a conflict-free replicated data type (CRDT) is a data structure which can be replicated across multiple computers in a network, where the replicas can be updated independently and concurrently without coordination between the replicas, and where it is always mathematically possible to resolve inconsistencies which might result.
The CRDT concept was formally defined in 2011 by Marc Shapiro, Nuno Preguiรงa, Carlos Baquero and Marek Zawirski. Development was initially motivated by collaborative text editing and mobile computing. CRDTs have also been used in online chat systems, online gambling, and in the SoundCloud audio distribution platform. The NoSQL distributed databases Redis, Riak and Cosmos DBย have CRDT data types.
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- "CRDT: Conflict-free replicated data type" | 2019-11-06 | 229 Upvotes 63 Comments
๐ ACTA will force border searches of laptops, smartphones for pirated content
The Anti-Counterfeiting Trade Agreement (ACTA) was a proposed multilateral treaty for the purpose of establishing international standards for intellectual property rights enforcement. The agreement aims to establish an international legal framework for targeting counterfeit goods, generic medicines and copyright infringement on the Internet, and would create a new governing body outside existing forums, such as the World Trade Organization, the World Intellectual Property Organization, and the United Nations.
The agreement was signed in October 2011 by Australia, Canada, Japan, Morocco, New Zealand, Singapore, South Korea, and the United States. In 2012, Mexico, the European Union and 22 countries that are member states of the European Union signed as well. One signatory (Japan) has ratified (formally approved) the agreement, which would come into force in countries that ratified it after ratification by six countries.
Industrial groups with interests in copyright, trademarks and other types of intellectual property said that ACTA was a response to "the increase in global trade of counterfeit goods and pirated copyright protected works". Organizations such as the Motion Picture Association of America and International Trademark Association are understood to have had a significant influence over the ACTA agenda.
Organisations representing citizens and non-governmental interests argued that ACTA could infringe fundamental rights including freedom of expression and privacy. ACTA has also been criticised by Doctors Without Borders for endangering access to medicines in developing countries. The nature of negotiations was criticized as secretive and has excluded non-governmental organization, developing countries and the general public from the agreement's negotiation process and it has been described as policy laundering by critics including the Electronic Frontier Foundation and the Entertainment Consumers Association.
The signature of the EU and many of its member states resulted in widespread protests across Europe. European Parliament rapporteur Kader Arif resigned. His replacement, British MEP David Martin, recommended that the Parliament should reject ACTA, stating: "The intended benefits of this international agreement are far outweighed by the potential threats to civil liberties". On 4 July 2012, the European Parliament declined its consent, effectively rejecting it, 478 votes to 39, with 165 abstentions.
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- "ACTA will force border searches of laptops, smartphones for pirated content" | 2012-01-22 | 412 Upvotes 191 Comments
๐ Beer distribution game
The beer distribution game (also known as the beer game) is a type of gamification that is used to experience typical coordination problems of a supply chain process. It reflects a role-play simulation where several participants play with each other. The game represents a supply chain with a non-coordinated process where problems arise due to lack of information sharing. This game outlines the importance of information sharing, supply chain management and collaboration throughout a supply chain process. Due to lack of information, suppliers, manufacturers, sales people and customers often have an incomplete understanding of what the real demand of an order is. The most interesting part of the game is that each group has no control over another part of the supply chain. Therefore, each group has only significant control over their own part of the supply chain. Each group can highly influence the entire supply chain by ordering too much or too little which can lead to a bullwhip effect. Therefore, the order taking of a group also highly depends on decisions of the other groups.
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- "Beer Distribution Game" | 2020-03-23 | 229 Upvotes 47 Comments
- "Beer distribution game" | 2017-11-25 | 21 Upvotes 4 Comments
๐ Doomsday rule
The Doomsday rule is an algorithm of determination of the day of the week for a given date. It provides a perpetual calendar because the Gregorian calendar moves in cycles of 400 years. The algorithm for mental calculation was devised by John Conway in 1973, drawing inspiration from Lewis Carroll's perpetual calendar algorithm. It takes advantage of each year having a certain day of the week, called the doomsday, upon which certain easy-to-remember dates fall; for example, 4/4, 6/6, 8/8, 10/10, 12/12, and the last day of February all occur on the same day of the week in any year. Applying the Doomsday algorithm involves three steps: Determination of the anchor day for the century, calculation of the doomsday for the year from the anchor day, and selection of the closest date out of those that always fall on the doomsday, e.g., 4/4 and 6/6, and count of the number of days (modulo 7) between that date and the date in question to arrive at the day of the week. The technique applies to both the Gregorian calendar and the Julian calendar, although their doomsdays are usually different days of the week.
The algorithm is simple enough that it can be computed mentally. Conway can usually give the correct answer in under two seconds. To improve his speed, he practices his calendrical calculations on his computer, which is programmed to quiz him with random dates every time he logs on.
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- "Doomsday rule" | 2016-03-26 | 31 Upvotes 2 Comments
- "Doomsday rule: calculate the day for any date" | 2014-08-10 | 125 Upvotes 30 Comments
- "Doomsday rule" | 2013-12-11 | 10 Upvotes 2 Comments
๐ A True Story
A True Story (Ancient Greek: แผฮปฮทฮธแฟ ฮดฮนฮทฮณฮฎฮผฮฑฯฮฑ, Alฤthฤ diฤgฤmata; Latin: Vera Historia or Latin: Verae Historiae) is a novel written in the second century AD by Lucian of Samosata, a Greek-speaking author of Assyrian descent. The novel is a satire of outlandish tales which had been reported in ancient sources, particularly those which presented fantastic or mythical events as if they were true. It is Lucian's best-known work.
It is the earliest known work of fiction to include travel to outer space, alien lifeforms, and interplanetary warfare. As such, A True Story has been described as "the first known text that could be called science fiction". However the work does not fit into typical literary genres: its multilayered plot and characters have been interpreted as science fiction, fantasy, satire or parody, and have been the subject of much scholarly debate.
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- "A True Story" | 2018-10-15 | 525 Upvotes 72 Comments
๐ Toba catastrophe theory
The Toba supereruption was a supervolcanic eruption that occurred about 75,000 years ago at the site of present-day Lake Toba in Sumatra, Indonesia. It is one of the Earth's largest known eruptions. The Toba catastrophe theory holds that this event caused a global volcanic winter of six to ten years and possibly a 1,000-year-long cooling episode.
In 1993, science journalist Ann Gibbons posited that a population bottleneck occurred in human evolution about 70,000 years ago, and she suggested that this was caused by the eruption. Geologist Michael R. Rampino of New York University and volcanologist Stephen Self of the University of Hawaii at Manoa support her suggestion. In 1998, the bottleneck theory was further developed by anthropologist Stanley H. Ambrose of the University of Illinois at UrbanaโChampaign. Both the link and global winter theories are controversial. The Toba event is the most closely studied supereruption.
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- "Toba Catastrophe Theory" | 2021-12-18 | 49 Upvotes 17 Comments
- "Toba catastrophe theory" | 2015-12-24 | 46 Upvotes 1 Comments
- "Toba catastrophe theory" | 2012-10-19 | 66 Upvotes 17 Comments
๐ Extreme Ironing
Extreme ironing (also called EI) is an extreme sport in which people take ironing boards to remote locations and iron items of clothing. According to the Extreme Ironing Bureau, extreme ironing is "the latest danger sport that combines the thrills of an extreme outdoor activity with the satisfaction of a well-pressed shirt."
Part of the attraction and interest the media has shown towards extreme ironing seems to center on the issue of whether it is really a sport or not. It is widely considered to be tongue-in-cheek.
Some other locations where such performances have taken place include a mountainside of a difficult climb; a forest; in a canoe; while skiing or snowboarding; on top of large bronze statues; in the middle of a street; underwater; in the middle of the M1 motorway; race; whilst parachuting; and under the ice sheet of a frozen lake. The performances have been conducted solo or by groups.
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- "Extreme Ironing" | 2021-08-31 | 411 Upvotes 172 Comments
๐ 1989 Tiananmen Square protests and massacre
The Tiananmen Square protests, also known as the June Fourth Incident (Chinese: ๅ ญๅไบไปถ; pinyin: liรนsรฌ shรฌjiร n) in China, were student-led demonstrations held in Tiananmen Square, Beijing during 1989. In what is known as the Tiananmen Square Massacre (Chinese: ๅคฉๅฎ้จๅคงๅฑ ๆ; pinyin: Tiฤn'ฤnmรฉn dร tรบshฤ), troops armed with assault rifles and accompanied by tanks fired at the demonstrators and those trying to block the military's advance into Tiananmen Square. The protests started on 15 April and were forcibly suppressed on 4 June when the government declared martial law and sent the People's Liberation Army to occupy parts of central Beijing. Estimates of the death toll vary from several hundred to several thousand, with thousands more wounded. The popular national movement inspired by the Beijing protests is sometimes called the '89 Democracy Movement (Chinese: ๅ ซไนๆฐ่ฟ; pinyin: Bฤjiว mรญnyรนn) or the Tiananmen Square Incident (Chinese: ๅคฉๅฎ้จไบไปถ; pinyin: Tiฤn'ฤnmรฉn shรฌjiร n).
The protests were precipitated by the death of pro-reform Chinese Communist Party (CCP) general secretary Hu Yaobang in April 1989 amid the backdrop of rapid economic development and social change in post-Mao China, reflecting anxieties among the people and political elite about the country's future. The reforms of the 1980s had led to a nascent market economy that benefited some people but seriously disadvantaged others, and the one-party political system also faced a challenge to its legitimacy. Common grievances at the time included inflation, corruption, limited preparedness of graduates for the new economy, and restrictions on political participation. Although they were highly disorganized and their goals varied, the students called for greater accountability, constitutional due process, democracy, freedom of the press, and freedom of speech. At the height of the protests, about oneย million people assembled in the Square.
As the protests developed, the authorities responded with both conciliatory and hardline tactics, exposing deep divisions within the party leadership. By May, a student-led hunger strike galvanized support around the country for the demonstrators, and the protests spread to some 400 cities. Among the CCP's top leadership, Premier Li Peng and Party Elders Li Xiannian and Wang Zhen called for decisive action through violent suppression of the protesters, and ultimately managed to win over Paramount Leader Deng Xiaoping and President Yang Shangkun to their side. On 20 May, the State Council declared martial law. They mobilized as many as ~300,000 troops to Beijing. The troops advanced into central parts of Beijing on the city's major thoroughfares in the early morning hours of 4 June, killing both demonstrators and bystanders in the process. The military operations were under the overall command of General Yang Baibing, half-brother of President Yang Shangkun.
The international community, human rights organizations, and political analysts condemned the Chinese government for the massacre. Western countries imposed arms embargoes on China. The Chinese government made widespread arrests of protesters and their supporters, suppressed other protests around China, expelled foreign journalists, strictly controlled coverage of the events in the domestic press, strengthened the police and internal security forces, and demoted or purged officials it deemed sympathetic to the protests. More broadly, the suppression ended the political reforms begun in 1986 and halted the policies of liberalization of the 1980s, which were only partly resumed after Deng Xiaoping's Southern Tour in 1992. Considered a watershed event, reaction to the protests set limits on political expression in China that have lasted up to the present day. Remembering the protests is widely associated with questioning the legitimacy of CCP rule and remains one of the most sensitive and most widely censored topics in China.
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- "1989 Tiananmen Square protests and massacre" | 2024-06-02 | 22 Upvotes 3 Comments
- "Tiananmen Square: Protests and Massacre (1989)" | 2022-11-27 | 39 Upvotes 4 Comments
- "1989 Tiananmen Square Protests and Massacre" | 2022-06-04 | 52 Upvotes 8 Comments