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๐ Ready Player One โ what Oculus + FB will look like?
Ready Player One is a 2011 science fiction novel, and the debut novel of American author Ernest Cline. The story, set in a dystopia in 2045, follows protagonist Wade Watts on his search for an Easter egg in a worldwide virtual reality game, the discovery of which would lead him to inherit the game creator's fortune. Cline sold the rights to publish the novel in June 2010, in a bidding war to the Crown Publishing Group (a division of Random House). The book was published on August 16, 2011. An audiobook was released the same day; it was narrated by Wil Wheaton, who was mentioned briefly in one of the chapters.Ch. 20 In 2012, the book received an Alex Award from the Young Adult Library Services Association division of the American Library Association and won the 2012 Prometheus Award. A film adaptation, screenwritten by Cline and Zak Penn and directed by Steven Spielberg, was released on March 29, 2018.
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- "Ready Player One โ what Oculus + FB will look like? " | 2014-03-26 | 31 Upvotes 16 Comments
๐ Hacker Koan
The Jargon File is a glossary and usage dictionary of slang used by computer programmers. The original Jargon File was a collection of terms from technical cultures such as the MIT AI Lab, the Stanford AI Lab (SAIL) and others of the old ARPANET AI/LISP/PDP-10 communities, including Bolt, Beranek and Newman, Carnegie Mellon University, and Worcester Polytechnic Institute. It was published in paperback form in 1983 as The Hacker's Dictionary (edited by Guy Steele), revised in 1991 as The New Hacker's Dictionary (ed. Eric S. Raymond; third edition published 1996).
The concept of the file began with the Tech Model Railroad Club (TMRC) that came out of early PDP-1 and TX-0 hackers in the 1950s, where the term hacker emerged and the ethic, philosophies and some of the nomenclature emerged.
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- "Hacker Koan" | 2014-03-23 | 15 Upvotes 15 Comments
- "Hacker Koan" | 2010-07-31 | 50 Upvotes 7 Comments
๐ Type A and Type B personality theory
Type A and Type B personality hypothesis describes two contrasting personality types. In this hypothesis, personalities that are more competitive, highly organized, ambitious, impatient, highly aware of time management and/or aggressive are labeled Type A, while more relaxed, less 'neurotic', 'frantic', 'explainable', personalities are labeled Type B.
The two cardiologists who developed this theory came to believe that Type A personalities had a greater chance of developing coronary heart disease. Following the results of further studies and considerable controversy about the role of the tobacco industry funding of early research in this area, some reject, either partially or completely, the link between Type A personality and coronary disease. Nevertheless, this research had a significant effect on the development of the health psychology field, in which psychologists look at how an individual's mental state affects physical health.
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- "Type A and Type B personality theory" | 2014-03-22 | 26 Upvotes 3 Comments
๐ Ballistic Recovery Systems
Ballistic Recovery Systems, Inc. (commonly referred to as BRS Aerospace, or simply BRS) is a manufacturer of aircraft ballistic parachutes.
The company was formed in 1980 by Boris Popov of Saint Paul, Minnesota, after he survived a 400-foot (120ย m) fall in a partially collapsed hang glider in 1975. As a result, Popov invented a parachute system that could lower an entire light aircraft to the ground in the event of loss of control, failure of the aircraft structure, or other in-flight emergencies.
Popov was granted a U.S. patent on 26 August 1986 for the so-called Ballistic Recovery System (BRS) - patent US 4607814 A.
The company has two divisions: BRS Aviation and BRS Defense.
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- "Ballistic Recovery Systems" | 2014-03-21 | 43 Upvotes 30 Comments
๐ Indian Ocean garbage patch
The Indian Ocean garbage patch, discovered in 2010, is a gyre of marine litter suspended in the upper water column of the central Indian Ocean, specifically the Indian Ocean Gyre, one of the five major oceanic gyres. The patch does not appear as a continuous debris field. As with other patches in each of the five oceanic gyres, the plastics in it break down to ever smaller particles, and to constituent polymers. As with the other patches, the field constitutes an elevated level of pelagic plastics, chemical sludge, and other debris; primarily particles that are invisible to the naked eye. The concentration of particle debris has been estimated to be approximately 10,000 particles per square kilometer.
A similar patch of floating plastic debris in the Pacific Ocean, the Great Pacific garbage patch, was predicted in 1985, and discovered in 1997 by Charles J. Moore as he passed through the North Pacific Gyre on his return from the Transpacific Yacht Race. The North Atlantic garbage patch was discovered in 2010.
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- "Indian Ocean garbage patch" | 2014-03-20 | 92 Upvotes 45 Comments
๐ Namecoin
Namecoin (Symbol: โ or NMC) is a cryptocurrency originally forked from bitcoin software. It is based on the code of bitcoin and uses the same proof-of-work algorithm. Like bitcoin, it is limited to 21 million coins.
Namecoin can store data within its own blockchain transaction database. The original proposal for Namecoin called for Namecoin to insert data into bitcoin's blockchain directly. Anticipating scaling difficulties with this approach, a shared proof-of-work (POW) system was proposed to secure new cryptocurrencies with different use cases.
Namecoin's flagship use case is the censorship-resistant top level domain .bit
, which is functionally similar to .com
or .net
domains but is independent of ICANN, the main governing body for domain names.
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- "Namecoin" | 2014-03-16 | 150 Upvotes 51 Comments
๐ Project Cybersyn (1971)
Project Cybersyn was a Chilean project from 1971โ1973 during the presidency of Salvador Allende aimed at constructing a distributed decision support system to aid in the management of the national economy. The project consisted of four modules: an economic simulator, custom software to check factory performance, an operations room, and a national network of telex machines that were linked to one mainframe computer.
Project Cybersyn was based on viable system model theory approach to organizational design, and featured innovative technology for its time: it included a network of telex machines (Cybernet) in state-run enterprises that would transmit and receive information with the government in Santiago. Information from the field would be fed into statistical modeling software (Cyberstride) that would monitor production indicators, such as raw material supplies or high rates of worker absenteeism, in "almost" real time, alerting the workers in the first case and, in abnormal situations, if those parameters fell outside acceptable ranges by a very large degree, also the central government. The information would also be input into economic simulation software (CHECO, for CHilean ECOnomic simulator) that the government could use to forecast the possible outcome of economic decisions. Finally, a sophisticated operations room (Opsroom) would provide a space where managers could see relevant economic data, formulate feasible responses to emergencies, and transmit advice and directives to enterprises and factories in alarm situations by using the telex network.
The principal architect of the system was British operations research scientist Stafford Beer, and the system embodied his notions of organisational cybernetics in industrial management. One of its main objectives was to devolve decision-making power within industrial enterprises to their workforce in order to develop self-regulation of factories.
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- "Project Cybersyn" | 2020-10-13 | 212 Upvotes 114 Comments
- "Project Cybersyn (1971)" | 2014-03-14 | 70 Upvotes 36 Comments
- "Computer-controlled socialist economy gets destroyed on 9/11... 1973" | 2011-09-29 | 12 Upvotes 8 Comments
- "Project Cybersyn" | 2010-08-27 | 12 Upvotes 3 Comments
- "Project Cybersyn: real-time computer control of a planned economy (1970-1973)" | 2010-03-14 | 56 Upvotes 33 Comments
๐ List of aerial disappearances
This list of missing aircraft includes all of the aircraft that have disappeared in flight for reasons that have never been definitely determined. According to Annex 13 of the International Civil Aviation Organization, an aircraft is considered to be missing "when the official search has been terminated and the wreckage has not been located". However, there still remains a "grey area" on how much wreckage needs to be found for a plane to be declared "recovered". This list does not include every aviator, or air passenger that has ever gone missing as these are separate categories.
In the tables below, each missing aircraft is defined (in the Aircraft column) using one or more identifying features. If the aircraft was known by a custom or personalized name (e.g. Pathfinder), that name is presented first (in italics) followed by the aircraft type (in parentheses). The make of aircraft, although not necessarily a unique identifier, is also provided where appropriate. Aircraft registrations began to be used in the early 20th century for individual identification, so this is also included in the later tables (in parentheses).
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- "List of aerial disappearances" | 2014-03-11 | 12 Upvotes 7 Comments
๐ Khalid El-Masri
Khaled El-Masri (also Khalid El-Masri and Khaled Masri, Levantine Arabic pronunciation: [หxaหlษชd elหmษsหคษพi, -หmษsหคษพe], Arabic: ุฎุงูุฏ ุงูู ุตุฑูโ) (born 29 June 1963) is a German and Lebanese citizen who was mistakenly abducted by the Macedonian police in 2003, and handed over to the U.S. Central Intelligence Agency (CIA). While in CIA custody, he was flown to Afghanistan, where he was held at a black site and routinely interrogated, beaten, strip-searched, sodomized, and subjected to other cruel forms of inhumane and degrading treatment and torture. After El-Masri held hunger strikes, and was detained for four months in the "Salt Pit", the CIA finally admitted his arrest and torture were a mistake and released him. He is believed to be among an estimated 3,000 detainees whom the CIA abducted from 2001โ2005.
In May 2004, the U.S. Ambassador to Germany, Daniel R. Coats, convinced the German interior minister, Otto Schily, not to press charges or to reveal the program. El-Masri filed suit against the CIA for his arrest, extraordinary rendition and torture. In 2006, his suit El Masri v. Tenet, in which he was represented by the American Civil Liberties Union (ACLU), was dismissed by the United States District Court for the Eastern District of Virginia, based on the U.S. government's claiming the state secrets privilege. The ACLU said the Bush administration attempted to shield its abuses by invoking this privilege. The case was also dismissed by the Appeals Court for the Fourth Circuit, and in December 2007, the United States Supreme Court declined to hear the case.
On 13 December 2012, El-Masri won an Article 34 case at the European Court of Human Rights in Strasbourg. The court determined he had been tortured while held by CIA agents and ruled that Macedonia was responsible for abusing him while in the country, and knowingly transferring him to the CIA when torture was a possibility. It awarded him compensation. This marked the first time that CIA activities against detainees was legally declared as torture. The European Court condemned nations for collaborating with the United States in these secret programs.
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- "Khalid El-Masri" | 2014-03-11 | 19 Upvotes 3 Comments
๐ Two Generals' Problem
In computing, the Two Generals' Problem is a thought experiment meant to illustrate the pitfalls and design challenges of attempting to coordinate an action by communicating over an unreliable link. In the experiment, two generals are only able to communicate with one another by sending a messenger through enemy territory. The experiment asks how they might reach an agreement on the time to launch an attack, while knowing that any messenger they send could be captured.
It is related to the more general Byzantine Generals Problem and appears often in introductory classes about computer networking (particularly with regard to the Transmission Control Protocol, where it shows that TCP can't guarantee state consistency between endpoints and why this is the case), though it applies to any type of two-party communication where failures of communication are possible. A key concept in epistemic logic, this problem highlights the importance of common knowledge. Some authors also refer to this as the Two Generals' Paradox, the Two Armies Problem, or the Coordinated Attack Problem. The Two Generals' Problem was the first computer communication problem to be proved to be unsolvable. An important consequence of this proof is that generalizations like the Byzantine Generals problem are also unsolvable in the face of arbitrary communication failures, thus providing a base of realistic expectations for any distributed consistency protocols.
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- "Two Generals' Problem" | 2014-03-09 | 97 Upvotes 28 Comments
- "The Two Generals' Problem (wikipedia)" | 2010-06-25 | 34 Upvotes 19 Comments