Have a deep view into what people are curious about.

🔗 Politics 🔗 Psychology 🔗 Sociology

A collective action problem or social dilemma is a situation in which all individuals would be better off cooperating but fail to do so because of conflicting interests between individuals that discourage joint action. The collective action problem has been addressed in political philosophy for centuries, but was most clearly established in 1965 in Mancur Olson's The Logic of Collective Action.

Problems arise when too many group members choose to pursue individual profit and immediate satisfaction rather than behave in the group's best long-term interests. Social dilemmas can take many forms and are studied across disciplines such as psychology, economics, and political science. Examples of phenomena that can be explained using social dilemmas include resource depletion and low voter turnout. The collective action problem can be understood through the analysis of game theory and the free-rider problem, which results from the provision of public goods. Additionally, the collective problem can be applied to numerous public policy concerns that countries across the world currently face.

🔗 Mathematics

Sexy primes are prime numbers that differ from each other by 6. For example, the numbers 5 and 11 are both sexy primes, because 11 - 5 = 6.

The term "sexy prime" is a pun stemming from the Latin word for six: sex.

If p + 2 or p + 4 (where p is the lower prime) is also prime, then the sexy prime is part of a prime triplet.

🔗 Physics

In 2019, the SI base units were redefined in agreement with the International System of Quantities, effective on the 144th anniversary of the Metre Convention, 20 May 2019. In the redefinition, four of the seven SI base units – the kilogram, ampere, kelvin, and mole – were redefined by setting exact numerical values for the Planck constant (h), the elementary electric charge (e), the Boltzmann constant (k_B), and the Avogadro constant (N_A), respectively. The second, metre, and candela were already defined by physical constants and were subject to correction to their definitions. The new definitions aimed to improve the SI without changing the value of any units, ensuring continuity with existing measurements. In November 2018, the 26th General Conference on Weights and Measures (CGPM) unanimously approved these changes, which the International Committee for Weights and Measures (CIPM) had proposed earlier that year after determining that previously agreed conditions for the change had been met.^:23 These conditions were satisfied by a series of experiments that measured the constants to high accuracy relative to the old SI definitions, and were the culmination of decades of research.

The previous major change of the metric system occurred in 1960 when the International System of Units (SI) was formally published. At this time the metre was redefined: the definition was changed from the prototype of the metre to a certain number of wavelengths of a spectral line of a krypton-86 radiation, making it derivable from universal natural phenomena. The kilogram remained defined by a physical prototype, leaving it the only artefact upon which the SI unit definitions depend. At this time the SI, as a coherent system, was constructed around seven base units, powers of which were used to construct all other units. With the 2019 redefinition, the SI is constructed around seven defining constants, allowing all units to be constructed directly from these constants. The designation of base units is retained but is no longer essential to define SI measures.

The metric system was originally conceived as a system of measurement that was derivable from unchanging phenomena, but practical limitations necessitated the use of artefacts – the prototype of the metre and prototype of the kilogram – when the metric system was introduced in France in 1799. Although it was designed for long-term stability, the masses of the prototype kilogram and its secondary copies have shown small variations relative to each other over time; they are not thought to be adequate for the increasing accuracy demanded by science, prompting a search for a suitable replacement. The definitions of some units were defined by measurements that are difficult to precisely realise in a laboratory, such as the kelvin, which was defined in terms of the triple point of water. With the 2019 redefinition, the SI became wholly derivable from natural phenomena with most units being based on fundamental physical constants.

A number of authors have published criticisms of the revised definitions; their criticisms include the premise that the proposal failed to address the impact of breaking the link between the definition of the dalton and the definitions of the kilogram, the mole, and the Avogadro constant.

🔗 Aviation 🔗 Military history 🔗 Military history/Military aviation 🔗 Engineering 🔗 Industrial design

Speed tape is an aluminium pressure-sensitive tape used to perform minor repairs on aircraft and racing cars. It is used as a temporary repair material until a more permanent repair can be carried out. It has an appearance similar to duct tape, for which it is sometimes mistaken, but its adhesive is capable of sticking on an airplane fuselage or wing at high speeds, hence the name.

🔗 Computing

Jensen's Device is a computer programming technique that exploits call by name. It was devised by Danish computer scientist Jørn Jensen, who worked with Peter Naur at Regnecentralen. They worked on the GIER Algol compiler, one of the earliest correct implementations of ALGOL 60. ALGOL 60 used call by name.

🔗 Poetry 🔗 Songs

"Desiderata" (Latin: "things desired") is an early 1920s prose poem by the American writer Max Ehrmann. Although he copyrighted it in 1927, he distributed copies of it without a required copyright notice during 1933 and c. 1942, thereby forfeiting his US copyright. Largely unknown in the author's lifetime, its use in devotional and spoken word recordings in 1960 and 1971 called it to the attention of the world.

🔗 Sociology 🔗 Organizations 🔗 Media 🔗 Culture 🔗 Sociology/social movements 🔗 Toys

The Barbie Liberation Organization or BLO, sponsored by RTMark, were a group of artists and activists involved in culture jamming. They gained notoriety in 1993 after switching voice boxes in talking G.I. Joes and Barbie dolls. The BLO performed "surgery" on a reported 300–500 dolls from retail and returned them to shelves, an action they refer to as shopgiving. Thus, Teen Talk Barbie dolls would say phrases such as "Vengeance is mine", while G.I. Joe dolls would say phrases such as "The beach is the place for summer!"

🔗 United States/U.S. Government 🔗 United States 🔗 Biography

Khaled El-Masri (also Khalid El-Masri and Khaled Masri, Levantine Arabic pronunciation: [ˈxaːlɪd elˈmɑsˤɾi, -ˈmɑsˤɾe], Arabic: خالد المصري‎) (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 2001–2005.

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.

🔗 Law 🔗 England

In criminal law, Blackstone's ratio (also known as the Blackstone ratio or Blackstone's formulation) is the idea that:

It is better that ten guilty persons escape than that one innocent suffer.

As expressed by the English jurist William Blackstone in his seminal work, Commentaries on the Laws of England, published in the 1760s.

The idea subsequently became a staple of legal thinking in Anglo-Saxon jurisdictions and continues to be a topic of debate. There is also a long pre-history of similar sentiments going back centuries in a variety of legal traditions. The message that government and the courts must err on the side of innocence has remained constant.

🔗 Java

A Java processor is the implementation of the Java virtual machine (JVM) in hardware. In other words, the Java bytecode that makes up the instruction set of the abstract machine becomes the instruction set of a concrete machine. These were the most popular form of a high-level language computer architecture, and were "an attractive choice for building embedded and real-time systems that are programmed in Java". However, as of 2017, embedded Java is no longer common and no realtime Java chip vendors exist.