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🔗 Electronics

A plugtest or plugfest is an event based on a certain technical standard where the designers of electronic equipment or software test the interoperability of their products or designs with those of other manufacturers. It could be literally plugging company A's cable into company B's socket, or a more elaborate test resembling a realistic scenario.

The technical goal is twofold: check compliance with the standard, and test the effectiveness of the standard. The latter could be the case when the standard is ambiguous. A simplified example is: the width of a plug is prescribed, but vendors use different lengths.

Plugtests can be formal and have public test scores or informal and private. Besides helping vendors improve their interoperability, plugtests help create awareness about the standard and can improve transparency on compliance.

🔗 United States 🔗 Internet 🔗 Law 🔗 Freedom of speech 🔗 Law Enforcement 🔗 United States/FBI

A warrant canary is a method by which a communications service provider aims to inform its users that the provider has been served with a government subpoena despite legal prohibitions on revealing the existence of the subpoena. The warrant canary typically informs users that there has not been a court-issued subpoena as of a particular date. If the canary is not updated for the period specified by the host or if the warning is removed, users are to assume that the host has been served with such a subpoena. The intention is to allow the provider to warn users of the existence of a subpoena passively, without technically violating the court order not to do so.

Some subpoenas, such as those covered under 18 U.S.C. §2709(c) of the USA Patriot Act, provide criminal penalties for disclosing the existence of the subpoena to any third party, including the service provider's users.

National Security Letters (NSL) originated in the 1986 Electronic Communications Privacy Act and originally targeted those suspected of being agents of a foreign power. Targeting agents of a foreign power was revised in 2001 under the Patriot Act to allow NSLs to target those who may have information deemed relevant to both counterintelligence activities directed against the United States and terrorism. The idea of using negative pronouncements to thwart the nondisclosure requirements of court orders and served secret warrants was first proposed by Steven Schear on the cypherpunks mailing list, mainly to uncover targeted individuals at ISPs. It was also suggested for and used by public libraries in 2002 in response to the USA Patriot Act, which could have forced librarians to disclose the circulation history of library patrons.

🔗 Computing 🔗 Computing/Software

Rule of three ("Three strikes and you refactor") is a code refactoring rule of thumb to decide when similar pieces of code should be refactored to avoid duplication. It states that two instances of similar code don't require refactoring, but when similar code is used three times, it should be extracted into a new procedure. The rule was popularised by Martin Fowler in Refactoring and attributed to Don Roberts.

Duplication is considered a bad practice in programming because it makes the code harder to maintain. When the rule encoded in a replicated piece of code changes, whoever maintains the code will have to change it in all places correctly.

However, choosing an appropriate design to avoid duplication might benefit from more examples to see patterns in. Attempting premature refactoring risks selecting a wrong abstraction, which can result in worse code as new requirements emerge and will eventually need to be refactored again.

The rule implies that the cost of maintenance certainly outweighs the cost of refactoring and potential bad design when there are three copies, and may or may not if there are only two copies.

🔗 Law Enforcement 🔗 Crime and Criminal Biography

Nihilistic violent extremism (NVE), or nihilistic extremism, is a term used by law enforcement agencies to refer to extremism and violence lacking an ideological motivation, instead motivated by a misanthropic worldview and generalized hatred for society. It is closely associated with groups such as 764 and No Lives Matter. Despite nihilistic violent extremism's characterization as being unmotivated by genuine ideology, groups or individuals falling under this umbrella may adopt the aesthetics or tactics of, or have sympathies for, other extremist ideologies like neo-Nazism, the variant of Satanism associated with the Order of Nine Angles, and accelerationism. It is also closely associated with sexual misconduct, such as solicitation, production, or possession of child pornography, and sextortion, as well as general violence.

🔗 United States/U.S. Government 🔗 United States 🔗 Politics 🔗 Politics/American politics 🔗 Conservatism 🔗 Elections and Referendums 🔗 United States/U.S. presidential elections 🔗 United States/U.S. history 🔗 United States/Presidents of the United States

The Trump fake electors plot was an attempt by U.S. president Donald Trump and associates to have him remain in power after losing the 2020 United States presidential election. After the results of the election determined Trump had lost, he, his associates, and Republican Party officials in seven battleground states – Arizona, Georgia, Michigan, Nevada, New Mexico, Pennsylvania, and Wisconsin – devised a scheme to submit fraudulent certificates of ascertainment to falsely claim Trump had won the Electoral College vote in crucial states. The plot was one of Trump and his associates' attempts to overturn the 2020 United States presidential election.

The intent of the scheme was to pass the illegitimate certificates to then-Vice President Mike Pence in the hope he would count the fake electoral college ballots, rather than the authentic certificates, and thus overturn Joe Biden's victory. This scheme was defended by a fringe legal theory developed by Trump attorneys Kenneth Chesebro and John Eastman, detailed in the Eastman memos, which claimed a vice president has the constitutional discretion to swap official electors with an alternate slate during the certification process, thus changing the outcome of the electoral college vote and the overall winner of the presidential race. The scheme came to be known as the Pence Card.

By June 2024, dozens of Republican state officials and Trump associates had been indicted in four states for their alleged involvement. The federal Smith special counsel investigation investigated Trump's role in the events. According to testimony, Trump was aware of the fake electors scheme, and knew that Eastman's plan for Pence to obstruct the certification of electoral votes was a violation of the Electoral Count Act.

Trump's personal attorney, Rudy Giuliani, a "central figure" in the plot, coordinated the scheme across the seven states. In a conference call on January 2, 2021, Trump, Eastman, and Giuliani spoke to some 300 Republican state legislators in an effort to persuade them to convene special legislative sessions to replace legitimate Biden electors with fake Trump electors based on unfounded allegations of election fraud. Trump pressured the Justice Department to falsely announce it had found election fraud, and he attempted to install a new acting attorney general who had drafted a letter falsely asserting such election fraud had been found, in an attempt to persuade the Georgia legislature to convene and reconsider its Biden electoral votes.

Trump and Eastman asked Republican National Committee chair Ronna McDaniel to enlist the committee's assistance in gathering fake "contingent" electors. A senator's chief of staff tried to pass a list of fraudulent electors to Pence minutes before the vice president was to certify the election. The scheme was investigated by the January 6 committee and the Justice Department. The January 6 committee's final report identified lawyer Kenneth Chesebro as the plot's original architect. On October 20, 2023, Chesebro pleaded guilty in the state of Georgia to conspiring to file a false document and was sentenced to five years of probation.

🔗 Computing

PL/0 is a programming language, intended as an educational programming language, that is similar to but much simpler than Pascal, a general-purpose programming language. It serves as an example of how to construct a compiler. It was originally introduced in the book, Algorithms + Data Structures = Programs, by Niklaus Wirth in 1976. It features quite limited language constructs: there are no real numbers, very few basic arithmetic operations and no control-flow constructs other than "if" and "while" blocks. While these limitations make writing real applications in this language impractical, it helps the compiler remain compact and simple.

🔗 Spaceflight 🔗 Maps 🔗 Japan

The Quasi-Zenith Satellite System (QZSS) (Japanese: 準天頂衛星システム, Hepburn: juntenchō eisei shisutemu), also known as Michibiki (みちびき, "guidance"), is a regional navigation satellite system (RNSS) and a satellite-based augmentation system (SBAS) developed by the Japanese government to enhance the United States-operated Global Positioning System (GPS) in the Asia-Oceania regions, with a focus on Japan. The goal of QZSS is to provide highly precise and stable positioning services in the Asia-Oceania region, compatible with GPS. Four-satellite QZSS services were available on a trial basis as of 12 January 2018, and officially started on 1 November 2018. A satellite navigation system independent of GPS is planned for 2023 with seven satellites. In May 2023 it was announced that the system would expand to eleven satellites.

🔗 Technology 🔗 Disability

The optophone is a device, used by people who are blind, that scans text and generates time-varying chords of tones to identify letters. It is one of the earliest known applications of sonification. Dr. Edmund Fournier d'Albe of Birmingham University invented the optophone in 1913, which used selenium photosensors to detect black print and convert it into an audible output which could be interpreted by a blind person. The Glasgow company, Barr and Stroud, participated in improving the resolution and usability of the instrument.

Only a few units were built and reading was initially exceedingly slow; a demonstration at the 1918 Exhibition involved Mary Jameson reading at one word per minute. Later models of the Optophone allowed speeds of up to 60 words per minute, though only some subjects are able to achieve this rate.

🔗 Internet 🔗 Websites 🔗 Websites/Computing 🔗 Digital Preservation

The English Wikipedia has decided to stop using archive.today and its related websites. This decision was taken after a request for comment with more than 200 participants and is due to multiple concerns, including the site using editors' and readers' computers to run a denial-of-service attack and evidence that the website has tampered with some archived pages.

The addition of links to these websites is already being blocked by the edit filter, and it will likely be added to the spam blacklist in the future. Before that happens, we need everyone's help to replace or remove links to these websites. As of February 28, 2026, the citation templates in popular use on Wikipedia (WP:CS1 and WP:CS2) will not render Archive.today and affiliated archive URLs.

Note: Archive.org, or web.archive.org, run by the Internet Archive and the most-used web archive on Wikipedia, is uninvolved with and entirely separate from archive.today. Please keep using archive.org.

🔗 Ships

The Voith Schneider propeller (VSP), also known as a cycloidal drive is a specialized marine propulsion system (MPS). It is highly maneuverable, being able to change the direction of its thrust almost instantaneously. It is widely used on tugs and ferries.