Have a deep view into what people are curious about.

🔗 Internet culture 🔗 Microsoft

The Ballmer Peak is a humorous concept invented by Randall Munroe in the xkcd webcomic, joking that a programmer who is appropriately intoxicated (between 0.129-0.138% BAC) will achieve a high level of programming productivity; the peak occurs at 0.1337%, a reference to leet. The concept is loosely tied to former Microsoft CEO, Steve Ballmer, and is likely a play on Balmer series of hydrogen spectral lines named for the scientist Johann Balmer.

A San Francisco organization, Originate, has organized a "Ballmer Peak-A-Thon", an open bar event where people were given "5 hours to find the elusive Ballmer peak, and build the best worst business possible."

There is no scientific basis for the Ballmer Peak, though researchers have studied adjacent topics, such as the impact of inebriation on problem solving. One study identified worse programming performance with increasing blood alcohol content, but joked in a footnote that as "the prescribed BAC in this experiment did not reach the Ballmer Peak", they did not technically refute the concept. In addition, the Ballmer Peak has been the subject of satirical academic studies, including a 2024 paper presented at SIGBOVIK, a satirical computer science conference organized by Carnegie Mellon students, which caught broader attention in the programming community. That study, which tested blood alcohol levels of only one male subject tackling competitive computer programming questions, found no evidence of a sudden "peak" of programming ability but did generally find that speed of solving the challenges increased with some alcohol consumption before a rapid decline.

By the time of Ballmer's 2013 announcement of his retirement from Microsoft, the concept of the "Ballmer Peak" was entrenched enough that media joked that the actual Ballmer Peak was the resulting jump in stock price.

🔗 Sweden

The Old Stockholm telephone tower (Swedish: Telefontornet) was a metallic structure built to connect approximately 5,500 telephone lines in the Swedish capital of Stockholm. Constructed in 1887, the tower was used until 1913. It was damaged by a fire in 1952 and demolished the following year.

🔗 Physics

A nanoscale vacuum-channel transistor (NVCT) is a theoretically visioned transistor in which the electron transport medium is a vacuum. In a traditional solid-state transistor, a semiconductor channel exists between the source and the drain, and the current flows through the semiconductor. However, in a nanoscale vacuum-channel transistor, no material exists between the source and the drain, and therefore, the current flows through the vacuum. However, experimental realization of such a transistor has not been demonstrated.

Theoretically, a vacuum-channel transistor is expected to operate faster than a traditional solid-state transistor, and have higher power output. Moreover, vacuum-channel transistors are expected to operate at higher temperature and radiation level than a traditional transistor making them suitable for space application.

The development of vacuum-channel transistors is still at a very early research stage, and there are only limited study in recent literature such as vertical field-emitter vacuum-channel transistor, gate-insulated planar electrodes vacuum-channel transistor, vertical vacuum-channel transistor, and all-around gate vacuum-channel transistor.

🔗 United States 🔗 Spaceflight 🔗 Telecommunications

The Iridium satellite constellation provides L-band voice and data information coverage to satellite phones, pagers and integrated transceivers over the entire Earth surface. Iridium Communications owns and operates the constellation, additionally selling equipment and access to its services. It was originally conceived by Bary Bertiger, Raymond J. Leopold and Ken Peterson in late 1987 (in 1988 protected by patents Motorola filed in their names) and then developed by Motorola on a fixed-price contract from July 29, 1993, to November 1, 1998, when the system became operational and commercially available.

The constellation consists of 66 active satellites in orbit, required for global coverage, and additional spare satellites to serve in case of failure. Satellites are in low Earth orbit at a height of approximately 781 km (485 mi) and inclination of 86.4°. Orbital velocity of the satellites is approximately 27,000 km/h (17,000 mph). Satellites communicate with neighboring satellites via K_a band inter-satellite links. Each satellite can have four inter-satellite links: one each to neighbors fore and aft in the same orbital plane, and one each to satellites in neighboring planes to either side. The satellites orbit from pole to same pole with an orbital period of roughly 100 minutes. This design means that there is excellent satellite visibility and service coverage especially at the North and South poles. The over-the-pole orbital design produces "seams" where satellites in counter-rotating planes next to one another are traveling in opposite directions. Cross-seam inter-satellite link hand-offs would have to happen very rapidly and cope with large Doppler shifts; therefore, Iridium supports inter-satellite links only between satellites orbiting in the same direction. The constellation of 66 active satellites has six orbital planes spaced 30° apart, with 11 satellites in each plane (not counting spares). The original concept was to have 77 satellites, which is where the name Iridium came from, being the element with the atomic number 77 and the satellites evoking the Bohr model image of electrons orbiting around the Earth as its nucleus. This reduced set of six planes is sufficient to cover the entire Earth surface at every moment.

Because of the shape of the original Iridium satellites' reflective antennas, the first generation satellites focus sunlight on a small area of the Earth surface in an incidental manner. This results in an effect called Iridium flares, where the satellite momentarily appears as one of the brightest objects in the night sky and can be seen even during daylight. Newer Iridium satellites do not produce flares.

🔗 Canada 🔗 Finance & Investment 🔗 Marketing & Advertising 🔗 Numismatics 🔗 Automobiles 🔗 Retailing

Canadian Tire money, officially Canadian Tire 'money' or CTM, is a loyalty program operated by the Canadian retail chain Canadian Tire Corporation (CTC). It consists of both paper coupons introduced in 1958 and used in Canadian Tire stores as scrip, and since 2012 in a digital form introduced as Canadian Tire Money Advantage, rebranded in 2018 as Triangle Rewards. Both forms of the loyalty program remain current as of December 2022. Canadian Tire Money has been noted as the most successful loyalty program in Canadian retail history.

Canadian Tire Money is denominated in Canadian dollars. It is earned based on the pre-tax amount of a purchase, excluding labour and shop supplies costs. The initial rate earned was 5% of the eligible purchase price, but it was lowered to 3%, then to 1.4% and now is 0.4%.

When used to pay for merchandise, CTM is considered to be a cash equivalent and may be used to pay for any part of a purchase, including sales taxes. CTM cannot be exchanged for real Canadian currency.

🔗 New York City 🔗 Architecture

75½ Bedford Street is a house located in the West Village neighborhood of New York City that is only 9 feet 6 inches (2.9 meters) wide. Built in 1873, it is often described as the narrowest house in New York. Its past tenants have included Edna St. Vincent Millay, Ann McGovern, cartoonist William Steig and anthropologist Margaret Mead. It is sometimes referred to as the Millay House, indicated by a plaque on the outside of the house. The house is located in the Greenwich Village Historic District, but is not an individually designated New York City Landmark.

🔗 Biography 🔗 Physics 🔗 Biography/science and academia 🔗 Physics/Biographies 🔗 Sicily

Ettore Majorana (, Italian: [ˈɛttore majoˈraːna]; born on 5 August 1906 – likely dying in or after 1959) was an Italian theoretical physicist who worked on neutrino masses. On 25 March 1938, he disappeared under mysterious circumstances after purchasing a ticket to travel by ship from Naples to Palermo.

The Majorana equation and Majorana fermions are named after him. In 2006, the Majorana Prize was established in his memory.

🔗 Computing 🔗 Computing/Computer hardware

PLATO (Programmed Logic for Automatic Teaching Operations) was the first generalized computer-assisted instruction system. Starting in 1960, it ran on the University of Illinois' ILLIAC I computer. By the late 1970s, it supported several thousand graphics terminals distributed worldwide, running on nearly a dozen different networked mainframe computers. Many modern concepts in multi-user computing were originally developed on PLATO, including forums, message boards, online testing, e-mail, chat rooms, picture languages, instant messaging, remote screen sharing, and multiplayer video games.

PLATO was designed and built by the University of Illinois and functioned for four decades, offering coursework (elementary through university) to UIUC students, local schools, and other universities. Courses were taught in a range of subjects, including Latin, chemistry, education, music, and primary mathematics. The system included a number of features useful for pedagogy, including text overlaying graphics, contextual assessment of free-text answers, depending on the inclusion of keywords, and feedback designed to respond to alternative answers.

Rights to market PLATO as a commercial product were licensed by Control Data Corporation (CDC), the manufacturer on whose mainframe computers the PLATO IV system was built. CDC President William Norris planned to make PLATO a force in the computer world, but found that marketing the system was not as easy as hoped. PLATO nevertheless built a strong following in certain markets, and the last production PLATO system did not shut down until 2006, coincidentally just a month after Norris died.

🔗 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.

🔗 Alternative education

A Sudbury school is a type of school, usually for the K-12 age range, where students have complete responsibility for their own education, and the school is run by a direct democracy in which students and staff are equal citizens. Students use their time however they wish, and learn as a by-product of ordinary experience rather than through coursework. There is no predetermined educational syllabus, prescriptive curriculum or standardized instruction. This is a form of democratic education. Daniel Greenberg, one of the founders of the original Sudbury Model school, writes that the two things that distinguish a Sudbury Model school are that everyone - adults and children - are treated equally and that there is no authority other than that granted by the consent of the governed.

While each Sudbury Model school operates independently and determines their own policies and procedures, they share a common culture. The intended culture within a Sudbury school has been described with such words as freedom, trust, respect, responsibility and democracy.

The name 'Sudbury' originates from the Sudbury Valley School, founded in 1968 in Framingham, Massachusetts, near Sudbury, Massachusetts. Though there is no formal or regulated definition of a Sudbury Model school, there are now more than 60 schools that identify themselves with Sudbury around the world. Some, though not all, include "Sudbury" in their name. These schools operate as independent entities and are not formally associated in any way.