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🔗 Biography 🔗 Biography/science and academia 🔗 Israel

Abraham Lempel (Hebrew: אברהם למפל, 10 February 1936 – 4 February 2023) was an Israeli computer scientist and one of the fathers of the LZ family of lossless data compression algorithms.

🔗 United States 🔗 Medicine 🔗 Oregon 🔗 Crime 🔗 Religion 🔗 Biology 🔗 Terrorism

The 1984 Rajneeshee bioterror attack was the food poisoning of 751 individuals in The Dalles, Oregon, through the deliberate contamination of salad bars at ten local restaurants with Salmonella. A group of prominent followers of Bhagwan Shree Rajneesh (later known as Osho) led by Ma Anand Sheela had hoped to incapacitate the voting population of the city so that their own candidates would win the 1984 Wasco County elections. The incident was the first and is the single largest bioterrorist attack in United States history.

Having previously gained political control of Antelope, Oregon, Rajneesh's followers, who were based in nearby Rajneeshpuram, sought election to two of the three seats on the Wasco County Circuit Court that were up for election in November 1984. Fearing they would not gain enough votes, some Rajneeshpuram officials decided to incapacitate voters in The Dalles, the largest population center in Wasco County. The chosen biological agent was Salmonella enterica Typhimurium, which was first delivered through glasses of water to two County Commissioners and then, on a larger scale, at salad bars and in salad dressing.

As a result of the attack, 751 people contracted salmonellosis, 45 of whom were hospitalized, but none died. Although an initial investigation by the Oregon Public Health Division and the Centers for Disease Control did not rule out deliberate contamination, the agents and contamination were only confirmed a year later. On February 28, 1985, Congressman James H. Weaver gave a speech in the United States House of Representatives in which he "accused the Rajneeshees of sprinkling Salmonella culture on salad bar ingredients in eight restaurants".

At a press conference in September 1985, Rajneesh accused several of his followers of participation in this and other crimes, including an aborted plan in 1985 to assassinate a United States Attorney, and he asked state and federal authorities to investigate. Oregon Attorney General David B. Frohnmayer set up an interagency task force, composed of Oregon State Police and the Federal Bureau of Investigation, and executed search warrants in Rajneeshpuram. A sample of bacteria matching the contaminant that had sickened the town residents was found in a Rajneeshpuram medical laboratory. Two leading Rajneeshpuram officials were convicted on charges of attempted murder and served 29 months of 20-year sentences in a minimum-security federal prison.

🔗 Film 🔗 Film/Filmmaking 🔗 Photography 🔗 Photography/History of photography

The Zone System is a photographic technique for determining optimal film exposure and development, formulated by Ansel Adams and Fred Archer. Adams described the Zone System as "[...] not an invention of mine; it is a codification of the principles of sensitometry, worked out by Fred Archer and myself at the Art Center School in Los Angeles, around 1939–40."

The technique is based on the late 19th century sensitometry studies of Hurter and Driffield. The Zone System provides photographers with a systematic method of precisely defining the relationship between the way they visualize the photographic subject and the final results. Although it originated with black-and-white sheet film, the Zone System is also applicable to roll film, both black-and-white and color, negative and reversal, and to digital photography.

🔗 Internet 🔗 Websites 🔗 Websites/Computing

A captive portal is a web page accessed with a web browser that is displayed to newly connected users of a Wi-Fi or wired network before they are granted broader access to network resources. Captive portals are commonly used to present a landing or log-in page which may require authentication, payment, acceptance of an end-user license agreement/acceptable use policy, or survey completion. Captive portals are used for a broad range of mobile and pedestrian broadband services – including cable and both commercially provided Wi-Fi and home hotspots. A captive portal can also be used to provide access to enterprise or residential wired networks, such as apartment houses, hotel rooms, and business centers.

The captive portal is presented to the client and is stored either at the gateway or on a web server hosting the web page. Depending on the feature set of the gateway, websites or TCP ports can be allow-listed so that the user would not have to interact with the captive portal in order to use them. The MAC address of attached clients can also be used to bypass the login process for specified devices.

WISPr refers to this web-browser–based authentication method as the Universal Access Method (UAM).

🔗 Medicine 🔗 Conservatism

Ronald Reagan Speaks Out Against Socialized Medicine is a 1961 LP featuring the actor Ronald Reagan. In this more than ten-minute recording, Reagan "criticized Social Security for supplanting private savings and warned that subsidized medicine would curtail Americans' freedom" and that "pretty soon your son won't decide when he's in school, where he will go or what he will do for a living. He will wait for the government to tell him." Roger Lowenstein called the LP part of a "stealth program" conducted by the American Medical Association (see Operation Coffee Cup).

🔗 Department of Fun

Of the over six million articles in the English Wikipedia there are some articles that Wikipedians have identified as being somewhat unusual. These articles are verifiable, valuable contributions to the encyclopedia, but are a bit odd, whimsical, or something one would not expect to find in Encyclopædia Britannica. We should take special care to meet the highest standards of an encyclopedia with these articles lest they make Wikipedia appear idiosyncratic. If you wish to add an article to this list, the article in question should preferably meet one or more of these criteria:

• The article is something a reasonable person would not expect to find in a standard encyclopedia.
• The subject is a highly unusual combination of concepts, such as cosmic latte, death from laughter, etc.
• The subject is a clear anomaly—something that defies common sense, common expectations or common knowledge, such as Bir Tawil, Märket, Phineas Gage, Snow in Florida, etc.
• The subject is well-documented for unexpected notoriety or an unplanned cult following at extreme levels, such as Ampelmännchen or All your base are belong to us.
• The subject is a notorious hoax, such as the Sokal affair or Mary Toft.
• The subject might be found amusing, though serious.
• The subject is distinct amongst other similar ones.
• The article is a list or collection of articles or subjects meeting the criteria above.

This definition is not precise or absolute; some articles could still be considered unusual even if they do not fit these guidelines.

To keep the list of interest to readers, each entry on this list should be an article on its own (not merely a section in a less unusual article) and of decent quality, and in large meeting Wikipedia's manual of style. For unusual contributions that are of greater levity, see Wikipedia:Silly Things. A star () indicates a featured article. A plus () indicates a good article.

🔗 Death 🔗 China 🔗 Socialism

The Guangxi Massacre (simplified Chinese: 广西大屠杀; traditional Chinese: 廣西大屠殺; pinyin: Guǎngxī Dàtúshā), or Guangxi Cultural Revolution Massacre (广西文革大屠杀; 廣西文革大屠殺; Guǎngxī Wéngé Dàtúshā), was a series of events involving lynching and direct massacre in Guangxi during the Cultural Revolution (1966-1976). The official record shows an estimated death toll from 100,000 to 150,000. Methods of slaughter included beheading, beating, live burial, stoning, drowning, boiling, disemboweling, and more. In certain areas including Wuxuan County and Wuming District, massive human cannibalism occurred even though no famine existed; according to public records available, at least 137 people—perhaps hundreds more—were eaten by others and at least thousands of people participated in the cannibalism. Other researchers have pointed out that in a county alone, 421 people had been eaten, and there were reports of cannibalism across dozens of counties in Guangxi.

After the Cultural Revolution, people who were involved in the massacre or cannibalism received only minor punishments during the "Boluan Fanzheng" period; in Wuxuan County where at least 38 people were eaten, fourteen participants were prosecuted, receiving up to 14 years in prison, while ninety-one members of the Communist Party of China (CPC) were expelled from the party and thirty-nine non-party officials were either demoted or had a salary cut. Although the cannibalism was sponsored by local offices of Communist Party and militia, no direct evidence suggests that anyone in the national Communist Party leadership including Mao Zedong endorsed the cannibalism or even knew of it.

🔗 Aviation 🔗 Marketing & Advertising 🔗 United Kingdom 🔗 Guild of Copy Editors 🔗 Retailing 🔗 Home Living

The Hoover free flights promotion was a marketing promotion run by the British division of the Hoover Company in late 1992. The promotion, aiming to boost sales during the global recession of the early 1990s, offered two complimentary round-trip plane tickets to the United States, worth about £600, to any customer purchasing at least £100 in Hoover products. Hoover had been experiencing dwindling sales as a result of the economic downturn and a sharp increase in competing brands. Hoover was counting on most customers spending more than £100, as well as being deterred from completing the difficult application process, and not meeting its exact terms.

Consumer response was much higher than the company anticipated, with many customers buying the minimum £100 of Hoover products to qualify. It was perceived as two US flights for just £100 with a free vacuum cleaner included. The resulting demand was disastrous for the 84-year-old company. Hoover cancelled the ticket promotion after consumers had already bought the products and filled in forms applying for millions of pounds' worth of tickets. Reneging on the offer resulted in protests and legal action from customers who failed to receive the tickets they had been promised. The campaign was a financial disaster for the company and led to the loss of Hoover's Royal Warrant after the airing of a 2004 BBC documentary. The European branch of the company was eventually sold to one of its competitors, Candy, having never recovered from the losses, the promotion and the subsequent scandal.

🔗 Games 🔗 Circus

Siteswap is a numeric juggling notation used to describe or represent juggling patterns. It is also referred to as Quantum Juggling, or The Cambridge Notation. Siteswap may also be used to describe siteswap patterns, possible patterns transcribed using siteswap. Throws are represented by positive integers that specify the number of beats in the future when the object is thrown again: "The idea behind siteswap is to keep track of the order that balls are thrown and caught, and only that." It is an invaluable tool in determining which combinations of throws yield valid juggling patterns for a given number of objects, and has led to previously unknown patterns (such as 441). However, it does not describe body movements such as behind-the-back and under-the-leg. Siteswap assumes that, "throws happen on beats that are equally spaced in time."

For example, a three-ball cascade may be notated "3 ", while a shower may be notated "5 1".

🔗 Computing 🔗 Mathematics 🔗 Computing/Software 🔗 Computing/Computer science

The Karatsuba algorithm is a fast multiplication algorithm. It was discovered by Anatoly Karatsuba in 1960 and published in 1962. It reduces the multiplication of two n-digit numbers to at most ${\displaystyle n^{\log _{2}3}\approx n^{1.58}}$ single-digit multiplications in general (and exactly ${\displaystyle n^{\log _{2}3}}$ when n is a power of 2). It is therefore faster than the classical algorithm, which requires ${\displaystyle n^{2}}$ single-digit products. For example, the Karatsuba algorithm requires 3¹⁰ = 59,049 single-digit multiplications to multiply two 1024-digit numbers (n = 1024 = 2¹⁰), whereas the classical algorithm requires (2¹⁰)² = 1,048,576 (a speedup of 17.75 times).

The Karatsuba algorithm was the first multiplication algorithm asymptotically faster than the quadratic "grade school" algorithm. The Toom–Cook algorithm (1963) is a faster generalization of Karatsuba's method, and the Schönhage–Strassen algorithm (1971) is even faster, for sufficiently large n.