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Information explosion

The information explosion is the rapid increase in the amount of published information or data and the effects of this abundance. As the amount of available data grows, the problem of managing the information becomes more difficult, which can lead to information overload. The Online Oxford English Dictionary indicates use of the phrase in a March 1964 New Statesman article. The New York Times first used the phrase in its editorial content in an article by Walter Sullivan on June 7, 1964, in which he described the phrase as "much discussed". (p11.) The earliest known use of the phrase was in a speech about television by NBC president Pat Weaver at the Institute of Practitioners of Advertising in London on September 27, 1955. The speech was rebroadcast on radio station WSUI in Iowa and excerpted in the Daily Iowan newspaper two months later.

Many sectors are seeing this rapid increase in the amount of information available such as healthcare, supermarkets, and governments. Another sector that is being affected by this phenomenon is journalism. Such a profession, which in the past was responsible for the dissemination of information, may be suppressed by the overabundance of information today.

Techniques to gather knowledge from an overabundance of electronic information (e.g., data fusion may help in data mining) have existed since the 1970s. Another common technique to deal with such amount of information is qualitative research. Such approaches aim to organize the information, synthesizing, categorizing and systematizing in order to be more usable and easier to search.

Growth patterns

 * The world's technological capacity to store information grew from, optimally compressed, 2.6 exabytes in 1986 to 15.7 in 1993, over 54.5 in 2000, and to 295 exabytes in 2007.
 * The world's technological capacity to receive information through one-way broadcast networks was 432 exabytes of (optimally compressed) information in 1986, 715 (optimally compressed) exabytes in 1993, 1,200 (optimally compressed) exabytes in 2000, and 1,900 in 2007.
 * The world's effective capacity to exchange information through two-way telecommunication networks was 0.281 exabytes of (optimally compressed) information in 1986, 0.471 in 1993, 2.2 in 2000, and 65 (optimally compressed) exabytes in 2007.

A new metric that is being used in an attempt to characterize the growth in person-specific information, is the disk storage per person (DSP), which is measured in megabytes/person (where megabytes is 106 bytes and is abbreviated MB). Global DSP (GDSP) is the total rigid disk drive space (in MB) of new units sold in a year divided by the world population in that year. The GDSP metric is a crude measure of how much disk storage could possibly be used to collect person-specific data on the world population. In 1983, one million fixed drives with an estimated total of 90 terabytes were sold worldwide; 30MB drives had the largest market segment. In 1996, 105 million drives, totaling 160,623 terabytes were sold with 1 and 2 gigabyte drives leading the industry. By the year 2000, with 20GB drive leading the industry, rigid drives sold for the year are projected to total 2,829,288 terabytes Rigid disk drive sales to top $34 billion in 1997.

According to Latanya Sweeney, there are three trends in data gathering today:

Type 1. Expansion of the number of fields being collected, known as the “collect more” trend.

Type 2. Replace an existing aggregate data collection with a person-specific one, known as the “collect specifically” trend.

Type 3. Gather information by starting a new person-specific data collection, known as the “collect it if you can” trend.

Related terms
Since "information" in electronic media is often used synonymously with "data", the term information explosion is closely related to the concept of data flood (also dubbed data deluge). Sometimes the term information flood is used as well. All of those basically boil down to the ever-increasing amount of electronic data exchanged per time unit. The awareness about non-manageable amounts of data grew along with the advent of ever more powerful data processing since the mid-1960s.

Challenges
Even though the abundance of information can be beneficial in several levels, some problems may be of concern such as privacy, legal and ethical guidelines, filtering and data accuracy. Filtering refers to finding useful information in the middle of so much data, which relates to the job of data scientists. A typical example of a necessity of data filtering (data mining) is in healthcare since in the next years is due to have EHRs (Electronic Health Records) of patients available. With so much information available, the doctors will need to be able to identify patterns and select important data for the diagnosis of the patient. On the other hand, according to some experts, having so much public data available makes it difficult to provide data that is actually anonymous. Another point to take into account is the legal and ethical guidelines, which relates to who will be the owner of the data and how frequently he/she is obliged to the release this and for how long. With so many sources of data, another problem will be accuracy of such. An untrusted source may be challenged by others, by ordering a new set of data, causing a repetition in the information. According to Edward Huth, another concern is the accessibility and cost of such information. The accessibility rate could be improved by either reducing the costs or increasing the utility of the information. The reduction of costs according to the author, could be done by associations, which should assess which information was relevant and gather it in a more organized fashion.

Web servers
As of August 2005, there were over 70 million web servers. there were over 135 million web servers.

Blogs
According to Technorati, the number of blogs doubles about every 6 months with a total of 35.3 million blogs. This is an example of the early stages of logistic growth, where growth is approximately exponential, since blogs are a recent innovation. As the number of blogs approaches the number of possible producers (humans), saturation occurs, growth declines, and the number of blogs eventually stabilizes.

title: Information explosion


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Inch

The inch (symbol: in or prime (symbol)) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to $1⁄36$ yard or $1⁄12$ of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb.

Standards for the exact length of an inch have varied in the past, but since the adoption of the international yard during the 1950s and 1960s the inch has been based on the metric system and defined as exactly 25.4mm.

Name
The English word "inch" (ynce) was an early borrowing from Latin uncia ("one-twelfth; Roman inch; Roman ounce"). The vowel change from Latin to Old English  (which became Modern English ) is known as umlaut. The consonant change from the Latin (spelled c) to English  is palatalisation. Both were features of Old English phonology; see and  for more information.

"Inch" is cognate with "ounce" (ynse), whose separate pronunciation and spelling reflect its reborrowing in Middle English from Anglo-Norman unce and ounce.

In many other European languages, the word for "inch" is the same as or derived from the word for "thumb", as a man's thumb is about an inch wide (and this was even sometimes used to define the inch ). In the Dutch language a term for inch is engelse duim (english thumb). Examples include polzada ("inch") and polze ("thumb"); palec ("thumb"); Danish and tomme ("inch") tommel ("thumb"); duim (whence duim and дюйм); pouce; დუიმი, hüvelyk; pollice; polegada ("inch") and polegar ("thumb"); ("duim"); palec ("thumb"); pulgada ("inch") and pulgar ("thumb"); and tum ("inch") and tumme ("thumb").

Imperial or hybrid countries
The inch is a commonly used customary unit of length in the United States, Canada, and the United Kingdom. For the United Kingdom, guidance on public sector use states that, since 1 October 1995, without time limit, the inch (along with the foot) is to be used as a primary unit for road signs and related measurements of distance (with the possible exception of clearance heights and widths) and may continue to be used as a secondary or supplementary indication following a metric measurement for other purposes.

Worldwide
Inches are used for display screens (e.g. televisions and computer monitors) worldwide. It is the official Japanese standard for electronic parts, especially display screens, and is the industry standard throughout continental Europe for display screens (Germany being one of few countries to supplement it with centimetres in most stores ).

Inches are commonly used to specify the diameter of vehicle wheel rims, and the corresponding inner diameter of tyres in tyre codes.

SI countries
Both inch-based and millimeter-based hex keys are widely available for sale in Europe.

Technical details
The international standard symbol for inch is in (see ISO 31-1, Annex A) but traditionally the inch is denoted by a double prime, which is often approximated by a double quote symbol, and the foot by a prime, which is often approximated by an apostrophe. For example; three feet, two inches can be written as 3 2. (This is akin to how the first and second "cuts" of the hour are likewise indicated by prime and double prime symbols, and also the first and second cuts of the degree.)

Subdivisions of an inch are typically written using dyadic fractions with odd number numerators; for example, two and three-eighths of an inch would be written as $1⁄36$ and not as 2.375 nor as $1⁄12$. However, for engineering purposes fractions are commonly given to three or four places of decimals and have been for many years.

Equivalents
1 international inch is equal to:

 * 10,000 'tenths'
 * 1,000 thou or mil
 * 100 points or gries
 * 72 PostScript points
 * 10, 12, or 40 lines
 * 6 computer picas
 * 3 barleycorns
 * 25.4 millimetres exactly
 * 0.999998 US Survey inches
 * $2 3⁄8$ or 0.33$2 6⁄16$ palms
 * $1⁄9$ or 0.25 hands
 * $1⁄3$ or 0.0833$\overline{3}$ feet
 * $1⁄4$ or 0.0277$1⁄12$ yards

History

The earliest known reference to the inch in England is from the Laws of Æthelberht dating to the early 7th century, surviving in a single manuscript, the Textus Roffensis from 1120. Paragraph LXVII sets out the fine for wounds of various depths: one inch, one shilling; two inches, two shillings, etc.

An Anglo-Saxon unit of length was the barleycorn. After 1066, 1 inch was equal to 3 barleycorns, which continued to be its legal definition for several centuries, with the barleycorn being the base unit. One of the earliest such definitions is that of 1324, where the legal definition of the inch was set out in a statute of Edward II of England, defining it as "three grains of barley, dry and round, placed end to end, lengthwise".

Similar definitions are recorded in both English and Welsh medieval law tracts. One, dating from the first half of the 10th century, is contained in the Laws of Hywel Dda which superseded those of Dyfnwal, an even earlier definition of the inch in Wales. Both definitions, as recorded in Ancient Laws and Institutes of Wales (vol i., pp. 184, 187, 189), are that "three lengths of a barleycorn is the inch".

King David I of Scotland in his Assize of Weights and Measures (c. 1150) is said to have defined the Scottish inch as the width of an average man's thumb at the base of the nail, even including the requirement to calculate the average of a small, a medium, and a large man's measures. However, the oldest surviving manuscripts date from the early 14th century and appear to have been altered with the inclusion of newer material.

In 1814, Charles Butler, a mathematics teacher at Cheam School, recorded the old legal definition of the inch to be "three grains of sound ripe barley being taken out the middle of the ear, well dried, and laid end to end in a row", and placed the barleycorn, not the inch, as the base unit of the English Long Measure system, from which all other units were derived. John Bouvier similarly recorded in his 1843 law dictionary that the barleycorn was the fundamental measure. Butler observed, however, that "[a]s the length of the barley-corn cannot be fixed, so the inch according to this method will be uncertain", noting that a standard inch measure was now [i.e. by 1843] kept in the Exchequer chamber, Guildhall, and that was the legal definition of the inch.

This was a point also made by George Long in his 1842 Penny Cyclopædia, observing that standard measures had since surpassed the barleycorn definition of the inch, and that to recover the inch measure from its original definition, in case the standard measure were destroyed, would involve the measurement of large numbers of barleycorns and taking their average lengths. He noted that this process would not perfectly recover the standard, since it might introduce errors of anywhere between one hundredth and one tenth of an inch in the definition of a yard.

Before the adoption of the international yard and pound, various definitions were in use. In the United Kingdom and most countries of the British Commonwealth, the inch was defined in terms of the Imperial Standard Yard. The United States adopted the conversion factor 1 metre = 39.37 inches by an act in 1866. In 1893, Mendenhall ordered the physical realization of the inch to be based on the international prototype metres numbers 21 and 27, which had been received from the CGPM, together with the previously adopted conversion factor.

As a result of the definitions above, the U.S. inch was effectively defined as 25.4000508 mm (with a reference temperature of 68 degrees Fahrenheit) and the UK inch at 25.399977 mm (with a reference temperature of 62 degrees Fahrenheit). When Carl Edvard Johansson started manufacturing gauge blocks in inch sizes in 1912, Johansson's compromise was to manufacture gauge blocks with a nominal size of 25.4mm, with a reference temperature of 20 degrees Celsius, accurate to within a few parts per million of both official definitions. Because Johansson's blocks were so popular, his blocks became the de facto standard for manufacturers internationally, with other manufacturers of gauge blocks following Johansson's definition by producing blocks designed to be equivalent to his.

In 1930, the British Standards Institution adopted an inch of exactly 25.4 mm. The American Standards Association followed suit in 1933. By 1935, industry in 16 countries had adopted the "industrial inch" as it came to be known, effectively endorsing Johansson's pragmatic choice of conversion ratio.

In 1946, the Commonwealth Science Congress recommended a yard of exactly 0.9144 metres for adoption throughout the British Commonwealth. This was adopted by Canada in 1951; the United States on 1 July 1959;  Australia in 1961, effective 1 January 1964; and the United Kingdom in 1963, effective on 1 January 1964. The new standards gave an inch of exactly 25.4 mm, 1.7 millionths of an inch longer than the old imperial inch and 2 millionths of an inch shorter than the old US inch.

US survey inches
The United States retained the $\overline{3}$-metre definition for surveying, producing a 2 millionth part difference between standard and US survey inches. This is approximately $1⁄36$ inch per mile; 12.7 kilometres is exactly standard inches and exactly  survey inches. This difference is substantial when doing calculations in State Plane Coordinate Systems with coordinate values in the hundreds of thousands or millions of feet.

In 2020, the National Institute of Standards and Technology announced that the U.S. survey foot would "be phased out" on 1 January 2023 and be superseded by the international foot (also known as the foot) equal to 0.3048 metres exactly, for all further applications. This implies that the survey inch was replaced by the international inch.

Continental inches
Before the adoption of the metric system, several European countries had customary units whose name translates into "inch". The French pouce measured roughly 27.0 mm, at least when applied to describe the calibre of artillery pieces. The Amsterdam foot (voet) consisted of 11 Amsterdam inches (duim). The Amsterdam foot is about 8% shorter than an English foot.

Scottish inch
The now obsolete Scottish inch (òirleach), $\overline{7}$ of a Scottish foot, was about 1.0016 imperial inches (about 1.0016 in).

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Inch


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Inn

Inns are generally establishments or buildings where travelers can seek lodging, and usually, food and drink. Inns are typically located in the country or along a highway. Before the advent of motorized transportation, they also provided accommodation for horses.

An Innkeeper is the person who runs an inn.

History
Inns in Europe were possibly first established when the Romans built their system of Roman roads 2,000 years ago. Many inns in Europe are several centuries old. In addition to providing for the needs of travelers, inns traditionally acted as community gathering places.

Historically, inns provided not only food and lodging, but stabling and fodder for the travelers' horses, as well. Famous London examples of inns include The George and The Tabard. However, there is no longer a formal distinction between an inn and several other kinds of establishments: many pubs use the name "inn", either because they are long established and may have been formerly coaching inns, or to summon up a particular kind of image.

Inns were like bed and breakfasts, with a community dining room which was also used for town meetings or rented for wedding parties. The front, facing the road, was ornamental and welcoming for travelers. The back also usually had at least one livery barn for travelers to keep their horses. There were no lobbies as in modern inns; rather, the innkeeper would answer the door for each visitor and judge the people whom he decided to accommodate, it was up to the visitors to convince the innkeeper for accommodation. In some English towns, bye-laws would require innkeepers to offer all visitors a bed. Many inns were simply large houses that had extra rooms for renting.

In 14th century England, the courtyards of the inns were often not paved or cobbled but rather flattened earth or mud. These inns would be made of two-storey timber framed buildings with steep shingle roofs. Stableboys were in charge of stabling horses at the rear yard of the inn where they are watered and fed. Usual foods served included pottage, bread and cheese with ale for drinking. In some towns, innkeepers are only allowed to offer food and drinks to guests. The better managed inns would place fresh rushes on the floor, mixed with rose petals, lavender and herbs. Lighting would be dim, as candles were made of tallow. For toilet facilities, inns would simply provide a seat and a barrel which were emptied every morning. Beds would accommodate more than one man, sometimes even a dozen.

During the 19th century, the inn played a major role in the growing transportation system of England. Industry was on the rise, and people were traveling more in order to keep and maintain business. The English inn was considered an important part of English infrastructure, as it helped maintain a smooth flow of travel throughout the country.

As modes of transport have evolved, tourist lodging has adapted to serve each generation of traveller. A stagecoach made frequent stops at roadside coaching inns for water, food, and horses. A passenger train stopped only at designated stations in the city centre, around which were built grand railway hotels. Motorcar traffic on old-style two-lane highways might have paused at any camp, cabin court, or motel along the way, while freeway traffic was restricted to access from designated off-ramps to side roads which quickly become crowded with hotel chain operators.

The original functions of an inn are now usually split among separate establishments. For example, hotels, lodges and motels might provide the traditional functions of an inn but focus more on lodging customers than on other services; public houses (pubs) are primarily alcohol-serving establishments; and restaurants and taverns serve food and drink. (Hotels often contain restaurants serving full breakfasts and meals, thus providing all of the functions of traditional inns. Economy, limited service properties, however, lack a kitchen and bar, and therefore claim at most an included continental breakfast.)

The lodging aspect of the word inn lives on in some hotel brand names, like Holiday Inn, and the Inns of Court in London were once accommodations for members of the legal profession. Some laws refer to lodging operators as innkeepers.

Forms
Other forms of inns exist throughout the world. Among them are the honjin and ryokan of Japan, caravanserai of Central Asia and the Middle East, and Jiuguan in ancient China.

In Asia Minor, during the periods of rule by the Seljuq and Ottoman Turks, impressive structures functioning as inns (han) were built because inns were considered socially significant. These inns provided accommodations for people and either their vehicles or animals, and served as a resting place to those travelling on foot or by other means.

These inns were built between towns if the distance between municipalities was too far for one day's travel. These structures, called caravansarais, were inns with large courtyards and ample supplies of water for drinking and other uses. They typically contained a café, in addition to supplies of food and fodder. After the caravans traveled a while they would take a break at these caravansarais, and often spend the night to rest the human travellers and their animals.

Usage of the term
The term "inn" historically characterized a rural hotel which provided lodging, food and refreshments, and accommodations for travelers' horses. To capitalize on this nostalgic image many typically lower end and middling modern motor hotel operators seek to distance themselves from similar motels by styling themselves "inns", regardless of services and accommodations provided. Examples are Comfort Inn, Days Inn, Holiday Inn, Knights Inn, and Premier Inn.

The term "inn" is also retained in its historic use in many laws governing motels and hotels, often known as "innkeeper's acts", or refer to hôteliers and motel operators as "innkeepers" in the body of the legislation These laws typically define the innkeepers' liability for valuables entrusted to them by clients and determine whether an innkeeper holds any lien against such goods. In some jurisdictions, an offence named as "defrauding an innkeeper" prohibits fraudulently obtaining "food, lodging, or other accommodation at any hotel, inn, boarding house, or eating house"; in this context, the term is often an anachronism as the majority of modern restaurants are free-standing and not attached to coaching inns or tourist lodging.

title: Inn


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International Olympiad in Informatics

The International Olympiad in Informatics (IOI) is an annual competitive programming competition and one of the International Science Olympiads for secondary school students. The first IOI was held in 1989 in Pravetz, Bulgaria. It is the second largest science olympiad, after the International Mathematical Olympiad, in terms of number of participating countries (88 at IOI 2022). Each country sends a team of up to four students, plus one team leader, one deputy leader, and guests.

The contest consists of two days of computer programming/coding and problem-solving of algorithmic nature. To deal with problems involving very large amounts of data, it is necessary to have not only programmers, "but also creative coders, who can dream up what it is that the programmers need to tell the computer to do. The hard part isn't the programming, but the mathematics underneath it."

Students in each country are selected for their country's team through national computing contests. Students at the IOI compete on an individual basis. There is no official team ranking.

The IOI is one of the most prestigious computer science competitions in the world. UNESCO and IFIP are patrons.

Competition structure and participation

On each of the two competition days, the students are typically given three problems which they have to solve in five hours. Each student works on his/her own, with only a computer and no other help allowed, specifically no communication with other contestants, books etc. Usually to solve a task the contestant has to write a computer program (only in C++) and submit it before the five-hour competition time ends. The program is graded by being run with secret test data. From IOI 2010, tasks are divided into subtasks with graduated difficulty, and points are awarded only when all tests for a particular subtask yield correct results, within specific time and memory limits. In some cases, the contestant's program has to interact with a secret computer library, which allows problems where the input is not fixed, but depends on the program's actions – for example in game problems. Another type of problem has known inputs which are publicly available already during the five hours of the contest. For these, the contestants have to submit an output file instead of a program, and it is up to them whether they obtain the output files by writing a program (possibly exploiting special characteristics of the input), or by hand, or by a combination of these means. Pascal has been removed as an available programming language as of 2019. :11

IOI 2010 for the first time had a live web scoreboard with real-time provisional results. Submissions will be scored as soon as possible during the contest, and the results posted. Contestants will be aware of their scores, but not others', and may resubmit to improve their scores. Starting from 2012, IOI has been using the Contest Management System (CMS) for developing and monitoring the contest.

The scores from the two competition days and all problems are summed up separately for each contestant. At the awarding ceremony, contestants are awarded medals depending on their relative total score. The top 50% of the contestants are awarded medals, such that the relative number of gold : silver : bronze : no medal is approximately 1:2:3:6 (thus 1/12 of the contestants get a gold medal).

Prior to IOI 2010, students who did not receive medals did not have their scores published, making it impossible for a country to be ranked by adding together scores of its competitors unless each wins a medal. From IOI 2010, although the scores of students who did not receive medals are still not available in the official results, they are known from the live web scoreboard. In IOI 2012 the top 3 nations ranked by aggregate score (Russia, China and USA) were subsequently awarded during the closing ceremony.

Analysis of female performance shows 77.9% of women obtain no medal, while 49.2% of men obtain no medal. "The average female participation was 4.4% in 1989–1994 and 2.2% in 1996–2014." It also suggests much higher participation of women on the national level, claiming sometimes double-digit percentages in total participation on the first stage. President of the IOI (2011-2014), Richard Forster, says the competition has difficulty attracting women and that in spite of trying to solve it, "none of us have hit on quite what the problem is, let alone the solution."

In IOI 2017 held in Iran, due to not being able to participate in Iran, the Israeli students participated in an offsite competition organized by IOI in Russia. :11 Due to visa issues, the full USA team was unable to attend, although one contestant Zhezheng Luo was able to attend by traveling with the Chinese team and winning gold medal and 3rd place in standings.

In IOI 2019 held in Azerbaijan, the Armenia team did not participate due to the dispute between the two countries, despite the guarantees provided and official invitation letter sent by the host Azerbaijan.

Due to the COVID-19 pandemic, both the IOI 2020 and IOI 2021, originally scheduled to be hosted by Singapore, were held as online contests. The IOI 2022, hosted by Indonesia, was held as a hybrid event, with around 25% of the contestants participating online.

Members

 * 🇦🇱 Albania
 * 🇩🇿 Algeria
 * 🇦🇷 Argentina
 * 🇦🇲 Armenia
 * 🇦🇺 Australia
 * 🇦🇹 Austria
 * 🇦🇿 Azerbaijan
 * 🇧🇩 Bangladesh
 * 🇧🇾 Belarus
 * 🇧🇪 Belgium
 * 🇧🇴 Bolivia
 * 🇧🇦 Bosnia and Herzegovina
 * 🇧🇷 Brazil
 * 🇧🇬 Bulgaria
 * 🇨🇦 Canada
 * 🇨🇱 Chile
 * 🇨🇳 China
 * 🇨🇴 Colombia
 * 🇭🇷 Croatia
 * 🇨🇺 Cuba
 * 🇨🇾 Cyprus
 * 🇨🇿 Czech Republic
 * 🇩🇰 Denmark
 * 🇩🇴 Dominican Republic
 * 🇪🇨 Ecuador
 * 🇪🇬 Egypt
 * 🇸🇻 El Salvador
 * 🇪🇪 Estonia
 * 🇫🇮 Finland
 * 🇫🇷 France
 * Georgia
 * 🇩🇪 Germany
 * 🇬🇷 Greece
 * 🇭🇰 Hong Kong
 * 🇭🇺 Hungary
 * 🇮🇸 Iceland
 * 🇮🇳 India
 * 🇮🇩 Indonesia
 * 🇮🇷 Iran
 * 🇮🇪 Ireland
 * 🇮🇱 Israel
 * 🇮🇹 Italy
 * 🇯🇵 Japan
 * 🇯🇴 Jordan
 * 🇰🇿 Kazakhstan
 * 🇰🇬 Kyrgyzstan
 * 🇱🇻 Latvia
 * 🇱🇾 Libya
 * 🇱🇹 Lithuania
 * 🇱🇺 Luxembourg
 * Macau
 * 🇲🇾 Malaysia
 * 🇲🇽 Mexico
 * 🇲🇩 Moldova
 * 🇲🇳 Mongolia
 * 🇲🇪 Montenegro
 * 🇲🇦 Morocco
 * 🇳🇱 Netherlands
 * 🇳🇿 New Zealand
 * 🇳🇬 Nigeria
 * North Macedonia
 * 🇳🇴 Norway
 * 🇵🇰 Pakistan
 * Palestine
 * 🇵🇪 Peru
 * 🇵🇭 Philippines
 * 🇵🇱 Poland
 * 🇵🇹 Portugal
 * 🇷🇴 Romania
 * 🇷🇺 Russia
 * 🇷🇼 Rwanda
 * 🇸🇦 Saudi Arabia
 * 🇷🇸 Serbia
 * 🇸🇬 Singapore
 * 🇸🇰 Slovakia
 * 🇸🇮 Slovenia
 * 🇿🇦 South Africa
 * 🇰🇷 South Korea
 * 🇪🇸 Spain
 * 🇱🇰 Sri Lanka
 * 🇸🇪 Sweden
 * 🇨🇭 Switzerland
 * Syria
 * 🇹🇼 Taiwan
 * 🇹🇯 Tajikistan
 * 🇹🇭 Thailand
 * 🇹🇳 Tunisia
 * 🇹🇷 Turkey
 * 🇹🇲 Turkmenistan
 * 🇺🇦 Ukraine
 * 🇬🇧 United Kingdom
 * 🇺🇸 United States
 * 🇺🇿 Uzbekistan
 * 🇻🇪 Venezuela
 * Vietnam

Former members

 * 🇬🇦 Gabon
 * 🇬🇭 Ghana
 * 🇰🇼 Kuwait
 * 🇲🇬 Madagascar
 * 🇲🇹 Malta
 * 🇲🇺 Mauritius
 * 🇲🇿 Mozambique
 * 🇸🇩 Sudan
 * 🇹🇹 Trinidad and Tobago
 * 🇦🇪 United Arab Emirates
 * 🇿🇼 Zimbabwe

Multiple IOI winners
The following is a list of the top performers in the history of the IOI. The P sign indicates a perfect score, a rare achievement in IOI history. The U sign indicates an unofficial participation, where a contestant participated in a host's second team. Also, first (I), second (II) and third (III) places among gold medalists are indicated where appropriate.

Feeder competitions
Most participating countries use feeder competitions to select their team. A number of these are listed below:

• Australian Informatics Olympiad

• British Informatics Olympiad

• Canadian Computing Olympiad

• : The participants of which are chosen from the Canadian Computing Competition

• Central European Olympiad in Informatics

• Indian Computing Olympiad

• National Olympiad in Informatics

• National Olympiad in Informatics, China

• Ro:Olimpiada Națională de Informatică

• NL:Nederlandse Informatica Olympiade

• Es:Olimpiada Mexicana de Informática

• South African Computer Olympiad

• Syrian Olympiad in Informatics

• Turkish Informatics Olympiad

• United States of America Computing Olympiad

• Moroccan Olympiad in Informatics

• All Ireland Programming Olympiad

• Indonesian Olympiad in Informatics

• Egyptian Olympiad in Informatics

• National Olympiad in Informatics - Philippines

• Bundeswettbewerb Informatik - Germany

• Vietnamese Olympiad in Informatics

title: International Olympiad in Informatics


text:
Iota

Iota (uppercase Ι, lowercase ι; ιώτα) is the ninth letter of the Greek alphabet. It was derived from the Phoenician letter Yodh. Letters that arose from this letter include the Latin I and J, the Cyrillic І (І, і), Yi (Ї, ї), and Je (Ј, ј), and iotated letters (e.g. Yu (Ю, ю)). In the system of Greek numerals, iota has a value of 10.

Iota represents the close front unrounded vowel. In early forms of ancient Greek, it occurred in both long and short  versions, but this distinction was lost in Koine Greek. Iota participated as the second element in falling diphthongs, with both long and short vowels as the first element. Where the first element was long, the iota was lost in pronunciation at an early date, and was written in polytonic orthography as iota subscript, in other words as a very small ι under the main vowel. Examples include ᾼ ᾳ ῌ ῃ ῼ ῳ. The former diphthongs became digraphs for simple vowels in Koine Greek.

The word is used in a common English phrase, "not one iota", meaning "not the slightest amount". This refers to iota, the smallest letter, or possibly yodh, י, the smallest letter in the Hebrew alphabet. The English word jot derives from iota. The German, Polish, Portuguese, and Spanish name for the letter J (Jot / jota) is derived from iota.

Symbol

 * In some programming languages (e.g., A+, APL, C++, Go ), iota (either as the lowercase symbol  or the identifier  ) is used to represent and generate an array of consecutive integers. For example, in APL   gives.
 * The lowercase iota symbol is sometimes used to write the imaginary unit, but more often Roman i or j is used.
 * In mathematics, the inclusion map of one space into another is sometimes denoted by the lowercase iota.
 * In logic, the lowercase iota denotes the definite descriptor.
 * The lowercase iota symbol has Unicode code point U+03B9 and the uppercase U+0399.

Mathematical Iota
These characters are used only as mathematical symbols. Stylized Greek text should be encoded using the normal Greek letters, with markup and formatting to indicate text style.

title: Iota


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ISP (disambiguation)

ISP often refers to Internet service provider. ISP may also refer to:

Places

 * Islip railway station (Network Rail station code ISP), England
 * Long Island MacArthur Airport (IATA Airport code ISP), New York, US

Education

 * Information Society Project, at Yale Law School
 * Institute of Southern Punjab, a university in Pakistan
 * Instituto Superior Politécnico, a university in São Tomé and Príncipe
 * Institut supérieur de philosophie, the Higher Institute of Philosophy in Louvain-la-Neuve, Belgium
 * Integrated science program, an honors program at Northwestern University
 * International School of Panama
 * International School of Paris, France
 * International School of Prague, Czech Republic
 * Petnica Science Center (Istraživačka Stanica Petnica)

Law enforcement

 * Idaho State Police
 * Illinois State Police
 * Indiana State Police
 * Iowa State Patrol
 * Iowa State Penitentiary, Fort Madison, Iowa, US

Organizations and agencies

 * Illinois State Police
 * Indiana State Police
 * Independence for Scotland Party
 * Independent Socialist Party (disambiguation), in several countries
 * ISP Sports, US marketing and broadcast company
 * National Inspectorate of Strategic Products (Sweden) (Inspektionen för strategiska produkter)
 * Institute of Sales Promotion, UK
 * Integrated Service Provider, a type of logistics services firm
 * Intesa Sanpaolo, Italian bank
 * Sovereign and Popular Italy (Italia Sovrana e Popolare), Italian political party

Computing

 * Image signal processor
 * In-system programming, of programmable logic devices in-circuit
 * Information Systems Professional, an information technology title and post-nominal
 * Interface segregation principle, a principle of object-oriented design
 * Internet service provider, an organization that provides services for accessing, using, or participating in the Internet
 * ISP Formal Verification Tool, a verification tool for MPI (Message Passing Interface) programs

Other uses in science and technology

 * Imperial smelting process, in zinc smelting
 * Polarization in astronomy, interstellar polarization
 * Specific impulse (Isp), a measure of rocket and jet efficiency

title: ISP (disambiguation)


text:
Talk:Inuit

— Preceding unsigned comment added by 206.57.234.2 (talk) 16:41, 18 March 2019 (UTC)

Data
https://www.smithsonianmag.com/science-nature/ancient-dna-reveals-complex-story-human-migration-between-siberia-and-north-america-180972356/

Ainu
is there a change that Ainu people from Japan have the same historic grounds as Inuit? https://en.wikipedia.org/wiki/Ainu_people There are some simularities like kayak building and the way the fish. The area from Inuit is very large and the Ainu grounds are connected with a shorter distance then from Greenland to Alaska. That seems relative short. Both Ainu and Inuit are very old tribes.85.149.83.125 (talk) 15:03, 31 August 2022 (UTC)

There may be (but far far in the past) but Aleutians are probably more closely related. But also Siberians.

Ann — Preceding unsigned comment added by 2607:FEA8:4A2:4100:4CB0:E73A:71E:EC76 (talk) 06:14, 27 November 2022 (UTC)

5 point about Inuit how they live, what they eat,what are they called, about their art and culture
Different things 111.88.176.217 (talk) 05:16, 19 March 2023 (UTC)

title: Talk:Inuit


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Erectile dysfunction

Erectile dysfunction (ED), also referred to as impotence, is a form of sexual dysfunction in males characterized by the persistent or recurring inability to achieve or maintain a penile erection with sufficient rigidity and duration for satisfactory sexual activity. It is the most common sexual problem in males and can cause psychological distress due to its impact on self-image and sexual relationships.

The majority of ED cases are attributed to physical risk factors and predictive factors. These factors can be categorized as vascular, neurological, local penile, hormonal, and drug-induced. Notable predictors of ED include aging, cardiovascular disease, diabetes mellitus, high blood pressure, obesity, abnormal lipid levels in the blood, hypogonadism, smoking, depression, and medication use. Approximately 10% of cases are linked to psychosocial factors, encompassing conditions like depression, stress, and problems within relationships.

The term erectile dysfunction does not encompass other erection-related disorders, such as priapism.

Treatment of ED encompasses addressing the underlying causes, lifestyle modification, and addressing psychosocial issues. In many instances, medication-based therapies are used, specifically PDE5 inhibitors like sildenafil. These drugs function by dilating blood vessels, facilitating increased blood flow into the spongy tissue of the penis, analogous to opening a valve wider to enhance water flow in a fire hose. Less frequently employed treatments encompass prostaglandin pellets inserted into the urethra, the injection of smooth-muscle relaxants and vasodilators directly into the penis, penile implants, the use of penis pumps, and vascular surgery.

ED is reported in 18% of males aged 50 to 59 years, and 37% in males aged 70 to 75.

Signs and symptoms
ED is characterized by the persistent or recurring inability to achieve or maintain an erection of the penis with sufficient rigidity and duration for satisfactory sexual activity. It is defined as the "persistent or recurrent inability to achieve and maintain a penile erection of sufficient rigidity to permit satisfactory sexual activity for at least 3 months."

Psychological impact
ED often has an impact on the emotional well-being of both males and their partners. Many males do not seek treatment due to feelings of embarrassment. About 75% of diagnosed cases of ED go untreated.

Causes
Causes of or contributors to ED include the following: Surgical intervention for a number of conditions may remove anatomical structures necessary to erection, damage nerves, or impair blood supply. ED is a common complication of treatments for prostate cancer, including prostatectomy and destruction of the prostate by external beam radiation, although the prostate gland itself is not necessary to achieve an erection. As far as inguinal hernia surgery is concerned, in most cases, and in the absence of postoperative complications, the operative repair can lead to a recovery of the sexual life of people with preoperative sexual dysfunction, while, in most cases, it does not affect people with a preoperative normal sexual life.
 * Diets high in saturated fat are linked to heart diseases, and males with heart diseases are more likely to experience ED. By contrast, plant-based diets show a lower risk for ED.
 * Prescription drugs (e.g., SSRIs, beta blockers, antihistamines,  alpha-2 adrenergic receptor agonists, thiazides, hormone modulators, and 5α-reductase inhibitors)
 * Neurogenic disorders (e.g., diabetic neuropathy, temporal lobe epilepsy, multiple sclerosis, Parkinson's disease, multiple system atrophy)
 * Cavernosal disorders (e.g., Peyronie's disease)
 * Hyperprolactinemia (e.g., due to a prolactinoma)
 * Psychological causes: performance anxiety, stress, and mental disorders
 * Surgery (e.g., radical prostatectomy)
 * Ageing: after age 40 years, ageing itself is a risk factor for ED, although numerous other pathologies that may occur with ageing, such as testosterone deficiency, cardiovascular diseases, or diabetes, among others, appear to have interacting effects
 * Kidney disease: ED and chronic kidney disease have pathological mechanisms in common, including vascular and hormonal dysfunction, and may share other comorbidities, such as hypertension and diabetes mellitus that can contribute to ED
 * Lifestyle habits, particularly smoking, which is a key risk factor for ED as it promotes arterial narrowing.  Due to its propensity for causing detumescence and erectile dysfunction, some studies have described tobacco as an anaphrodisiacal substance.
 * COVID-19: preliminary research indicates that COVID-19 viral infection may affect sexual and reproductive health.

ED can also be associated with bicycling due to both neurological and vascular problems due to compression. The increased risk appears to be about 1.7-fold.

Concerns that use of pornography can cause ED have little support in epidemiological studies, according to a 2015 literature review. According to Gunter de Win, a Belgian professor and sex researcher, "Put simply, respondents who watch 60 minutes a week and think they're addicted were more likely to report sexual dysfunction than those who watch a care-free 160 minutes weekly."

In seemingly rare cases, medications such as SSRIs, isotretinoin (Accutane) and finasteride (Propecia) are reported to induce long-lasting iatrogenic disorders characterized by sexual dysfunction symptoms, including erectile dysfunction in males; these disorders are known as post-SSRI sexual dysfunction (PSSD), post-retinoid sexual dysfunction/post-Accutane syndrome (PRSD/PAS), and post-finasteride syndrome (PFS). These conditions remain poorly understood and lack effective treatments, although they have been suggested to share a common etiology.

Pathophysiology
Penile erection is managed by two mechanisms: the reflex erection, which is achieved by directly touching the penile shaft, and the psychogenic erection, which is achieved by erotic or emotional stimuli. The former involves the peripheral nerves and the lower parts of the spinal cord, whereas the latter involves the limbic system of the brain. In both cases, an intact neural system is required for a successful and complete erection. Stimulation of the penile shaft by the nervous system leads to the secretion of nitric oxide (NO), which causes the relaxation of the smooth muscles of the corpora cavernosa (the main erectile tissue of the penis), and subsequently penile erection. Additionally, adequate levels of testosterone (produced by the testes) and an intact pituitary gland are required for the development of a healthy erectile system. As can be understood from the mechanisms of a normal erection, impotence may develop due to hormonal deficiency, disorders of the neural system, lack of adequate penile blood supply or psychological problems. Spinal cord injury causes sexual dysfunction, including ED. Restriction of blood flow can arise from impaired endothelial function due to the usual causes associated with coronary artery disease, but can also be caused by prolonged exposure to bright light.

Diagnosis
In many cases, the diagnosis can be made based on the person's history of symptoms. In other cases, a physical examination and laboratory investigations are done to rule out more serious causes such as hypogonadism or prolactinoma.

One of the first steps is to distinguish between physiological and psychological ED. Determining whether involuntary erections are present is important in eliminating the possibility of psychogenic causes for ED. Obtaining full erections occasionally, such as nocturnal penile tumescence when asleep (that is, when the mind and psychological issues, if any, are less present), tends to suggest that the physical structures are functionally working. Similarly, performance with manual stimulation, as well as any performance anxiety or acute situational ED, may indicate a psychogenic component to ED.

Another factor leading to ED is diabetes mellitus, a well known cause of neuropathy. ED is also related to generally poor physical health, poor dietary habits, obesity, and most specifically cardiovascular disease, such as coronary artery disease and peripheral vascular disease. Screening for cardiovascular risk factors, such as smoking, dyslipidemia, hypertension, and alcoholism, is helpful.

In some cases, the simple search for a previously undetected groin hernia can prove useful since it can affect sexual functions in males and is relatively easily curable.

The current diagnostic and statistical manual of mental diseases (DSM-IV) lists ED.

Ultrasonography
Penile ultrasonography with doppler can be used to examine the erect penis. Most cases of ED of organic causes are related to changes in blood flow in the corpora cavernosa, represented by occlusive artery disease (in which less blood is allowed to enter the penis), most often of atherosclerotic origin, or due to failure of the veno-occlusive mechanism (in which too much blood circulates back out of the penis). Before the Doppler sonogram, the penis should be examined in B mode, in order to identify possible tumors, fibrotic plaques, calcifications, or hematomas, and to evaluate the appearance of the cavernous arteries, which can be tortuous or atheromatous.

Erection can be induced by injecting 10–20 μg of prostaglandin E1, with evaluations of the arterial flow every five minutes for 25–30 min (see image). The use of prostaglandin E1 is contraindicated in patients with predisposition to priapism (e.g., those with sickle cell anemia), anatomical deformity of the penis, or penile implants. Phentolamine (2 mg) is often added. Visual and tactile stimulation produces better results. Some authors recommend the use of sildenafil by mouth to replace the injectable drugs in cases of contraindications, although the efficacy of such medication is controversial.

Before the injection of the chosen drug, the flow pattern is monophasic, with low systolic velocities and an absence of diastolic flow. After injection, systolic and diastolic peak velocities should increase, decreasing progressively with vein occlusion and becoming negative when the penis becomes rigid (see image below). The reference values vary across studies, ranging from > 25 cm/s to > 35 cm/s. Values above 35 cm/s indicate the absence of arterial disease, values below 25 cm/s indicate arterial insufficiency, and values of 25–35 cm/s are indeterminate because they are less specific (see image below). The data obtained should be correlated with the degree of erection observed. If the peak systolic velocities are normal, the final diastolic velocities should be evaluated, those above 5 cm/s being associated with venogenic ED.

Other workup methods

 * Penile nerves function:Tests such as the bulbocavernosus reflex test are used to ascertain whether there is enough nerve sensation in the penis. The physician squeezes the glans (head) of the penis, which immediately causes the anus to contract if nerve function is normal. A physician measures the latency between squeeze and contraction by observing the anal sphincter or by feeling it with a gloved finger in the anus.

 * Nocturnal penile tumescence (NPT):It is normal for a man to have five to six erections during sleep, especially during rapid eye movement (REM). Their absence may indicate a problem with nerve function or blood supply in the penis. There are two methods for measuring changes in penile rigidity and circumference during nocturnal erection: snap gauge and strain gauge. A significant proportion of males who have no sexual dysfunction nonetheless do not have regular nocturnal erections.

 * Penile biothesiometry:This test uses electromagnetic vibration to evaluate sensitivity and nerve function in the glans and shaft of the penis.

 * Dynamic infusion cavernosometry (DICC):Technique in which fluid is pumped into the penis at a known rate and pressure. It gives a measurement of the vascular pressure in the corpus cavernosum during an erection.

 * Corpus cavernosometry:Cavernosography measurement of the vascular pressure in the corpus cavernosum. Saline is infused under pressure into the corpus cavernosum with a butterfly needle, and the flow rate needed to maintain an erection indicates the degree of venous leakage. The leaking veins responsible may be visualized by infusing a mixture of saline and x-ray contrast medium and performing a cavernosogram. In Digital Subtraction Angiography (DSA), the images are acquired digitally.

 * Magnetic resonance angiography (MRA): This is similar to magnetic resonance imaging. Magnetic resonance angiography uses magnetic fields and radio waves to provide detailed images of the blood vessels. The doctor may inject into the patient's bloodstream a contrast agent, which causes vascular tissues to stand out against other tissues, so that information about blood supply and vascular anomalies is easier to gather.

Treatment
Treatment depends on the underlying cause. In general, exercise, particularly of the aerobic type, is effective for preventing ED during midlife. Counseling can be used if the underlying cause is psychological, including how to lower stress or anxiety related to sex. Medications by mouth and vacuum erection devices are first-line treatments, followed by injections of drugs into the penis, as well as penile implants. Vascular reconstructive surgeries are beneficial in certain groups. Treatments, other than surgery, do not fix the underlying physiological problem, but are used as needed before sex.

Medications
The PDE5 inhibitors sildenafil (Viagra), vardenafil (Levitra) and tadalafil (Cialis) are prescription drugs which are taken by mouth. As of 2018, sildenafil is available in the UK without a prescription. Additionally, a cream combining alprostadil with the permeation enhancer DDAIP has been approved in Canada as a first line treatment for ED. Penile injections, on the other hand, can involve one of the following medications: papaverine, phentolamine, and prostaglandin E1, also known as alprostadil. In addition to injections, there is an alprostadil suppository that can be inserted into the urethra. Once inserted, an erection can begin within 10 minutes and last up to an hour. Medications to treat ED may cause a side effect called priapism.

Prevalence of medical diagnosis
In a study published in 2016, based on US health insurance claims data, out of 19,833,939 US males aged ≥18 years, only 1,108,842 (5.6%), were medically diagnosed with erectile dysfunction or on a PDE5I prescription (μ age 55.2 years, σ 11.2 years). Prevalence of diagnosis or prescription was the highest for age group 60–69 at 11.5%, lowest for age group 18–29 at 0.4%, and 2.1% for 30–39, 5.7% for 40–49, 10% for 50–59, 11% for 70–79, 4.6% for 80–89, 0.9% for ≥90, respectively.

Focused shockwave therapy
Focused shockwave therapy involves passing short, high frequency acoustic pulses through the skin and into the penis. These waves break down any plaques within the blood vessels, encourage the formation of new vessels, and stimulate repair and tissue regeneration.

Focused shockwave therapy appears to work best for males with vasculogenic ED, which is a blood vessel disorder that affects blood flow to tissue in the penis. The treatment is painless and has no known side effects. Treatment with shockwave therapy can lead to a significant improvement of the IIEF (International Index of Erectile Function).

Testosterone
Men with low levels of testosterone can experience ED. Taking testosterone may help maintain an erection. Males with type 2 diabetes are twice as likely to have lower levels of testosterone, and are three times more likely to experience ED than non-diabetic men.

Pumps
A vacuum erection device helps draw blood into the penis by applying negative pressure. This type of device is sometimes referred to as penis pump and may be used just prior to sexual intercourse. Several types of FDA approved vacuum therapy devices are available under prescription. When pharmacological methods fail, a purpose-designed external vacuum pump can be used to attain erection, with a separate compression ring fitted to the base of the penis to maintain it. These pumps should be distinguished from other penis pumps (supplied without compression rings) which, rather than being used for temporary treatment of impotence, are claimed to increase penis length if used frequently, or vibrate as an aid to masturbation. More drastically, inflatable or rigid penile implants may be fitted surgically.

Vibrators
The vibrator was invented in the late 19th century as a medical instrument for pain relief and the treatment of various ailments. Sometimes described as a massager, the vibrator is used on the body to produce sexual stimulation. Several clinical studies have found vibrators to be an effective solution for Erectile Dysfunction. Examples of FDA registered vibrators for erectile dysfunction include MysteryVibe's Tenuto and Reflexonic's Viberect.

Surgery
Often, as a last resort, if other treatments have failed, the most common procedure is prosthetic implants which involves the insertion of artificial rods into the penis. Some sources show that vascular reconstructive surgeries are viable options for some people.

Alternative medicine
The Food and Drug Administration (FDA) does not recommend alternative therapies to treat sexual dysfunction. Many products are advertised as "herbal viagra" or "natural" sexual enhancement products, but no clinical trials or scientific studies support the effectiveness of these products for the treatment of ED, and synthetic chemical compounds similar to sildenafil have been found as adulterants in many of these products. The FDA has warned consumers that any sexual enhancement product that claims to work as well as prescription products is likely to contain such a contaminant. A 2021 review indicated that ginseng had "only trivial effects on erectile function or satisfaction with intercourse compared to placebo".

History
Attempts to treat the symptoms described by ED date back well over 1,000 years. In the 8th century, males of Ancient Rome and Greece wore talismans of rooster and goat genitalia, believing these talismans would serve as an aphrodisiac and promote sexual function. In the 13th century, Albertus Magnus recommended ingesting roasted wolf penis as a remedy for impotence. During the late 16th and 17th centuries in France, male impotence was considered a crime, as well as legal grounds for a divorce. The practice, which involved inspection of the complainants by court experts, was declared obscene in 1677.

The first major publication describing a broad medicalization of sexual disorders was the first edition of the Diagnostic and Statistical Manual of Mental Disorders in 1952. In the early 20th century, medical folklore held that 90-95% of cases of ED were psychological in origin, but around the 1980s research took the opposite direction of searching for physical causes of sexual dysfunction, which also happened in the 1920s and 30s. Physical causes as explanations continue to dominate literature when compared with psychological explanations.

Treatments in the 80s for ED included penile implants and intracavernosal injections. The first successful vacuum erection device, or penis pump, was developed by Vincent Marie Mondat in the early 1800s. A more advanced device based on a bicycle pump was developed by Geddings Osbon, a Pentecostal preacher, in the 1970s. In 1982, he received FDA approval to market the product. John R. Brinkley initiated a boom in male impotence treatments in the U.S. in the 1920s and 1930s, with radio programs that recommended expensive goat gland implants and "mercurochrome" injections as the path to restored male virility, including operations by surgeon Serge Voronoff.

Modern drug therapy for ED made a significant advance in 1983, when British physiologist Giles Brindley dropped his trousers and demonstrated to a shocked Urodynamics Society audience showing his papaverine-induced erection. The current most common treatment for ED, the oral PDE5 inhibitor known as sildenafil (Viagra) was approved for use for Pfizer by the FDA in 1998, which at the time of release was the fastest selling drug in history. Sildenafil largely replaced SSRI treatments for ED at the time and proliferated new types of specialised pharmaceutical marketing which emphasised social connotations of ED and Viagra rather than its physical effects.

Anthropology
Anthropological research presents ED not as a disorder but, as a normal, and sometimes even welcome sign of healthy aging. Wentzell's study of 250 Mexican males in their 50s and 60s found that "most simply did not see decreasing erectile function as a biological pathology". The males interviewed described the decrease in erectile function "as an aid for aging in socially appropriate ways". A common theme amongst the interviewees showed that respectable older males shifted their focus toward the domestic sphere into a "second stage of life". The Mexican males of this generation often pursued sex outside of marriage; decreasing erectile function acted as an aid to overcoming infidelity thus helping to attain the ideal "second stage" of life. A 56-year-old about to retire from the public health service said he would now "dedicate myself to my wife, the house, gardening, caring for the grandchildren—the Mexican classic". Wentzell found that treating ED as a pathology was antithetical to the social view these males held of themselves, and their purpose at this stage of their lives.

In the 20th and 21st centuries, anthropologists investigated how common treatments for ED are built upon assumptions of institutionalized social norms. In offering a range of clinical treatments to 'correct' a person's ability to produce an erection, biomedical institutions encourage the public to strive for prolonged sexual function. Anthropologists argue that a biomedical focus places emphasis on the biological processes of fixing the body thereby disregarding holistic ideals of health and aging. By relying on a wholly medical approach, Western biomedicine can become blindsided by bodily dysfunctions which can be understood as appropriate functions of age, and not as a medical problem. Anthropologists understand that a biosocial approach to ED considers a person's decision to undergo clinical treatment more likely a result of "society, political economy, history, and culture" than a matter of personal choice. In rejecting biomedical treatment for ED, males can challenge common forms of medicalized social control by deviating from what is considered the normal approach to dysfunction.

Lexicology
The Latin term impotentia coeundi describes simple inability to insert the penis into the vagina; it is now mostly replaced by more precise terms, such as erectile dysfunction (ED). The study of ED within medicine is covered by andrology, a sub-field within urology. Research indicates that ED is common, and it is suggested that approximately 40% of males experience symptoms compatible with ED, at least occasionally. The condition is also on occasion called phallic impotence. Its antonym, or opposite condition, is priapism.

title: Erectile dysfunction