Sport in childhood. Association football, shown above, is a team sport which also provides opportunities to nurture physical fitness and social interaction skills.

Sport (or, in the United States, sports) is all forms of competitive physical activity which,^[1] through casual or organised participation, aim to use, maintain or improve physical fitness and provide entertainment to participants.^[2] Hundreds of sports exist, from those requiring only two participants, through to those with hundreds of simultaneous participants, either in teams or competing as individuals.

Sport is generally recognised as activities which are based in physical athleticism or physical dexterity, with the largest major competitions such as the Olympic Games admitting only sports meeting this definition,^[3] and other organisations such as the Council of Europe using definitions precluding activities without a physical element from classification as sports.^[2] However, a number of competitive, but non-physical, activities claim recognition as mind sports. The International Olympic Committee (through ARISF) recognises both chess and bridge as bona fide sports, and SportAccord, the international sports federation association, recognises five non-physical sports,^[4][5] although limits the amount of mind games which can be admitted as sports.^[1]

Sports are usually governed by a set of rules or customs, which serve to ensure fair competition, and allow consistent adjudication of the winner. Winning can by determined by physical events such as scoring goals or crossing a line first, or by the determination of judges who are scoring elements of the sporting performance, including objective or subjective measures such as technical performance or artistic impression.

In organised sport, records of performance are often kept, and for popular sports, this information may be widely announced or reported in sport news. In addition, sport is a major source of entertainment for non-participants, with spectator sports drawing large crowds to venues, and reaching wider audiences through sports broadcasting.

Meaning and usage[link]

Etymology[link]

Look up sport in Wiktionary, the free dictionary.

"Sport" comes from the Old French desport meaning "leisure", with the oldest definition in English from around 1300 being "anything humans find amusing or entertaining".^[6]

The French word for sport is based on the Persian word bord, meaning "winning" or "win".^{[citation needed]} The Chinese term for sport, tiyu (体育; 體育) connotes physical training. The modern Greek term for sport is Αθλητισμός (athlitismos), directly cognate with the English terms "athlete" and "athleticism".

Other meanings include gambling and events staged for the purpose of gambling; hunting; and games and diversions, including ones that require exercise.^[7] Roget's defines the noun sport as an "activity engaged in for relaxation and amusement" with synonyms including diversion and recreation.^[8]

Nomenclature[link]

The singular term 'sport' is used in most English dialects to decribe the overall concept (e.g. "children taking part in sport"), with 'sports' used to describe multiple activities (e.g. "football and rugby are the most popular sports in England"). American English uses 'sports' for both terms.

Definition[link]

Show Jumping, an equestrian sport

The precise definition of what separates a sport from other leisure activities varies between sources, with no universally agreed definition. The closest to an international agreement on a definition is provided by SportAccord, which is the association for all the largest international sports federations (including association football, american football, cycling, equestrian sports, baseball and more), and is therefore the de facto representative of international sport.

SportAccord uses the following criteria, determining that a sport should:^[1]

• have an element of competition
• be in no way harmful to any living creature
• not rely on equipment provided by a single supplier (excluding proprietary games such as arena football)
• not rely on any 'luck' element specifically designed in to the sport

They also recognise that sport can be primarily physical (such as rugby or athletics), primarily mind (such as chess or go), predominantly motorised (such as Formula 1 or powerboating), primarily co-ordination (such as billiard sports) or primarily animal supported (such as equestrian sport).^[1]

There has been an increase in the application of the term 'sport' to a wider set of non-physical challenges such as electronic sports, especially due to the large scale of participation and organised competition, but these are not widely recognised by mainstream sports organisations.

Competition[link]

There are opposing views on the necessity of competition as a defining element of a sport, with almost all professional sport involving competition, and governing bodies requiring competition as a prerequisite of recognition by the IOC or SportAccord.^[1]

Other bodies advocate widening the definition of sport to include all physical activity. For instance, the Council of Europe include all forms of physical exercise, including those completed just for fun.

In order to widen participation, and reduce the impact of losing on less able participants, there has been an introduction of non-competitive physical activity to traditionally competitive events such as school sports days, although moves like this are often controversial.^[9][10]

History[link]

Roman bronze reduction of Myron's Discobolos, 2nd century AD.

There are artifacts and structures that suggest that the Chinese engaged in sporting activities as early as 2000 BC.^[11] Gymnastics appears to have been a popular sport in China's ancient past. Monuments to the Pharaohs indicate that a number of sports, including swimming and fishing, were well-developed and regulated several thousands of years ago in ancient Egypt.^[12] Other Egyptian sports included javelin throwing, high jump, and wrestling. Ancient Persian sports such as the traditional Iranian martial art of Zourkhaneh had a close connection to the warfare skills.^[13] Among other sports that originate in ancient Persia are polo and jousting.

Motorized sports have appeared since the advent of the modern age

A wide range of sports were already established by the time of Ancient Greece and the military culture and the development of sports in Greece influenced one another considerably. Sports became such a prominent part of their culture that the Greeks created the Olympic Games, which in ancient times were held every four years in a small village in the Peloponnesus called Olympia.^[14]

Sports have been increasingly organised and regulated from the time of the ancient Olympics up to the present century. Industrialisation has brought increased leisure time to the citizens of developed and developing countries, leading to more time for citizens to attend and follow spectator sports, greater participation in athletic activities, and increased accessibility. These trends continued with the advent of mass media and global communication. Professionalism became prevalent, further adding to the increase in sport's popularity, as sports fans began following the exploits of professional athletes through radio, television, and the internet—all while enjoying the exercise and competition associated with amateur participation in sports.

Fair play[link]

Sportsmanship[link]

Sportsmanship is an attitude that strives for fair play, courtesy toward teammates and opponents, ethical behaviour and integrity, and grace in victory or defeat.^[15][16][17]

Sportsmanship expresses an aspiration or ethos that the activity will be enjoyed for its own sake. The well-known sentiment by sports journalist Grantland Rice, that it's “not that you won or lost but how you played the game", and the modern Olympic creed expressed by its founder Pierre de Coubertin: "The most important thing... is not winning but taking part" are typical expressions of this sentiment.

Cheating[link]

Key tenets of sport include that the result should not be predetermined, and that both sides should have equal opportunity to win. Rules are in place to ensure that fair play to occur, but participants can break these rules in order to gain advantage.

Participants may choose to cheat in order to satisfy their desire to win, or in order to achieve an ulterior motive. The widespread existence of gambling on the results of sports fixtures creates the motivation for match fixing, where a participant or participants deliberately work to ensure a given outcome.

Doping and drugs[link]

The competitive nature of sport encourages some participants to attempt to enhance their performance through the use of medicines, or through other means such as increasing the volume of blood in their bodies through artificial means.

All sports recognised by the IOC or SportAccord are required to implement a testing programme, looking for a list of banned drugs, with suspensions or bans being placed on participants who test positive for banned substances.

Violence[link]

Violence in sports involves crossing the line between fair competition and intentional aggressive violence. Athletes, coaches, fans, and parents sometimes unleash violent behaviour on people or property, in misguided shows of loyalty, dominance, anger, or celebration. Rioting or hooliganism are common and ongoing problems at national and international sporting contests.

Participation[link]

Gender participation[link]

This section requires expansion.

Female participation continues to rise alongside the opportunity for involvement and the value of sports for child development and physical fitness. Despite gains during the last three decades, a gap persists in the enrollment figures between male and female players. Female players account for 39% of the total participation in US interscholastic athletics. Gender balance has been accelerating from a 32% increase in 1973–74 to a 63% increase in 1994–95. Hessel (2000)^{[Full citation needed]}.

Youth participation[link]

This section requires expansion.

Youth sports present children with opportunities for fun, socialization, forming peer relationships, physical fitness, and athletic scholarships. Activists for education and the war on drugs encourage youth sports as a means to increase educational participation and to fight the illegal drug trade. According to the Center for Injury Research and Policy at Nationwide Children’s Hospital, the biggest risk for youth sports is death or serious injury including concussion, with the highest risk coming from running, basketball, football, volleyball, soccer, and gymnastics.^[18]

Spectator involvement[link]

Spectators at the 1906 unofficial Olympic Games

The competition element of sport, along with the aesthetic appeal of some sports, result in the popularity of people attending to watch sport being played. This has led to the specific phenomenon of spectator sport.

Both amateur and professional sports attract spectators, both in person at the sport venue, and through broadcast mediums including radio, television and internet broadcast. Both attendance in person and viewing remotely can incur a sometimes substantial charge, such as an entrance ticket, or pay-per-view television broadcast.

It is common for popular sports to attract large broadcast audiences, leading to rival broadcasters bidding large amounts of money for the rights to show certain fixtures. The football World Cup attracts a global television audience of hundreds of millions; the 2006 final alone attracted an estimated worldwide audience of well over 700 million and the 2007 Cricket World Cup attracted about 2.3 Billion worldwide viewers.^{[citation needed]}

In the United States, the championship game of the NFL, the Super Bowl, has become one of the most watched television broadcasts of the year.^{[citation needed]} Super Bowl Sunday is a de facto national holiday in America; the viewership being so great that in 2007 advertising space was reported as being sold at $2.6m for a 30 second slot.^{[citation needed]}

Issues and considerations[link]

Amateur and professional[link]

Modern sports have complex rules and are highly organized.

Sport can be undertaken on an amateur, professional or semi-professional basis, depending on whether particpants are incentivised for participation (usually through payment of a wage or salary).

The popularity of spectator sport as a recreation for non-participants has led to sport becoming a major business in its own right, and this has incentivised a high paying professional sport culture, where high performing participants are rewarded with pay far in excess of average wages, which can run in to millions of dollars.^[19]

Some sports, or individual competitions within a sport, retain a policy of allowing only amateur sport. The Olympic Games started with a principle of amateur competition with those who practiced a sport professionally considered to have an unfair advantage over those who practiced it merely as a hobby.^[20], but following the 1988 games, the IOC decided to make all professional athletes elgible for the Olympics, with only boxing and wrestling still competed on an "amateur" basis, although this revolves around rules, and not payment.

Grassroots sport is a popular phrase which covers the amateur participation in sport at lower levels, normally without pretension towards higher achievement, and is in line with the "sport for all" mentality, where enjoyment is the primary reason for participation.^[21][2]

Technology[link]

Technology plays an important part in modern sport, with it being a necessary part of some sports (such as motorsport), and used in others to improve performance.

Sports science is a widespread academic discipline, and can be applied to areas including athlete performance, such as the use of video analysis to fine tune technique, or to equipment, such as improved running shoes or competitive swimwear.

In order to control the impact of technology on fair play, governing bodies frequently have specific rules designed to control the impact of technical advantage between participants.

Politics[link]

This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (May 2010)

Sports and politics can influence each other greatly.

When apartheid was the official policy in South Africa, many sports people, particularly in rugby union, adopted the conscientious approach that they should not appear in competitive sports there. Some feel this was an effective contribution to the eventual demolition of the policy of apartheid, others feel that it may have prolonged and reinforced its worst effects.^[22]

The 1936 Summer Olympics held in Berlin was an illustration, perhaps best recognised in retrospect, where an ideology was developing which used the event to strengthen its spread through propaganda.

In the history of Ireland, Gaelic sports were connected with cultural nationalism. Until the mid 20th century a person could have been banned from playing Gaelic football, hurling, or other sports administered by the Gaelic Athletic Association (GAA) if she/he played or supported football, or other games seen to be of British origin. Until recently the GAA continued to ban the playing of football and rugby union at Gaelic venues. This ban is still enforced, but was modified to allow football and rugby to be played in Croke Park while Lansdowne Road was redeveloped into Aviva Stadium. Until recently, under Rule 21, the GAA also banned members of the British security forces and members of the RUC from playing Gaelic games, but the advent of the Good Friday Agreement in 1998 led to the eventual removal of the ban.

Nationalism is often evident in the pursuit of sports, or in its reporting: people compete in national teams, or commentators and audiences can adopt a partisan view. On occasion, such tensions can lead to violent confrontation among players or spectators within and beyond the sporting venue, as in the Football War. These trends are seen by many as contrary to the fundamental ethos of sports being carried on for its own sake and for the enjoyment of its participants.

A very famous case when sports and politics colided was the 1972 Olympics in Munich. Masked men entered the hotel of the Israeli olympic team and killed many of their men. This was known as the Munich massacre.

See also[link]

Sports and games portal

Find more about Sports on Wikipedia's sister projects:
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• Outline of sports
• List of sportspeople
• List of sports attendance figures
• List of professional sports leagues

Related topics

References[link]

• European Commission (2007), The White Paper on Sport.
• Council of Europe (2001), The Europien sport charter.

Further reading[link]

• The Meaning of Sports by Michael Mandel (PublicAffairs, ISBN 1-58648-252-1).
• Journal of the Philosophy of Sport

A digital system^[1] is a data technology that uses discrete (discontinuous) values. By contrast, non-digital (or analog) systems represent information using a continuous function. Although digital representations are discrete, the information represented can be either discrete, such as numbers and letters or continuous, such as sounds, images, and other measurements.

The word digital comes from the same source as the word digit and digitus (the Latin word for finger), as fingers are used for discrete counting. It is most commonly used in computing and electronics, especially where real-world information is converted to binary numeric form as in digital audio and digital photography.

Digital noise[link]

When data is transmitted, or indeed handled at all, a certain amount of noise enters into the signal. Noise can have several causes: data transmitted wirelessly, such as by radio, may be received inaccurately, suffer interference from other wireless sources, or pick up background noise from the rest of the universe. Microphones pick up both the intended signal as well as background noise without discriminating between signal and noise, so when audio is encoded digitally, it typically already includes noise.

Electric pulses transmitted via wires are typically attenuated by the resistance of the wire, and changed by its capacitance or inductance. Temperature variations can increase or reduce these effects. While digital transmissions are also degraded, slight variations do not matter since they are ignored when the signal is received. With an analog signal, variances cannot be distinguished from the signal and so provide a kind of distortion. In a digital signal, similar variances will not matter, as any signal close enough to a particular value will be interpreted as that value. Care must be taken to avoid noise and distortion when connecting digital and analog systems, but more when using analog systems.

Symbol to digital conversion[link]

Since symbols (for example, alphanumeric characters) are not continuous, representing symbols digitally is rather simpler than conversion of continuous or analog information to digital. Instead of sampling and quantization as in analog-to-digital conversion, such techniques as polling and encoding are used.

A symbol input device usually consists of a number of switches that are polled at regular intervals to see which switches are pressed. Data will be lost if, within a single polling interval, two switches are pressed, or a switch is pressed, released, and pressed again. This polling can be done by a specialized processor in the device to prevent burdening the main CPU. When a new symbol has been entered, the device typically sends an interrupt to alert the CPU to read it.

For devices with only a few switches (such as the buttons on a joystick), the status of each can be encoded as bits (usually 0 for released and 1 for pressed) in a single word. This is useful when combinations of key presses are meaningful, and is sometimes used for passing the status of modifier keys on a keyboard (such as shift and control). But it does not scale to support more keys than the number of bits in a single byte or word.

Devices with many switches (such as a computer keyboard) usually arrange these switches in a scan matrix, with the individual switches on the intersections of x and y lines. When a switch is pressed, it connects the corresponding x and y lines together. Polling (often called scanning in this case) is done by activating each x line in sequence and detecting which y lines then have a signal, thus which keys are pressed. When the keyboard processor detects that a key has changed state, it sends a signal to the CPU indicating the scan code of the key and its new state. The symbol is then encoded, or converted into a number, based on the status of modifier keys and the desired character encoding.

A custom encoding can be used for a specific application with no loss of data. However, using a standard encoding such as ASCII is problematic if a symbol such as 'ß' needs to be converted but is not in the standard.

Properties of digital information[link]

All digital information possesses common properties that distinguish it from analog communications methods:

• Synchronization: Since digital information is conveyed by the sequence in which symbols are ordered, all digital schemes have some method for determining the beginning of a sequence. In written or spoken human languages synchronization is typically provided by pauses (spaces), capitalization, and punctuation. Machine communications typically use special synchronization sequences.
• Language: All digital communications require a language, which in this context consists of all the information that the sender and receiver of the digital communication must both possess, in advance, in order for the communication to be successful. Languages are generally arbitrary and specify the meaning to be assigned to particular symbol sequences, the allowed range of values, methods to be used for synchronization, etc.
• Errors: Disturbances (noise) in analog communications invariably introduce some, generally small deviation or error between the intended and actual communication. Disturbances in a digital communication do not result in errors unless the disturbance is so large as to result in a symbol being misinterpreted as another symbol or disturb the sequence of symbols. It is therefore generally possible to have an entirely error-free digital communication. Further, techniques such as check codes may be used to detect errors and guarantee error-free communications through redundancy or retransmission. Errors in digital communications can take the form of substitution errors in which a symbol is replaced by another symbol, or insertion/deletion errors in which an extra incorrect symbol is inserted into or deleted from a digital message. Uncorrected errors in digital communications have unpredictable and generally large impact on the information content of the communication.
• Copying: Because of the inevitable presence of noise, making many successive copies of an analog communication is infeasible because each generation increases the noise. Because digital communications are generally error-free, copies of copies can be made indefinitely.
• Granularity: When a continuously variable analog value is represented in digital form there is always a decision as to the number of symbols to be assigned to that value. The number of symbols determines the precision or resolution of the resulting datum. The difference between the actual analog value and the digital representation is known as quantization error. Example: the actual temperature is 23.234456544453 degrees but if only two digits (23) are assigned to this parameter in a particular digital representation (e.g. digital thermometer or table in a printed report) the quantizing error is: 0.234456544453. This property of digital communication is known as granularity.
• Compressible: According to Miller, "Uncompressed digital data is very large, and in its raw form would actually produce a larger signal (therefore be more difficult to transfer) than analog data. However, digital data can be compressed. Compression reduces the amount of bandwidth space needed to send information. Data can be compressed, sent and then decompressed at the site of consumption. This makes it possible to send much more information and result in, for example, digital television signals offering more room on the airwave spectrum for more television channels."^[2]

Historical digital systems[link]

Even though digital signals are generally associated with the binary electronic digital systems used in modern electronics and computing, digital systems are actually ancient, and need not be binary or electronic.

• Written text in books (due to the limited character set and the use of discrete symbols - the alphabet in most cases)
• An abacus was created sometime between 1000 BC and 500 BC , it later become a form of calculation frequency, nowadays it can be used as a very advanced, yet basic digital calculator that uses beads on rows to represent numbers. Beads only have meaning in discrete up and down states, not in analog in-between states.
• A beacon is perhaps the simplest non-electronic digital signal, with just two states (on and off). In particular, smoke signals are one of the oldest examples of a digital signal, where an analog "carrier" (smoke) is modulated with a blanket to generate a digital signal (puffs) that conveys information.
• Morse code uses six digital states—dot, dash, intra-character gap (between each dot or dash), short gap (between each letter), medium gap (between words), and long gap (between sentences)—to send messages via a variety of potential carriers such as electricity or light, for example using an electrical telegraph or a flashing light.
• The Braille system was the first binary format for character encoding, using a six-bit code rendered as dot patterns.
• Flag semaphore uses rods or flags held in particular positions to send messages to the receiver watching them some distance away.
• International maritime signal flags have distinctive markings that represent letters of the alphabet to allow ships to send messages to each other.
• More recently invented, a modem modulates an analog "carrier" signal (such as sound) to encode binary electrical digital information, as a series of binary digital sound pulses. A slightly earlier, surprisingly reliable version of the same concept was to bundle a sequence of audio digital "signal" and "no signal" information (i.e. "sound" and "silence") on magnetic cassette tape for use with early home computers.

See also[link]

References[link]

Look up Channel, channel, or channels in Wiktionary, the free dictionary.

Channel, Channels, and similar terms may refer to:

• Channels (band), a rock band fronted by ex-Jawbox singer/guitarist J. Robbins
• Channels (film), a 2008 film
• Channel, synonym for pre-chorus in popular song structure
• Ion channel, a protein that allows ion flow through a cell membrane
• Mediumship (also known as channelling), communication with spirits
• Meridian (Chinese medicine) (or channel), a concept central to traditional Chinese medical techniques such as acupuncture, and to martial arts such as tai chi and qigong
• Legal channeling, the act of legally making one entity responsible for an event, and thereby dismissing other parties from liability for an event

Places[link]

• Channel (geography), in physical geography, the physical confine of a river, slough or ocean strait consisting of a bed and banks
• Stream channel, a hydrologic scientific term for physical confine of a stream (river) consisting of stream bed and stream banks

Europe[link]

• English Channel, the part of the Atlantic Ocean that separates Great Britain from northern France
• Channel Tunnel, or the Chunnel, a rail tunnel underneath the English Channel linking the U.K. and France
• Channel Islands, an archipelago in the English Channel, off the French coast of Normandy

North America[link]

• Channel Islands of California, a chain of eight islands located in the Pacific Ocean off the coast of Southern California
• Channel-Port aux Basques, Newfoundland and Labrador, Canada
• Channel Lake, Illinois
• Channel, California, a former settlement in Butte County, California, United States
• Channel Home Centers, a defunct home improvement chain based in the northeastern United States

Australia[link]

• Channel Highway, a regional highway in Tasmania, Australia
• Channel Express, a defunct British airline

Business[link]

• Distribution channel, a chain of intermediaries, each passing the product down the chain to the next organization, before it finally reaches the consumer
• Marketing channel, set of activities necessary to transfer the ownership of goods from the point of production to the point of consumption

Technology[link]

• Communication channel, a transmission medium, e.g. a wire, or a multiplexed connection, e.g. a radio channel, used to convey an information signal from a sender to a receiver,
• Channel (digital image), the grayscale representation of a primary color in a digital image
• Channel (programming), in computer science, a tool used for interprocess communication
• Television channel, a television station or its cable/satellite counterpart
• Channel (broadcasting), a range of frequencies assigned by a government for broadcasting
• I/O Channel, in computing, a high-performance input/output (I/O) architecture
• Audio channel

Fiction[link]

• Channeler (The Wheel of Time), fictional characters in the Wheel of Time fantasy book series by Robert Jordan
• Channeling (Rolemaster), in the Rolemaster role-playing game

Sport[link]

• Channel (association football), football (soccer) terminology for particular areas of the pitch
• Channel Football Club, an Australian rules football club in Tasmania

See also[link]

• Canal
• Chanel (disambiguation)

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