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Jones Counter
The Jones Counter is a device fitted to the front wheel of a bicycle that counts the revolutions of the wheel. It was invented in 1971 by Alan Jones in order to measure the length of road running race courses. The counter has gears that drive a mechanical digital counter. One count typically corresponds to about 1/20 of a wheel revolution (this varies if a different gear ratio is used); this provides a resolution of about 10 cm in course length, although overall accuracy, depending on calibration and other factors, is lower, but normally better than 1 part in 1,000. Almost all road running courses in the world are measured with this device. The Jones Counter has been used to measure all Olympic Marathon courses since the 1976 Montreal Olympics except for the 1980 Moscow Olympics. In addition, it has often been used to measure the Olympic Road Race Courses. Models Clain Jones Counter On the right is the original production version, manufactured by Alan Jones's son Clain from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Running
Road running is the sport of running on a measured course over an established road. This differs from track and field on a regular track and cross country running over natural terrain. These events are usually classified as long-distance according to athletics terminology, with races typically ranging from 5 kilometers to 42.2 kilometers in the marathon. They may involve large numbers of runners or wheelchair entrants. The four most common IAAF recognized distances for road running events are 5K runs, 10K runs, half marathons and marathons. Running on the road is an alternative surface to running on a trail, track, or treadmill. For many people looking to participate in running as an activity or sport, there are multiple opportunities that can be found on the road. Road running is one of several forms of road racing, which also includes road bicycle racing and motor vehicle road racing. IAAF The international governing body for road racing is the IAAF. The IAAF aims t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jones Counter 1975
Jones may refer to: People *Jones (surname), a common Welsh and English surname *List of people with surname Jones *Jones (singer), a British singer-songwriter Arts and entertainment * Jones (''Animal Farm''), a human character in George Orwell's novel ''Animal Farm'' * "Jones" (''Law & Order: Criminal Intent''), an episode of the TV series *Jones!, a New Zealand television channel *"Jones", a song from the album ''Certain Things Are Likely'' by Kissing the Pink Organisations *Jones Bootmaker, a UK-based footwear retailer *Jones Soda, a brand of soda pop *Jones Sewing Machine Company, a British manufacturer acquired by Brother Industries *L&F Jones, a British retail and hotel company Places *Jones, Ontario, Canada *Jones, Isabela, Philippines United States *Jones, Alabama *Jones, Illinois *Jones, Kentucky *Jones, Michigan *Jones, Oklahoma *Jones, West Virginia *Jones Township (other) Science and technology *Jones (Martian crater), an impact crater on Mars *Jones (unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York Road Runners
New York Road Runners (NYRR) is a non-profit running organization based in New York City whose mission is to help and inspire people through running. It was founded in 1958 by Ted Corbitt with 47 members and has since grown to a membership of more than 60,000. As of 2012, it was considered to be the premiere running organization in the United States. History Following his establishment of the Road Runners Club of America in 1957, Ted Corbitt became the founding president of New York Road Runners in 1958. Fred Lebow, founder of the New York City Marathon, succeeded him and served as president from 1972-1993. Under Lebow's tenure, two other signature races (the Fifth Avenue Mile and Women's Mini) were established. Allan Steinfeld succeeded Lebow and was named technical director of the New York City Marathon, which he was credited with modernizing, in 1981. In 2005, Mary Wittenberg succeeded Steinfeld as president and CEO of NYRR. She also became the first female director of the New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Veeder-Root Counter
Mechanical counters are digital counters built using mechanical components. Long before electronics became common, mechanical devices were used to count events. They typically consist of a series of disks mounted on an axle, with the digits zero through nine marked on their edge. The right most disk moves one increment with each event. Each disk except the left-most has a protrusion that, after the completion of one revolution, moves the next disk to the left one increment. Such counters were used as odometers for bicycles and cars and in tape recorders and fuel dispensers and to control manufacturing processes. One of the largest manufacturers was the Veeder-Root company, and their name was often used for this type of counter.. Mechanical counters can be made into electromechanical counters, that count electrical impulses, by adding a small solenoid. History An odometer for measuring distance was first described by Vitruvius around 27 and 23 BC, although the actual inventor may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Marathon
The London Marathon is an annual marathon held in London, United Kingdom, and is the 2nd largest annual road race in the UK, after the Great North Run in Newcastle. Founded by athletes Chris Brasher and John Disley in 1981, it is typically held in April but has moved to October for 2020 and 2021 due to the COVID-19 pandemic. The 2022 edition was also postponed to October with Hugh Brasher stating "We believe that by moving the 2022 event to October we give ourselves the best chances of welcoming the world to the streets of London, enabling tens of millions to be raised for good causes and giving people the certainty that their hard work and training will allow them to experience the amazing crowds cheering them every step of the way from Greenwich to Westminster". The largely flat course is set around the River Thames, starting in Blackheath and finishing at The Mall. Hugh Brasher (son of Chris) is the current Race Director and Nick Bitel its Chief Executive. The race has severa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Veeder-Root Counter
Mechanical counters are digital counters built using mechanical components. Long before electronics became common, mechanical devices were used to count events. They typically consist of a series of disks mounted on an axle, with the digits zero through nine marked on their edge. The right most disk moves one increment with each event. Each disk except the left-most has a protrusion that, after the completion of one revolution, moves the next disk to the left one increment. Such counters were used as odometers for bicycles and cars and in tape recorders and fuel dispensers and to control manufacturing processes. One of the largest manufacturers was the Veeder-Root company, and their name was often used for this type of counter.. Mechanical counters can be made into electromechanical counters, that count electrical impulses, by adding a small solenoid. History An odometer for measuring distance was first described by Vitruvius around 27 and 23 BC, although the actual inventor may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Short Course Prevention Factor
The short course prevention factor (SCPF) is a multiplicative factor or coefficient used in the sport of athletics, specifically road running, to ensure that the measured length of a course is at least as long as the desired length of the course. World Athletics, the international governing body for athletics, as well as USA Track & Field, the national governing body for the United States, specify the numerical factor of the SCPF to be 1.001. The SCPF has important implications when verifying world record performances. However, just because the SCPF has been added to the measurement calculation, that does not mean that a 10k course is 10,010 meters in length. The SCPF is designed to make sure that, in spite of wobble of the bicycle used for measuring, or small curves to avoid potholes or other obstructions, the course will still be at least as long as the advertised distance. All certified 10k courses should be longer than 10,000 meters, but will normally be less than 10,010 meter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IAAF
World Athletics, formerly known as the International Amateur Athletic Federation (from 1912 to 2001) and International Association of Athletics Federations (from 2001 to 2019, both abbreviated as the IAAF) is the international governing body for the sport of athletics, covering track and field, cross country running, road running, race walking, mountain running, and ultra running. Included in its charge are the standardization of rules and regulations for the sports, certification of athletic facilities, recognition and management of world records, and the organisation and sanctioning of athletics competitions, including the World Athletics Championships. The organisation's president is Sebastian Coe of the United Kingdom, who was elected in 2015 and re-elected unopposed in 2019 for a further four years. World Athletics suspended the Russian Athletics Federation (RusAF) from World Athletics starting in 2015, for eight years, due to doping violations, making it ineligible to hos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Counting Instruments
Counting is the process of determining the number of elements of a finite set of objects, i.e., determining the size of a set. The traditional way of counting consists of continually increasing a (mental or spoken) counter by a unit for every element of the set, in some order, while marking (or displacing) those elements to avoid visiting the same element more than once, until no unmarked elements are left; if the counter was set to one after the first object, the value after visiting the final object gives the desired number of elements. The related term ''enumeration'' refers to uniquely identifying the elements of a finite (combinatorial) set or infinite set by assigning a number to each element. Counting sometimes involves numbers other than one; for example, when counting money, counting out change, "counting by twos" (2, 4, 6, 8, 10, 12, ...), or "counting by fives" (5, 10, 15, 20, 25, ...). There is archaeological evidence suggesting that humans have been counti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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