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Obstacle
An obstacle (also called a barrier, impediment, or stumbling block) is an object, thing, action or situation that causes an obstruction. A obstacle blocks or hinders our way forward. Different types of obstacles include physical, economic, biopsychosocial, cultural, political, technological and military. Types Physical As physical obstacles, we can enumerate all those physical barriers that block the action and prevent the progress or the achievement of a concrete goal. Examples: * architectural barriers that hinder access to people with reduced mobility; * doors, gates, and access control systems, designed to keep intruders or attackers out; * large objects, fallen trees or collapses through passageways, paths, roads, railroads, waterways or airfields, preventing mobility; * sandbanks, rocks or coral reefs, preventing free navigation; * hills, mountains and weather phenomena preventing the free traffic of aircraft; * meteors, meteorites, micrometeorites, cosmic dust, co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horse Jumping Obstacles
Many types of obstacles are found in competitive jumping (horse), horse jumping sports such as show jumping, show hunter, hunter classes, and the Cross-country riding, cross-country phase of eventing. The size and type of obstacles vary depending on the course designer and the expected difficulty level of a particular competition. Horses will need to negotiate many types of obstacles in order to be successful in jumping sports. Fences used in show jumping are often brightly colored and artistically designed, while hunter and eventing fences are generally made to look rustic and natural. Show jumping and hunter obstacles are constructed to fall down if struck by the horse, whereas eventing obstacles have traditionally been solidly built—though to prevent dangerous rotational falls, certain elements are now being designed to break away when hit. Arrowhead Also called chevrons, these fences are shaped like triangles, with the point facing towards the ground. They are generally ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equestrianism
Equestrianism (from Latin , , , 'horseman', 'horse'), commonly known as horse riding ( Commonwealth English) or horseback riding (American English), includes the disciplines of riding, driving, and vaulting. This broad description includes the use of horses for practical working purposes, transportation, recreational activities, artistic or cultural exercises, and competitive sport. Overview of equestrian activities Horses are trained and ridden for practical working purposes, such as in police work or for controlling herd animals on a ranch. They are also used in competitive sports including dressage, endurance riding, eventing, reining, show jumping, tent pegging, vaulting, polo, horse racing, driving, and rodeo (see additional equestrian sports listed later in this article for more examples). Some popular forms of competition are grouped together at horse shows where horses perform in a wide variety of disciplines. Horses (and other equids such as mules ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Athletics (sport)
Athletics is a group of sporting events that involves competitive running, jumping and throwing. The most common types of athletics competitions are track and field, road running, cross country running, cross-country running, and racewalking. The results of racing events are decided by finishing position (or time, where measured), while the jumps and throws are won by the athlete that achieves the highest or furthest measurement from a series of attempts. The simplicity of the competitions, and the lack of a need for expensive equipment, makes athletics one of the most common types of sports in the world. Athletics is mostly an individual sport, with the exception of relay (athletics), relay races and competitions which combine athletes' performances for a team score, such as cross country. Organized athletics are traced back to the ancient Olympic Games from 776 BC. The rules and format of the modern athletics events, events in athletics were defined in Western Europe an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycle Sport
Cycle sport is Competition, competitive physical activity using bicycles. There are several categories of bicycle racing including road bicycle racing, cyclo-cross, mountain bike racing, track cycling, BMX, and cycle speedway. Non-racing cycling sports include artistic cycling, cycle polo, freestyle BMX, mountain bike trials, Hardcourt Bike Polo, hardcourt bike polo and cycleball. The (UCI) is the world Sport governing body, governing body for cycling and international competitive cycling events. The International Human Powered Vehicle Association is the governing body for human-powered vehicles that imposes far fewer restrictions on their design than does the UCI. The UltraMarathon Cycling Association is the governing body for many ultra-distance cycling races. Bicycle racing is recognised as an Olympic sport. Bicycle races are popular all over the world, especially in Europe. The countries most devoted to bicycle racing include Belgium, Denmark, France, Germany, Italy, the N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigation
Navigation is a field of study that focuses on the process of monitoring and controlling the motion, movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, marine navigation, air navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's Position (geometry), position compared to known locations or patterns. Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and Relative direction, direction. In this sense, navigation includes orienteering and pedestrian navigation. For marine navigation, this involves the safe movement of ships, boats and other nautical craft either on or underneath the water using positions from navigation equipment with appropriate nautical char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet
A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or Coma (cometary), coma surrounding the nucleus, and sometimes a Comet tail, tail of gas and dust gas blown out from the coma. These phenomena are due to the effects of solar radiation and the outstreaming solar wind plasma acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. The coma may be up to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit. If sufficiently close and bright, a comet may be seen from Earth without the aid of a telescope and can Subtended angle, subtend an arc of up to 30° (60 Moons) across the sky. Comets have been observed and recorded since ancient times by many cultures and religion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coral Reef
A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and jellyfish. Unlike sea anemones, corals secrete hard carbonate exoskeletons that support and protect the coral. Most reefs grow best in warm, shallow, clear, sunny and agitated water. Coral reefs first appeared 485 million years ago, at the dawn of the Early Ordovician, displacing the microbial and sponge reefs of the Cambrian. Sometimes called ''rainforests of the sea'', shallow coral reefs form some of Earth's most diverse ecosystems. They occupy less than 0.1% of the world's ocean area, about half the area of France, yet they provide a home for at least 25% of all marine species, including fish, mollusks, worms, crustaceans, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic Cup Shannon Mejnert Sandy1
Baltic may refer to: Peoples and languages *Baltic languages, a subfamily of Indo-European languages, including Lithuanian, Latvian and extinct Old Prussian *Balts (or Baltic peoples), ethnic groups speaking the Baltic languages and/or originating from the Baltic countries *Baltic Germans, historical ethnic German minority in Latvia and Estonia *Baltic Finnic peoples, the Finnic peoples historically inhabiting the area on the northeastern side of the Baltic sea Places Northern Europe * Baltic Sea, in Europe * Baltic region, an ambiguous term referring to the general area surrounding the Baltic Sea * Baltic states (also Baltic countries, Baltic nations, Baltics), a geopolitical term, currently referring to Estonia, Latvia and Lithuania * Baltic Provinces or governorates, former parts of the Swedish Empire and then Russian Empire (in modern Latvia, Estonia) * Baltic Shield, the exposed Precambrian northwest segment of the East European Craton * Baltic Plate, an ancient tectonic p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Jump
The high jump is a track and field event in which competitors must jump unaided over a horizontal bar placed at measured heights without dislodging it. In its modern, most-practiced format, a bar is placed between two standards with a crash mat for landing. Since ancient times, competitors have successively improved their technique until developing the universally preferred Fosbury Flop, in which athletes run towards the bar and leap head first with their back to the bar. The discipline is, alongside the pole vault, one of two vertical clearance events in the Athletics at the Summer Olympics, Olympic athletics program. It is contested at the World Championships in Athletics and the World Athletics Indoor Championships, and is a common occurrence at track and field meets. The high jump was among the first events deemed acceptable for women, having been held at the Athletics at the 1928 Summer Olympics, 1928 Olympic Games. Javier Sotomayor (Cuba) is the world record holder with a j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pole Vault
Pole vaulting, also known as pole jumping, is a track and field event in which an athlete uses a long and flexible pole, usually made from fiberglass or carbon fiber, as an aid to jump over a #bar, bar. Pole jumping was already practiced by the Ancient Egypt, ancient Egyptians, Ancient Greece, ancient Greeks and the Gaelic Ireland, ancient Irish people, although modern pole vaulting, an athletic contest where height is measured, was first established by the German teacher Johann Christoph Friedrich GutsMuths in the 1790s. It has been a full medal event at the Olympic Games since Athletics at the 1896 Summer Olympics, 1896 for men and since 2000 Summer Olympics, 2000 for women. It is typically classified as one of the four major jumping events in Sport of athletics, athletics, alongside the high jump, long jump and triple jump. It is unusual among track and field sports in that it requires a significant amount of specialised equipment in order to participate, even at a basic leve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravitational Field
In physics, a gravitational field or gravitational acceleration field is a vector field used to explain the influences that a body extends into the space around itself. A gravitational field is used to explain gravitational phenomena, such as the '' gravitational force field'' exerted on another massive body. It has dimension of acceleration (L/T2) and it is measured in units of newtons per kilogram (N/kg) or, equivalently, in meters per second squared (m/s2). In its original concept, gravity was a force between point masses. Following Isaac Newton, Pierre-Simon Laplace attempted to model gravity as some kind of radiation field or fluid, and since the 19th century, explanations for gravity in classical mechanics have usually been taught in terms of a field model, rather than a point attraction. It results from the spatial gradient of the gravitational potential field. In general relativity, rather than two particles attracting each other, the particles distort spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
