"Celebrate" can play nice arc

Loughborough University's sports physicist Dr Andy Harland is responsible for the Adidas World Cup in South Africa, the official game ball "Jabulani" a series of independent tests, he said that the high altitude areas in the flight path will be different, this an English football manufacturing experts further explained,: "The players need to adapt to this ball, such as ball speed at high altitudes near sea level in Johannesburg and Cape Town than would have to come fast, basically speaking, experimental proof, Renhe ball 1700 meters in height the ball is usually pull at least 5% faster. " Harland that those not familiar with the game ball fly faster rhythm keeper, apparently in response to the lack of adequate training in the frequency of exercise. Participation " women adidas " design work, said Hans-Peter Nürnberg decision footwork fancy ball trajectory! "We have seen some outstanding athletes, such as Lionel Messi, David Beckham is in superb foot law is known, because of their unique foot law, we can see the ball at their feet to kick it wonderful flight arc. "When asked," the impact of high altitude on the ball when ", Hans-Peter Nürnberg, said:" We can not create different for different altitudes of football, so I think this is the World Cup Travel special geographical environment, which are each team must adapt to and to know. "FIFA's official test in fact a series of rigorous tests, including content, including the circumference of the ball, water absorption, weight, shape , the ball can remain in the race and the pressure loss original circular. Will be attached below on this official ball "Jabulani" the test report and the FIFA standards. Is honored, "Jabulani" test result data are superior to FIFA's standards! Interview: Loughborough University's sports physicist Dr Andy Harland Q: Since "Jabulani" fully in line with FIFA standards, why some of the goalkeeper or some complain? A: Many different ball past the goalkeeper, said this of their training or competition in contact with the ball, especially in the high altitude environment, the ball so quickly, especially when the ball will fly in front of you, the goalkeeper will feel the ball faster, so the goalkeeper is the result of feedback from the ball than in the past this different. Because of the high altitude environment to be fair before the interview: Adidas Innovation Team Hans-Peter Nürnberg Q: Players can freely grasp of the operational features of this ball? A: We have see some good Players such as Messi, Beckham and Ronaldo are all in superb foot law known method determines their feet they can kick very beautiful arc, I think the characteristics of this ball can encourage good Players kick the curve ball, because they can "Jabulani" any curve they want. Interview: Loughborough University's sports physicist Dr Andy Harland Q: Many top players, said foot method is different from running the ball way, both different, so of you? A: It is now the ability to control the ball players have a lot of upgrade, we could feel this ball, if not feet Plus the Extra Xuanzhuan law, I really am Yuan. But the Massachusetts Institute of Technology, Dr. Kim Blair aerodynamic home once said football is not in motion the process of a pure round, basically like a flying wing-like objects as spherical air during the flight will influence, shape will produce changes. Q: This ball for different altitudes in South Africa and how climatic conditions will have a different kind of performance? A: We are in South Africa have different climatic conditions, different weather conditions, in addition to the different altitude, particularly in the high altitude of sea level compared to the performance of the ball will be different, but all we can not change, we can not change the ball's design or high-altitude and low altitude areas and to design a ball, so I think For each team, they all know some things before the competition is to adapt, and this fair to everyone. sphere circumference test: the consistency of the sphere circumference is one of football's major properties. A perfect circle the same ball can make the players better and control the soccer ball extraordinary run. To calculate the average soccer ball circumference, each Adidas game ball through 10 different test points to measure the sphere sphere circumference. The following are test results: FIFA approved the eligibility criteria: 68.5 cm - 69.5 cm Adidas "jordan 2010 ": 69.0 cm (+ / - 0.2 cm) round ball endurance test: have a perfect round ball football soccer can help football players display their exquisite artistry. The more close to perfectly round ball, football performance in flight more stable, higher accuracy, predict the flight football the stronger sex. "JABULANI" only by the eight composed of epidermis, the new three-dimensional surface can play a better transfer of power and to reduce those formed after the flight football point of view the target area, while the sphere surface area of a single block of the increase will provide players more impact point. Adidas ball through 16 different points to measure the diameter of football, and calculate the average diameter of football. FIFA soccer ball diameter and the difference between the minimum diameter with strict rules. The following are test results: FIFA approved the eligibility criteria: the maximum difference less than 1.5% Adidas "JABULANI": the maximum difference less than 1.0% water absorption test: the extent of wet and dry ball surface will affect the performance of football. One is wet football, and the flight speed and bounce height will be reduced, kicked out of the difficulty of rotating the ball will improve.阿迪达斯特 some thermal bonding technology enables high efficiency of the waterproof Adidas football performance, on the Adidas "JABULANI" The test results show that in dry and wet environment, the performance of exactly the same. Water absorption test in football, soccer squeeze into a water container and rotate 250 times, followed by weighing the weight of football. The container of water will also be in the water absorption test before and after weighing. FIFA approved the eligibility criteria: the sphere of not more than 10% weight gain Adidas "JABULANI": 0 increase the weight of the weight of the sphere test: usually every game needs more football, and for every football game are required to have the same performance, so the weight of the consistency of football essential. If the football weight is too light or too heavy, the angle of flight of the football and route will be difficult to predict. FIFA approved the eligibility criteria: weight between 420-445 grams Soccer Adidas "JABULANI": Football Weight 440 grams (+ / - 2 g) ball shape and size of the retention test: a soccer ball in a game played 2000 times on average to be around, and we need the performance of football from the start of the race's first minute to the last minute are consistent. To test the soccer ball on its own shape and size retention, FIFA approved standard requires a qualified football to 50 km per hour hit a steel plate 2,000 times, after the test, the ball pressure and the ball arcs only allows for very minor changes, and the spherical ball valve damage the stitching does not appear to be used for soccer games. The following test results: FIFA approved the eligibility criteria: 50 km per hour hit 2,000 Adidas "JABULANI": 50 km per hour crash test 3500 drum: drum test is for the Adidas Adidas innovation team Football special printing quality and durability of the surface of specialized testing. And the 2006 World Cup ball "+ Team Star" as Adidas "JABULANI" also with fully embedded in printing technology make football, the technology so that it has the best durability of the surface material, thus ensuring sphere pattern appearance. Rebound performance test: the use of the chest, thighs and feet and other parts to control the football or extraordinary times, very good football players need to be able to predict and control the rebound performance of football. In this unique test, from 2 meters high and several football down to a plate, soccer rebound from the ground between the maximum and minimum height difference can not exceed 10 cm. FIFA approved the eligibility criteria: no more than 10 cm Adidas "JABULANI": in 20 degree ambient temperature under test is 143 cm high bounce ball pressure test: If the soccer ball pressure change during the game, players will difficult to predict the direction of the football and run track, but football can not meet the requirements of the same rebound effect. In the test, after being fully inflated football aside, after three days and then measured the ball pressure. FIFA, soccer ball drop in pressure can not exceed a specific percentage of the ball pressure. FIFA approved the eligibility criteria: ball pressure drop of not more than 20% of the Adidas "JABULANI": ball pressure decreased less than 10%