The above description is the basic idea of what is going on with the Yagi-Uda antenna. Yagi antenna design is done most often via measurements, and sometimes computer simulations. For instance, let's look at a two-element Yagi antenna (1 reflector, 1 feed element, 0 directors).
Though there are no detailed records of when the sport of track and field began, experts say that track and field history can be traced back to 776 B.C. Track and Field History Experts say that track and field history can be traced back to 776 B.C when a cook named Koroibos, from Elis, won a race that was run over 600 feet distance. It is believed that this was the only athletic event for the initial 13 Olympic Games.
The 5000 m has been present on the Olympic programme since 1912 for men and since 1996 for women. Prior to 1996, women had competed in an Olympic 3000 metres race since 1984.The 5000 m is a standard international championship racing distance and has been held at the World Championships in Athletics since its first edition in 1983.The event is almost the same length as the dolichos race held at the Ancient Olympic Games, introduced in 720 BCE.he 5000 m is a standard international championship racing distance and has been held at the World Championships in Athletics since its first edition in 1983. The event is almost the same length as the dolichos race held at the Ancient Olympic Games, introduced in 720 BCE.