Tackle (football move) boots. Referees are encouraged to at the very least caution (yellow card) players who commit such challenges. Additionally, an illegal tackle which is also a professional foul is considered misconduct. The most spectacular form of tackle in association football is the slide tackle, wherein a tackler slides, leg extended, along the ground, aiming to hit the ball away. This form of tackle carries a high risk of committing a foul. "Diving" is association football involves tackled players exaggerating the physicality of tackles, so as to gain favourable decisions from the referee. In Australian rules football, the move commonly described as
Gain scheduling variables. A relatively large scope state of the art about gain scheduling has been published in (Survey of Gain-Scheduling Analysis & Design, D.J.Leith, WE.Leithead). Gain scheduling In control theory, gain scheduling is an approach to control of non-linear systems that uses a family of linear controllers, each of which provides satisfactory control for a different operating point of the system. One or more observable variables, called the "scheduling variables", are used to determine what operating region the system is currently in and to enable the appropriate linear controller. For example, in an aircraft flight control system, the altitude and Mach