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PITCHf/x is a system using three permanently mounted cameras in the stadium to track the speed and location of a pitched baseball from the pitcher's mound to home plate with an accuracy of better than one mile per hour and one inch. With PITCHf/x, statistics such as the pitcher with the fastest fastball, or the pitcher with the sharpest ...
To maximize visibility, the 1st base umpire makes the call for right-handed batters, and the 3rd base umpire for left-handed batters. The umpire makes a "safe" gesture to indicate a checked swing or makes a clenched fist to indicate a full swing. However, if the home plate umpire initially indicates that the swing was not checked, no appeal can ...
In baseball, to lead off, or to take a lead, refers to the position a baserunner takes just prior to a pitch, a short distance away from the base the player occupies. [2] A "lead" can also refer to that distance. [2] A typical lead is six to ten feet (two to three meters) from the base. If the lead is too large, the runner risks being picked off.
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The international definition of fog is a visibility of less than 1 km (3,300 ft); mist is a visibility of between 1 km (0.62 mi) and 2 km (1.2 mi) and haze from 2 km (1.2 mi) to 5 km (3.1 mi). Fog and mist are generally assumed to be composed principally of water droplets, haze and smoke can be of smaller particle size.
Secondary average, or SecA, is a baseball statistic that measures the sum of extra bases gained on hits, walks, and stolen bases (less times caught stealing) depicted per at bat. [1] Created by Bill James , it is a sabermetric measurement of hitting performance that seeks to evaluate the number of bases a player gained independent of batting ...
In a transmissometer the extinction coefficient is determined by measuring direct light transmissivity, and the extinction coefficient is then used to calculate visibility range. [ 2 ] Atmospheric extinction is a wavelength dependent phenomenon, but the most common wavelength in use for transmissometers is 550 nm , which is in the middle of the ...
In geometry, visibility is a mathematical abstraction of the real-life notion of visibility. Given a set of obstacles in the Euclidean space , two points in the space are said to be visible to each other, if the line segment that joins them does not intersect any obstacles.