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Four-seam Fastball
A four-seam fastball, also called a rising fastball, a four-seamer, or a cross-seam fastball, is a pitch in baseball. It is a member of the fastball family of pitches and is usually the hardest (i.e., fastest) ball thrown by a pitcher. It is called what it is because with every rotation of the ball as it is thrown, four seams come into view. A few pitchers at the major league level can sometimes reach a pitch speed of up to 100 mph. It is often compared with the two-seam fastball. Grip and action The four-seam fastball is designed purely for velocity; it travels to the batter's box with little or no "break" from straight-line flight—the intent being to challenge the batter's reaction time instead of fooling him with a pitch that breaks downward or to one side or the other. The ball is gripped with the index and middle fingers set on or across a line (cross-seam) of the "horseshoe" seam that faces outward, i.e., away from the pitcher's body. The thumb is placed directl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
20070616 Chris Young Visits Wrigley (4)-edit3
7 (seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube (algebra), cube. As an early prime number in the series of positive integers, the number seven has greatly symbolic associations in religion, mythology, superstition and philosophy. The seven Classical planets resulted in seven being the number of days in a week. It is often considered lucky in Western culture and is often seen as Symbolism of the Number 7, highly symbolic. Unlike Western culture, in Vietnamese culture, the number seven is sometimes considered unlucky. It is the first natural number whose pronunciation contains more than one syllable. Evolution of the Arabic digit In the Brahmi numerals, beginning, Indians wrote 7 more or less in one stroke as a curve that looks like an uppercase vertically inverted. The western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the digit m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pitch (baseball)
In baseball, the pitch is the act of throwing the baseball toward home plate to start a play. The term comes from the Knickerbocker Rules. Originally, the ball had to be thrown underhand, much like "pitching in horseshoes". Overhand pitching was not allowed in baseball until 1884. The biomechanics of pitching have been studied extensively. The phases of pitching include the windup, early cocking, late cocking, early acceleration, late acceleration, deceleration, and follow-through. Pitchers throw a variety of pitches, each of which has a slightly different velocity, trajectory, movement, hand position, wrist position and/or arm angle. These variations are introduced to confuse the batter and ultimately aid the defensive team in getting the batter or baserunners out. To obtain variety, and therefore enhance defensive baseball strategy, the pitcher manipulates the grip on the ball at the point of release. Variations in the grip cause the seams to catch the air differently, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baseball
Baseball is a bat-and-ball sport played between two teams of nine players each, taking turns batting and fielding. The game occurs over the course of several plays, with each play generally beginning when a player on the fielding team, called the pitcher, throws a ball that a player on the batting team, called the batter, tries to hit with a bat. The objective of the offensive team (batting team) is to hit the ball into the field of play, away from the other team's players, allowing its players to run the bases, having them advance counter-clockwise around four bases to score what are called " runs". The objective of the defensive team (referred to as the fielding team) is to prevent batters from becoming runners, and to prevent runners' advance around the bases. A run is scored when a runner legally advances around the bases in order and touches home plate (the place where the player started as a batter). The principal objective of the batting team is to hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fastball
The fastball is the most common type of pitch thrown by pitchers in baseball and softball. " Power pitchers," such as former American major leaguers Nolan Ryan and Roger Clemens, rely on speed to prevent the ball from being hit, and have thrown fastballs at speeds of (officially) and up to (unofficially). Pitchers who throw more slowly can put movement on the ball, or throw it on the outside of home plate where batters can't easily reach it. Fastballs are usually thrown with backspin, so that the Magnus effect creates an upward force on the ball. This causes it to fall less rapidly than expected, and sometimes causes an optical illusion often called a rising fastball. Although it is impossible for a human to throw a baseball fast enough and with enough backspin for the ball to actually rise, to the batter the pitch seems to rise due to the unexpected lack of natural drop on the pitch. A straight pitch is achieved by gripping the ball with the fingers across the wide par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two-seam Fastball
A two-seam fastball is a pitch in baseball and softball. It is a variant of the straight fastball. The pitch has the speed of a fastball and can also include late-breaking action caused by varying the pressure of the index and middle fingers on the ball. Grip and action Several grips are used for a two-seam fastball, the most common of which is to place the index and middle fingers along the seams where they are closest together (where the horseshoes point in towards each other) with the thumb placed directly below on the leather with the rear of the thumb just touching the bottom near seam. The arm action is identical to a four-seam fastball, although the hand action differs slightly. Typically, the two-seam has more movement if the pitcher applies index fingertip pressure, or holds the baseball deeper in the hand. Both techniques cause the ball to spin out of the hand off-center and away from the pitcher, similar to the spin of a changeup. The two-seam fastball often is percei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnus Effect
The Magnus effect is an observable phenomenon commonly associated with a spinning object moving through a fluid. The path of the spinning object is deflected in a manner not present when the object is not spinning. The deflection can be explained by the difference in pressure of the fluid on opposite sides of the spinning object. The Magnus effect is dependent on the speed of rotation. The most readily observable case of the Magnus effect is when a spinning sphere (or cylinder) curves away from the arc it would follow if it were not spinning. It is often used by association football and volleyball players, baseball pitchers, and cricket bowlers. Consequently, the phenomenon is important in the study of the physics of many ball sports. It is also an important factor in the study of the effects of spinning on guided missiles—and has some engineering uses, for instance in the design of rotor ships and Flettner aeroplanes. Topspin in ball games is defined as spin about a ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tableau
Tableau (French for 'little table' literally, also used to mean 'picture'; tableaux or, rarely, tableaus) may refer to: Arts * ''Tableau'', a series of four paintings by Piet Mondrian titled '' Tableau I'' through to ''Tableau IV'' * ''Tableau vivant'', a motionless performance evoking a painting or sculpture; or a painting or photograph evoking such a theatrical scene * Scene (drama), in opera, ballet, and some other dramatic forms Games * Tableau (card game), a specific patience card game * Tableau (cards), the layout in patience and fishing card games * Tableau (dominoes), the layout in dominoes Other * Tableau, another term for a table of data, particularly: ** Cryptographic tableau, or tabula recta, used in manual cipher systems ** Division tableau, a table used to do long division * Method of analytic tableaux (also semantic tableau or truth tree), a technique of automated theorem proving in logic * Tableau Software, a company providing tools for data visualization and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flicker Fusion Threshold
The flicker fusion threshold, critical flicker frequency (CFF) or flicker fusion rate, is a concept in the psychophysics of vision. It is defined as the frequency at which an intermittent light stimulus appears to be completely steady to the average human observer. A traditional term for flicker fusion is " persistence of vision", but this has also been used to describe positive afterimages or motion blur. Although flicker can be detected for many waveforms representing time-variant fluctuations of intensity, it is conventionally, and most easily, studied in terms of sinusoidal modulation of intensity. There are seven parameters that determine the ability to detect the flicker: # the frequency of the modulation; # the amplitude or depth of the modulation (i.e., what is the maximum percent decrease in the illumination intensity from its peak value); # the average (or maximum—these can be inter-converted if modulation depth is known) illumination intensity; # the wavelength (or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trevor Bauer
Trevor Andrew Bauer (born January 17, 1991) is an American professional baseball pitcher for the Los Angeles Dodgers of Major League Baseball (MLB). He previously played for the Arizona Diamondbacks, Cleveland Indians, and Cincinnati Reds. After starring as a pitcher for three seasons at William S. Hart High School, Bauer graduated a year early and enrolled at the University of California, Los Angeles. He and fellow ace Gerrit Cole helped take UCLA to a 22-game winning streak and a College World Series appearance as sophomores in 2010. The following year, Bauer won both the Golden Spikes Award and the National Pitcher of the Year Award. The Diamondbacks selected him third overall at the 2011 MLB Draft. Bauer made his major league debut the following June, becoming the first member of his draft class to reach the majors. Bauer clashed with his Diamondbacks teammates during the 2012 season. In December 2012, he was traded to the Cleveland Indians. He spent the first two season ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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