Project (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Includes bibliographical references (leaves 31-32). Also available via the Internet.

Thesis (Ph. D.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographical references (p. [92-101]).

The purpose of this study was to determine the better predictors of ball velocity and identify differences in the overarm throw of male and female athletes. A three dimensional videographic analysis was performed to analyze the angular and linear velocities of various body segments, the time between maximum velocity of the body segment and ball release, stride length, height of release, and angle of trajectory. Eight male baseball players and six female softball players volunteered to be videotaped. A one way ANOV A with ball velocity as the dependent variable revealed a significant difference between genders (f (1, 11) = 5.3, ll < .0413). A forward stepwise multiple regression analysis allowed selection from all of the angular velocity variables and the kinematic variables regressed on the dependent variable of ball velocity. This identified the main contributors to ball velocity. For the male athletes three variables were selected into the multiple regression equation, (a) the angular velocity of the forearm at ball release, (b) the time between maximum angular velocity of the pelvis and ball release,and (c) the angular velocity of the pelvis at ball release. For the female athletes the multiple regression equation yielded one variable, the angular velocity of the forearm at ball release to predict ball velocity. Gender differences existed in the sequential timing of the pelvis, trunk, and upper extremity. The female athletes reached maximum pelvic velocity earlier with peak trunk velocity occurring later than the males. The sequential timing differences may have played a role in the explanation of why the female throwers lacked transfer of momentum from the lower extremity to the upper. The results of an unpaired two-tailed t-test on the two best throwers in each group revealed differences in ball velocity, maximum linear velocity of the hip, and maximum linear velocity of the trunk.

No description available.

Thesis (M.S.)--Marquette University, 2009. / John P. Borg, Jon Koch, Philip A. Voglewede, Advisors.

Thesis (M.S.)--University of Wisconsin--Madison, 1965. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 45.

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains viii, 138 p. : ill. (some col.). Includes abstract. Includes bibliographical references.

The purpose of the study was to compare fast ball and curve ball pitching performances in terms of selected biomechanical components of upper limb motion in college baseball pitchers.

Dynamic stall characteristics of an NACA-0012 airfoil were investigated to assess the possibility of augmented lift during sinusoidal angle of attack motion. Tests were conducted over a range of Reynolds numbers from 2.0x10^5 to 5.0x10^5 and reduced frequencies from 0.02 to 0.3. The data were recorded and plotted in a series of lift coefficient vs. angle of attack diagrams. These diagrams exhibited a hysteresis curve for the dynamic stall cycle similar to the results of previous investigators but without a large peak at high angles of attack. The data were also plotted with lift coefficient vs. angular cycle position. The average lift coefficient was computed for each set of test conditions and plotted with average lift coefficient vs. reduced frequency for each value of Reynolds number. The summary data indicate an increase of average lift coefficient with reduced frequency, and increased Reynolds number, althought the increase was not monotonic.

Throughout history man has had the need of services which require great skill or tremendous strength or delicate consistency on the part of those who perform. Much of the time he has turned to the machine to accomplish these requirements.