Higgledy-Piggledy / music by Maurice Levi; words by Edgar Smith

Cover: photo of woman in hat with two smaller photos of a man; Publisher: xhttps://egrove.olemiss.edu/sharris_b/1052/thumbnail.jp

Strategies for 4-H Program Planning and Recruitment Relative to African American Male Youths

Extension educators often seek new strategies for engaging minority youths in 4-H programs, especially young Black males. These strategies require programming developed in response to the context of this population. We offer insights into the social context of Black males and offer suggestions that will help educators develop identity and integrative site-based programs for this population

Rajah of Broadway

https://digitalcommons.library.umaine.edu/mmb-vp/6388/thumbnail.jp

Game of Love : Duet!

https://digitalcommons.library.umaine.edu/mmb-vp/4367/thumbnail.jp

Sextette

https://digitalcommons.library.umaine.edu/mmb-vp/6343/thumbnail.jp

Optimum take-off angle in the long jump

In this study, we found that the optimum take-off angle for a long jumper may be predicted by combining the equation for the range of a projectile in free flight with the measured relations between take-off speed, take-off height and take-off angle for the athlete. The prediction method was evaluated using video measurements of three experienced male long jumpers who performed maximum-effort jumps over a wide range of take-off angles. To produce low take-off angles the athletes used a long and fast run-up, whereas higher take-off angles were produced using a progressively shorter and slower run-up. For all three athletes, the take-off speed decreased and the take-off height increased as the athlete jumped with a higher take-off angle. The calculated optimum take-off angles were in good agreement with the athletes' competition take-off angles

Reduction in Learning Rates Associated with Anterograde Interference Results from Interactions between Different Timescales in Motor Adaptation

Prior experiences can influence future actions. These experiences can not only drive adaptive changes in motor output, but they can also modulate the rate at which these adaptive changes occur. Here we studied anterograde interference in motor adaptation – the ability of a previously learned motor task (Task A) to reduce the rate of subsequently learning a different (and usually opposite) motor task (Task B). We examined the formation of the motor system's capacity for anterograde interference in the adaptive control of human reaching-arm movements by determining the amount of interference after varying durations of exposure to Task A (13, 41, 112, 230, and 369 trials). We found that the amount of anterograde interference observed in the learning of Task B increased with the duration of Task A. However, this increase did not continue indefinitely; instead, the interference reached asymptote after 15–40 trials of Task A. Interestingly, we found that a recently proposed multi-rate model of motor adaptation, composed of two distinct but interacting adaptive processes, predicts several key features of the interference patterns we observed. Specifically, this computational model (without any free parameters) predicts the initial growth and leveling off of anterograde interference that we describe, as well as the asymptotic amount of interference that we observe experimentally (R2 = 0.91). Understanding the mechanisms underlying anterograde interference in motor adaptation may enable the development of improved training and rehabilitation paradigms that mitigate unwanted interference.Engineering and Applied Science