Dit Dah Learn

Advances in Motor Learning and Control surveys the latest, most important advances in the field, surpassing the confines of debate between proponents of the information processing and dynamical systems. Zelaznik, editor of the Journal of Motor Behavior from 1989 to 1996, brings together a variety of perspectives. Some of the more difficult topics-such as behavioral analysis of trajectory formation and the dynamic pattern perspective of rhythmic movement-are presented in tutorial fashion. Other chapters provide a foundation for understanding increasingly specialized areas of study.

Fundamentals of sonar systems are presented in this book, prepared for both regular navy and naval reserve personnel who are seeking advancement in rating. An introductory description is first made of submarines and antisubmarine units. Determination of underwater targets is analyzed from the background of true and relative bearings, true and relative motion, and computation of target angles. Then, applications of both active and passive sonars are explained in connection with bathythermographs, fathometers, tape recorders, fire control techniques, internal and external communications systems, maintenance actions, test methods and equipment, and safety precautions. Basic principles of sound and temperature effects on wave propagation are also discussed. Illustrations for explanation use, information on training films and the sonar technician rating structure are also provided.

Lists all the resources needed to create a balanced curriculum for homeschooling--from preschool to high school level.

Boys' Life is the official youth magazine for the Boy Scouts of America. Published since 1911, it contains a proven mix of news, nature, sports, history, fiction, science, comics, and Scouting.