This article outlines how to construct a film analyzer and digitizer, both of which are used in the study of body mechanics. (DS)

The theory of canonical transformations and its development are discussed with regard to its application to Hutton's principle. Included are the derivation of the equations of motion and a lack of symmetry in the formulaion with respect to Lagrangian and the fundamental commutator relations of quantum mechanics. (Author/SA)

Application of only Dempster's data on problems in human motion studies to living subjects is at best a rough approximation, in light of apparent differences between Dempster's data and the grand mean calculated for all data, with respect to volume and weight. (MB)

Conducted a Rasch analysis of the psychometric qualities of the Test of Infant Motor Performance (TIMP; G. Girolami and S. Campbell, 1994) for the purpose of reducing the length of the test while maintaining its precision as a measurement device. Using scores from 1,732 tests, the TIMP was reduced to 42 items to form a functional motor scale for…

Explains the physical principles of the tuning fork which has a common use in teaching laboratories. Includes information on its vibration, frequency of vibration, elasticity, and reasons for having two prongs. (YDS)

Analysis of lip and jaw motion in 18 stutterers and 10 nonstutterers found that adult stutterers who had been through speech therapy showed significant increases in jaw movement duration and time to peak velocity of the upper lip, lower lip, and jaw. Results suggest that anomalies in stutterers' fluent speech may be the result of acquired…

James J. Gibson (1954) viewed perception as a system that picks up information which supports coordination of the agent's actions with the systems the environment provides. This led him to develop the idea of affordances, characteristics of objects and the environment that support their contributions to interactive activity. (SLD)

Studies the optimum launch angle for maximizing the long jump from a kinematical point of view. (CCM)

Analyzes the motion of a charged point particle started from rest near the center of a charged circular ring. (CCM)

Part of a larger work on the history, philosophy, and utilization of pendulum motion studies, addresses the fate of Christiaan Huygens' 1673 proposal to use the length of a seconds pendulum as a universal, natural, and objective standard of length. (SAH)

Reports part of larger study concerned with understanding learning as it emerges from enacted curriculum. Presents results of two studies on students' discourse about rotation phenomena with particular focus on the consistency of this talk across different phenomena. Concludes that only a minority of students provided adequate observational and…

Motion in a circle troubled Newton and his contemporaries and troubles students today. Presents a clear presentation of certain aspects, particularly centripetal acceleration and centrifugal force. (Author/MM)

The effects of 2 weeks of no, general, and task-related enhanced movement experiences on 8- to 12-week-old infants' (N=30) hand and foot interactions with objects were assessed using standard video and motion analysis. For hand object interaction ability, general and task experience led to greater success than did no experience, and task…

In speech research, it is often desirable to assess quantitatively the variability of a set of speech movement trajectories. This problem is studied here using synthetic trajectories, which consist of a common pattern and terms representing amplitude and phase variability. The results show that a technique for temporal alignment of the records…

Prior studies of time-to-contact (TTC) focused on judgments of unoccluded approaching objects. P. R. DeLucia, M. K. Kaiser, J. M. Bush, L. E. Meyer, and B. T. Sweet (2003) showed that partial occlusion decreases an object's optical size and expansion rate and that the value of tau derived from the reduced optical size (relative rate of accretion;…