Discusses research that indicates that nerve membranes, which play a key role in the conduction of impulses, are traversed by protein channels with ion pathways opened and closed by the membrane electric field. (Author/MLH)

A series of three computer-generated films intended to serve as teaching aids in presenting ideas concerning the motion of electrons in periodic potential. (DF)

Discussion of the shortcomings of textbook explanations of surface tension, distinguishing between concepts of tension and capillary rise. The arguments require only a clear understanding of Newtonian mechanics, notably potential energy. (DF)

Views as important the relating of abstract ideas of modern mathematics now being taught in the schools to situations encountered in the sciences. Describes use of matrices and Markov chains to study first-order processes. (Author/DF)

Discussion allows students to work through the key research in a field, thus enabling them to understand concepts as working tools rather than mere abstractions. (Author)

Students can be taught to appreciate the wealth of information that can be efficiently presented in a mathematical formula, and get a glimpse at a simplifying approximation plus a mathematical use of symmetry. (DF)

Maintains the concept of diffraction becomes difficult to understand if the terminology remains inconsistent in its present form. Two terms, diffraction and interference, are used for the same phenomenon in different situations. Mathematical treatment is presented to understand these concepts clearly. (PS)