Transmission characteristics of the submarine cable

Evidence has been assembled to show that any deformable body moving in a fluid or immersed in a moving fluid will assume a shape that is as nearly as is possible “stream-line.”Illustrations of this principle of “stream-line” assumption are taken from geology, meteorology, physics, and biology.The adjustment of organisms in accordance with this principle is very similar to the adjustment by organisms to directed light (heliotropism) and to gravity (geotropism). Accordingly a term is suggested for defining this adjustment, vis., rheotropism.     

The use of signal properties for signal representation

An efficient procedure for signal representation, based on known signal properties, is presented. The representation minimizes the maximum of the ratio of the error and the signal norm, the per cent error. Signal classes are specified by normalized quadratic functionals. These results are contrasted with the theory of n-widths of signal classes, and several applications are developed.