In this paper the fundamental formulas of variable frequency electric circuit theory are first developed. These are then applied to a study of the transmission, reception and detection of frequency modulated waves. A comparison with amplitude modulation is made and quantitative formulas are developed for comparing the noise‐to‐signal power ratio in the two modes of modulation.
BY THORNTON C. FRY.
SYNOPSIS.Thermonic Current between Parallel Plane Electrodes. -The electrical equations applying to this problem are developed without neglecting the distribution of initial velocities, which in the 6rst place is allowed to be entirely general. Maxwell's distribution of velocities is then considered in detail and a complete solution obtained.Curves from ezhich to compute the space current when Maxwell's distribution applies are presented, together with an illustrative example of their use. Curves are
The report consists of three major sections. The first discusses mathematical specialists in industry, calls attention to the essentially consultative character of their work, and makes some observations regarding the education, employment and supervision of this type of personnel.
The second section deals, not with the work of these specialists, but with the uses to which mathematics is put at the hands of industrial workers in general, the various ways in which it contributes to the economy and effectiveness of research, and the kinds of mathematics that are most used. A number of illustrations are given, together with brief surveys of the utilization of mathematics in four important industries: communications, electrical manufacturing, petroleum and aircraft.
The third section is devoted to statistics, which touches industrial life at rather different points, and hence could not conveniently be included in the general discussion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.