P. David – författare

The industrial revolution in Great Britain was the first example of the transition to a modern industrial economy. Certain features of this transition were later copied and modified by other coutries undergoing the same process. This book considers the main similarities and differences in the process of industrialization, grouping the main countries according to sequence, characteristics, and status in the world economy. France, Belgium and Switzerland are examples of one type, and the USA and Germany form a second. Russia and Japan represent the many countries that developed a modern economy in the later phase of industrialization.

Propagation of Waves focuses on the wave propagation around the earth, which is influenced by its curvature, surface irregularities, and by passage through atmospheric layers that may be refracting, absorbing, or ionized. This book begins by outlining the behavior of waves in the various media and at their interfaces, which simplifies the basic phenomena, such as absorption, refraction, reflection, and interference. Applications to the case of the terrestrial sphere are also discussed as a natural generalization. Following the deliberation on the diffraction of the "ground wave around the earth, this text summarizes the role and properties of the troposphere and ionosphere from a general physical point of view. Examples and maps are provided to illustrate the use of the various methods in the determination of ranges or favorable wavelengths. A brief discussion on problems encountered in the field of space communications is also included. This publication is a good source for students and individuals researching on wave propagation, specifically on the principles of radiation and propagation in a homogeneous, isotropy, and lossless dielectric.