History of Science and Engineering Annotation << Back HISTORICAL BACKGROUND OF THE NECESSITY TO TAKE INTO ACCOUNT SOLAR ACTIVITY IN THE FORMATION AND DEVELOPMENT OF ELECTRICAL ENGINEERING FUNDAMENTALS P.E. Valivach, V.G. Grachev Solar activity generates cyclic processes on the Milky Way scale and, evidently, on the planet Earth. The papers of the authors V.P. Okhlopkova, Yu.I. Stozhkova, E.P. Popova allow to assure ourselves of the correctness of the hypothesis which was earlier proposed by one of the co-authors of this article. This hypothesis concerned the centennial cycles of the electrical engineering development within electrical engineering fundamentals (EEF) since 1620. Besides it should be noted that the solar minima called after scientists R. Wolf, G. Spörer, E. Maunder, are correlated in time to the beginning and end of the centennial cycles of the electrical engineering development. In the history of mankind, time intervals of 100 and 1000 years have always attracted attention not only as chronological parameters. They tried to see a historical boundary in them, a cyclical component of human existence. So, according to the analysis of the material of the article written by E.P. Popova, there are coincidences on the time scale of 1420–1520–1620–1720–1820 with the periods of solar minima. The tendency of solar minimum by 2020 is clearly visible. Proceeding from this, it seems advisable to make a suggestion about the next spurt in discoveries in the EEF in (the section of microelectrodynamics) and quantum physics by 2020. Certain results in the science of dendrochronology serve as additional arguments in the correctness of this hypothesis. In the opinion of the authors of this article, and taking into account the materials they have published earlier, the hypothesis of centennial cycles of the electrical engineering development quite reasonably seeks to be a statistical regularity in the history of the formation and development of the EEF. Keywords: solar activity; cyclic processes; electrotechnical knowledge; theoretical fundamentals of electrical engineering; sunspots; solar activity; dendrochronology; regularity. DOI: 10.25791/intstg.02.2019.470 Contacts: E-mail: petrvalevach@mail.ru, E-mail: corvax@mail.ru Pp. 03-11.