Hertz: Electromagnetic Waves
On November 11, 1886, Heinrich Hertz, the pioneer of high-frequency and radio technology, for the first time observed the propagation of an electromagnetic wave with this setup.
On November 11, 1886, Heinrich Hertz, the pioneer of high-frequency and radio technology, for the first time observed the propagation of an electromagnetic wave with this setup.
In October 1861 Philipp Reis presented his “telephone” to the members of the physics association in Frankfurt.
This essay discusses methodological difficulties of the established concept of social memory for the analysis of energo-political discourse. It examines the case study of the German-Russian energy cooperation on the natural gas market which began with the discovery of the Urengoi gas field in 1966.
In this Special Section on Familiarizing the Extraterrestrial / Making Our Planet Alien, edited by Istvan Praet and Juan Francisco Salazar, David Dunér scrutinizes the underlying suppositions involved in the search for extraterrestrial intelligence (SETI) research, particularly the last three factors of the Drake equation.
Etienne Sabatier and Charlie Huveneers examine media portrayals of human-shark encounters between 2011 and 2013 in the state of Western Australia, arguing that negative framing by media feeds public anxiety.