Results 1 to 10 of about 17,587 (297)
Metasurface‐Assisted Wireless Communication with Physical Level Information Encryption [PDF]
Advanced Science, 2022 Since the discovery of wireless telegraphy in 1897, wireless communication via electromagnetic (EM) signals has become a standard solution to address increasing demand for information transfer in modern society.
Yilin Zheng +6 more
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Journal of the Institution of Electrical Engineers, 1899 Maxwell\u27s theoretical deduction, as to the propagation of electric and magnetic energy by means of vibrations of the ether, was established experimentally by Hertz in 1887. This was a oulminative master stroke ending the two hundred years old problem,
Kelvin Reginald, A Fessel
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Early innovations in maritime telemedical services: the KDKF Radio Medico Station [PDF]
Journal of the Medical Library Association, 2023 “MAN PUT HIS TONGUE AGAINST REFRIGERATOR PIPE AND GOT IT FROZEN; HAVE THAWED IT OUT AND IT IS NOW BLISTERED AND SWOLLEN BUT NOT PAINFUL. ARRIVING HONOLULU FRIDAY; HOW CAN I HELP HIM MEANWHILE?” Thus read a message relayed via radiogram across the ocean ...
Johnathan Thayer +1 more
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A Historical Twist on Long-Range Wireless: Building a 103 km Multi-Hop Network Replicating Claude Chappe’s Telegraph [PDF]
Sensors, 2022 In 1794, French Engineer Claude Chappe coordinated the deployment of a network of dozens of optical semaphores. These formed “strings” that were hundreds of kilometers long, allowing for nationwide telegraphy.
Mina Rady +8 more
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Methodological Perspectives on British Commercial Telegraphy and the Colonial Struggle over Democratic Connections in Gibraltar, 1914–1941 [PDF]
Media and Communication, 2018 This article examines the privatization of telegraphy in the British Empire from the perspective of Gibraltar, an overseas territory in the Mediterranean. While the history of international telegraphy is typically written from a world-systems perspective,
Bryce Peake
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Nature, 1880 WE beg to thank Mr. Gordon for drawing attention to the fact that the principle of rotation of plane of polarisation of light in a magnetic field could not actually be employed with the form of receiver symbolically described by us in NATURE, vol. xxi. p. 589. Having satisfied ourselves that there could be no doubt of the feasibility of using the first
Perry, John, Ayrton, W. E.
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Wireless Telegraphy at the German Universal Exhibition in Ústí nad Labem in 1903 [1] [PDF]
Acta Polytechnica, 2008 This paper focuses on the transmission of wireless telegraphy between Ústí nad Labem and Teplice during the German Universal Exhibition in Ústí nad Labem in 1903.
T. Okurka
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“tmospherics”in Wireless Telegraphy [PDF]
Nature, 1914 WITH reference to Prof. Perry's letter on atmospherics in NATURE of January 8, a description of some experiments made by us in the summer of 1912, and continued last summer, may be of interest. A receiving station was erected near Rothbury, in Northumberland, with an antenna consisting of two horizontal wires stretched about 3 ft. from the ground.
Hall, Wilfred, Morris-Airey, H.
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