Early telecommunications

Langue : anglais

Edité par Reference Series Books LLC Jun 2012, 2012

1155441656 / 9781155441658

Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, AllemagneBuchWeltWeit Ludwig Meier e.K.

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This item is printed on demand - it takes 3-4 days longer - Neuware -Source: Wikipedia. Pages: 39. Chapters: Telecommunication, Carrier pigeon, Photophone, Smoke signal, Beacon, Semaphore line, Relay league, Claude Chappe, Canadian Parliamentary Motion on Alexander Graham Bell, Mechanical television, Heliograph, Homing pigeon, Whistled language, Bullroarer, Drum, Speaking tube, Hydraulic telegraph, Signal lamp, Polybius square, Fiery cross, Abraham Niclas Edelcrantz, Telephonoscope, Fryctoria, Telegraph hill. Excerpt: Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded drumbeats, lung-blown horns, or sent by loud whistles, for example. In the modern age of electricity and electronics, telecommunications now also includes the use of electrical devices such as telegraphs, telephones, and teleprinters, the use of radio and microwave communications, as well as fiber optics and their associated electronics, plus the use of the orbiting satellites and the Internet. A revolution in wireless telecommunications began in the first decade of the 20th century with pioneering developments in wireless radio communications by Nikola Tesla and Guglielmo Marconi. Marconi won the Nobel Prize in Physics in 1909 for his efforts. Other highly notable pioneering inventors and developers in the field of electrical and electronic telecommunications include Charles Wheatstone and Samuel Morse (telegraph), Alexander Graham Bell (telephone), Edwin Armstrong, and Lee de Forest (radio), as well as John Logie Baird and Philo Farnsworth (television). Telecommunications play an important role in the world economy and the worldwide telecommunication industry's revenue was estimated to be $3.85 trillion in 2008. The service revenue of the global telecommunications industry was estimated to be $1.7 trillion in 2008, and is expected to touch $2.7 trillion by 2013. Greek hydraulic semaphore systems were used as early as the 4th century BC. The hydraulic semaphores, which worked with water filled vessels and visual signals, functioned as optical telegraphs. However, they could only utilize a very limited range of pre-determined messages, and as with all such optical telegraphs could only be deployed during good visibility conditions. During the Middle Ages, chains of beacons were com 40 pp. Englisch.…

N° de réf. du vendeur 9781155441658

Détails bibliographiques

Titre
Early telecommunications
Auteur
Source
Éditeur
Reference Series Books LLC Jun 2012
Année de publication
2012
État de l'article
Neu
Reliure
Taschenbuch
Langue
anglais
ISBN à 10 chiffres
1155441656
ISBN à 13 chiffres
9781155441658
Poids de l'article
100 grammes
Dimensions
246x189x3 mm

BuchWeltWeit Ludwig Meier e.K.

Bergisch Gladbach, Allemagne

Vendeur avec une évaluation de 5 étoiles

Vendeur AbeBooks depuis 11 janvier 2012

Frais d'expédition de Allemagne vers Etats-Unis

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BuchWeltWeit Ludwig Meier e.K.

Allemagne