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Publishing Programs |
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To make their work available to as wide a market as possible, the publication of newsletters, magazines and books forms one of the key elements of most think tanks. Therefore most of these institutions undertake extensive publishing programs and run their own periodicals. Mostly accessible by subscription or individual sale those publications aim at the widespread distribution of their respective ideology. Recently think tanks have also started to discover new media as useful tools for their purposes. A lot of the bigger institutions have set up websites, which provide general information as well as articles and research reports.
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Chappe's fixed optical network
Claude Chappe built a fixed optical network between Paris and Lille. Covering a distance of about 240kms, it consisted of fifteen towers with semaphores.
Because this communication system was destined to practical military use, the transmitted messages were encoded. The messages were kept such secretly, even those who transmit them from tower to tower did not capture their meaning, they just transmitted codes they did not understand. Depending on weather conditions, messages could be sent at a speed of 2880 kms/hr at best.
Forerunners of Chappe's optical network are the  Roman smoke signals network and Aeneas Tacitus' optical communication system.
For more information on early communication networks see Gerard J. Holzmann and Bjoern Pehrson, The Early History of Data Networks.
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