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<center>'''"Share your knowledge. It's a way to achieve immortality."'''</center>
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<center>'''"Knowledge is the true organ of sight, not the eyes."'''</center>
<center>&mdash;From the [[Panchatantra|Panchatantra]] [http://www.britannica.com/EBchecked/topic/440899/Panchatantra (Indian literature)]</center>
<center>'''"The ink of the learned is equal in merit to the blood of the martyrs."'''</center>
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=== Article of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> ===
[[Image:Johannes Diderik van der Waals photographic portrait.jpg|right|thumb|175px|{{Johannes Diderik van der Waals photographic portrait.jpg/credit}}<BR>Johannes Diderik van der Waals, most probably around 1910 when he was awarded the [[Nobel Prize]].]]
'''Johannes Diderik van der Waals''' ([[Leiden]], November 23, 1837 &ndash; [[Amsterdam]], March 8, 1923) was a [[Netherlands|Dutch]] [[theoretical physics|theoretical physicist]]. His name is primarily associated with the [[van der Waals equation]] of [[State (physics)|state]] that describes the behavior of [[gas]]es and their condensation to the [[liquid]] [[phase]]. His name is also associated with [[van der Waals forces]] (forces between stable [[molecule]]s),  with [[van der Waals molecule]]s (small molecular clusters bound by van der Waals forces), and with [[van der Waals radius|van der Waals radii]] (sizes of molecules). He became the first [[physics]] professor of the [[University of Amsterdam]] when it opened in 1877.


Johannes Diderik was the oldest of ten children born to Jacobus van der Waals and Elisabeth van den Berg. His father was a [[carpenter]] in the Dutch city of [[Leiden]]. As was usual for [[working class]] children in the 19<sup>th</sup> century, he did not go to the kind of secondary school that would have given him the right to enter university. Instead he went to a school of "advanced primary education", which he finished at the age of fifteen. He then became a teacher's apprentice in an elementary school. Between 1856 and 1861 he followed courses and gained the necessary qualifications to become a primary school teacher and head teacher.<font size=1>[[Johannes Diderik van der Waals/Draft|['''more...''']]]</font>


=== New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> ===
'''John Brock''' is a fictional British undercover agent created by [[Desmond Skirrow]].  He appeared in three fast-paced, witty, and irreverent spy novels written in the late 1960s.  Like his creator, he is a successful advertising executive in London; but he is also a part-time agent coerced to work from time to time for a secret department on the Addison Road run by the fat man.<ref>Although he is invariably referred to as the fat man, and is called He and Him by some of his underlings, in neither the British nor American editions is he ever capitalized as The Fat Man or the Fat Man.</ref>  Brock is tough, witty, combative, extremely competent, and supremely resilient. Even by fictional standards, he absorbs incredible amounts of physical damage at the hands of his adversaries before, after a few whiskeys and a few hours sleep, he is ready for his next fight against overwhelming odds and, quite likely, yet another beating.


==Cigarettes and sweet white wine==
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<h4 style="margin:0 0 0.75em; padding:0;"> '''Article counts''' </h4>
<p style="line-height:21px; padding-left:20px;">
[[:Category:Citable versions of articles|Citable Articles]] <font size=1>('''{{PAGESINCAT:Citable versions of articles}}''')</font><br />
[[:Category:Developed Articles|Developed Articles]] <font size=1>('''{{PAGESINCAT:Developed Articles}}''')</font><br />
[[:Category:Developing Articles|Developing Articles]] <font size=1>('''{{PAGESINCAT:Developing Articles}}''')</font><br />
[[:Category:Stub Articles|Stubs]] <font size=1>('''{{PAGESINCAT:Stub Articles}}''')</font><br />
<small>([[:Category:CZ Live|{{PAGESINCAT:CZ Live}} total articles]])</small>
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{{CZ:Quote}}
<br>


At the time of his first appearance in ''[[It Won't Get You Anywhere]]'', published in 1966, Brock is most likely in his early 40s, a large, tough, extremely strong man who had apparently served with British special forces in small boats during [[World War II]], probably with SIS ([[Secret Intelligence Service]]} or SOE ([[Special Operations Executive]]).<font size=1>[[John Brock|['''more...''']]]</font>  
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<h3 style="margin-top:0; padding-top:0.6em; border-top:1px dotted #e0e0e0;">
<big>[[CZ:Featured article|Featured Article]]: ''[[{{FeaturedArticleTitle}}]]''</big>  
</h3>
{{CZ:Featured article/Current}}
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<div style='text-align: right;'><small>''[[{{FeaturedArticleTitle}}|Continued]]...''</small></div>

Latest revision as of 19:28, 18 February 2024

Help Write Articles about our World

Welcome to Citizendium, a wiki for providing free knowledge where authors use their real names. We regard information as a public good and welcome anyone who wants to share their knowledge on virtually any subject. Our online community prides itself on being congenial and supportive. Read more about who we are.


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Article counts

Citable Articles (145)
Developed Articles (1,143)
Developing Articles (7,878)
Stubs (7,959)
(17,243 total articles)

Knowledge is not simply another commodity. On the contrary. Knowledge is never used up. It increases by diffusion and grows by dispersion.
Daniel Boorstin

       —add a quotation about knowledge or writing

Featured Article: Telephone newspaper/Citable Version

1901 photograph of a stentor (announcer) at the Budapest Telefon Hirmondó.
Telephone newspaper is a general term for the telephone-based news and entertainment services which were introduced beginning in the 1890s, and primarily located in large European cities. These systems were the first example of electronic broadcasting, and offered a wide variety of programming, however, only a relative few were ever established. Although these systems predated the invention of radio, they were supplanted by radio broadcasting stations beginning in the 1920s, primarily because radio signals were able to cover much wider areas with higher quality audio.

History

After the electric telephone was introduced in the mid-1870s, it was mainly used for personal communication. But the idea of distributing entertainment and news appeared soon thereafter, and many early demonstrations included the transmission of musical concerts. In one particularly advanced example, Clément Ader, at the 1881 Paris Electrical Exhibition, prepared a listening room where participants could hear, in stereo, performances from the Paris Grand Opera. Also, in 1888, Edward Bellamy's influential novel Looking Backward: 2000-1887 foresaw the establishment of entertainment transmitted by telephone lines to individual homes.

The scattered demonstrations were eventually followed by the establishment of more organized services, which were generally called Telephone Newspapers, although all of these systems also included entertainment programming. However, the technical capabilities of the time meant that there were limited means for amplifying and transmitting telephone signals over long distances, so listeners had to wear headphones to receive the programs, and service areas were generally limited to a single city. While some of the systems, including the Telefon Hirmondó, built their own one-way transmission lines, others, including the Electrophone, used standard commercial telephone lines, which allowed subscribers to talk to operators in order to select programming. The Telephone Newspapers drew upon a mixture of outside sources for their programs, including local live theaters and church services, whose programs were picked up by special telephone lines, and then retransmitted to the subscribers. Other programs were transmitted directly from the system's own studios. In later years, retransmitted radio programs were added.

During this era telephones were expensive luxury items, so the subscribers tended to be the wealthy elite of society. Financing was normally done by charging fees, including monthly subscriptions for home users, and, in locations such as hotel lobbies, through the use of coin-operated receivers, which provided short periods of listening for a set payment. Some systems also accepted paid advertising.

Footnotes