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(Commented out Nature comment, as it links to a pay page. Can we get a legal copy?)
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:* [[:Category:Approved Articles|Approved Articles]]
:* [[:Category:Developed Articles|Developed Articles]] <font size=1>(over&nbsp;900)</font>
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|<div style="background-color:lightyellow; color:darkblue; font-size:90%"><!--
<center>'''"Share your knowledge. It's a way to achieve immortality."'''</center>
<center>&mdash;Jackson Brown and H. Jackson Brown, Jr., ''Life's Little Instruction Book''</center>
<center>'''"The ink of the learned is equal in merit to the blood of the martyrs."'''</center>
<center>&mdash;Father Kristoforos, '[[''Birds Without Wings'']], by [[Louis de Bernieres]]</center>
<center>'''"Trust yourself. You know more than you think you do."'''</center>
<center>&mdash;[[Benjamin Spock|Dr. Benjamin Spock (1903-1998)]]</center>
<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>
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<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>
<center>&mdash;Father Kristoforos, [http://www.randomhouse.com/catalog/display.pperl?isbn=9781400079322&view=rg ''Birds Without Wings''], by [http://www.contemporarywriters.com/authors/?p=auth2 Louis de Bernieres (b. 1954)]</center>
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=== Article of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> ===
The '''[[Ether (physics)|ether]]''' (also spelled '''aether''') was a concept in [[physics]] made obsolete in 1905 by [[Albert Einstein|Einstein]]'s theory of [[special relativity]].


The idea of an ether was introduced into science by [[René Descartes|Descartes]] in [[Principles of Philosophy|Principia philosophiae]] (1644). Until that time, forces between two bodies that are not in direct contact were assumed to act through space&mdash;by [[action at a distance]]. Descartes  replaced this explanation by one based on an intermediate medium (ether) consisting of vortices that transmit forces between bodies at a distance.


The ether concept became especially predominant in the 19th century by the work of [[Thomas Young|Young]] and [[Augustin-Jean Fresnel|Fresnel]] who revived [[Christiaan Huygens|Huygens]]' wave theory of light.  They replaced [[Newton]]'s light corpuscles by waves propagating through the ether. In order to explain [[stellar aberration]], first observed in the 1720s and then shown to be caused by the velocity of the earth relative to the velocity of Newton's light corpuscles, Young (1804) assumed ether to be in a state of absolute rest.  [[James Clerk Maxwell|Maxwell]]  showed in the 1860s that light waves are [[electromagnetic wave]]s  transverse (perpendicular) to the direction of the propagation  of the waves. Following Young and Fresnel,  Maxwell assumed that electromagnetic waves are vibrations of the ether.   
<font size=1>[[Ether (physics)|['''more...''']]]</font>


=== New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> ===
In computer and network security, a '''[[Worm (computers)|worm]]''' is a form of [[malware]] that, once it activates inside a victim's computer, can replicate and propagate itself without further user activity. Worms often take up valuable memory and network bandwidth, which can cause a computer to stop responding, and can also allow attackers to gain unauthorized remote control of one or more computers.


While the idea of a parasitic worm goes far back in biology, the term appears to have first been used as, as a concept in computing, in [[John Brunner]]'s 1975 science fiction novel, ''[[Shockwave Rider]]''.  Actual software, under tightly controlled conditions, was developed in 1981-1982. <font size=1>[[Worm (computers)|['''more...''']]]</font>
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<h4 style="margin:0 0 0.75em; padding:0;"> '''Article counts''' </h4>
<p style="line-height:15px; padding-left:20px;">
[[:Category:Citable versions of articles|Citable]] <font size=1>('''{{PAGESINCAT:Citable versions of articles}}''')</font><br />
[[:Category:Developed Articles|Developed]] <font size=1>('''{{PAGESINCAT:Developed Articles}}''')</font><br />
[[:Category:Developing Articles|Developing]] <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]])</small>
</p>
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ONGOING CLEANUP:<br>
<p style="line-height:15px; padding-left:2px;">
[[:Category:External_Articles|Ext]] <font size=1>('''{{PAGESINCAT:External_Articles}}''')</font>&nbsp;|&nbsp;
[[:Category:Pages with reference errors|Refs]] <font size=1>('''{{PAGESINCAT:Pages with reference errors}}''')</font><br>
[[:Category:Lemma Article|Definition only]] <font size=1>('''{{PAGESINCAT:Lemma Article}}''')</font><br />
</p>
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{{CZ:Quote}}
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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>

Revision as of 13:54, 4 September 2024

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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 (146)
Developed (1,128)
Developing (7,390)
Stubs (7,672)
(16,466 total)


ONGOING CLEANUP:

Ext (185) |  Refs (54)
Definition only (3,734)

Share your knowledge. It's a way to achieve immortality. — Jackson Browne, Life's Little Instruction Book
       —add a quotation about knowledge or writing


Featured Article: Poverty

The Mathare Valley slum near Nairobi, Kenya, in 2009.

Poverty is deprivation based on lack of material resources. The concept is value-based and political. Hence its definition, causes and remedies (and the possibility of remedies) are highly contentious.[1] The word poverty may also be used figuratively to indicate a lack, instead of material goods or money, of any kind of quality, as in a poverty of imagination.

Definitions

Primary and secondary poverty

The use of the terms primary and secondary poverty dates back to Seebohm Rowntree, who conducted the second British survey to calculate the extent of poverty. This was carried out in York and was published in 1899. He defined primary poverty as having insufficient income to “obtain the minimum necessaries for the maintenance of merely physical efficiency”. In secondary poverty, the income “would be sufficient for the maintenance of merely physical efficiency were it not that some portion of it is absorbed by some other expenditure.” Even with these rigorous criteria he found that 9.9% of the population was in primary poverty and a further 17.9% in secondary.[2]

Absolute and comparative poverty

More recent definitions tend to use the terms absolute and comparative poverty. Absolute is in line with Rowntree's primary poverty, but comparative poverty is usually expressed in terms of ability to play a part in the society in which a person lives. Comparative poverty will thus vary from one country to another.[3] The difficulty of definition is illustrated by the fact that a recession can actually reduce "poverty".

Causes of poverty

The causes of poverty most often considered are:

  • Character defects
  • An established “culture of poverty”, with low expectations handed down from one generation to another
  • Unemployment
  • Irregular employment, and/or low pay
  • Position in the life cycle (see below) and household size
  • Disability
  • Structural inequality, both within countries and between countries. (R H Tawney: “What thoughtful rich people call the problem of poverty, thoughtful poor people call with equal justice a problem of riches”)[4]

As noted above, most of these, or the extent to which they can be, or should be changed, are matters of heated controversy.

Footnotes

  1. Alcock, P. Understanding poverty. Macmillan. 1997. ch 1.
  2. Harris, B. The origins of the British welfare state. Palgrave Macmillan. 2004. Also, Oxford Dictionary of National Biography.
  3. Alcock, Pt II
  4. Alcock, Preface to 1st edition and pt III.