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<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>
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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>
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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>
<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 Bernières (b. 1954)]</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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=== Article of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> ===
{{Image|Anthracite coal.jpg|right|275px|Anthracite coal (coin shown for scale).}}


'''Coal''' is a [[Carbon|carbon-containing]] rock formed by the debris from the decay of ferns, vines, trees and other plants which flourished in swamps millions of years ago. Over time, the debris became buried and the actions of [[bacteria]], [[heat]] and [[pressure]] transformed the debris first into [[peat]] (a precursor of coal) and then into the various types of coal as we know them today.<ref name=Perry>{{cite book|author=Green, Don W. and Perry, Robert H. (Editors)|title=Perry's Chemical Engineers' Handbook|edition=6th Edition|publisher=McGraw-Hill|year=1997|id=ISBN 0-07-049479-7}}</ref><ref name=Marks>{{cite book|author=Eugene A. Avallone, Theodore Baumeister and Ali Sadegh (Editors)|title=Marks' Standard Handbook for Mechanical Engineers|edition=11th Edition|publisher=McGraw-Hill Professional|year=2006|id=ISBN 0-07-142867-4}}</ref><ref name=Kreith>{{cite book|author=Frank Kreith (Editor)|title=The CRC Handbook of Mechanical Engineering|edition=1st Edition|publisher=CRC Press|year=1998|id=ISBN 0-8493-9418-X}}</ref> In more technical terminology, that process of transformation is referred to as ''metamorphosis'', ''coalification'' or ''lithification''.


Coal is extracted by [[mine (resource extraction)|mining]] from deposits that exist deep underground as well as deposits that are essentially at or near the surface of the ground. Because of the various degrees of transformation that occurred during the forming of coal deposits in different locations, the composition of coal varies from one deposit to another. No two coals are the same in every respect. In general, coal consists of [[carbon]], [[hydrogen]], [[oxygen]], [[nitrogen]], [[sulfur]] and [[mineral]] matter (including compounds of [[silicon]], [[aluminum]], [[iron]], [[calcium]], [[magnesium]] and others).<font size=1>[[Coal|['''more...''']]]</font>


=== New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> ===
'''Gasoline''' or '''petrol''' is a fuel, derived from [[petroleum crude oil]], for use in spark-ignited [[internal combustion engine]]s. Conventional gasoline is mostly a blended mixture of more than 200 different [[hydrocarbon]] [[liquid]]s ranging from those containing 4 [[carbon]] [[atom]]s to those containing 11 or 12  carbon atoms. It has an initial [[boiling point]] at [[atmospheric pressure]] of about 35 °[[Celsius|C]] (95 °[[Fahrenheit|F]]) and a final boiling point of about 200 °C (395 °F).<ref name=FAQ>[http://www.faqs.org/faqs/autos/gasoline-faq/part4/ Gasoline FAQ - Part2 of 4], Bruce Hamilton, Industrial Research Ltd. (IRL), a [[Crown Research Institute]] of [[New Zealand]].</ref><ref name=Gary>{{cite book|author=Gary, J.H. and Handwerk, G.E.|title=Petroleum Refining Technology and Economics|edition=4th Edition|publisher=Marcel Dekker, Inc.|year=2001|url=http://books.google.com/books?id=eE3_IqDeeosC&pg=PP1&dq=%22Petroleum+Refining+Technology+and+Economics%22&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=0&as_pt=ALLTYPES|id=ISBN 0-8247-0482-7}}</ref><ref name=Assi>[http://hqweb.unep.org/pcfv/PDF/JordanWrkshp-Unleaded-Rafat.pdf The Relation Between Gasoline Quality, Octane Number and the Environment], Rafat Assi, National Project Manager of Jordan’s Second National Communications on Climate Change, presented at ''Jordan National Workshop on Lead Phase-out'', [[United Nations Environment Programme]], July 2008, [[Amman]], [[Jordan]].</ref><ref>{{cite book|author=James Speight|title=Synthetic Fuels Handbook|edition=1st Edition|publisher=McGraw-Hill|pages=pages 92-93|year=2008|url=http://books.google.com/books?id=E3pgqnGgHjIC&printsec=frontcover&dq=%22Synthetic+Fuels+Handbook%22&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=0&as_pt=ALLTYPES|id=ISBN 0-07-149023-X}}</ref> Gasoline is used primarily as fuel for the internal combustion engines in automotive vehicles as well in some small airplanes.     
In [[Canada]] and the [[United States]], the word "gasoline" is commonly used and it is often shortened to simply "gas" although it is a liquid rather than a [[gas]]. In fact, gasoline-dispensing facilities are referred to as "gas stations".


Most current or former [[Commonwealth of Nations|Commonwealth countries]] use the term "petrol" and their dispensing facilities are referred to as "petrol stations". The term "petrogasoline" is also used sometimes. In some European countries and elsewhere, the term "benzin" (or a variant of that word) is used to denote gasoline.


In aviation, "mogas" (an abbreviation for "motor gasoline") is used to distinguish automotive vehicle fuel from aviation fuel known as "avgas".<font size=1>[[Gasoline/Draft|['''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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----<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 08:47, 31 October 2024

New Blog Post
Why is Citizendium deleting articles?


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.

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Article counts

Citable (146)
Developed (1,128)
Developing (7,393)
Stubs (7,672)
(16,469 total)

There is only one good, knowledge, and one evil, ignorance.
Socrates (469 BC - 399 BC), Diogenes Laertius, Lives of Eminent Philosophers
       —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.