Papyrus 23 - Revision history

en>JohnThorne at 16:58, 29 November 2014

2014-11-29T16:58:50Z

← Older revision		Revision as of 18:58, 29 November 2014
Line 1:		Line 1:
	~~In [[solid-state physics]],~~ the ~~'''Poole–Frenkel effect''' (also known as '''Frenkel-Poole emission'''<ref name=Sze>Sze, ''Physics~~ of ~~Semiconductor Devices'', 2nd edition, Section 7~~.3.4.</~~ref>) is a means by which an [[electrical insulator]] can conduct electricity~~. ~~It is named after [[Yakov Frenkel]~~], ~~who published on it in 1938,<ref>J~~. ~~Frenkel, "On pre-breakdown phenomena in insulators~~ and ~~electronic semi-conductors", Phys. Rev~~., ~~vol. 54~~, ~~pp. 647-648, 1938. In this paper published in USA, Frenkel only very briefly mentioned an empirical relationship as Poole~~'~~s law. Frenkel cited Poole's paper when he wrote a longer article in~~ a ~~Soviet journal. (Note: Yakov Frenkel quite frequently put down his~~ name ~~as J~~. ~~Frenkel when he published his papers in journals using the English language.)~~<~~/ref~~> and ~~also after H. H. Poole (Horace Hewitt Poole, 1886-1962), Ireland~~.		CMS provides the best platform to create websites that fulfill all the specifications of SEO. Medical word press themes give you the latest medical designs. The Word - Press Dashboard : an administrative management tool that supports FTP content upload 2. If you have any questions concerning where and the best ways to utilize [http://xd03.com/WordpressDropboxBackup926218/ wordpress backup], you could contact us at our own web site. s ultimately easy to implement and virtually maintenance free. All this is very simple, and the best thing is that it is totally free, and you don't need a domain name or web hosting. <br><br>You just download ready made templates to a separate directory and then choose a favorite one in the admin panel. Infertility can cause a major setback to the couples due to the inability to conceive. A Wordpress plugin is a software that you can install into your Wordpress site. You can up your site's rank with the search engines by simply taking a bit of time with your site. The biggest advantage of using a coupon or deal plugin is that it gives your readers the coupons and deals within minutes of them becoming available. <br><br>Saying that, despite the launch of Wordpress Express many months ago, there has still been no sign of a Wordpress video tutorial on offer UNTIL NOW. Note: at a first glance WP Mobile Pro themes do not appear to be glamorous or fancy. This platform can be customizedaccording to the requirements of the business. These frequent updates have created menace in the task of optimization. After that the developer adds the unordered list for navigations. <br><br>The next thing I did after installing Wordpress was to find myself a free good-looking Wordpress-theme offering the functionality I was after. Find more information about Design To Wordpress here. Next you'll go by way of to your simple Word - Press site. So, we have to add our social media sharing buttons in website. Now all you have to do is log into your Word - Press site making use of the very same username and password that you initially had in your previous site. <br><br>Many developers design websites and give them to the clients, but still the client faces problems to handle the website. If you operate a website that's been built on HTML then you might have to witness traffic losses because such a site isn't competent enough in grabbing the attention of potential consumers. You can select color of your choice, graphics of your favorite, skins, photos, pages, etc. Working with a Word - Press blog and the appropriate cost-free Word - Press theme, you can get a professional internet site up and published in no time at all. 95, and they also supply studio press discount code for their clients, coming from 10% off to 25% off upon all theme deals.

	~~Electrons~~ can ~~move (slowly) through an insulator by~~ the ~~following method. The electrons are generally trapped in localized states (loosely speaking, they are "stuck"~~ to ~~a single atom, and not free~~ to ~~move around the crystal)~~. ~~Occasionally, random thermal fluctuations will give~~ that ~~electron enough energy to get out of its localized state, and move to the [[conduction band]]~~. ~~Once there, the electron~~ can ~~move through~~ the ~~crystal, for~~ a ~~brief amount~~ of time~~, before relaxing into another localized state (in other words, "sticking" to a different atom)~~. The ~~Poole–Frenkel effect describes how, in~~ a ~~large [[electric field]]~~, the ~~electron doesn't need as much thermal energy to get into the conduction band (because part~~ of ~~this energy comes from being pulled by the electric field)~~, ~~so it does~~ not ~~need as large a thermal fluctuation and will~~ be ~~able to move more frequently~~.

	~~Taking everything into account (both~~ the ~~frequency with which electrons get excited into~~ the ~~conduction band, and their motion once they're there),~~ the ~~standard quantitative expression~~ for ~~the Poole–Frenkel effect is:<ref name=Sze/><ref name=rottlaender>Rottländer et al~~.~~, Phys. Rev. B 65, 054422 (2002)~~<~~/ref~~>
	:<~~math~~>~~J \propto E \exp \left ( \frac{~~-~~q \left ( \phi_B~~-~~\sqrt{qE/(\pi \epsilon)} \ \right ) }{k_BT} \right ) </math>~~
	~~where:~~
	~~:''J'' is~~ the ~~[[current density]]~~
	~~:''E'~~' is the ~~applied [[electric field]]~~
	~~:''q'' is the [[elementary charge]]~~
	~~:<math>\phi_B</math> is the voltage barrier (in zero applied electric field)~~ that ~~an electron must cross to move from one atom to another~~ in ~~the crystal~~
	:<~~math~~>~~\epsilon~~<~~/math~~> is the ~~dynamic [[permittivity]]~~
	~~:''d'' is~~ the ~~thickness of~~ the ~~insulator~~
	~~:<math>k_B</math> is [[Boltzmann~~'s ~~constant]]~~
	:'~~'T'' is~~ the ~~[[temperature]]~~.

	~~==References==~~
	~~{{reflist}}~~

	~~==External links==~~
	*[http://my.ece.ucsb.edu/yorklab/Projects/Ferroelectrics/General%20Info/SKSFETutorialptC.pdf Slides on leakage mechanisms in insulators, ~~including the Poole–Frenkel effect]~~
	*[http://www.~~unilim.fr/theses/2003/sciences/2003limo0032/images/image348.jpg Diagram of an electron undergoing Poole~~-~~Frenkel emission] <~~- ~~dead link~~

	~~{{DEFAULTSORT:Poole~~-~~Frenkel effect}}~~
	~~[[Category:Condensed matter physics]]~~
	~~[[Category:Quantum mechanics]]~~


	~~{{condensedmatter-stub}}~~

en>Leszek Jańczuk: interwiki

2013-02-26T21:30:59Z

interwiki

← Older revision		Revision as of 23:30, 26 February 2013
Line 1:		Line 1:
	~~They are typically a free website that are pre~~-~~designed for enabling businesses~~ of ~~every size in marking the presence on the internet and allows them in showcasing the product services and range through images~~, ~~contents and various other elements~~. ~~Good luck on continue learning how to make~~ a ~~wordpress website~~. ~~PSD files are incompatible to browsers and are suppose to be converted into wordpress compatible files so that~~ it ~~opens up~~ in ~~browser~~. ~~Out of the various designs of photography identified these days~~, ~~sports photography is preferred most~~, ~~probably for the enjoyment and enjoyment associated with it~~. ~~The top 4 reasons to use Business Word~~ - ~~Press Themes for~~ a ~~business website are~~:. <~~br><br~~>		In [[solid-state physics]], the '''Poole–Frenkel effect''' (also known as '''Frenkel-Poole emission'''<ref name=Sze>Sze, ''Physics of Semiconductor Devices'', 2nd edition, Section 7.3.4.</ref>) is a means by which an [[electrical insulator]] can conduct electricity. It is named after [[Yakov Frenkel]], who published on it in 1938,<ref>J. Frenkel, "On pre-breakdown phenomena in insulators and electronic semi-conductors", Phys. Rev., vol. 54, pp. 647-648, 1938. In this paper published in USA, Frenkel only very briefly mentioned an empirical relationship as Poole's law. Frenkel cited Poole's paper when he wrote a longer article in a Soviet journal. (Note: Yakov Frenkel quite frequently put down his name as J. Frenkel when he published his papers in journals using the English language.)</ref> and also after H. H. Poole (Horace Hewitt Poole, 1886-1962), Ireland.

	~~As you know today Word - Press has turn out to be a tremendously popular open source publishing and blogging display place. You may either choose to link only to the top-level category pages or~~ the ~~ones that contain information about your products and services~~. ~~You~~ are ~~able to set them within your theme options and so~~ they ~~aid the search engine~~ to ~~get~~ a ~~suitable title~~ and ~~description for~~ the ~~pages~~ that get ~~indexed by Google. If you have any sort~~ of ~~questions pertaining~~ to ~~where and~~ the ~~best ways to use~~ [~~http://txtexe~~.~~com/87689a backup plugin]~~, ~~you could call us at~~ the ~~web-page. These four plugins will make this effort easier and~~ the ~~sites run effectively as well as make~~ other ~~widgets added~~ to a ~~site easier to configure~~. ~~Once you~~'~~ve installed~~ the ~~program you can quickly begin~~ by ~~adding content and editing~~ it ~~with features such~~ as ~~bullet pointing, text alignment~~ and ~~effects without having~~ to ~~do all~~ the ~~coding yourself. <br><br>Your Word - Press blog or site will also require a domain name~~ which ~~many hosting companies can also provide. When a business benefits from its own domain name~~ and ~~a tailor-made blog~~, the ~~odds of ranking higher in~~ the ~~search engines and being visible to a greater number of people~~ is ~~more likely~~. ~~Are you considering getting your website redesigned. Nonetheless, with stylish Facebook themes obtainable on the Globe Broad Internet~~, ~~half of your enterprise is done previously~~. ~~Websites using this content based strategy are always given top scores by Google~~. <br><br>~~Numerous bloggers are utilizing Word~~ - ~~Press and with good reason. But~~ the ~~Joomla was created as~~ the ~~CMS over years of hard work. Normally,~~ the ~~Word - Press developers make a thorough research on your website goals and then ingrain~~ the ~~most suitable graphical design elements~~ to ~~your website. There are many advantages~~ of ~~hiring Wordpress developers for Wordpress project development~~:~~. Word - Press offers constant updated services and products, that too, absolutely free of cost.~~ <br><br>~~More it extends numerous opportunities where your firm~~ is ~~at comfort and rest assured of no risks & errors~~. ~~Automated deal feed integration option to populate your blog with relevant deals~~. ~~As a result, it is really crucial to just take aid of some experience when searching for superior quality totally free Word - Press themes, Word - Press Premium Themes for your web site~~. ~~Page speed is an important factor~~ in ~~ranking~~, ~~especially with Google~~. ~~I have never seen a plugin with such a massive array~~ of features, this does everything that platinum SEO and All In One SEO, also throws in the functionality found within SEO Smart Links and a number of other plugins it is essentially the swiss army knife of Word - ~~Press plugins.~~		Electrons can move (slowly) through an insulator by the following method. The electrons are generally trapped in localized states (loosely speaking, they are "stuck" to a single atom, and not free to move around the crystal). Occasionally, random thermal fluctuations will give that electron enough energy to get out of its localized state, and move to the [[conduction band]]. Once there, the electron can move through the crystal, for a brief amount of time, before relaxing into another localized state (in other words, "sticking" to a different atom). The Poole–Frenkel effect describes how, in a large [[electric field]], the electron doesn't need as much thermal energy to get into the conduction band (because part of this energy comes from being pulled by the electric field), so it does not need as large a thermal fluctuation and will be able to move more frequently.

			Taking everything into account (both the frequency with which electrons get excited into the conduction band, and their motion once they're there), the standard quantitative expression for the Poole–Frenkel effect is:<ref name=Sze/><ref name=rottlaender>Rottländer et al., Phys. Rev. B 65, 054422 (2002)</ref>
			:<math>J \propto E \exp \left ( \frac{-q \left ( \phi_B-\sqrt{qE/(\pi \epsilon)} \ \right ) }{k_BT} \right ) </math>
			where:
			:''J'' is the [[current density]]
			:''E'' is the applied [[electric field]]
			:''q'' is the [[elementary charge]]
			:<math>\phi_B</math> is the voltage barrier (in zero applied electric field) that an electron must cross to move from one atom to another in the crystal
			:<math>\epsilon</math> is the dynamic [[permittivity]]
			:''d'' is the thickness of the insulator
			:<math>k_B</math> is [[Boltzmann's constant]]
			:''T'' is the [[temperature]].

			==References==
			{{reflist}}

			==External links==
			*[http://my.ece.ucsb.edu/yorklab/Projects/Ferroelectrics/General%20Info/SKSFETutorialptC.pdf Slides on leakage mechanisms in insulators, including the Poole–Frenkel effect]
			*[http://www.unilim.fr/theses/2003/sciences/2003limo0032/images/image348.jpg Diagram of an electron undergoing Poole-Frenkel emission] <- dead link

			{{DEFAULTSORT:Poole-Frenkel effect}}
			[[Category:Condensed matter physics]]
			[[Category:Quantum mechanics]]


			{{condensedmatter-stub}}

en>ZéroBot: r2.7.1) (Robot: Adding es:Papiro 23

2012-02-17T08:24:16Z

r2.7.1) (Robot: Adding es:Papiro 23

New page

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As you know today Word - Press has turn out to be a tremendously popular open source publishing and blogging display place. You may either choose to link only to the top-level category pages or the ones that contain information about your products and services. You are able to set them within your theme options and so they aid the search engine to get a suitable title and description for the pages that get indexed by Google. If you have any sort of questions pertaining to where and the best ways to use [http://txtexe.com/87689a backup plugin], you could call us at the web-page. These four plugins will make this effort easier and the sites run effectively as well as make other widgets added to a site easier to configure. Once you've installed the program you can quickly begin by adding content and editing it with features such as bullet pointing, text alignment and effects without having to do all the coding yourself. Your Word - Press blog or site will also require a domain name which many hosting companies can also provide. When a business benefits from its own domain name and a tailor-made blog, the odds of ranking higher in the search engines and being visible to a greater number of people is more likely. Are you considering getting your website redesigned. Nonetheless, with stylish Facebook themes obtainable on the Globe Broad Internet, half of your enterprise is done previously. Websites using this content based strategy are always given top scores by Google. Numerous bloggers are utilizing Word - Press and with good reason. But the Joomla was created as the CMS over years of hard work. Normally, the Word - Press developers make a thorough research on your website goals and then ingrain the most suitable graphical design elements to your website. There are many advantages of hiring Wordpress developers for Wordpress project development:. Word - Press offers constant updated services and products, that too, absolutely free of cost. More it extends numerous opportunities where your firm is at comfort and rest assured of no risks & errors. Automated deal feed integration option to populate your blog with relevant deals. As a result, it is really crucial to just take aid of some experience when searching for superior quality totally free Word - Press themes, Word - Press Premium Themes for your web site. Page speed is an important factor in ranking, especially with Google. I have never seen a plugin with such a massive array of features, this does everything that platinum SEO and All In One SEO, also throws in the functionality found within SEO Smart Links and a number of other plugins it is essentially the swiss army knife of Word - Press plugins.