Land-use forecasting - Revision history

en>AnomieBOT: Dating maintenance tags: {{Citations}}

2014-05-09T02:01:22Z

Dating maintenance tags: {{Citations}}

← Older revision		Revision as of 04:01, 9 May 2014
Line 1:		Line 1:
	~~{{About\|mass deficits in galaxies\|mass deficits in atomic nuclei\|Binding energy}}~~		I'm Luther but I by no means truly liked that name. Her buddies say it's not good for her but what she loves performing is flower arranging and she is trying to make it a occupation. I am a cashier and I'll be promoted quickly. Delaware is the location I adore most but I require to transfer for my family members.<br><br>Feel free to visit my homepage [http://Www.Chatel7Yat.com/games/profile/cabrothers Www.Chatel7Yat.com]
	A '~~''mass deficit''' is the amount of mass (in stars)~~ that ~~has been removed from the center of a [[galaxy]], presumably by the action of a [[binary star\|binary]] [[supermassive black hole]]~~.

	~~[[File:mdef.jpg\|thumb\|left\|Mass deficit.]]~~

	~~The density of stars increases toward the center in most galaxies. In small galaxies, this increase continues into the very center. In large galaxies, there~~ is ~~usually a "core", a region near the center where the density~~ is constant or slowly rising. The size of the core – the "core radius" – can be as great as a few hundred [[parsec]]s in the largest [[elliptical galaxy\|elliptical galaxies]].<ref>{{cite book \|last=Ferrarese \|first=Laura et al. \|editor-first=Vladimir\|editor-last=Karas \| editor2-first=Giorgio \| editor2-last=Matt \|title=Black Holes: from Stars to ~~Galaxies\|publisher=Cambridge University Press \|year=2007 \|pages= 261–268\|chapter=The Inner Workings of Early-Type Galaxies: Cores, Nuclei and Supermassive Black Holes \|isbn=978-0-521-86347-6~~
	~~\| url=http://www.cambridge.org/gb/knowledge/isbn/item1173713/?site_locale=en_GB}}</ref>~~

	It is believed that cores are produced by binary supermassive black holes (SMBHs). Binary SMBHs form during the [[galaxy merger\|merger]] of two galaxies.<ref>{{Citation \| last = Begelman \| first = M. C.\| last2 = et al. \| title = Massive black hole binaries in active galactic nuclei\| journal = Nature\| volume = 287\| issue = \| pages = 307–309\| date = \| year = 1980\| month = \| url = http://adsabs.harvard.edu/abs/1980Natur.287..307B\| doi = 10.1038/287307a0\|bibcode = 1980Natur.287..307B }}</ref> If a star passes near the massive binary, it ~~will be ejected, by~~ a ~~process called the [[gravitational slingshot]]~~. ~~This ejection continues until most of the stars near the center of the galaxy have been removed. The result is~~ a ~~low-density core. Such cores are ubiquitous in giant elliptical galaxies.<ref>{{cite book \|last=Graham \|first=Alister \|editor-first=~~I~~. S.~~ ''et al.''\|editor-last=McLean \|title=Planets, Stars and Stellar Systems \|publisher=Springer \|year=2012 \|pages= \|chapter=A review of elliptical and disc galaxy structure, and modern scaling laws \|isbn=978-90-481-8817-8}}</ref>

	The mass deficit is defined<ref>{{Citation \| last = Milosavljevic\| first = Milos\| author-link = \| last2 = Merritt \| first2 = David\| author2-link = David Merritt \| last3 = Rest \| first3 = Armin \| last4 = van den Bosch \| first4 = Frank \| title = Galaxy cores as relics of black hole mergers\| journal = Monthly Notices of the Royal Astronomical Society\| volume = 331\| issue = 4\| pages = L51-L55\| date = \| year = 2002\| month = \| url = http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2002.05436.x/full \| doi = 10.1046/j.1365-8711.2002.05436.x\|arxiv = astro-ph/0110185 \|bibcode = 2002MNRAS.331L..51M }}</ref> as the amount of mass that was removed in creating the core. The figure illustrates how mass deficits are measured, using the observed brightness profile of a galaxy.<ref>{{Citation \| last = Graham\| first = Alister \| title = Core Depletion from Coalescing Supermassive Black Holes \| journal = The Astrophysical Journal Letters\| volume = 613 \| issue = 1\| pages = L33-L36\| date = \| year = 2004\| month = \| url = http://iopscience.iop.org/1538-4357/613/1/L33/\| doi = 10.1086/424928 \| bibcode=2004ApJ...613L..33G\|arxiv = astro-ph/0503177 }}</ref> Mathematically, the mass deficit is defined as

	~~<math>~~
	~~M_\mathrm{def} = 4\pi\int_0^{R_c} \left[\rho_i(r) - \rho(r) \right]r^2 dr~~
	~~</math>~~

	~~where ''ρ''<sub>i</sub> is the original density, ''ρ'' is the observed density, and ''R''<sub>c</sub>~~ is the ~~core radius.~~

	Observed mass deficits are typically in the range of one to a few times the mass of the central SMBH,<ref name=DEGN>{{cite book\|last=Merritt\|first=David\|author-link=David Merritt\|title=Dynamics and Evolution of Galactic Nuclei\|year=2013\|publisher=Princeton University Press\|location~~=Princeton, NJ\|isbn=9781400846122\|url=http://openlibrary.org/works/OL16802359W/Dynamics_and_Evolution_of_Galactic_Nuclei}}</ref> and observed core radii are comparable~~ to ~~the [[sphere of influence (astronomy)\|influence radii]] of the central SMBH~~. ~~These properties are consistent with what is predicted in theoretical models of core formation~~ <~~ref~~>~~{{Citation~~
	\| last = Merritt \| first = David \| author-link = David Merritt \| title = Mass Deficits, Stalling Radii, and the Merger Histories of Elliptical Galaxies\| journal = The Astrophysical Journal\| volume = 648 \| issue = \| pages = 976–986\| date = \| year = 2006\| month = \| url = http://iopscience.iop.org/0004-637X/648/2/976/
	~~\| doi = 10.1086/506139 \| bibcode=2006ApJ...648..976M\|arxiv = astro-ph/0603439 }}~~<~~/ref~~> ~~and lend support~~ to ~~the hypothesis that all bright galaxies once contained binary SMBHs at their centers.~~

	~~It is not known whether most galaxies still contain massive binaries, or whether the two black holes have coalesced. Both possibilities are consistent with the presence of mass deficits.~~

	~~== References ==~~
	~~{{reflist\|colwidth=30em}}~~

	~~== External links ==~~
	*Ferrarese, L. and [[David Merritt\|Merritt, D.]] (2002). [http://~~arxiv~~.~~org~~/~~abs~~/~~astro-ph~~/~~0206222 Supermassive Black Holes]. ''Physics World'', June 2002, p~~.~~ 41~~.

	~~[[Category:Astrophysics]]~~
	~~[[Category:Supermassive black holes]~~]

en>David Eppstein: Michel Balinski

2013-11-28T08:00:53Z

Michel Balinski

← Older revision		Revision as of 10:00, 28 November 2013
Line 1:		Line 1:
	~~Research~~ has ~~shown that since~~ the ~~amygdala gives more weight to NEGATIVE~~, ~~painful experiences than positive ones, that in order for~~ a ~~marriage or relationship to last, you must create 4 positive experiences for each negative one~~. ~~Most~~ of the ~~time your dog acts out~~ in ~~destructive ways not because you are gone but because he~~ is ~~bored~~. ~~Anxiety attacks and its debilitating symptoms really do affect~~ a ~~person'~~s ~~life, their work~~, and ~~virtually every part of their day to day life~~. ~~You don't have to suffer from anxiety - cures~~ are ~~easier and faster than you might think~~. ~~To some, these new regulations may seem intrusive, but they were instilled with~~ the ~~best~~ of ~~intentions~~. <br><br>~~The education or Spoken English Courses should certainly include love~~, ~~understanding together with proper care~~. ~~Once you feel~~ the ~~anxiety starting to take hold, play your favorite tunes~~. ~~If you~~ are ~~considering quitting, have a frank discussion with a physician~~. ~~Be able to connect with others also allows you to live a more fulfilled life~~. ~~With a good grasp on this concept~~, ~~you will recognize how a wide variety~~ of ~~internal~~ and ~~external circumstances feed into children's anxiety~~, ~~as well as understand what interventions can reduce their anxiety.~~ <br><br>~~This is the most practical way~~ of ~~eliminating any kind~~ of ~~fear and this works well for anxiety attacks~~. ~~When arranging out~~ the ~~new design~~ of ~~one's residence, it constantly best to become practical~~. ~~There~~ are ~~definite symptoms~~ of ~~anxiety, but there is nothing that will show up on~~ a ~~brain scan~~. ~~There are chemical messengers called neuro transmitters which transmit signals~~ from ~~one brain cell to another cell~~. ~~And next time someone tells you not to hot~~ the ~~panic button, please refer them to this article.~~ <br><br>~~Although there~~ is ~~no evidence that any particular diet can cure anxiety~~, ~~some studies suggest that eating~~ and ~~avoiding particular types of foods may help decrease~~ the ~~number as well as~~ the ~~severity~~ of ~~attacks. At~~ the ~~end~~ of the ~~day~~, ~~have students write a letter to next~~ year~~'s class~~. ~~If you~~ are ~~a person that always feels like they are on "high alert" or consider yourself a "worrier" then there are natural methods~~ to ~~help calm down~~. ~~Each fixed thought that you have solidifies the energy and limits your ability to generate~~ in ~~that area~~ and ~~for something different to show up in your life with ease~~. ~~If you are over~~-~~stressed, this could also cause more attacks for you~~. <br>~~<br>Neurotransmitters travel~~ the ~~nerves of the brain like pathways telling the brain to be happy, sad, anxious~~, or ~~tranquil~~. ~~s childhood and adolescence can also help figure out~~ the ~~cause~~ of ~~anxiety~~. ~~But Yoga is an alternative way to treat anxiety in pregnant woman avoiding the bad effects of medication~~. ~~Anxiety disorders can also be genetic~~ and ~~it is about having a different temperament~~. ~~Social anxiety disorder in children is a problem that is often not recognized~~.~~<br><br>If you cherished this article and you would like to acquire a lot more info regarding~~ [http://~~www~~.~~stress~~-~~lavoro-correlato.info~~/~~sitemap/ how to get rid of panic attacks~~] ~~kindly check out our own website~~.		{{About\|mass deficits in galaxies\|mass deficits in atomic nuclei\|Binding energy}}
			A '''mass deficit''' is the amount of mass (in stars) that has been removed from the center of a [[galaxy]], presumably by the action of a [[binary star\|binary]] [[supermassive black hole]].

			[[File:mdef.jpg\|thumb\|left\|Mass deficit.]]

			The density of stars increases toward the center in most galaxies. In small galaxies, this increase continues into the very center. In large galaxies, there is usually a "core", a region near the center where the density is constant or slowly rising. The size of the core – the "core radius" – can be as great as a few hundred [[parsec]]s in the largest [[elliptical galaxy\|elliptical galaxies]].<ref>{{cite book \|last=Ferrarese \|first=Laura et al. \|editor-first=Vladimir\|editor-last=Karas \| editor2-first=Giorgio \| editor2-last=Matt \|title=Black Holes: from Stars to Galaxies\|publisher=Cambridge University Press \|year=2007 \|pages= 261–268\|chapter=The Inner Workings of Early-Type Galaxies: Cores, Nuclei and Supermassive Black Holes \|isbn=978-0-521-86347-6
			\| url=http://www.cambridge.org/gb/knowledge/isbn/item1173713/?site_locale=en_GB}}</ref>

			It is believed that cores are produced by binary supermassive black holes (SMBHs). Binary SMBHs form during the [[galaxy merger\|merger]] of two galaxies.<ref>{{Citation \| last = Begelman \| first = M. C.\| last2 = et al. \| title = Massive black hole binaries in active galactic nuclei\| journal = Nature\| volume = 287\| issue = \| pages = 307–309\| date = \| year = 1980\| month = \| url = http://adsabs.harvard.edu/abs/1980Natur.287..307B\| doi = 10.1038/287307a0\|bibcode = 1980Natur.287..307B }}</ref> If a star passes near the massive binary, it will be ejected, by a process called the [[gravitational slingshot]]. This ejection continues until most of the stars near the center of the galaxy have been removed. The result is a low-density core. Such cores are ubiquitous in giant elliptical galaxies.<ref>{{cite book \|last=Graham \|first=Alister \|editor-first=I. S. ''et al.''\|editor-last=McLean \|title=Planets, Stars and Stellar Systems \|publisher=Springer \|year=2012 \|pages= \|chapter=A review of elliptical and disc galaxy structure, and modern scaling laws \|isbn=978-90-481-8817-8}}</ref>

			The mass deficit is defined<ref>{{Citation \| last = Milosavljevic\| first = Milos\| author-link = \| last2 = Merritt \| first2 = David\| author2-link = David Merritt \| last3 = Rest \| first3 = Armin \| last4 = van den Bosch \| first4 = Frank \| title = Galaxy cores as relics of black hole mergers\| journal = Monthly Notices of the Royal Astronomical Society\| volume = 331\| issue = 4\| pages = L51-L55\| date = \| year = 2002\| month = \| url = http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2002.05436.x/full \| doi = 10.1046/j.1365-8711.2002.05436.x\|arxiv = astro-ph/0110185 \|bibcode = 2002MNRAS.331L..51M }}</ref> as the amount of mass that was removed in creating the core. The figure illustrates how mass deficits are measured, using the observed brightness profile of a galaxy.<ref>{{Citation \| last = Graham\| first = Alister \| title = Core Depletion from Coalescing Supermassive Black Holes \| journal = The Astrophysical Journal Letters\| volume = 613 \| issue = 1\| pages = L33-L36\| date = \| year = 2004\| month = \| url = http://iopscience.iop.org/1538-4357/613/1/L33/\| doi = 10.1086/424928 \| bibcode=2004ApJ...613L..33G\|arxiv = astro-ph/0503177 }}</ref> Mathematically, the mass deficit is defined as

			<math>
			M_\mathrm{def} = 4\pi\int_0^{R_c} \left[\rho_i(r) - \rho(r) \right]r^2 dr
			</math>

			where ''ρ''<sub>i</sub> is the original density, ''ρ'' is the observed density, and ''R''<sub>c</sub> is the core radius.

			Observed mass deficits are typically in the range of one to a few times the mass of the central SMBH,<ref name=DEGN>{{cite book\|last=Merritt\|first=David\|author-link=David Merritt\|title=Dynamics and Evolution of Galactic Nuclei\|year=2013\|publisher=Princeton University Press\|location=Princeton, NJ\|isbn=9781400846122\|url=http://openlibrary.org/works/OL16802359W/Dynamics_and_Evolution_of_Galactic_Nuclei}}</ref> and observed core radii are comparable to the [[sphere of influence (astronomy)\|influence radii]] of the central SMBH. These properties are consistent with what is predicted in theoretical models of core formation <ref>{{Citation
			\| last = Merritt \| first = David \| author-link = David Merritt \| title = Mass Deficits, Stalling Radii, and the Merger Histories of Elliptical Galaxies\| journal = The Astrophysical Journal\| volume = 648 \| issue = \| pages = 976–986\| date = \| year = 2006\| month = \| url = http://iopscience.iop.org/0004-637X/648/2/976/
			\| doi = 10.1086/506139 \| bibcode=2006ApJ...648..976M\|arxiv = astro-ph/0603439 }}</ref> and lend support to the hypothesis that all bright galaxies once contained binary SMBHs at their centers.

			It is not known whether most galaxies still contain massive binaries, or whether the two black holes have coalesced. Both possibilities are consistent with the presence of mass deficits.

			== References ==
			{{reflist\|colwidth=30em}}

			== External links ==
			*Ferrarese, L. and [[David Merritt\|Merritt, D.]] (2002). [http://arxiv.org/abs/astro-ph/0206222 Supermassive Black Holes]. ''Physics World'', June 2002, p. 41.

			[[Category:Astrophysics]]
			[[Category:Supermassive black holes]]

en>Ken Gallager: /* Penn-Jersey model */ rm ambiguous link - no articles found

2012-08-08T15:25:34Z

Penn-Jersey model: rm ambiguous link - no articles found

New page

Research has shown that since the amygdala gives more weight to NEGATIVE, painful experiences than positive ones, that in order for a marriage or relationship to last, you must create 4 positive experiences for each negative one. Most of the time your dog acts out in destructive ways not because you are gone but because he is bored. Anxiety attacks and its debilitating symptoms really do affect a person's life, their work, and virtually every part of their day to day life. You don't have to suffer from anxiety - cures are easier and faster than you might think. To some, these new regulations may seem intrusive, but they were instilled with the best of intentions. The education or Spoken English Courses should certainly include love, understanding together with proper care. Once you feel the anxiety starting to take hold, play your favorite tunes. If you are considering quitting, have a frank discussion with a physician. Be able to connect with others also allows you to live a more fulfilled life. With a good grasp on this concept, you will recognize how a wide variety of internal and external circumstances feed into children's anxiety, as well as understand what interventions can reduce their anxiety. This is the most practical way of eliminating any kind of fear and this works well for anxiety attacks. When arranging out the new design of one's residence, it constantly best to become practical. There are definite symptoms of anxiety, but there is nothing that will show up on a brain scan. There are chemical messengers called neuro transmitters which transmit signals from one brain cell to another cell. And next time someone tells you not to hot the panic button, please refer them to this article. Although there is no evidence that any particular diet can cure anxiety, some studies suggest that eating and avoiding particular types of foods may help decrease the number as well as the severity of attacks. At the end of the day, have students write a letter to next year's class. If you are a person that always feels like they are on "high alert" or consider yourself a "worrier" then there are natural methods to help calm down. Each fixed thought that you have solidifies the energy and limits your ability to generate in that area and for something different to show up in your life with ease. If you are over-stressed, this could also cause more attacks for you. Neurotransmitters travel the nerves of the brain like pathways telling the brain to be happy, sad, anxious, or tranquil. s childhood and adolescence can also help figure out the cause of anxiety. But Yoga is an alternative way to treat anxiety in pregnant woman avoiding the bad effects of medication. Anxiety disorders can also be genetic and it is about having a different temperament. Social anxiety disorder in children is a problem that is often not recognized. If you cherished this article and you would like to acquire a lot more info regarding [http://www.stress-lavoro-correlato.info/sitemap/ how to get rid of panic attacks] kindly check out our own website.