SklogWiki - User contributions [en]

Sandpit

2011-01-27T11:52:58Z

Lufi:

==Test title==
You can make tests here....
'''test'''
''test 2''

some morte tests zzzzz

more tests
test of recaptcha

<math>\overbrace{ 1+2+\cdots+200 }^{5150} </math>

<math>\iint y^2 dy</math>
<math>\iint y^2 rrrr dy</math>
test of 1.16

*[[/sandpit2| sand 2]]
test2

test 100

According to scientists, the Sun is pretty big.<ref>E. Miller, The Sun, (New York: Academic Press, 2005), 23-5.</ref>
The Moon, however, is not so big.<ref>R. Smith, "Size of the Moon", Scientific American, 46 (April 1978): 44-6.</ref>
<math> \frac{\partial x}{\partial y}</math>

test 3 [[hard sphere model]]
date test

<math>y=nx^2 + mx+c</math>

:::<math>y=nx^8 + mx^4 +c</math>

<math>y=mx+c</math>
==Notes==
<references/>

[edit]
[[category: Miscellaneous]]

MOSSNOHO Workshop 2009

2009-06-15T11:50:54Z

Lufi: correccion de ortografía

[[Image:log_mossnoho1.gif|300px|frameless|right]]
La reunión del Programa de Investigación [http://www.icmm.csic.es/mossnoho/ MOSSNOHO/MODELICO] 2009 se celebrará el día 16 de junio en la [http://www.ucm.es/info/ccquim/ Facultad de Ciencias Químicas] de la [http://www.ucm.es/ Universidad Complutense de Madrid].

Aquí esta el programa '''preliminar'''. Las charlas son de 20 minutos más 10 minutos para preguntas.
==Horario de las charlas==
{| style="width:90%; height:85px" border="3"
|-
|Horario || Ponente || Título de la charla || Institución || Departamento/Grupo de investigación
|-
| 10:00-10:30 || [http://cab.inta.es/03_01_01_curriculum.php?lab_id=&laboratorio=&per_id=30&idioma=ESP Susanna C. Manrubia] || ''Evolución y adaptación de poblaciones moleculares y virales de RNA'' || [http://cab.inta.es/ Centro de Astrobiología] || Grupo de Sistemas Evolutivos
|-
| 10:30-11:00 || José Maria Guil || ''Microcalorimetria de adsorción'' || [http://www.iqfr.csic.es/ CSIC Instituto de Química-Física "Rocasolano"] || [http://www.iqfr.csic.es/electroquimica/Departamento.htm Química-Física de Interfases y Electroquímica]
|-[http://cacharro.quim.ucm.es/
| 11:00-11:30 || [http://www.icmm.csic.es/Teoria/basjav.htm José Antonio Verges] || ''Estadísticas cuánticas del transporte electrónico a través de sistemas desordenados'' || [http://www.icmm.csic.es/ CSIC Instituto de Ciencia de Materiales de Madrid] || [http://www.icmm.csic.es/Teoria/ Condensed Matter Theory]
|-
| 11:30-12:00 || '''Café''' || || ||
|-
| 12:00-12:30 || [http://cacharro.quim.ucm.es/ José Luis F. Abascal] ||''Propiedades anómalas del agua: región líquida y subenfriada'' || [http://www.ucm.es/ Universidad Complutense de Madrid] || [http://www.ucm.es/info/quifi/ Departamento de Química Física I]
|-
| 12:30-13:00 || [http://www.dmae.upm.es/bartolo.html Bartolo Luque] || ''Visibilidad: una nueva herramienta de análisis de series temporales'' || [http://www2.upm.es/institucional Universidad Politécnica de Madrid] || [http://www.dmae.upm.es/ Departamento Matemática Aplicada y Estadística]
|-
| 13:00-13:30 || Alfonso Paez || ''Polímeros vivos de FtsZ en el proceso de división celular'' || [http://www.uam.es/ Universidad Autónoma de Madrid] || [http://www.uam.es/departamentos/ciencias/fisicateoricamateria/propia/fluidos.html Investigación en física estadística de líquidos complejos y biofísica]
|-
| 13:30-14:30 || '''Comida''' || || ||
|-
| 14:30-15:00 || [http://www.qft.iqfr.csic.es/personal/alberto/ Alberto Gallardo] || ''Modelado y simulación de adsorción en arcillas con pilares'' || [http://www.iqfr.csic.es/ CSIC Instituto de Química-Física "Rocasolano" ] || [http://www.qft.iqfr.csic.es/ Grupo de Química Física Teórica]
|-
| 15:00-15:30 || [http://oboe.quim.ucm.es/jfg.html Juan Freire] || ''Investigación de la compatibilidad de mezclas de polímeros y del comportamiento molecular de dendrímeros por simulación numérica'' || [http://www.uned.es/ Universidad Nacional de Educación a Distancia (UNED)] || [http://www.uned.es/dpto-fisicoquimica/index.htm Departamento de Ciencias y Técnicas Fisicoquímicas]
|-
| 15:30-16:00 || [http://emoles.quim.ucm.es/carlos.html Carlos Vega] || ''La importancia de los efectos cuánticos en el agua'' || [http://www.ucm.es/ Universidad Complutense de Madrid] || [http://emoles.quim.ucm.es/ Termodinámica Estadística de Fluidos Moleculares]
|-
| 16:00-16:30 || '''Café''' || || ||
|-
| 16:30-17:00 || [http://www.uam.es/personal_pdi/ciencias/rdelgado/ Rafael Delagado Buscalioni] || ''Estructura e hidrodinámica de [[Capillary_waves| ondas capilares]] nanoscópicas'' || [http://www.uam.es/ Universidad Autónoma de Madrid] || [http://www.uam.es/departamentos/ciencias/fisicateoricamateria/propia/ Departamento de Física Teórica de la Materia Condensada]
|-
| 17:00-17:30 || [http://www.uc3m.es/portal/page/portal/dpto_matematicas/profesorado/Jos%E9%20%C1ngel%20Capit%E1n José A. Capitán] || ''Cuasiecosistemas y la catástrofe de extinción'' || [http://www.uc3m.es/portal/page/portal/inicio Universidad Carlos III de Madrid] || [http://gisc.uc3m.es Grupo Interdisciplinar de Sistemas Complejos]
|-
| 17:30-18:00 || [http://www.iem.csic.es/fmacro/fismacr_doc/fismacr_bio/tiberio.htm Tiberio Ezquerra] || ''Estructura y Dinámica de la Materia Condesada Blanda y Polimérica: Actividad del grupo SOFMAT'' || [http://www.iem.csic.es/ CSIC Instituto de Estructura de la Materia] || [http://www.iem.cfmac.csic.es/fmacro/softmatpol/ Soft and Polymeric Condensed Matter Group]
|-
| 18:00-18:30 || [http://www.complex.etsit.urjc.es/jmbuldu/ Javier Martín Buldú] || ''Competición de dominios de sincronización en redes complejas y detección dinámica de interfaces'' || [http://www.urjc.es/ Universidad Rey Juan Carlos] || [http://www.complex.etsit.urjc.es/ Complex Systems Group]
|}

==Como llegar==
La [http://www.ucm.es/info/ccquim/ Facultad de Ciencias Químicas] se encuentra situada en el Campus de Moncloa de la UCM. [http://www.ucm.es/info/ccquim/pags.php?p=5 Mapa].
El workshop tendrá lugar en el salón de actos situado en el sotano del la biblioteca:
[[Image:UCM_salon_biblio.png|400px|frameless|center]]

[[Image:logo_sumaeducmadrid-org.jpg|300px|frameless|center]]

Entropy of ice phases

2009-06-04T17:12:50Z

Lufi: /* Ice rules references added*/

{{Stub-water}}
==Ice rules==
Or the Bernal-Fowler rules<ref>[J. D. bernal and R. H. Fowler, J. Chem. Phys. 1, 515 (1933)]</ref>,
give us how the hydrogen atoms are distributed in the ices. Each oxygen atom has two hydrogen atoms attached
to it at a distance about 1 amstrong, and one hydrogen atom resides on each O-O bond. There are
many ways to distribute the protons such that these rules are satisfied and all are equally probable.
The ice with this random distribution must have null dipole moment.
For this reason, the residual entropy of ice is correctly predicted. The observed residual entropy
was descibed, for the first time, by the statistical model for ice Ih introduced by Pauling
<ref>[Linus Pauling "The Structure and Entropy of Ice and of Other Crystals with Some Randomness of Atomic Arrangement", Journal of the American Chemical Society 57 pp. 2680–2684 (1935)]</ref>. Who suggested a random arrangement of protons. By means
of a simple calculation, Pauling showed that the resulting disordered phase requires the addition of
a combinatorial entropy -NKB ln 3/2 to the teorical estimate. This finding demostrated that a crystal
phase such as ice Ih could show full disorder at 0 K (against prediction from the third principe).

==References==
#[J. D. bernal and R. H. Fowler, J. Chem. Phys. 1, 515 (1933)]
#[http://dx.doi.org/10.1021/ja01315a102 Linus Pauling "The Structure and Entropy of Ice and of Other Crystals with Some Randomness of Atomic Arrangement", Journal of the American Chemical Society '''57''' pp. 2680–2684 (1935)]
#[http://dx.doi.org/10.1063/1.1725363 E. A. DiMarzio and F. H. Stillinger, Jr. "Residual Entropy of Ice", Journal of Chemical Physics '''40''' 1577 (1964)]
#[http://dx.doi.org/10.1063/1.1705058 J. F. Nagle "Lattice Statistics of Hydrogen Bonded Crystals. I. The Residual Entropy of Ice", Journal of Mathematical Physics '''7''' 1484 (1966)]
#[http://dx.doi.org/10.1063/1.452433 Rachel Howe and R. W. Whitworth "The configurational entropy of partially ordered ice", Journal of Chemical Physics '''86''' pp. 6443-6445 (1987)]
#[http://dx.doi.org/10.1063/1.453743 Rachel Howe and R. W. Whitworth "Erratum: The configurational entropy of partially ordered ice <nowiki>[J. Chem. Phys. 86, 6443 (1987)]</nowiki>", Journal of Chemical Physics '''87''' p. 6212 (1987)]
#[http://dx.doi.org/10.1063/1.1808693 Luis G. MacDowell, Eduardo Sanz, Carlos Vega, and José Luis F. Abascal "Combinatorial entropy and phase diagram of partially ordered ice phases", Journal of Chemical Physics '''121''' pp. 10145-10158 (2004)]
#[http://dx.doi.org/10.1063/1.2800002 Bernd A. Berg and Wei Yang "Numerical calculation of the combinatorial entropy of partially ordered ice", Journal of Chemical Physics '''127''' 224502 (2007)]
[[category: water]]

Entropy of ice phases

2009-06-04T17:10:54Z

Lufi: /* Ice rules */

{{Stub-water}}
==Ice rules==
Or the Bernal-Fowler rules<ref>[J. D. bernal and R. H. Fowler, J. Chem. Phys. 1, 515 (1933)]</ref>,
give us how the hydrogen atoms are distributed in the ices. Each oxygen atom has two hydrogen atoms attached
to it at a distance about 1 amstrong, and one hydrogen atom resides on each O-O bond. There are
many ways to distribute the protons such that these rules are satisfied and all are equally probable.
The ice with this random distribution must have null dipole moment.
For this reason, the residual entropy of ice is correctly predicted. The observed residual entropy
was descibed, for the first time, by the statistical model for ice Ih introduced by Pauling
<ref>[Linus Pauling "The Structure and Entropy of Ice and of Other Crystals with Some Randomness of Atomic Arrangement", Journal of the American Chemical Society 57 pp. 2680–2684 (1935)]</ref>. Who suggested a random arrangement of protons. By means
of a simple calculation, Pauling showed that the resulting disordered phase requires the addition of
a combinatorial entropy -NKB ln 3/2 to the teorical estimate. This finding demostrated that a crystal
phase such as ice Ih could show full disorder at 0 K (against prediction from the third principe).

==References==
#[http://dx.doi.org/10.1021/ja01315a102 Linus Pauling "The Structure and Entropy of Ice and of Other Crystals with Some Randomness of Atomic Arrangement", Journal of the American Chemical Society '''57''' pp. 2680–2684 (1935)]
#[http://dx.doi.org/10.1063/1.1725363 E. A. DiMarzio and F. H. Stillinger, Jr. "Residual Entropy of Ice", Journal of Chemical Physics '''40''' 1577 (1964)]
#[http://dx.doi.org/10.1063/1.1705058 J. F. Nagle "Lattice Statistics of Hydrogen Bonded Crystals. I. The Residual Entropy of Ice", Journal of Mathematical Physics '''7''' 1484 (1966)]
#[http://dx.doi.org/10.1063/1.452433 Rachel Howe and R. W. Whitworth "The configurational entropy of partially ordered ice", Journal of Chemical Physics '''86''' pp. 6443-6445 (1987)]
#[http://dx.doi.org/10.1063/1.453743 Rachel Howe and R. W. Whitworth "Erratum: The configurational entropy of partially ordered ice <nowiki>[J. Chem. Phys. 86, 6443 (1987)]</nowiki>", Journal of Chemical Physics '''87''' p. 6212 (1987)]
#[http://dx.doi.org/10.1063/1.1808693 Luis G. MacDowell, Eduardo Sanz, Carlos Vega, and José Luis F. Abascal "Combinatorial entropy and phase diagram of partially ordered ice phases", Journal of Chemical Physics '''121''' pp. 10145-10158 (2004)]
#[http://dx.doi.org/10.1063/1.2800002 Bernd A. Berg and Wei Yang "Numerical calculation of the combinatorial entropy of partially ordered ice", Journal of Chemical Physics '''127''' 224502 (2007)]
[[category: water]]

Ice XV

2009-04-02T10:03:40Z

Lufi: Ice XV discussion

{{Stub-water}}
Fourteen different polymorphs of water are experimentally known. However,
the search of new solid phases are a very active investigation area.
Two main routes exist. The first one is the search (at low temperatures)
of proton ordered analogous of the high temperature proton disordered ices.
This is the research that lead to the discovery of ices [[ice VIII]], [[ice IX]], [[ice XI]], [[ice XIII]]
and [[ice XIV]]. [[Ice VI]] being probably the only proton disordered ice for which
the proton ordered ice has not yet been found. Some authors label this
unprepared ice phase as ice XV.
The second route is the search of new ices at high pressure and/or high
temperature. This route is being object of an intensive activity, both
experimental and theorical. Recently, a [[plastic crystal phase of water]]
has been found by molecular simulation for some water potential models
(SPC/E, TIP4P, TIP5P and TIP4P/2005)<ref>[http://www.rsc.org/Publishing/Journals/CP/article.asp?doi=b812834k J.L. Aragones, M.M. Conde, E.G. Noya & C. Vega, Phys. Chem. Chem. Phys., 2009, 11, 543 - 555, DOI: 10.1039/b812834k]</ref>.
This plastic crystal was not also
prepared, but the authors has labelled it as ice XV.
The phases of ice have been labelled with the Roman numerals I-XIV in the
approximate order in which they were produced experimentally. Therefore,
we have to wait for which of these phases is prepared to know what will
the ice XV.

==References==
<references/>
'''Related publications'''
*[http://www.nature.com/nature/journal/v397/n6719/full/397503a0.html Paul Loubeyre, René LeToullec, Elodie Wolanin, Michel Hanfland & Daniel Hausermann, Nature 397, 503-506 (1999)]
* [http://prola.aps.org/abstract/PRL/v76/i16/p2934_1 M. Benoit, M. Bernasconi, P. Focher, and M. Parrinello, Phys. Rev. Lett. 76, 2934 - 2936 (1996)]
* [http://www.informaworld.com/smpp/content~content=a903069904~db=all~order=page Beate Schwager & Reinhard Boehler, High Pressure Research 28, 431 (2008)]

Ice XV

2009-04-02T09:50:27Z

Lufi: New page: {{Stub-water}} Fourteen different polymorphs of water are experimentally known. However, the search of new solid phases are a very active investigation area. Two main routes exist. The fir...

{{Stub-water}}
Fourteen different polymorphs of water are experimentally known. However,
the search of new solid phases are a very active investigation area.
Two main routes exist. The first one is the search (at low temperatures)
of proton ordered analogous of the high temperature proton disordered ices.
This is the research that lead to the discovery of ices [[ice VIII]], [[ice IX]], [[ice XI]], [[ice XIII]]
and [[ice XIV]]. [[Ice VI]] being probably the only proton disordered ice for which
the proton ordered ice has not yet been found. Some authors label this
unprepared ice phase as ice XV.
The second route is the search of new ices at high pressure and/or high
temperature. This route is being object of an intensive activity, both
experimental and theorical. Recently, a [[plastic crystal phase of water]]
has been found by molecular simulation for some water potential models
(SPC/E, TIP4P, TIP5P and TIP4P/2005)<ref>[http://www.rsc.org/Publishing/Journals/CP/article.asp?doi=b812834k Phys. Chem. Chem. Phys., 2009, 11, 543 - 555, DOI: 10.1039/b812834k]</ref>.
This plastic crystal was not also
prepared, but the authors has labelled it as ice XV.
The phases of ice have been labelled with the Roman numerals I-XIV in the
approximate order in which they were produced experimentally. Therefore,
we have to wait for which of these phases is prepared to know what will
the ice XV.

==References==
<references/>
'''Related publications'''

Ice phases

2009-03-30T16:39:35Z

Lufi: Ice XV added

*[[Ice Ih]] (hexagonal ice)
*[[Ice Ic]] (cubic ice)
*[[Ice II]]
*[[Ice III]]
*[[Ice IV]]
*[[Ice V]]
*[[Ice VI]]
*[[Ice VII]]
*[[Ice VIII]]
*[[Ice IX]]
*[[Ice X]]
*[[Ice XI]]
*[[Ice XII]]
*[[Ice XIII]]
*[[Ice XIV]]
*[[Ice XV]]
*[[Low density amorphous ice]]
*[[High density amorphous ice]]
*[[Nano-ice]]
*[[Very high density amorphous ice]]
*[[Entropy of ice phases]]
==Interesting reading==
*[http://dx.doi.org/10.1063/1.2169444 Robert Rosenberg "Why Is Ice Slippery?", Physics Today December pp. 50-55 (2005)]
*[http://jphyscol.journaldephysique.org/index.php?option=toc&url=/articles/jphyscol/abs/1987/01/contents/contents.html "VIIth Symposium on the Physics and Chemistry of Ice", Le Journal de Physique Colloques '''48''' No. C1 (1987)]

==General reading==
*[http://www.oup.com/us/catalog/general/subject/Physics/MaterialsScience/?view=usa&ci=9780198518945 Victor F. Petrenko and Robert W. Whitworth "Physics of Ice", Oxford University Press (2002)]

[[Category: Water]]