cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scalar-Isovector Delta-Meson in the Relativistic Mean-Field Theory and the Structure of Neutron Stars with a Quark Core
Creators: name: Alaverdyan, Grigor
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the framework of the relativistic mean-field theory, we have considered the equation of state of superdense nuclear matter, taking into account an effective scalar-isovector delta-meson field. The effect of the delta-meson field on the characteristics of a Maxwell-type quark phase transition has been studied. The quark phase is described with the aid of the improved version of the MIT (Massachusetts Institute of Technology) bag model, in which interactions between the u, d, s quarks inside the bag are taken into account in the one-gluon exchange approximation. For different values of the bag parameter B, series of neutron star models with a quark core have been built. Stability problems for neutron stars with an infinitesimal quark core are discussed. An estimate is obtained for the amount of energy released in a catastrophic transformation of a critical neutron star to a star with a finite-size quark core.
description: 7 pages, 2 figures, Talk given at the International Conference RUSGRAV-13, June 23-28, 2008, PFUR, Moscow
Lattice defects and boundaries in conducting carbon nanotubes
Creators: name: Reyes, Sebastian A.
name: Struck, Alexander
name: Eggert, Sebastian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the effect of various defects and boundary structures on the low energy electronic properties in conducting zigzag and armchair carbon nanotubes. The tight binding model of the conduction bands is mapped exactly onto simple lattice models consisting of two uncoupled parallel chains. Imperfections such as impurities, structural defects or caps can be easily included into the effective lattice models, allowing a detailed physical interpretation of their consequences. The method is quite general and can be used to study a wide range of possible imperfections in carbon nanotubes. We obtain the electron density patterns expected from a scanning tunneling microscopy experiment for half fullerene caps and two typical impurities in the bulk of a tube, namely the Stone-Wales defect and a single vacancy.
description: 15 pages and 16 figures. The latest version can be found at http://www.physik.uni-kl.de/eggert/papers/index.html
Minisatelliti alla riscossa
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Prendete dei piccoli satelliti modulari delle dimensioni di 10 centimetri di lato, equipaggiateli con il nuovo motore a ioni denominato CAT e otterrete delle sonde 'tascabili' in grado di raggiungere e studiare anche Giove e le sue lune. E' questa l'idea di un team di ricercatori dell'Università del Michigan che potrebbe abbattere drasticamente i costi di alcune missioni spaziali automatiche.
Rational group ring elements with kernels having irrational dimension
Creators: name: Austin, Tim
Publisher: name: arXiv
Year: 2009
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 20F65 (Primary), 58J22, 05C25 (Secondary)

description: We prove that there are examples of finitely generated groups G together with group ring elements Q \in \bbQ G for which the von Neumann dimension \dim_{LG}\ker Q is irrational, so (in conjunction with other known results) answering a question of Atiyah.
description: 35 pages, 1 figure; [TDA 3/12/13:] Updated version incorporating referee's suggestions
title: Ð¥Ð°ÑÐ°ÐºÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ñ Ð¾Ð±ÑÐµÐ¼Ð½ÑÑ Ð¸ ÑÐ¾Ð½ÐºÐ¾Ð¿Ð»ÐµÐ½Ð¾ÑÐ½ÑÑ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð² Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð´Ð¸ÑÑÐ°ÐºÑÐ¾Ð¼ÐµÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ SuperNova
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÐ°Ð½Ð¶Ð°, ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
name: Ð£Ð´Ð¾Ð²ÐµÐ½ÐºÐ¾, Ð¡ÑÐ°Ð½Ð¸ÑÐ»Ð°Ð²
name: ÐÐ°ÐºÑÐ»ÐµÐ½ÐºÐ¾, ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
name: ÐÐ½ÑÐ·ÐµÐ²Ð°, ÐÐ°ÑÐ¸Ñ
name: ÐÑÑÐºÐ¾Ð²ÑÐºÐ¸Ð¹, Ð Ð¾Ð¼Ð°Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÐÐ¸ÑÑÐ°ÐºÑÐ¸Ñ
Ð ÐµÐ½ÑÐ³ÐµÐ½Ð¾ÑÑÑÑÐºÑÑÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð·
ÐÑÐ¸ÑÑÐ°Ð»Ð»Ñ
ÐÐ»ÐµÐ½ÐºÐ¸

description: Ð Ð¿Ð¾ÑÐ¾Ð±Ð¸Ð¸ Ð¿ÑÐ¸Ð²ÐµÐ´ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐ¾ÑÐ¼ÑÐ»Ñ ÐºÐ¸Ð½ÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐµÐ¾ÑÐ¸Ð¸ ÑÐµÐ½ÑÐ³ÐµÐ½Ð¾Ð²ÑÐºÐ¾Ð¹ Ð´Ð¸ÑÑÐ°ÐºÑÐ¸Ð¸, Ð¾Ð±ÑÑÑÐ½ÐµÐ½Ð° Ð¾ÑÐ½Ð¾Ð²Ð½Ð°Ñ Ð³ÑÐ°ÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÑÐµÐ¼Ð° Ð´Ð»Ñ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ ÑÑÐ»Ð¾Ð²Ð¸Ð¹ Ð¾ÑÑÐ°Ð¶ÐµÐ½Ð¸Ñ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ Ð¾Ñ ÐºÑÐ¸ÑÑÐ°Ð»Ð»Ð¾Ð², Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° Ð´Ð¸ÑÑÐ°ÐºÑÐ¾Ð¼ÐµÑÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÐ¸ÑÑÐµÐ¼Ð° SuperNova Ð¸ Ð¿Ð¾Ð´ÑÐ¾Ð´Ñ Ðº ÑÐ°Ð±Ð¾ÑÐµ Ñ Ð½ÐµÐ¹ Ð¿ÑÐ¸ Ð¿Ð¾Ð¼Ð¾ÑÐ¸ ÑÑÐ°Ð½Ð´Ð°ÑÑÐ½Ð¾Ð³Ð¾ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ð³Ð¾ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ñ. ÐÐ·Ð»Ð¾Ð¶ÐµÐ½Ñ Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¸Ðµ Ð½Ð°ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¿Ð¾ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð´Ð»Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ð¸ Ð¾Ð±ÑÐµÐ¼Ð½ÑÑ Ð¸ ÑÐ¾Ð½ÐºÐ¾Ð¿Ð»ÐµÐ½Ð¾ÑÐ½ÑÑ Ð¾Ð±ÑÐ°Ð·ÑÐ¾Ð². Ð£Ð´ÐµÐ»ÐµÐ½Ð¾ Ð²Ð½Ð¸Ð¼Ð°Ð½Ð¸Ðµ Ð½ÐµÑÑÐ°Ð½Ð´Ð°ÑÑÐ½ÑÐ¼ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¼ ÑÑÐµÐ´ÑÑÐ²Ð°Ð¼ Ð¸ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð°Ð¼, Ð¿ÑÐ¸ Ð¿Ð¾Ð¼Ð¾ÑÐ¸ ÐºÐ¾ÑÐ¾ÑÑÑ ÑÐ´Ð°ÐµÑÑÑ ÑÐ°ÑÑÐ¸ÑÐ¸ÑÑ ÑÐ¿ÐµÐºÑÑ ÑÐµÑÐ°ÐµÐ¼ÑÑ Ð·Ð°Ð´Ð°Ñ Ð¿Ð¾ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ñ Ñ ÑÐµÐ¼Ð¸, Ð½Ð° ÐºÐ¾ÑÐ¾ÑÑÐµ Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÑÐµÑÑÑ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÐµÐ»Ñ ÑÐ°ÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼. Ð£ÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð²ÑÑÑÐ¸Ñ ÑÑÐµÐ±Ð½ÑÑ Ð·Ð°Ð²ÐµÐ´ÐµÐ½Ð¸Ð¹, Ð¾Ð±ÑÑÐ°ÑÑÐ¸ÑÑÑ Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÐ¼ Â«Ð¢ÐµÑÐ½Ð¸ÑÐµÑÐºÐ°Ñ ÑÐ¸Ð·Ð¸ÐºÐ°Â», Ð° ÑÐ°ÐºÐ¶Ðµ Ð¿Ð¾ Ð´ÑÑÐ³Ð¸Ð¼ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÐ¼, Ð² ÑÑÐµÐ±Ð½ÑÑ Ð¿Ð»Ð°Ð½Ð°Ñ ÐºÐ¾ÑÐ¾ÑÑÑ Ð¿ÑÐµÐ´ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð¸Ð·ÑÑÐµÐ½Ð¸Ðµ ÑÐ²ÐµÑÐ´ÑÑ ÑÐµÐ» Ð¿ÑÐ¸ Ð¿Ð¾Ð¼Ð¾ÑÐ¸ ÑÐµÐ½ÑÐ³ÐµÐ½Ð¾Ð²ÑÐºÐ¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð². ÐÐ°ÑÐµÑÐ¸Ð°Ð»Ñ ÑÑÐµÐ±Ð½Ð¾Ð³Ð¾ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ñ Ð¼Ð¾Ð³ÑÑ Ð±ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ñ Ð¿ÑÐ¸ Ð¸Ð·ÑÑÐµÐ½Ð¸Ð¸ ÐºÑÑÑÐ° Â«Ð­ÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐµ Ð¼ÐµÑÐ¾Ð´Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸ÑÂ» ÑÑÑÐ´ÐµÐ½ÑÐ°Ð¼Ð¸ ÑÑÐ°ÑÑÐ¸Ñ ÐºÑÑÑÐ¾Ð², Ð° ÑÐ°ÐºÐ¶Ðµ Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ°Ð¼Ð¸ Ð¸ Ð½Ð°ÑÑÐ½ÑÐ¼Ð¸ ÑÐ°Ð±Ð¾ÑÐ½Ð¸ÐºÐ°Ð¼Ð¸ Ð¿ÑÐ¸ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ð¸ Ð½Ð°ÑÑÐ½Ð¾-Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÑÐºÐ¸Ñ ÑÐ°Ð±Ð¾Ñ.
The High Angular Resolution Multiplicity of Massive Stars
Creators: name: Mason, Brian D.
name: Hartkopf, William I.
name: Gies, Douglas R.
name: Henry, Todd J.
name: Helsel, John W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observations were made with the KPNO and CTIO 4 m telescopes and USNO speckle camera, and they are sensitive to the detection of binaries in the angular separation regime between 0.03" and 5" with relatively bright companions (Delta V < 3). We report on the discovery of companions to 14 OB stars. In total we resolved companions of 41 of 385 O-stars (11%), 4 of 37 Wolf-Rayet stars (11%), and 89 of 139 B-stars (64%; an enriched visual binary sample that we selected for future orbital determinations). We made a statistical analysis of the binary frequency among the subsample that are listed in the Galactic O Star Catalog by compiling published data on other visual companions detected through adaptive optics studies and/or noted in the Washington Double Star Catalog and by collecting published information on radial velocities and spectroscopic binaries. We find that the binary frequency is much higher among O-stars in clusters and associations compared to the numbers for field and runaway O-stars, consistent with predictions for the ejection processes for runaway stars. We present a first orbit for the O-star Delta Orionis, a linear solution of the close, apparently optical, companion of the O-star Iota Orionis, and an improved orbit of the Be star Delta Scorpii. Finally, we list astrometric data for another 249 resolved and 221 unresolved targets that are lower mass stars that we observed for various other science programs.
description: 76 pages, 6 figures, 11 tables
Il futuro di Copernico
Creators: Caterina Boccato
Publisher: name: Media Inaf
Year: 2013

Quali saranno le nuove frontiere dell’astrofisica, gli strumenti che avremo a disposizione e le future rivoluzioni del sapere? A queste domande si propone di rispondere la serie di incontri ed eventi programmati per questa estate ad Asiago e dedicati al 40esimo anniversario di "Copernico", il più grande telescopio d'Italia.
Una fredda cintura
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2013

L'inconsueto non è trovare cinture di detriti cosmici intorno ad altre stelle, ma trovarne di temperature vicine a -250 gradi Celsius. Lo ha fatto un gruppo di ricercatori guidato dal Alexander Krivov dell'Università di Jena grazie a dati raccolti dal satellite dell'ESA Herschel
title: ÐÐ½ÐµÐ´ÑÐµÐ½Ð¸Ðµ âCRMâ-ÑÐ¸ÑÑÐµÐ¼Ñ Ð² ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ñ ÐÐÐ âÐÐ»Ð¸Ð¼Ð°Ñ-Ð¡ÐµÑÐ²Ð¸Ñâ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÑÐ³Ð°ÑÐµÐ², ÐÐ¸ÑÐ°Ð»Ð¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ðµ
ÑÐ¸ÑÑÐµÐ¼Ð°
CRM

description: ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑÑÐ½ÐºÐ° CRM-ÑÐ¸ÑÑÐµÐ¼ Ð±ÑÐ»Ð¸ Ð²ÑÐ´ÐµÐ»ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ CRM-ÑÐ¸ÑÑÐµÐ¼Ñ, ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÐµ Ð´Ð»Ñ Ð¾ÐºÐ¾Ð½Ð½ÑÑ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¹. ÐÑÑÑÑÐ¾ÐµÐ½Ð° ÑÑÐµÐ¼Ð° Ð±Ð¸Ð·Ð½ÐµÑ-Ð¿ÑÐ¾ÑÐµÑÑÐ° Ð¿ÑÐ¾Ð´Ð°Ð¶Ð¸ Ð¸ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ð¹ Ñ ÐºÐ»Ð¸ÐµÐ½ÑÐ°Ð¼Ð¸ Â«ÐºÐ°Ðº ÐµÑÑÑÂ» Ð¸ Â«ÐºÐ°Ðº Ð´Ð¾Ð»Ð¶Ð½Ð¾ Ð±ÑÑÑÂ» Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Ð¸ Ð½Ð¾ÑÐ°ÑÐ¸Ð¸ BPMN. ÐÑÐ»Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÐÐÐ âÐÐ»Ð¸Ð¼Ð°Ñ-ÑÐµÑÐ²Ð¸Ñâ, Ð¾ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸Ð·Ð¾Ð²Ð°Ð½Ð¾ ÑÐµÐºÑÑÐµÐµ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ðµ ÐÐ¢-Ð¸Ð½ÑÑÐ°ÑÑÑÑÐºÑÑÑÑ Ð¸ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ñ ÐÐ¢-ÑÐ»ÑÐ¶Ð±Ñ, ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸Ð¹ Ðº Ð²Ð½ÐµÐ´ÑÑÐµÐ¼Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ðµ, Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ ÑÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÐ½ÐºÐ° CRM- ÑÐ¸ÑÑÐµÐ¼, Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½ Ð²ÑÐ±Ð¾Ñ Ð²Ð½ÐµÐ´ÑÑÐµÐ¼Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ, ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð¿Ð»Ð°Ð½Ð° Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ, Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ CRM- ÑÐ¸ÑÑÐµÐ¼Ñ. ÐÐ½ÐµÐ´ÑÐµÐ½Ð¸Ðµ CRM-ÑÐ¸ÑÑÐµÐ¼Ñ Â«Darwin Pro ÐÐºÐ½Ð°Â» Ð¾ÐºÐ°Ð·Ð°Ð»Ð¾ Ð±Ð¾Ð»ÑÑÐ¾Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ Ð½Ð° ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ðµ ÑÐ¸ÑÐ»Ð° ÐºÐ»Ð¸ÐµÐ½ÑÐ¾Ð² ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸, Ð½Ð° Ð¿ÑÐ¾ÑÐµÑÑ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ Ñ ÐºÐ»Ð¸ÐµÐ½ÑÐ°Ð¼Ð¸, Ð½Ð° ÐºÐ°ÑÐµÑÑÐ²Ð¾ ÑÐ°Ð±Ð¾ÑÑ Ð¼ÐµÐ½ÐµÐ´Ð¶ÐµÑÐ¾Ð² Ð¿Ð¾ Ð¿ÑÐ¾Ð´Ð°Ð¶Ð°Ð¼, ÑÑÐ¾ Ð¿ÑÐ¸Ð²ÐµÐ»Ð¾ Ðº Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÑÐ¸ÑÑÐ¾Ð¹ Ð¿ÑÐ¸Ð±ÑÐ»Ð¸ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸.
La scienza al Ravello Festival
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2013

Si rinnova la partecipazione della Città della Scienza al Ravello Festival, con due incontri, il 24 e il 30 luglio. Il primo vedrà Giovanni Bignami e Cristina Bellon spiegare il futuro ai ragazzi, nel secondo si parlerà del bosone di Higgs con Guido Tonelli e Francesco Conventi
Impact of Obstacles on the Degree of Mobile Ad Hoc Connection Graphs
Creators: name: Aboue-Nze, Cédric Gaël
name: Guinand, Frédéric
name: Pigné, Yoann
Publisher: name: arXiv
Year: 2009
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: What is the impact of obstacles on the graphs of connections between stations in Mobile Ad hoc Networks? In order to answer, at least partially, this question, the first step is to define both an environment with obstacles and a mobility model for the stations in such an environment. The present paper focuses on a new way of considering the mobility within environments with obstacles, while keeping the core ideas of the well-known Random WayPoint mobility model (a.k.a RWP). Based on a mesh-partitioning of the space, we propose a new model called RSP-O-G for which we compute the spatial distribution of stations and analyse how the presence of obstacles impacts this distribution compared to the distribution when no obstacles are present. Coupled with a simple model of radio propagation, and according to the density of stations in the environment, we study the mean degree of the connection graphs corresponding to such mobile ad hoc networks.
Plexiform neurofibroma of parotid gland
Creators: name: ÃIRACI, SALÄ°HA
Publisher: name: EURORAD
Year: 2015
Subjects: subject: Paediatric
subject: MR
subject: Imaging sequences
subject: Neoplasia

description: Clinical History Image Findings Discussion Find Diagnosis Differential Diagnosis
description: male, 12 years
description: Clinical History: A 12 years old boy with NF1 presented with a soft, asymptomatic swelling on his right cheek. The size of mass had increased gradually for four years. There was no history of trauma, infection or surgery. Final Diagnosis: Plexiform neurofibroma of parotid gland
Ground-state properties of few dipolar bosons in a quasi-one-dimensional harmonic trap
Creators: name: Deuretzbacher, Frank
name: Cremon, Jonas C.
name: Reimann, Stephanie M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the ground state of few bosons with repulsive dipole-dipole interaction in a quasi-one-dimensional harmonic trap by means of the exact diagonalization method. Up to three interaction regimes are found depending on the strength of the dipolar interaction and the ratio of transverse to axial oscillator lengths: a regime where the dipolar Bose gas resembles a system of weakly delta-interacting bosons, a second regime where the bosons are fermionized, and a third regime where the bosons form a Wigner crystal. In the first two regimes, the dipole-dipole potential can be replaced by a delta potential. In the crystalline state, the overlap between the localized wave packets is strongly reduced and all the properties of the boson system equal those of its fermionic counterpart. The transition from the Tonks-Girardeau gas to the solidlike state is accompanied by a rapid increase of the interaction energy and a considerable change of the momentum distribution, which we trace back to the different short-range correlations in the two interaction regimes.
description: This arXiv version contains at the end the Erratum to the published version
Una luna di pietra pomice
Creators: Livia Giacomini
Publisher: name: Media Inaf
Year: 2013

Protagonista dell'immagine di oggi  è Iperione, una strana luna di Satuno studiata dalla missione Cassini-Huygens, di cui sappiamo ancora molto poco. Probabilmente è fatta di ghiaccio, ma dopo due diversi flyby nel 2005 e 2010 i suoi misteri rimangono ancora da svelare.
Tau Boo, un pendolo magnetico
Creators: Antonio Marro
Publisher: name: Media Inaf
Year: 2013

Osservato per la prima volta il ciclo magnetico completo di una stella diversa dal Sole. Il campo magnetico della stella Tau Boötis completa un'inversione ogni due anni, probabilmente a causa della sua interazione con un pianeta di massa sei volte quella di Giove.
Terrestrial planet formation in low eccentricity warm-Jupiter systems
Creators: name: Fogg, M. J.
name: Nelson, R. P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We examine the effect of giant planet migration on the formation of inner terrestrial planet systems. We consider situations in which the giant planet halts migration at semi-major axes in the range 0.13 - 1.7 AU due to gas disk dispersal. An N-body code is employed that is linked to a viscous gas disk algorithm capable of simulating: gas loss via accretion onto the central star and photoevaporation; gap formation by the giant planet; type II migration of the giant; optional type I migration of protoplanets; gas drag on planetesimals. We find that most of the inner system planetary building blocks survive the passage of the giant planet, either by being shepherded inward or scattered into exterior orbits. Systems of one or more hot-Earths are predicted to form and remain interior to the giant planet, especially if type II migration has been limited, or where type I migration has affected protoplanetary dynamics. Habitable planets in low eccentricity warm-Jupiter systems appear possible if the giant planet makes a limited incursion into the outer regions of the habitable zone (HZ), or traverses its entire width and ceases migrating at a radial distance of less than half that of the HZ's inner edge. We conclude that Type II migration does not prevent terrestrial planet formation.
description: Accepted for publication in A&A; 18 pages, 12 figures, 2 tables
Via Lattea e Andromeda? Un déjà vu
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2013

Un gruppo di ricerca europeo ha utilizzato la Dinamica Newtoniana Modificata (teoria MOND) per spiegare alcune caratteristiche del Gruppo Locale di galassie senza il contributo della materia oscura. Ne risulta che Via Lattea e Andromeda si potrebbero essere già scontrate 10 miliardi di anni fa.
Stacked Search for Gravitational Waves from the 2006 SGR 1900+14 Storm
Creators: name: LIGO Scientific Collaboration
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking'' the GW data around the times of individual soft-gamma bursts in the storm to enhance sensitivity for models in which multiple bursts are accompanied by GW emission. We assume that variation in the time difference between burst electromagnetic emission and potential burst GW emission is small relative to the GW signal duration, and we time-align GW excess power time-frequency tilings containing individual burst triggers to their corresponding electromagnetic emissions. We use two GW emission models in our search: a fluence-weighted model and a flat (unweighted) model for the most electromagnetically energetic bursts. We find no evidence of GWs associated with either model. Model-dependent GW strain, isotropic GW emission energy E_GW, and γ= E_GW / E_EM upper limits are estimated using a variety of assumed waveforms. The stacking method allows us to set the most stringent model-dependent limits on transient GW strain published to date. We find E_GW upper limit estimates (at a nominal distance of 10 kpc) of between 2x10^45 erg and 6x10^50 erg depending on waveform type. These limits are an order of magnitude lower than upper limits published previously for this storm and overlap with the range of electromagnetic energies emitted in SGR giant flares.
description: 7 pages, 3 figures
Alle falde del Monte Olimpo
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

La ripresa super dettagliata delle pendici del vulcano più grande del Sistema solare ci arriva dalla sonda dell'Agenzia Spaziale Europea in orbita attorno al Pianeta rosso. Tracce di antiche colate laviche e catastrofiche frane sono l'indizio di una passata attività vulcanica assai intensa.
Compactification d'espaces de représentations de groupes de type fini
Creators: name: Parreau, Anne
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: Group Theory (math.GR)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Let $Γ$ be a finitely generated group and $G$ be a noncompact semisimple connected real Lie group with finite center. We consider the space $\mathcal X$ of conjugacy classes of reductive representations of $Γ$ into $G$. We define the {\it translation vector} of an element $g$ in $G$, with values in a Weyl chamber, as a refinement of the translation length in the associated symmetric space. We construct a compactification of $\mathcal X$, induced by the marked translation vector spectrum, generalizing Thurston's compactification of the Teichmüller space. We show that the boundary points are projectivized marked translation vector spectra of actions of $Γ$ on affine buildings with no global fixed point. An analoguous result holds for any reductive group $G$ over a local field.
description: 40 pages
Exploring the spreading layer of GX 9+9 using RXTE and INTEGRAL
Creators: name: Savolainen, P.
name: Hannikainen, D. C.
name: Vilhu, O.
name: Paizis, A.
name: Nevalainen, J.
name: Hakala, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have fitted ~200 RXTE and INTEGRAL spectra of the neutron star LMXB GX 9+9 from 2002-2007 with a model consisting of a disc blackbody and another blackbody representing the spreading layer (SL), i.e. an extended accretion zone on the NS surface as opposed to the more traditional disc-like boundary layer. Contrary to theory, the SL temperature was seen to increase towards low SL luminosities, while the approximate angular extent had a nearly linear luminosity dependency. Comptonization was not required to adequately fit these spectra. Together with the ~70 degree upper bound of inclination implied by the lack of eclipses, the best-fitting normalization of the accretion disc blackbody component implies a distance of ~10 kpc, instead of the usually quoted 5 kpc.
description: 14 pages, 10 figures, accepted for publication in MNRAS
title: ÐÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½Ð¾-ÑÐ¾ÑÐ³Ð¾Ð²Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÐºÐ°ÑÐµ Ð²Ð¾ÑÑÐ¾ÑÐ½Ð¾Ð¹ ÐºÑÑ Ð½Ð¸ Ð½Ð° 85 Ð¼ÐµÑÑ Ð²Ð¾ ÐÑÐµÐ²Ð¾Ð»Ð¾Ð¶ÑÐºÐ¾Ð¼ ÑÐ°Ð¹Ð¾Ð½Ðµ ÐÐµÐ½Ð¸Ð½Ð³ÑÐ°Ð´ÑÐºÐ¾Ð¹ Ð¾Ð±Ð»Ð°ÑÑÐ¸
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: Ð£Ð²Ð°ÑÐ¾Ð², Ð¡ÐµÑÐ³ÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: ÐºÐ°ÑÐµ Ð²Ð¾ÑÑÐ¾ÑÐ½Ð¾Ð¹ ÐºÑÑ Ð½Ð¸
Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
Ð¼ÐµÐ½Ñ
ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ°ÑÑÐµÑÑ
ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸

description: ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¾ Ð¼Ð°ÑÐºÐµÑÐ¸Ð½Ð³Ð¾Ð²Ð¾Ðµ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÐºÐ°ÑÐµ Ð²Ð¾ÑÑÐ¾ÑÐ½Ð¾Ð¹ ÐºÑÑÐ½Ð¸, Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ°ÑÑÐµÑÑ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð° Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ Ð¼ÐµÑÐ¾Ð¿ÑÐ¸ÑÑÐ¸Ñ Ð¿Ð¾ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÑÐµÐ¼Ð¾Ð³Ð¾ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ, ÐµÐ³Ð¾ Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð¾ÑÐ½Ð¾Ðµ ÑÐµÑÐµÐ½Ð¸Ðµ Ð¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸.
Che caldo su quegli esopianeti!
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Da un nuovo studio sui pianeti extrasolari emergono dati sulla composizione dell'atmosfera di pianeti gioviani caldi: in alcuni non è stata riscontrata la presenza di ossido di titanio, come invece previsto dai modelli, e su altri è stata invece rilevata un'abbondante quantità di vapore acqueo, che conferma le  teorie sull'importanza di nuvole e vento per il clima degli esopianeti.
Costante, o forse no
Creators: Nicola Nosengo
Publisher: name: Media Inaf
Year: 2013

Un gruppo di ricercatori australiani ha cercato di capire se la costante di struttura fine sia influenzata dalla gravità, studiando lo spettro di una nana bianca. Per ora i risultati non dicono né sì né no, ma avvicinano alla soluzione. Lo studio su Physical Review Letters.
Uno spuntino galattico
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Gli astronomi hanno sempre sospettato che le galassie crescano attirando materia dai dintorni. Grazie al VLT dell'ESO ora è possibile  osservare il fenomeno: una galassia attira gas verso l'interno e questo poi si mette a girarle intorno, ruotando con essa prima di cadere. Lo studio pubblicato su Science.
On the Scope of the Universal-Algebraic Approach to Constraint Satisfaction
Creators: name: Martin, Barnaby
name: Bodirsky, Manuel
name: Hils, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: The universal-algebraic approach has proved a powerful tool in the study of the complexity of CSPs. This approach has previously been applied to the study of CSPs with finite or (infinite) omega-categorical templates, and relies on two facts. The first is that in finite or omega-categorical structures A, a relation is primitive positive definable if and only if it is preserved by the polymorphisms of A. The second is that every finite or omega-categorical structure is homomorphically equivalent to a core structure. In this paper, we present generalizations of these facts to infinite structures that are not necessarily omega-categorical. (This abstract has been severely curtailed by the space constraints of arXiv -- please read the full abstract in the article.) Finally, we present applications of our general results to the description and analysis of the complexity of CSPs. In particular, we give general hardness criteria based on the absence of polymorphisms that depend on more than one argument, and we present a polymorphism-based description of those CSPs that are first-order definable (and therefore can be solved in polynomial time).
description: Extended abstract appeared at 25th Symposium on Logic in Computer Science (LICS 2010). This version will appear in the LMCS special issue associated with LICS 2010
Quei lampi radio lontani lontani
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Brevissimi impulsi nella banda delle onde radio, che hanno viaggiato dalle profondità del cosmo per miliardi di anni, sono stati osservati da un team internazionale di ricercatori, tra cui quattro astrofisici italiani e dell’INAF. Da dove provengono questi segnali? Chi li ha prodotti? Le risposte arriveranno dai futuri programmi di ricerca con nuovi potenti strumenti per la radioastronomia, come il Sardinia Radio Telescope.
The thermal effects of wearing body armour: a systematic review protocol
Creators: name: Palmer, Robert
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Body Armour
subject: Military Research
subject: Tactical Research Unit
subject: Thermal
subject: TRU

description: This systematic review aims to critically appraise the current body of literature on the thermal effects of wearing body armour, and the current methods/interventions used to negate thermo-physiological strain.
Additional file 1 of hUCMSCs reduce theca interstitial cells apoptosis and restore ovarian function in premature ovarian insufficiency rats through regulating NR4A1-mediated mitochondrial mechanisms
Creators: name: Luo, Qianqian
name: Tang, Yu
name: Jiang, Zhonglin
name: Bao, Hongchu
name: Fu, Qiang
name: Zhang, Hongqin
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 1: Figure S1. Identification of human umbilical cord mesenchymal stem cells. Figure S2. TICs morphology and the protein levels of Cyp17a1 and testosterone concentrations by western blot and ELISA. Figure S3. Morphology and GFP-labeled hUCMSCs were observed in the microscope.
Combined Swift BAT-XRT Lightcurves
Creators: name: Veres, P.
name: Bagoly, Z.
name: Kelemen, J.
name: Horvath, I.
name: Balazs, L. G.
name: Meszaros, A.
name: Tusnady, G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we make an attempt to combine the two kinds of data from the Swift-XRT instrument (windowed timing and photon counting modes) and the from BAT. A thorough desription of the applied procedure will be given. We apply various binning techniques to the different data: Bayes blocks, exponential binning and signal-to-noise type of binning. We present a handful of lightcurves and some possible applications.
description: 2008 NANJING GAMMA-RAY BURST CONFERENCE. AIP Conference Proceedings, Volume 1065, pp. 35-38 (2008)
Giovane galassia in controluce
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2013

Una ricerca a partecipazione italiana è riuscita a studiare in dettaglio, grazie alla luce di un quasar retrostante, una galassia formatasi 11 miliardi di anni fa. Dalla composizione chimica risulta che già in quell'epoca primordiale esistevano gli elementi chimici necessari per la formazione di un pianeta come la Terra.
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¹ Ð¿Ð¾ ÑÐ°ÑÑÐ¸ÑÐµÐ½Ð¸Ñ ÑÐµÐ³Ð¼ÐµÐ½ÑÐ° Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»ÐµÐ¹ Ð·Ð°Ð³Ð¾ÑÐ¾Ð´Ð½Ð¾Ð³Ð¾ Ð¾ÑÑÐµÐºÐ»ÐµÐ½Ð¸Ñ Ð´Ð»Ñ ÐÐÐ "ÐÑÐ¸Ð²Ð¸Ð»ÐµÐ³Ð¸Ñ"
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
Creators: name: ÐÑÐ°Ð½Ð°ÑÑÐµÐ²Ð°, ÐÐ°ÑÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÑÐµÐ»ÐµÐ²Ð°Ñ Ð°ÑÐ´Ð¸ÑÐ¾ÑÐ¸Ñ
ÑÐµÐºÐ»Ð°Ð¼Ð°
Ð·Ð°Ð³Ð¾ÑÐ¾Ð´Ð½Ð°Ñ Ð½ÐµÐ´Ð²Ð¸Ð¶Ð¸Ð¼Ð¾ÑÑÑ
Ð¾ÑÑÐµÐºÐ»ÐµÐ½Ð¸Ðµ

description: Ð¦ÐµÐ»ÑÑ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐµÑÑÑ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¹ Ð´Ð»Ñ ÑÐ°ÑÑÐ¸ÑÐµÐ½Ð¸Ñ ÑÐµÐ³Ð¼ÐµÐ½ÑÐ° Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»ÐµÐ¹ Ð·Ð°Ð³Ð¾ÑÐ¾Ð´Ð½Ð¾Ð³Ð¾ Ð¾ÑÑÐµÐºÐ»ÐµÐ½Ð¸Ñ. ÐÐ·ÑÑÐµÐ½Ñ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÐµ Ð²Ð¸Ð´Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹ Ð¸ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½ÑÐµ Ðº Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð¼ÐµÑÐ¾Ð´Ñ. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÐ½ÐºÐ° Ð·Ð°Ð³Ð¾ÑÐ¾Ð´Ð½Ð¾Ð³Ð¾ Ð¾ÑÑÐµÐºÐ»ÐµÐ½Ð¸Ñ, Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° ÑÐµÐ»ÐµÐ²Ð°Ñ Ð°ÑÐ´Ð¸ÑÐ¾ÑÐ¸Ñ.
Il cielo visto da Fermi
Creators: Nicola Nosengo
Publisher: name: Media Inaf
Year: 2013

Pubblicato il catalogo delle sorgenti di raggi gamma oltre i 10 GeV osservate dal Large Area Telescope della missione Fermi. Oltre 500 oggetti, per lo più nuclei galattici attivi o blazar. Questo catalogo servirà a mettere sulla strada giusta il Cherenkov Telescope Array, che lavorerà agli stessi livelli di energia.
The alternative to classical mass renormalization for tube-based self-force calculations
Creators: name: Norton, Andrew H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: To date, classical mass renormalization has been invoked in all tube-based self-force calculations, thus following the method introduced in Dirac's 1938 calculation of the electromagnetic self-force for the classical radiating electron. In this paper a new tube method is described that does not rely on a mass renormalization procedure. As a result, exact self-force calculations become possible for classical radiating systems of finite size. A new derivation of the Lorentz-Dirac equation is given and the relationship between the new tube method and the classical mass renormalization procedure is explained. It is expected that a similar tube method could be used to obtain rigorous results in the gravitational self-force problem.
description: 21 pages, 2 figures. An accompanying Mathematica notebook is available at http://124.178.231.75/sfcalc
Enhanced current quantization in high frequency electron pumps in a perpendicular magnetic field
Creators: name: Wright, S. J.
name: Blumenthal, M. D.
name: Gumbs, Godfrey
name: Thorn, A. L.
name: Pepper, M.
name: Janssen, T. J. B. M.
name: Holmes, S. N.
name: Anderson, D.
name: Jones, G. A. C.
name: Nicoll, C. A.
name: Ritchie, D. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present experimental results of high frequency quantized charge pumping through a quantum dot formed by the electric field arising from applied voltages in a GaAs/AlGaAs system in the presence of a perpendicular magnetic field B. Clear changes are observed in the quantized current plateaus as a function of applied magnetic field. We report on the robustness in the length of the quantized plateaus and improvements in the quantization as a result of the applied B field.
description: 4 pages, 4 figures, accepted for publication in Phys. Rev. B
Un occhio di falco per Gemini
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2013

Un nuovo sistema di ottica adattiva che corregge la distorsione dell'atmosfera dà al telescopio Gemini in Cile la capacità di ottenere immagini molto più ampie e accurate. Le prime sette immagini ottenute con questo sistema sono spettacolari primi piani di ammassi stellari e galassie interagenti.
Quantum mechanics of a constrained electrically charged particle in the presence of electric currents
Creators: name: Jensen, B.
name: Dandoloff, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the dynamics of a classical spinless quantum particle carrying electric charge and constrained to move on a non singular static surface in ordinary three dimensional space in the presence of arbitrary configurations of time independent electric currents. Starting from the canonical action in the embedding space we show that a charged particle with charge $q$ couples to a term linear in $qA^3M$, where $A^3$ is the transverse component of the electromagnetic vector potential and $M$ is the mean curvature in the surface. This term cancels exactly a curvature contribution to the orbital magnetic moment of the particle. It is shown that particles, independently of the value of the charge, in addition to the known couplings to the geometry also couple to the mean curvature in the surface when a Neumann type of constraint is applied on the transverse fluctuations of the wave function. In contrast to a Dirrichlet constraint on the transverse fluctuations a Neumann type of constraint on these degrees of freedom will in general make the equations of motion non separable. The exceptions are the equations of motion for electrically neutral particles on surfaces with constant mean curvature. In the presence of electric currents the equation of motion of a charged particle is generally non separable independently of the coupling to the geometry and the boundary constraints.
description: to appear in Phys.Rev. A
Quantum three-body calculation of the nonresonant triple-αreaction rate at low temperatures
Creators: name: Ogata, Kazuyuki
name: Kan, Masataka
name: Kamimura, Masayasu
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The triple-αreaction rate is re-evaluated by directly solving the three-body Schrödinger equation. The resonant and nonresonant processes are treated on the same footing using the continuum-discretized coupled-channels method for three-body scattering. Accurate description of the α-αnonresonant states significantly quenches the Coulomb barrier between the two-α's and the third αparticle. Consequently, the α-αnonresonant continuum states below the resonance at 92.04 keV, i.e., the ground state of 8Be, give markedly larger contribution at low temperatures than in foregoing studies. We show that Nomoto's method for three-body nonresonant capture processes, which is adopted in the NACRE compilation and many other studies, is a crude approximation of the accurate quantum three-body model calculation. We find about 20 orders-of-magnitude enhancement of the triple-αreaction rate around 10^7 K compared to the rate of NACRE.
description: To be published in Prog. Theor. Phys. Vol.121, No.4. More detailed description of numerical inputs, further discussion in relation to Nomoto's method (NACRE), new typeset using PTP TeX
Due gemelle inseparabili
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Le due galassie GC 9074 e PGC 9071 si trovano nella costellazione del Triangolo e hanno da poco iniziato a interagire gravitazionalmente. Finiranno per fondersi tra centinaia di milioni di anni. Entrambe sono galassie a spirale, ma con strutture leggermente diverse.
title: Ð ÐµÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ ÑÑÑÐ´ÐµÐ½ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ¿Ð¾ÑÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑÐ°
title: Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð½ÑÐ¹ Ð¿ÑÐ¾ÐµÐºÑ
titleType: Subtitle
Creators: name: ÐÑÐ¸Ð¼Ð¾Ð², ÐÐ²Ð³ÐµÐ½Ð¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2016
Subjects: ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¸Ð½Ð²ÐµÑÑÐ¸ÑÐ¸Ð¾Ð½Ð½Ð¾-ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÐ½ÑÐ¼Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸
ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÑÑÐ¾ÐºÐ¾Ð² Ð¿ÑÐ¾ÐµÐºÑÐ°
ÑÐ°ÑÐ¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÐµÐºÑÐ°
ÑÐµÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ
management of investment construction projects
control project timelines
project schedule
reconstruction

description: Ð ÐµÐºÐ¾Ð½ÑÑÑÑÐ¸ÑÑÐµÐ¼Ð¾Ðµ Ð·Ð´Ð°Ð½Ð¸Ðµ ÑÐ°ÑÐ¿Ð¾Ð»Ð°Ð³Ð°ÐµÑÑÑ Ð½Ð° ÑÐµÐ²ÐµÑÐµ Ð³Ð¾ÑÐ¾Ð´Ð° Ð¿Ð¾ Ð°Ð´ÑÐµÑÑ: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³, ÐÐ°Ð»Ð¸Ð½Ð¸Ð½ÑÐºÐ¸Ð¹ ÑÐ°Ð¹Ð¾Ð½, ÑÐ»Ð¸ÑÐ° ÐÐ¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ°Ñ, Ð´Ð¾Ð¼ 27. ÐÐµÑÑÑÐ¸Ðµ ÑÑÐµÐ½Ñ - ÐºÐ¸ÑÐ¿Ð¸ÑÐ½ÑÐµ (ÑÐ¾Ð»ÑÐ¸Ð½Ð° ÑÑÐµÐ½ 630 Ð¼Ð¼). ÐÐ°ÑÐºÐ°Ñ ÐºÑÐ¾Ð²Ð»Ð¸ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½ Ð¸Ð· LVL Ð±ÑÑÑÐ°. ÐÐ¾ÐºÑÑÑÐ¸Ðµ ÐºÑÐ¾Ð²Ð»Ð¸ - Ð¼ÐµÐ¼Ð±ÑÐ°Ð½Ð°. Ð¤Ð°ÑÐ°Ð´ - ÑÑÐµÐ¿Ð»ÐµÐ½Ð½ÑÐ¹, Ð²ÐµÐ½ÑÐ¸Ð»Ð¸ÑÑÐµÐ¼ÑÐ¹.
description: The reconstructed building is located on the North of the city at the address: St.-Petersburg, Kalininsky district, street Polytechnic, 27. Load - bearing walls- brick (wall thickness 630 mm). A frame made of timber made of the roof of LVL. Roofing membrane. Facade - heat-insulated, ventilated.
Giant malignant phyllodes tumor of the breast
Creators: name: LÃ³pez Soriano, Elsa
Publisher: name: EURORAD
Year: 2015
Subjects: subject: Breast
subject: Mammography
subject: Percutaneous
subject: Ultrasound
subject: Biopsy
subject: Comparative studies
subject: Neoplasia

description: Clinical History Image Findings Discussion Find Diagnosis Differential Diagnosis
description: female, 54 years
description: Clinical History: 54 year old woman. She noted a big mass on her left breast growing rapidly in recent months. No pain or nipple discharge were referred. No axillary adenopathies were detected. Final Diagnosis: Malignant phyllodes tumor
L’ANVUR presenta le pagelle
Creators: Francesco Rea
Publisher: name: Media Inaf
Year: 2013

Il prossimo 16 luglio l'ANVUR presenterà il suo primo rapporto di valutazione su università e enti di ricerca. Lo ha annunciato lo stesso ministro dell'Istruzione, Università e Ricerca, Maria Chiara Carrozza, con un tweet. Costituito nel 2007 ma reso operativo solo a metà del 2010, l'ANVUR ha provocato parecchie polemiche per la scelta dei criteri di valutazione
Observation of a first-order phase transition deep within the vortex-solid region of YBa2Cu3O7
Creators: name: Reibelt, M.
name: Weyeneth, S.
name: Erb, A.
name: Schilling, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have investigated the magnetic phase diagram of a fully oxygenated detwinned YBa2Cu3O7 single crystal by means of magneto-caloric and magnetization measurements, and found thermodynamic evidence for a temperature dependent first-order phase-transition line deep within the vortex-solid region. The associated discontinuities in the entropy are apparently proportional to the magnetic flux density, which may hint at a structural transition of the vortex lattice.
title: ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ° Ð¸ Ð¾ÑÐ½Ð°ÑÑÐºÐ¸ Ð´Ð»Ñ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ Ð´ÐµÑÐ°Ð»Ð¸ Â«ÐÐ°Ð» ÑÐµÐ´ÑÐºÑÐ¾ÑÐ°Â»
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ¼ÐµÐ»Ð¸Ð½, ÐÐ½Ð´ÑÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ñ
Ð¼Ð°ÑÑÑÑÑÐ½Ð°Ñ ÐºÐ°ÑÑÐ°
ÑÐ¸Ð»Ð¾Ð²Ð¾Ð¹ ÑÐ°ÑÑÐµÑ
ÑÐ¾ÑÑÐ°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
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description: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¿ÑÐ¾ÑÐµÑÑ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ Ð´ÐµÑÐ°Ð»Ð¸ Â«ÐÐ°Ð» ÑÐµÐ´ÑÐºÑÐ¾ÑÐ°Â», ÑÐµÑÑÐµÐ¶Ð¸ Ð´ÐµÑÐ°Ð»Ð¸ Ð¸ Ð·Ð°Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ Ð¸ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ñ Ð½Ð°Ð½ÐµÑÐµÐ½Ð¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ñ Ð¥Ð¸Ð¼. Ð¤Ð¾Ñ. ÐÑÐ¼. ÐÐ¾Ð´Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð´Ð¾ÐºÑÐ¼ÐµÐ½ÑÐ°ÑÐ¸Ð¸ Ð¸ Ð²ÑÐ±ÑÐ°Ð½Ð° ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ° Ð´Ð»Ñ Ð½Ð°Ð½ÐµÑÐµÐ½Ð¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ñ. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¸ÑÐ¿Ð¾ÑÐ¾Ð±Ð»ÐµÐ½Ð¸Ñ Ð´Ð»Ñ Ð·Ð°ÐºÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ Ð·Ð°Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ Ð½Ð° Ð²ÐµÑÑÐ¸ÐºÐ°Ð»ÑÐ½Ð¾-ÑÑÐµÐ·ÐµÑÐ½Ð¾Ð¹ Ð¾Ð¿ÐµÑÐ°ÑÐ¸Ð¸ Ð¸ Ð¿Ð¾Ð´Ð²ÐµÑÐºÐ¸ Ð´Ð»Ñ Ð½Ð°Ð½ÐµÑÐµÐ½Ð¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ñ, Ð¿ÑÐ¸Ð²ÐµÐ´ÐµÐ½Ñ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½ÑÐµ ÑÐµÑÑÐµÐ¶Ð¸.
First analytic correction beyond PFA for the electromagnetic field in sphere-plane geometry
Creators: name: Bordag, M.
name: Nikolaev, V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the vacuum energy for a configuration of a sphere in front of a plane, both obeying conductor boundary condition, at small separation. For the separation becoming small we derive the first next-to-leading order of the asymptotic expansion in the separation-to-radius ratio $\ep$. This correction is of order $\ep$. In opposite to the scalar cases it contains also contributions proportional to logarithms in first and second order, $\ep \ln \ep$ and $\ep (\ln \ep)^2$. We compare this result with the available findings of numerical and experimental approaches.
description: 20 pages, 1 figure
L’astronomia russa guarda all’Italia
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2013

Il possibile futuro prossimo è la collaborazione su un satellite scientifico di astrofisica. E' quanto emerso dai colloqui avuti a Mosca dal presidente dell'INAF, Giovanni Bignami che e' stato insignito del titolo di professore honoris causa dall'Università statale Lomonosov.
Ricci flow and the determinant of the Laplacian on non-compact surfaces
Creators: name: Albin, Pierre
name: Aldana, Clara L.
name: Rochon, Frédéric
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 58C40, 58J52, 35P99

description: On compact surfaces with or without boundary, Osgood, Phillips and Sarnak proved that the maximum of the determinant of the Laplacian within a conformal class of metrics with fixed area occurs at a metric of constant curvature and, for negative Euler characteristic, exhibited a flow from a given metric to a constant curvature metric along which the determinant increases. The aim of this paper is to perform a similar analysis for the determinant of the Laplacian on a non-compact surface whose ends are asymptotic to hyperbolic funnels or cusps. In that context, we show that the Ricci flow converges to a metric of constant curvature and that the determinant increases along this flow.
description: 40 pages, 4 figures, other minor changes
Exponential class of dynamic binary choice panel data models with fixed effects
Creators: name: Al-Sadoon, Majid M.
name: Li, Tong
name: Pesaran, M. Hashem
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy

description: This paper proposes an exponential class of dynamic binary choice panel data models for the analysis of short T (time dimension) large N (cross section dimension) panel data sets that allow for unobserved heterogeneity (fixed effects) to be arbitrarily correlated with the covariates. The paper derives moment conditions that are invariant to the fixed effects which are then used to identify and estimate the parameters of the model. Accordingly, generalized method of moments (GMM) estimators are proposed that are consistent and asymptotically normally distributed at the root-N rate. We also study the conditional likelihood approach and show that under exponential specification, it can identify the effect of state dependence but not the effects of other covariates. Monte Carlo experiments show satisfactory finite sample performance for the proposed estimators and investigate their robustness to misspecification.
Che tempo fa sugli esopianeti?
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

I pianeti in orbita attorno a nane rosse hanno più probabilità di essere abitabili di quanto si credesse in passato. La presenza di nuvole può infatti rendere più mite il loro clima, ed estendere la fascia abitabile attorno a queste stelle. Lo dimostra uno studio su the Astrophysical Journal.
Analytically Solvable Model of Nonlinear Oscillations in a Cold but Viscous and Resistive Plasma
Creators: name: Infeld, E.
name: Rowlands, G.
name: Skorupski, A. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A method for solving model nonlinear equations describing plasma oscillations in the presence of viscosity and resistivity is given. By first going to the Lagrangian variables and then transforming the space variable conveniently, the solution in parametric form is obtained. It involves simple elementary functions. Our solution includes all known exact solutions for an ideal cold plasma and a large class of new ones for a more realistic plasma. A new nonlinear effect is found of splitting of the largest density maximum, with a saddle point between the peaks so obtained. The method may sometimes be useful where Inverse Scattering fails.
description: 4 pages, 4 figures, Phys. Rev. Letters in press
La nebulosa che fa per tre
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

La Trifida si trova in direzione della costellazione del Sagittario ed oltre ad essere una delle più belle nebulose, nella sua regione si possono osservare tutte e tre le tre varietà che caratterizzano questa classe di oggetti celesti. I consigli per individuare la Trifida, le costellazioni e i pianeti nel cielo notturno di luglio.