cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A k-generalized statistical mechanics approach to income analysis
Creators: name: Clementi, F.
name: Gallegati, M.
name: Kaniadakis, G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: This paper proposes a statistical mechanics approach to the analysis of income distribution and inequality. A new distribution function, having its roots in the framework of k-generalized statistics, is derived that is particularly suitable to describe the whole spectrum of incomes, from the low-middle income region up to the high-income Pareto power-law regime. Analytical expressions for the shape, moments and some other basic statistical properties are given. Furthermore, several well-known econometric tools for measuring inequality, which all exist in a closed form, are considered. A method for parameter estimation is also discussed. The model is shown to fit remarkably well the data on personal income for the United States, and the analysis of inequality performed in terms of its parameters reveals very powerful.
description: LaTeX2e; 15 pages with 1 figure; corrected typos
Caccia ai pianeti di Proxima Centauri
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Gli astronomi sono convinti che attorno alla stella più vicina in assoluto a noi dopo il Sole ci siano pianeti, e per di più della taglia della Terra. Ma finora il telescopio spaziale Hubble non è riuscito a individuarli. Si riparte così alla loro ricerca cambiando però tecnica, sfruttando l'effetto della lente gravitazionale. Bisognerà però attendere fino a ottobre del 2014, quando si aprirà la prima finestra utile per questo tipo di osservazioni.
Il Sistema Solare non è periferico
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Uno studio pubblicato su The Astrophysical Journal ha dimostrato che lo Sperone di Orione, sede del nostro Sistema Solare, non sarebbe sono una piccola protuberanza nella spirale della galassia, ma una struttura più importante. Gli astronomi credono sia un ramo del Braccio di Perseo.
title: Ð¢ÑÐ°ÐºÑÐ¾ÑÐ½ÑÐ¹ Ð´Ð¸Ð·ÐµÐ»ÑÐ½ÑÐ¹ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑÑ 320 ÐºÐÑ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ°Ð»ÐµÐµÐ², ÐÐ»ÐµÐ³
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: Ð´Ð¸Ð·ÐµÐ»ÑÐ½ÑÐµ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ð¸
ÑÑÐ°ÐºÑÐ¾ÑÑ
Ð¿Ð¾ÑÑÐ½ÐµÐ²ÑÐµ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ð¸

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ ÑÑÐ°ÐºÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð´Ð¸Ð·ÐµÐ»Ñ 320 ÐºÐÑ. Ð ÑÐ¾Ð´Ðµ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ñ ÑÐ°Ð±Ð¾ÑÑ ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½Ñ: ÑÐ°Ð±Ð¾ÑÐ¸Ð¹ Ð¿ÑÐ¾ÑÐµÑÑ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ Ð¿Ð¾ Ð¼ÐµÑÐ¾Ð´Ñ ÐÑÐ¸Ð½ÐµÐ²ÐµÑÐºÐ¾Ð³Ð¾-ÐÐ°Ð·Ð¸Ð½Ð³Ð°, ÑÐ¸Ð»Ñ Ð¸ Ð¼Ð¾Ð¼ÐµÐ½ÑÑ, Ð²Ð¾Ð·Ð½Ð¸ÐºÐ°ÑÑÐ¸Ðµ Ð² ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ°Ñ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ, Ð° ÑÐ°ÐºÐ¶Ðµ Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÐ°Ð²Ð½Ð¾Ð²ÐµÑÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¸ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ ÑÐ°ÑÑÐµÑÑ Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ ÐºÐ¾Ð»ÐµÐ½ÑÐ°ÑÐ¾Ð³Ð¾ Ð²Ð°Ð»Ð°, ÑÐ°ÑÑÐ½Ð° Ð¸ Ð¿Ð¾ÑÑÐ½ÐµÐ²Ð¾Ð³Ð¾ Ð¿Ð°Ð»ÑÑÐ° Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÑÐ°ÑÑÐµÑÐ¾Ð² ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ Ð¿ÑÐ¾Ð´Ð¾Ð»ÑÐ½ÑÐ¹ Ð¸ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½ÑÐ¹ ÑÐ°Ð·ÑÐµÐ·Ñ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ.
Entanglement spread and clean resource inequalities
Creators: name: Harrow, Aram W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This article will examine states that superpose different amounts of entanglement and protocols that run in superposition but generate or consume different amounts of entanglement. In both cases we find a uniquely quantum difficulty: entanglement cannot be conditionally discarded without either using communication or causing decoherence. I will first describe the problem of entanglement spread in states and operations, as well as some methods of dealing with it. Then I'll describe three applications to problems that at first glance appear to be quite different: first, a reinterpretation of the old observation that creating n partially entangled states from singlets requires theta(sqrt(n)) communication, but cannot itself be used to communicate; second, a new lower bound technique for communication complexity; third, an explanation of how to extend the quantum reverse Shannon theorem from tensor power sources to general sources.
description: 11 pages. This is an extended version of an article that appeared in the proceedings of ICMP09: the 16th International Congress on Mathematical Physics. v2. Fixed a sign error in one definition
Andreev bound states in iron pnictide superconductors
Creators: name: Huang, Wen-Min
name: Lin, Hsiu-Hau
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, Andreev bound states in iron pnictide have been proposed as an experimental probe to detect the relative minus sign in the $s_\pm$-wave pairing. While previous theoretical investigations demonstrated the feasibility of the approach, the local density of states in the midgap regime is small, making the detection hard in experiments. We revisit this important problem from the Bogoliubov-de Gennes Hamiltonian on the square lattice with appropriate boundary conditions. Significant spectral weights in the midgap regime are spotted, leading to easy detection of the Andreev bound states in experiments. Peaks in the momentum-resolved local density of states appear and lead to enhanced quasiparticle interferences at specific momenta. We analyze the locations of these magic spots and propose they can be verified in experiments by the Fourier-transformed scanning tunneling spectroscopy.
description: 5 pages, 3 figures
Serata di beneficenza con le Stelle
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2013

Si chiamano "Addà passà la nuttata" e Lemuseper - l'oro" le due associazioni di volontariato che aiutano i ragazzi del Rione Sanità o che soffrono di disabilità. L'iniziativa di beneficenza organizzata dall'Osservatorio di Capodimonte dell'INAF, in particolare da Maria Teresa Fulco e Amata Mercurio
A Spitzer Study of 21 and 30 Micron Emission in Several Galactic Carbon-rich Proto-Planetary Nebulae
Creators: name: Hrivnak, Bruce J.
name: Volk, Kevin
name: Kwok, Sun
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have carried out mid-infrared spectroscopy of seven Galactic proto-planetary nebulae (PPNs) using the Spitzer Space Telescope. They were observed from 10-36 microns at relatively high spectral resolution, R~600. The sample was chosen because they all gave some evidence in the visible of a carbon-rich chemistry. All seven of the sources show the broad, unidentified 21 micron emission feature; three of them are new detections (IRAS 06530-0213, 07430+1115, and 19477+2401) and the others are observed at higher S/N than in previous spectra. These have the same shape and central wavelength (20.1 microns) as found in the ISO spectra of the brighter PPNs. The 30 micron feature was seen in all seven objects. However, it is not resolved into two separate features (26 and 33 microns) as was claimed on the basis of ISO spectra, which presumably suffered from the noisy detector bands in this region. All showed the infrared aromatic bands (AIB) at 11.3, 12.4, and 13.3 microns. Five of these also appear to have the C2H2 molecular band at 13.7 microns, one in absorption and four in emission. This is extremely rare, with only one other evolved star, IRC+10216, in which C2H2 emission has been observed. Four also possessed a broad, unidentified emission feature at 15.8 microns that may possibly be related to the 21 micron feature. Model fits were made to the spectral energy distributions for these PPNs to determine properties of the detached circumstellar envelopes. The 21 micron feature has been seen in all Galactic carbon-rich PPNs observed, and thus its carrier appears to be a common component of the outflow around these objects.
Buon compleanno, Mars Express!
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Le celebrazioni in corso oggi e domani al centro ESA di Darmstadt in Germania se le è meritate tutte: da quasi due lustri infatti la missione dedicata allo studio del Pianeta rosso sta raccogliendo una mole  smisurata di dati che ci stanno regalando una visione così dettagliata del pianeta e del suo ambiente come mai prima d'ora era stato possibile. E molto è ancora il lavoro in programma per i prossimi anni.
title: Ð¡ÐµÐ¿Ð°ÑÐ°ÑÐ¸Ð·Ð¼ Ð² ÐÑÐ¿Ð°Ð½Ð¸Ð¸ Ð½Ð° ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ð¼ ÑÑÐ°Ð¿Ðµ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ¾Ð¼Ð°ÑÐ¾Ð²Ð°, ÐÐ¸Ð°Ð½Ð°
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: ÐÑÐ¿Ð°Ð½Ð¸Ñ
Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÐµ Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ñ
ÑÑÑÐ°Ð½Ð° ÐÐ°ÑÐºÐ¾Ð²
ÐÐ°ÑÐ°Ð»Ð¾Ð½Ð¸Ñ
ÑÐµÐ¿Ð°ÑÐ°ÑÐ¸Ð·Ð¼
ÑÐµÐ³Ð¸Ð¾Ð½Ð°Ð»Ð¸Ð·Ð¼
Ð½Ð°ÑÐ¸Ð¾Ð½Ð°Ð»Ð¸Ð·Ð¼
Spain
international relations
Basque country
Catalonia
separatism
regionalism
nationalism

description: Ð Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð° ÑÐµÐ¿Ð°ÑÐ°ÑÐ¸Ð·Ð¼Ð° Ð² ÐÑÐ¿Ð°Ð½Ð¸Ð¸. ÐÐ²ÑÐ¾ÑÐ¾Ð¼ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÑÑÑÑÑ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ Ð¿ÑÐ¸ÑÐ¸Ð½Ñ Ð²Ð¾Ð·Ð½Ð¸ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ñ, Ð¾Ð¿Ð¸ÑÑÐ²Ð°ÐµÑÑÑ Ð¿ÑÐ¾ÑÐµÑÑ ÑÑÐ°Ð½Ð¾Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ðµ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ðµ ÐºÐ¾Ð½ÑÐ»Ð¸ÐºÑÐ° Ð½Ð° ÐºÐ¾Ð½ÐµÑ 2015 Ð³. Ð ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð° ÑÐµÐ¿Ð°ÑÐ°ÑÐ¸Ð·Ð¼Ð° ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐ°Ñ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð½ÑÑ ÑÐµÐ³Ð¸Ð¾Ð½Ð¾Ð²: Ð¡ÑÑÐ°Ð½Ñ ÐÐ°ÑÐºÐ¾Ð² Ð¸ ÐÐ°ÑÐ°Ð»Ð¾Ð½Ð¸Ð¸. ÐÑÐ¸ Ð°Ð½Ð°Ð»Ð¸Ð·Ðµ Ð¾ÑÐ¾Ð±Ð¾Ðµ Ð²Ð½Ð¸Ð¼Ð°Ð½Ð¸Ðµ ÑÐ´ÐµÐ»ÑÐµÑÑÑ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¸Ñ Ð·Ð°ÐºÐ¾Ð½Ð¾Ð´Ð°ÑÐµÐ»ÑÐ½ÑÑ Ð°ÐºÑÐ¾Ð², ÐÐ¾Ð½ÑÑÐ¸ÑÑÑÐ¸Ð¸ Ð¸ Ð¡ÑÐ°ÑÑÑÐ¾Ð² ÐÐ²ÑÐ¾Ð½Ð¾Ð¼Ð½ÑÑ Ð¡Ð¾Ð¾Ð±ÑÐµÑÑÐ². Ð¡Ð¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð°Ñ ÑÐ¸ÑÑÐ°ÑÐ¸Ñ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð² ÑÐ°Ð¼ÐºÐ°Ñ Ð°ÐºÑÑÐ°Ð»ÑÐ½Ð¾Ð¹ Ð½Ð° Ð¼Ð¾Ð¼ÐµÐ½Ñ Ð½Ð°Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ ÑÐ°Ð±Ð¾ÑÑ ÐºÐ¾Ð½ÑÐµÐ¿ÑÐ¸Ð¸ ÑÐµÐ³Ð¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ ÐµÐ²ÑÐ¾Ð¿ÐµÐ¹ÑÐºÐ¾Ð³Ð¾ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Â«ÐÐ²ÑÐ¾Ð¿Ð° Ð ÐµÐ³Ð¸Ð¾Ð½Ð¾Ð²Â», ÐºÐ¾ÑÐ¾ÑÐ°Ñ Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÐµÑ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÑÑ ÑÐ²Ð»ÐµÐ½Ð¸Ðµ ÑÐµÐ¿Ð°ÑÐ°ÑÐ¸Ð·Ð¼Ð° Ð² ÐÑÐ¿Ð°Ð½Ð¸Ð¸ Ñ ÑÐ¾ÑÐºÐ¸ Ð·ÑÐµÐ½Ð¸Ñ Ð¾Ð±ÑÐµÐµÐ²ÑÐ¾Ð¿ÐµÐ¹ÑÐºÐ¸Ñ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐµÐ½Ð´ÐµÐ½ÑÐ¸Ð¹.
description: This thesis work explores the problem of separatism in Spain. The author outlines the main causes, describes the process of formation and the current state of the conflict at the end of 2015. The problem of separatism is shown with examples of the most problematic regions: Basque Country and Catalonia. Special attention is given to the interpretation of Spanish Contitution, local statutes and others laws. The author uses the concept of European regional strategy âEurope of regionsâ to analyze the current state of separatism in Spain in the context of Common European Policy.
Schianto in diretta per Ebb e Flow
Creators: Livia Giacomini
Publisher: name: Media Inaf
Year: 2013

Le immagini dell'impatto delle due sonde GRAIL sul suolo lunare, riprese dalla Lunar Reconnaissance Orbiter a dicembre 2012. I team delle due missioni hanno dovuto compiere un piccolo miracolo per far incrociare i tragitti delle tre sonde e riprendere i due impatti.
Proteolytic release of the intramolecular chaperone domain confers processivity to endosialidase F
Creators: name: Schwarzer, David
name: Stummeyer, Katharina
name: Haselhorst, Thomas
name: Freiberger, Friedrich
name: Rode, Bastian
name: Grove, Melanie
name: Scheper, Thomas
name: Itzstein, Mark Von
name: Mühlenhoff, Martina
name: Gerardy-Schahn, Rita
Publisher: name: Bethesda, Md. : ASBMB Publications
Year: 2009
Subjects: subject: Binding Sites
subject: Carbohydrate Sequence
subject: Enzyme Activation
subject: Kinetics
subject: Models, Molecular
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Endosialidases (endoNs), as identified so far, are tailspike proteins of bacteriophages that specifically bind and degrade the α2,8-linked polysialic acid (polySia) capsules of their hosts. The crystal structure solved for the catalytic domain of endoN from coliphage K1F (endoNF) revealed a functional trimer. Folding of the catalytic trimer is mediated by an intramolecular C-terminal chaperone domain. Release of the chaperone from the folded protein confers kinetic stability to endoNF. In mutant c(S), the replacement of serine 911 by alanine prevents proteolysis and generates an enzyme that varies in activity from wild type. Using soluble polySia as substrate a 3-times higher activity was detected while evaluation with immobilized polySia revealed a 190-fold reduced activity. Importantly, activity of c(S) did not differ from wild type with tetrameric sialic acid, the minimal endoNF substrate. Furthermore, we show that the presence of the chaperone domain in c(S) destabilizes binding to polySia in a similar way as did selective disruption of a polySia binding site in the stalk domain. The improved catalytic efficiency toward soluble polySia observed in these mutants can be explained by higher dissociation and association probabilities, whereas inversely, an impaired processivity was found. The fact that endoNF is a processive enzyme introduces a new molecular basis to explain capsule degradation by bacteriophages, which until now has been regarded as a result of cooperative interaction of tailspike proteins. Moreover, knowing that release of the chaperone domain confers kinetic stability and processivity, conservation of the proteolytic process can be explained by its importance in phage evolution. © 2009 by The American Society for Biochemistry and Molecular Biology, Inc.
The Gysin exact sequence for $S^1$-equivariant symplectic homology
Creators: name: Bourgeois, Frédéric
name: Oancea, Alexandru
Publisher: name: arXiv
Year: 2009
Subjects: subject: Symplectic Geometry (math.SG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 53D40, 55P50, 53D12

description: We define $S^1$-equivariant symplectic homology for symplectically aspherical manifolds with contact boundary, using a Floer-type construction first proposed by Viterbo. We show that it is related to the usual symplectic homology by a Gysin exact sequence. As an important ingredient of the proof, we define a parametrized version of symplectic homology, corresponding to families of Hamiltonian functions indexed by a finite dimensional smooth parameter space.
description: v3: 48 pages. Added Lemma 5.8 relating the long exact sequence of the cone and the Gysin sequence. Various other modifications throughout the text following referee's comments. This is the final version published in J. Topol. Anal
Un esopianeta leggero leggero
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2013

Il pianeta appena scoperto dal Very Large Telescope dell'ESO è in orbita intorno alla giovane stella HD 95086 a una distanza di circa 56 volte la distanza dalla Terra al Sole e ha una massa di 4/5 volte volte superiore a Giove. Sarebbe quindi il pianeta più leggero finora osservato direttamente fuori dal Sistema solare.
Cycle decompositions: from graphs to continua
Creators: name: Georgakopoulos, Agelos
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Topology (math.GN)
subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 55N20, 05C63, 54E35

description: We generalise a fundamental graph-theoretical fact, stating that every element of the cycle space of a graph is a sum of edge-disjoint cycles, to arbitrary continua. To achieve this we replace graph cycles by topological circles, and replace the cycle space of a graph by a new homology group for continua which is a quotient of the first singular homology group $H_1$. This homology seems to be particularly apt for studying spaces with infinitely generated $H_1$, e.g. infinite graphs or fractals.
description: Advances in Mathematics (2011)
Dal Big Bang all’uomo in 6 immagini
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Torna anche quest'anno l'iniziativa 'Notti d'estate ad Arcetri' che fino al 14 luglio propone una serie di appuntamenti tra teatro, letture incontri, cinema, cene e osservazioni al Teatro del cielo. Si parte con uno spettacolo teatrale di e con lo scrittore Antonio Pascale e l'astrofisico Amedeo Balbi, un racconto a due voci che è un ideale viaggio dalla nascita dell'universo fino ai giorni nostri.
L’asteroide ha la sua luna
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2013

Dalle prime osservazioni radar effettuate con il radiotelescopio di Goldstone si scopre che l'asteroide 1998 QE2 non è solo: ha un piccolo satellite di circa 600 metri di diametro a fargli compagnia.
Splitting of Majorana modes due to intervortex tunneling in a p + ip superconductor
Creators: name: Cheng, Meng
name: Lutchyn, Roman M.
name: Galitski, Victor
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider a two-dimensional px+i py superconductor in the presence of multiple vortices, which support zero-energy Majorana fermion states in their cores. Intervortex tunnelings of the Majorana fermions lift the topological state degeneracy. Using the Bogoliubov-de Gennes equation, we calculate splitting of the zero-energy modes due to these tunneling events. We also discuss superconducting fluctuations and, in particular, their effect on the energy splitting.
description: 4 pages, 1 figure, accepted for publication in PRL
ISON all’orizzonte
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2013

Nuova serie di immagini della cometa C/2012 S1, più nota come ISON, che si sta avvicinando al sistema solare interno. Se sopravviverà all'incontro ravvicinato con il Sole a novembre, darà spettacolo nei nostri cieli a dicembre.
Submillimetre Variability of Eta Carinae: cool dust within the outer ejecta
Creators: name: Gomez, H. L.
name: Vlahakis, C.
name: Stretch, C. M.
name: Dunne, L.
name: Eales, S. A.
name: Beelen, A.
name: Gomez, E. L.
name: Edmunds, M. G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Previous submillimetre (submm) observations detected 0.7 solar masses of cool dust emission around the Luminous Blue Variable (LBV) star Eta Carinae. These observations were hindered by the low declination of Eta Carinae and contamination from free-free emission orginating from the stellar wind. Here, we present deep submm observations with LABOCA at 870um, taken shortly after a maximum in the 5.5-yr radio cycle. We find a significant difference in the submm flux measured here compared with the previous measurement: the first indication of variability at submm wavelengths. A comparison of the submm structures with ionised emission features suggests the 870um is dominated by emission from the ionised wind and not thermal emission from dust. We estimate 0.4 +/- 0.1 solar masses of dust surrounding Eta Carinae. The spatial distribution of the submm emission limits the mass loss to within the last thousand years, and is associated with mass ejected during the great eruptions and the pre-outburst LBV wind phase; we estimate that Eta Carinae has ejected > 40 solar masses of gas within this timescale.
description: 5 pages, 3 figures, accepted by MNRAS Letters
A process independent of the anaphase-promoting complex contributes to instability of the yeast S phase cyclin Clb5
Creators: name: Sari, Fatih
name: Braus, Gerhard H.
name: Irniger, Stefan
Publisher: name: Bethesda, Md. : ASBMB Publications
Year: 2007
Subjects: subject: Cyclin B
subject: Cyclins
subject: G1 Phase
subject: Half-Life
subject: Proteasome Endopeptidase Complex
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Proteolytic destruction of many cyclins is induced by a multi-subunit ubiquitin ligase termed the anaphase promoting complex/ cyclosome (APC/C). In the budding yeast Saccharomyces cerevisiae, the S phase cyclin Clb5 and the mitotic cyclins Clb1-4 are known as substrates of this complex. The relevance of APC/C in proteolysis of Clb5 is still under debate. Importantly, a deletion of the Clb5 destruction box has little influence on cell cycle progression. To understand Clb5 degradation in more detail, we applied in vivo pulse labeling to determine the half-life of Clb5 at different cell cycle stages and in the presence or absence of APC/C activity. Clb5 is significantly unstable, with a half-life of ∼8-10 min, at cell cycle periods when APC/C is inactive and in mutants impaired in APC/C function. A Clb5 version lacking its cyclin destruction box is similarly unstable. The half-life of Clb5 is further decreased in a destruction box-dependent manner to 3-5 min in mitotic or G 1 cells with active APC/C. Clb5 instability is highly dependent on the function of the proteasome. We conclude that Clb5 proteolysis involves two different modes for targeting of Clb5 to the proteasome, an APC/C-dependent and an APC/C-independent mechanism. These different modes apparently have overlapping functions in restricting Clb5 levels in a normal cell cycle, but APC/C function is essential in the presence of abnormally high Clb5 levels. © 2007 by The American Society for Biochemistry and Molecular Biology, Inc.
Update on the quantum properties of the Supermembrane
Creators: name: del Moral, M. P. Garcia
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we summarize some of the quantum properties found since the early 80's until nowdays that characterize at quantum level the spectrum of the supermembrane. In particular we will focus on a topological sector of the 11D supermembrane that, contrary to the general case, has a purely discrete spectrum at supersymmetric level. This construction has been consistently implemented in different types of backgrounds: toroidal and orbifold-type with G2 structure able to lead to a true G2 compactification manifold. This theory has N=1 supersymmetries in 4D. comment on the relevant points of this construction as well as on its spectral characteristics. We will also make some comments on the quantum properties of some effective formulation of multiple M2's theories recently found.
description: 7pg, latex. Contribution to the RTN proceedings Varna 08
Chiral odd GPDs in transverse and longitudinal impact parameter spaces
Creators: name: Chakrabarti, D.
name: Manohar, R.
name: Mukherjee, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the chiral odd generalized parton distributions (GPDs) for non-zero skewness $ζ$ in transverse and longitudinal position spaces by taking Fourier transform with respect to the transverse and longitudinal momentum transfer respectively. We present overlap formulas for the chiral-odd GPDs in terms of light-front wave functions (LFWFs) of the proton both in the ERBL and DGLAP regions. We calculate them in a field theory inspired model of a relativistic spin 1/2 composite state with the correct correlation between the different LFWFs in Fock space, namely that of the quantum fluctuations of an electron in a generalized form of QED. We show the spin-orbit correlation effect of the two-particle LFWF as well as the correlation between the constituent spin and the transverse spin of the target.
description: 1 figure and references added, typos corrected. version to appear in Phys.Rev.D
Le masse nascoste della Luna
Creators: Antonio Marro
Publisher: name: Media Inaf
Year: 2013

Usando i dati della missione NASA Grail, i ricercatori sono riusciti a mappare con grande precisioni le anomale concentrazioni di massa sotto la superficie lunare che alterano il campo gravitazionale del satellite. Una nuova missione sulla Luna potrebbe ora navigare con maggiore precisione e meno rischi.
title: Atypical tubular non-communicating duodeno-jejunal enteric duplication cyst in young adolescent
Creators: name: Pooja, M K
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Abdominal imaging
subject: Abdomen
subject: Small bowel
subject: CT
subject: Clinical Cases

description: Clinical History: An 11-year-old female patient presented to the outpatient department with history of intermittent abdominal pain and vomiting following ingestion of food for 5days. On physical examination, abdomen was soft, tenderness was present over umbilical region. No evidence of palpable mass per abdomen. Bowel sounds were present. The patient’s parents also gave a past history of surgery for oesophagal duplication cyst 7 years back. Routine blood investigations were unremarkable. Serum amylase and lipase levels were within normal limits.

description: 11 years, female
title: ÐÐ¾ÑÑÐºÐ¸Ðµ Ð³Ð¸Ð´ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð½Ð° ÐÐ°Ð»ÑÐ¸Ð¹ÑÐºÐ¾Ð¼ Ð¼Ð¾ÑÐµ Ð² ÑÐ°Ð¹Ð¾Ð½Ðµ Ð£ÑÑÑ-ÐÑÐ³Ð¸
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Ð¾ÑÐ¾ÑÐ¸Ð»Ð¾Ð², ÐÐ°Ð½Ð¸Ð¸Ð»
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: Ð¼Ð¾Ð»-Ð¿ÑÐ¸ÑÐ°Ð»
Ð½ÐµÑÑÑÐ°Ñ ÑÐ¿ÑÐ½ÑÐ¾Ð²Ð°Ñ ÑÑÐµÐ½ÐºÐ°
Ð°ÐºÐ²Ð°ÑÐ¾ÑÐ¸Ñ
Ð²ÑÑÐ¾ÐºÐ¸Ð¹ ÑÐ²Ð°Ð¹Ð½ÑÐ¹ ÑÐ¾ÑÑÐ²ÐµÑÐº
Ð¼Ð¾ÑÑÐºÐ°Ñ ÑÐ°Ð¼Ð¾Ð¿Ð¾Ð´ÑÐµÐ¼Ð½Ð°Ñ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼Ð°

description: ÐÐ±ÑÐµÐºÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ: Ð¾Ð³ÑÐ°Ð´Ð¸ÑÐµÐ»ÑÐ½ÑÐµ Ð¸ Ð¿ÑÐ¸ÑÐ°Ð»ÑÐ½ÑÐµ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð¼Ð¾ÑÑÐºÐ¸Ñ Ð¿Ð¾ÑÑÐ¾Ð². Ð¦ÐµÐ»Ð¸ ÑÐ°Ð±Ð¾ÑÑ: ÑÐ°ÑÑÐµÑ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¹ Ð¾Ð³ÑÐ°Ð´Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ Ð¸ Ð¿ÑÐ¸ÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ð¹. Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½ ÑÐ°ÑÑÐµÑ Ð¾Ð³ÑÐ°Ð´Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð¸Ð· Ð¶ÐµÐ»ÐµÐ·Ð¾Ð±ÐµÑÐ¾Ð½Ð½ÑÑ Ð¼Ð°ÑÑÐ¸Ð²Ð¾Ð²-Ð³Ð¸Ð³Ð°Ð½ÑÐ¾Ð² Ð¸ Ð¿ÑÐ¸ÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð² Ð²Ð¸Ð´Ðµ Ð²ÑÑÐ¾ÐºÐ¾Ð³Ð¾ ÑÐ²Ð°Ð¹Ð½Ð¾Ð³Ð¾ ÑÐ¾ÑÑÐ²ÐµÑÐºÐ° Ñ Ð¿ÐµÑÐµÐ´Ð½ÐµÐ¹ Ð½ÐµÑÑÑÐµÐ¹ ÑÐ¿ÑÐ½ÑÐ¾Ð²Ð¾Ð¹ ÑÑÐµÐ½ÐºÐ¾Ð¹, Ð° ÑÐ°ÐºÐ¶Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¼Ð¾ÑÑÐºÐ¾Ð¹ ÑÐ°Ð¼Ð¾Ð¿Ð¾Ð´ÑÐµÐ¼Ð½Ð¾Ð¹ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼Ñ Ð² Ð²Ð¾Ð·Ð²ÐµÐ´ÐµÐ½Ð¸Ð¸ Ð¿ÑÐ¸ÑÐ°Ð»ÑÐ½ÑÑ ÑÐ¾Ð¾ÑÑÐ¶ÐµÐ½Ð¸Ð¹.
Passeggiando sui ciottoli di Marte
Creators: Nicola Nosengo
Publisher: name: Media Inaf
Year: 2013

Il rover della NASA Curiosity trova nel cratere Gale i caratteristici sassolini che si formano in presenza di corsi d'acqua. E' la più chiara indicazione trovata finora sulla natura degli antichi fiumi marziani. Nello studio su Science, i ricercatori stimano anche velocità e profondità del fiume che portava quei ciottoli.
Homological perturbation theory for algebras over operads
Creators: name: Berglund, Alexander
Publisher: name: arXiv
Year: 2009
Subjects: subject: Algebraic Topology (math.AT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 18D50, 55P48

description: We extend homological perturbation theory to encompass algebraic structures governed by operads and cooperads. The main difficulty is to find a suitable notion of algebra homotopy that generalizes to algebras over operads O. To solve this problem, we introduce what we call thick maps of O-algebras and special thick maps that we call pseudo-derivations, which serve as appropriate generalizations of algebra homotopies for the purposes of homological perturbation theory. As an application, we derive explicit formulas for transferring Cobar(C)-algebra structures along contractions, where C is any connected cooperad in chain complexes. This specializes to transfer formulas for O-infinity algebras for any Koszul operad O, in particular for A-infinity, C-infinity, L-infinity and G-infinity algebras. A key feature is that our formulas are expressed in terms of the compact description of Cobar(C)-algebras as coderivation differentials on cofree C-coalgebras. Moreover, we get formulas not only for the transferred structure and a structure on the inclusion, but also for structures on the projection and the homotopy.
description: Revised version, to appear in Algebr. Geom. Topol., 29 pages
Grinding of Iron-aluminides
Creators: name: Köhler, Jens
name: Moral, Analía
name: Denkena, Berend
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2013
Subjects: subject: Grinding
subject: Grinding temperatures
subject: Iron-aluminides
subject: Subsurface hardness: grinding forces
subject: Subsurface properties: surface roughness
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: Since the 1930s iron-aluminides are investigated due to their excellent corrosion resistance, low density and high specific strength. However, little work has been carried out on the machining of these alloys since then. This paper deals with grinding of Fe-26A1- 4Cr (at.%) with corundum grinding wheels and shows that the material can be machined in a ductile way, regardless of the material grain size. Material removal rates below Q'w = 0.75 mm3/mms and open grinding wheel topographies lead to low grinding temperatures and an advantageous chip removal. Thus, high process reliability regardmg workpiece quality and tool wear can be reached.
Quante TAC per un viaggio su Marte?
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Raggi cosmici e particelle energetiche solari. Un brodo di microscopici proiettili che popolano lo spazio e con le loro elevate energie possono attraversare pressoché indisturbati anche gli scafi più spessi delle navicelle spaziali, creando danni ai tessuti biologici degli astronauti al loro interno. Uno studio pubblicato online sulla rivista Science presenta i dati raccolti dallo strumento RAD a bordo del rover Curiosity della NASA che ha monitorato queste particelle nel suo lungo viaggio dalla Terra a Marte, indicando che, per un futuro equipaggio umano verso il Pianeta rosso, questo tragitto non sarà privo di rischi.
Quella gattamorta di Dione
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2013

Sotto la sua coltre di ghiaccio, la candida luna di Saturno potrebbe celare un’attività inattesa, proprio come le sue sorelle Titano ed Encelado. Forse addirittura un oceano, suggeriscono i dati raccolti dalla sonda NASA.
Dieta senza sodio per vecchie stelle
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Un team di ricercatori ha usato il Very Large Telescope per studiare nel dettaglio la luce proveniente dalle stelle dell'ammasso globulare NGC 6752, dove ci sono due generazioni di stelle. Scoprendo che quelle di seconda generazione, più ricche di sodio, non attraversano mai la fase di rapida espulsione di massa che ci si aspetterebbe dalle stelle di quel tipo quando invecchiano.
Separati alla nascita
Creators: Nicola Nosengo
Publisher: name: Media Inaf
Year: 2013

Uno studio su Nature spiega come due pianeti tanto simili quanto Venere e la Terra possano avere avuto evoluzioni così diverse. La chiave è ovviamente la distanza dal Sole, e in particolare il modo in cui il calore solare ha influenzato il tempo necessario perché la superficie dei due pianeti solidificasse. Con il commento di Diego Turrini (INAF).
Il magnetar non accelera, anzi frena
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2013

Altro magnetar, altra sorpresa. Dopo quello con un campo magnetico esterno insolitamente basso, ecco 1E 2259, colto dal telescopio spaziale Swift a rallentare improvvisamente la sua velocità di rotazione. Un comportamento che ha spiazzato letteralmente gli astrofisici, che invece si aspettavano un'accelerazione nella rotazione del corpo celeste. Gianluca Israel (INAF): "Ancora una volta i magnetar ci stupiscono con i loro comportamenti estremi, costringendoci a rivedere le nostre convinzioni". Lo studio è pubblicato online su Nature.
The Poisson equations in the nonholonomic Suslov problem: Integrability, meromorphic and hypergeometric solutions
Creators: name: Fedorov, Yuri
name: Maciejewski, Andrzej J.
name: Przybylska, Maria
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 70F25, 37J60, 34M35, 70E40

description: We consider the problem of integrability of the Poisson equations describing spatial motion of a rigid body in the classical nonholonomic Suslov problem. We obtain necessary conditions for their solutions to be meromorphic and show that under some further restrictions these conditions are also sufficient. The latter lead to a family of explicit meromorphic solutions, which correspond to rather special motions of the body in space. We also give explicit extra polynomial integrals in this case. In the more general case (but under one restriction), the Poisson equations are transformed into a generalized third order hypergeometric equation. A study of its monodromy group allows us also to calculate the "scattering" angle: the angle between the axes of limit permanent rotations of the body in space.
Un vortice di stelle brillanti
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Si chiama J125013.50+073441.5 ed è la nuova galassia a intensa formazione stellare fotografata dal telescopio spaziale di NASA ed ESA. La galassia è avvolta da un ammasso di materiale che le dà la forma a vortice.
Parmitano bussa alla Stazione Spaziale
Creators: Francesco Rea
Publisher: name: Media Inaf
Year: 2013

Luca Parmitano, del corpo astronauti dell'Agenzia Spaziale Europea, maggiore dell'Aeronautica Militare andrà a lavorare sulla Stazione Spaziale Internazionale per 165 giorni, grazie ad una delle opportunità di volo dell'Agenzia Spaziale Italiana, opportunità di volo supplementari agli altri paesi membri dell'ESA per il notevole contributo che l'Italia ha dato alla realizzazione della ISS
Augustine of Hippo's philosophy of time meets general relativity
Creators: name: Minguzzi, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Physics (physics.gen-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A cosmological model is proposed which uses a causality argument to solve the homogeneity and entropy problems of cosmology. In this model a chronology violating region of spacetime causally precedes the remainder of the Universe, and a theorem establishes the existence of time functions precisely outside the chronology violating region. This model is shown to nicely reproduce Augustine of Hippo's thought on time and the beginning of the Universe. In the model the spacelike boundary representing the Big Bang is replaced by a null hypersurface at which the gravitational degrees of freedom are almost frozen while the matter and radiation content is highly homogeneous and thermalized.
description: 23 pages, 2 figures. Originally prepared for the FQXi contest "What's Ultimately Possible in Physics?" with the title "Can God find a place in physics? St. Augustine's philosophy meets general relativity". v3: with respect to the published version it includes a further appendix with the proof of Theorem 3.4
Satelliti a cubetti
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2013

Presentata oggi a Vancouver, la missione BRITE è un’impresa congiunta di Canada, Austria e Polonia: una costellazione di nanosatelliti – due per ciascun paese – pensati per studiare le stelle variabili più luminose. La prima coppia è già in orbita.
ALMA mette le galassie sotto la lente
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2013

Utilizzando lo schieramento di 66 telescopi in Cile, alcuni ricercatori hanno scoperto un gruppo di galassie particolarmente luminose e attive nell'Universo primordiale, individuale grazie all'effetto della lente gravitazionale. Finora osservazioni di questo tipo le faceva solo Hubble nella luce visibile.
Bianchi Type V Matter Filled Universe with Varying Lambda Term in General Relativity
Creators: name: Yadav, Anil Kumar
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Bianchi type V matter filled universe with varying lambda in general relativity are investigated by using the law of variation for the generalized mean Hubble parameter. This yields the constant value of deceleration parameter and generates two types of solutions for the average scale factor one is of power law type and other is of exponential type. The cosmological constant is found to be a decreasing function of time, which is supported by results from recent type Ia supernovae observations. Also it has been found that cosmological constant affects entropy. Some physical and geometric behaviour of the models are discussed.
description: 16 pages, 3 figures
Self-organization of dissipationless solitons in negative refractive index materials
Creators: name: Skarka, V.
name: Aleksic, N. B.
name: Berezhiani, V. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: General nonlinear and nonparaxial dissipative complex Helmholtz equations for magnetic and electric fields propagating in negative refractive index materials (NIMs) are derived ab initio from Maxwell equations. In order to describe nonconservative soliton dynamics in NIMs, such coupled equations are reduced into generalized Ginzburg-Landau equation. Cross-compensation between the excess of saturating nonlinearity, losses, and gain renders these self-organized solitons dissipationless and exceptionally robust. The presence of such solitons makes NIMs effectively dissipationless.
description: 5 figures
Tutta la luce dell’universo
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2013

Pubblicata su ApJ la migliore stima mai ottenuta della radiazione di fondo extragalattica emessa nel corso degli ultimi cinque miliardi di anni. Misura effettuata in modo indiretto confrontando emissione gamma ed effetto Čerenkov dai blazar.
Rook placements in Young diagrams and permutation enumeration
Creators: name: Josuat-Vergès, Matthieu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Given two operators $\hat D$ and $\hat E$ subject to the relation $\hat D\hat E -q \hat E \hat D =p$, and a word $w$ in $M$ and $N$, the rewriting of $w$ in normal form is combinatorially described by rook placements in a Young diagram. We give enumerative results about these rook placements, particularly in the case where $p=(1-q)/q^2$. This case naturally arises in the context of the PASEP, a random process whose partition function and stationary distribution are expressed using two operators $D$ and $E$ subject to the relation $DE-qED=D+E$ (matrix Ansatz). Using the link obtained by Corteel and Williams between the PASEP, permutation tableaux and permutations, we prove a conjecture of Corteel and Rubey about permutation enumeration. This result gives the generating function for permutations of given size with respect to the number of ascents and occurrences of the pattern 13-2, this is also the moments of the $q$-Laguerre orthogonal polynomials.
description: V2. Many corrections. Submitted
Detriti lunari di importazione
Creators: Antonio Marro
Publisher: name: Media Inaf
Year: 2013

Lavorando su modelli al computer degli impatti di asteroidi sulla Luna, i ricercatori hanno concluso che alcuni strani minerali osservati nei crateri potrebbero essere resti dei meteoriti che colpirono il nostro satellite, e non provenire dagli strati profondi della Luna come si pensava. E chissà che non ci siano persino frammenti della nostra Terra. La ricerca su Nature Geoscience.
title: Ð¡Ð¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¾ÑÐ³Ð°Ð½Ð°Ñ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ¾Ð»Ð¾ÑÐ¾Ð², ÐÐ³Ð¾Ñ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: 2017
Subjects: ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ðµ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÐ¹ ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ
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description: ÐÐ±ÑÐµÐºÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÐµÑÑÑ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¾Ð²Ð°ÑÐ¾Ð². ÐÐºÑÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ ÑÐ°Ð±Ð¾ÑÑ Ð¾Ð±ÑÑÐ»Ð¾Ð²Ð»ÐµÐ½Ð° ÑÐµÐ¼, ÑÑÐ¾ Ð´Ð°ÐµÑ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑ Ð´Ð°ÑÑ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÑÐµÑÑÐ²ÑÑÑÐµÐ¹ ÑÐ¸ÑÑÐµÐ¼Ñ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¾ÑÐ³Ð°Ð½Ð°Ñ, Ð²ÑÑÐ²Ð¸ÑÑ ÐµÐµ Ð½ÐµÐ´Ð¾ÑÑÐ°ÑÐºÐ¸ Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°ÑÑ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð²Ð½ÑÐµ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¾ ÑÐµÐ¼Ðµ. Ð¦ÐµÐ»ÑÑ Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐµÑÑÑ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð½Ð°ÑÑÐ½Ð¾ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð½ÑÑ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ð¹ Ð¿Ð¾ ÑÐ¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¾ÑÐ³Ð°Ð½Ð°Ñ. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑÐ½Ð¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÐ¼Ð¾Ð³Ð¾ Ð²Ð¾Ð¿ÑÐ¾ÑÐ° Ð¼Ñ ÑÐ´ÐµÐ»Ð°Ð»Ð¸ Ð½Ð°ÑÑÐ½Ð¾-Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð½Ð¾Ðµ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ðµ Ð¿Ð¾ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¾ÑÐ³Ð°Ð½Ð°Ñ. ÐÑÑÐ²Ð»ÐµÐ½Ñ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½ÑÐµ ÑÐ¿Ð¾ÑÐ¾Ð±Ñ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¾ÑÐ³Ð°Ð½Ð°Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ ÑÐ¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð³Ð¾ Ð´ÐµÐºÐ»Ð°ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð¾ÑÐ³Ð°Ð½Ð°Ñ.
Comprehensive study of sodium, copper, and silver clusters over a wide range of sizes 2=
Creators: name: Itoh, Masahiro
name: Kumar, Vijay
name: Adschiri, Tadafumi
name: Kawazoe, Yoshiyuki
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The geometric and electronic structures of NaN, CuN, and AgN metal clusters are systematically studied based on the density functional theory over a wide range of cluster sizes 2=
description: 21 pages, 10 figures
Gravitational Theory with a Dynamical Time
Creators: name: Guendelman, E. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A gravitational theory involving a vector field $χ^μ$, whose zero component has the properties of a dynamical time, is studied. The variation of the action with respect to $χ^μ$ gives the covariant conservation of an energy momentum tensor $ T^{μν}_{(χ)}$. Studying the theory in a background which has killing vectors and killing tensors we find appropriate shift symmetries of the field $χ^μ$ which lead to conservation laws. The energy momentum that is the source of gravity $ T^{μν}_{(G)}$ is different but related to $ T^{μν}_{(χ)}$ and the covariant conservation of $ T^{μν}_{(G)}$ determines in general the vector field $χ^μ$. When $ T^{μν}_{(χ)}$ is chosen to be proportional to the metric, the theory coincides with the Two Measures Theory, which has been studied before in relation to the Cosmological Constant Problem. When the matter model consists of point particles, or strings, the form of $ T^{μν}_{(G)}$, solutions for $χ^μ$ are found. For the case of a string gas cosmology, we find that the Milne Universe can be a solution, where the gas of strings does not curve the spacetime since although $ T^{μν}_{(χ)} \neq 0$, $ T^{μν}_{(G)}= 0$, as a model for the early universe, this solution is also free of the horizon problem. There may be also an application to the "time problem" of quantum cosmology.
description: 21 pages, discussions extended, some more explicit proofs included, more references included
Differential Forms on Log Canonical Spaces
Creators: name: Greb, Daniel
name: Kebekus, Stefan
name: Kovacs, Sandor J.
name: Peternell, Thomas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 14F10 (Primary) 14F17, 14E30, 14D22 (Secondary)

description: The present paper is concerned with differential forms on log canonical varieties. It is shown that any p-form defined on the smooth locus of a variety with canonical or klt singularities extends regularly to any resolution of singularities. In fact, a much more general theorem for log canonical pairs is established. The proof relies on vanishing theorems for log canonical varieties and on methods of the minimal model program. In addition, a theory of differential forms on dlt pairs is developed. It is shown that many of the fundamental theorems and techniques known for sheaves of logarithmic differentials on smooth varieties also hold in the dlt setting. Immediate applications include the existence of a pull-back map for reflexive differentials, generalisations of Bogomolov-Sommese type vanishing results, and a positive answer to the Lipman-Zariski conjecture for klt spaces.
description: 72 pages, 6 figures. A shortened version of this paper has appeared in Publications math\'ematiques de l'IH\'ES. The final publication is available at http://www.springerlink.com
title: Effective Presentations = Эффективные презентации
title: Практикум
titleType: Subtitle
Creators: name: Гордина Е.А.
Publisher: name: Новосибирский государственный университет экономики и управления «НИНХ»
Year: 2016

description: Данный практикум знакомит студентов с особенностями проведения презентации на английском языке. Он содержит информацию и основные речевые модели по структуре презентации, а также советы о том, как сделать определенную часть или определенный прием наиболее эффективным и как избежать ошибок при проведении презентации. Включает упражнения, способствующие развитию навыков устной речи. Практикум предназначен для студентов I–II курсов направления «Международные отношения».
description: This workshop introduces students to the features of the presentation in English. It contains information and basic sentence patterns according to the structure of the presentation as well as tips on how to make a particular part or a particular method most effective and how to avoid mistakes during the presentation. Includes exercises to facilitate the development of oral communication skills. The workshop is designed for students I–II courses of direction "International relations".