The use of the two-body energy to study problems of escape/capture Ernesto Vieira Neto1

The problem of escape/capture is encountered in many problems of the celestial mechanics -the capture of the giants planets irregular satellites, comets capture by Jupiter, and also orbital transfer between two celestial bodies as Earth and Moon. To study these problems we introduce an approach which is based on the numerical integration of a grid of initial conditions. The two-body energy of the particle relative to a celestial body defines the escape/capture. The trajectories are integrated into the past from initial conditions with negative two-body energy. The energy change from negative to positive is considered as an escape. By reversing the time, this escape turns into a capture. Using this technique we can understand many characteristics of the problem, as the maximum capture time, stable regions where the particles cannot escape from, and others. The advantage of this kind of approach is that it can be used out of plane (that is, for any inclination), and with perturbations in the dynamics of the n-body problem. © 2005 International Astronomical Union.

Underlying Event measurements in pp collisions at root s=0.9 and 7 TeV with the ALICE experiment at the LHC

We present measurements of Underlying Event observables in pp collisions at root s = 0 : 9 and 7 TeV. The analysis is performed as a function of the highest charged-particle transverse momentum p(T),L-T in the event. Different regions are defined with respect to the azimuthal direction of the leading (highest transverse momentum) track: Toward, Transverse and Away. The Toward and Away regions collect the fragmentation products of the hardest partonic interaction. The Transverse region is expected to be most sensitive to the Underlying Event activity. The study is performed with charged particles above three different p(T) thresholds: 0.15, 0.5 and 1.0 GeV/c. In the Transverse region we observe an increase in the multiplicity of a factor 2-3 between the lower and higher collision energies, depending on the track p(T) threshold considered. Data are compared to PYTHIA 6.4, PYTHIA 8.1 and PHOJET. On average, all models considered underestimate the multiplicity and summed p(T) in the Transverse region by about 10-30%.

Measurement of prompt J/psi and beauty hadron production cross sections at mid-rapidity in pp collisions at root s=7 TeV

The ALICE experiment at the LHC has studied J/psi production at mid-rapidity in pp collisions at root s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity L-int = 5.6 nb(-1). The fraction of J/psi from the decay of long-lived beauty hadrons was determined for J/psi candidates with transverse momentum p(t) > 1,3 GeV/c and rapidity vertical bar y vertical bar < 0.9. The cross section for prompt J/psi mesons, i.e. directly produced J/psi and prompt decays of heavier charmonium states such as the psi(2S) and chi(c) resonances, is sigma(prompt J/psi) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 8.3 +/- 0.8(stat.) +/- 1.1 (syst.)(-1.4)(+1.5) (syst. pol.) mu b. The cross section for the production of b-hadrons decaying to J/psi with p(t) > 1.3 GeV/c and vertical bar y vertical bar < 0.9 is a sigma(J/psi <- hB) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 1.46 +/- 0.38 (stat.)(-0.32)(+0.26) (syst.) mu b. The results are compared to QCD model predictions. The shape of the p(t) and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the b (b) over bar pair total cross section and d sigma/dy at mid-rapidity.

"Ernesto de tal" e suas duas versões

Este artigo tem por objetivo analisar o conto "Ernesto de tal", de Machado de Assis, sob a perspectiva histórica e social. Será objeto de estudo também a comparação entre as duas versões do conto; a primeira, publicada no Jornal das Famílias, e a segunda, publicada no livro Histórias da meia-noite. Por meio da apreciação do cotejo entre as duas versões do conto em questão, procuraremos ainda refletir sobre como Machado criava e reescrevia seus textos.

Ernesto Buonaiuti e la rivista «Il Rinnovamento»

This work is about the modernist writer Ernesto Buonaiuti (1881-1946) in the early years of his cultural activity. He was suggested by Alfred Loisy's historical method and by William James pragmatism in philosophy. So he refused traditional religious education he received to become a catholic priest and started a long-life battle against Roman Catholic Church. My research tries to investigate the influence of pragmatism on Buonaiuti's thought, analyzing articles he published on the modernist review «Il Rinnovamento», from 1907 to 1909. Then I compared philosophical themes with other works by Buonaiuti, trying to focus the development of his way of thinking throught the years until the end. My conclusion: Buonaiuti was a religious pragmatist all over his life and many works he published after the modernist crisis can confirm it.

Ernesto Nathan Rogers e le preesistenze ambientali. Itinerario teorico, 1948-1964

La tesi indaga il significato del concetto di “preesistenze ambientali” nel pensiero teorico dell’architetto Ernesto Nathan Rogers. Il tema è scelto come punto di vista privilegiato per indagare il contributo di Rogers al dibattito sull’eredità del Movimento Moderno in un momento, il secondo dopoguerra, in cui si intensifica la necessità di soffermare l’attenzione delle riflessioni teoriche sulle relazioni tra ambiente e progetto. Il problema fu inteso come la ricerca di un linguaggio adeguato all’era macchinista e di un ordine formale per lo sviluppo urbano recente da costruire in funzione del suo rapporto con la città consolidata. Esso fu sviluppato, all’interno dell’opera teorica rogersiana, come riflessione sulla dialettica contrapposizione tra intuizione e trasmissione del sapere, contingenza e universalità. La tesi mostra le ricche connessioni culturali tramite cui tale dialettica è capace di animare un discorso unitario che va dall’insegnamento del Movimento Moderno alle ricerche tipologiche e urbane della cultura italiana degli anni Sessanta. Riportando il concetto di preesistenze ambientali alla sua accezione originale, da un lato attraverso la ricostruzione delle relazioni intellettuali instaurate da Rogers con il Movimento Moderno e i CIAM, dall’altro mediante l’approfondimento del progetto editoriale costruito durante la direzione della rivista “Casabella continuità”, la tesi intende conferire alla nozione il valore di un contributo importante alla teoria della progettazione architettonica urbana. Il concetto di preesistenze ambientali diventa così la chiave analitica per indagare, in particolare, l’influenza del dibattito dell’VIII CIAM su Il Cuore della città e della partecipazione di Rogers al lavoro di redazione dell’Estudio del Plan di Buenos Aires nel 1948-1949 nella maturazione del progetto editoriale di “Casabella continuità” (1954-1965) attraverso l’attribuzione di un preciso valore all’archetipo, alla fenomenologia e alla tradizione nella definizione del rapporto architettura e storia.

Grammatica Ebræa Martino-Buxtorfiana. Seu, Grammatica Petri Martinii Navarri, quam ex accuratissimis aliorum Grammaticis, precipue verò Cl. Buxtorfii, suisque etiam observationibus Sixtinvs Amana, Innumeris in locis ita mutavit, correxit & auxit, ut nova meritò Grammatica dici possit. ...

Teilw. in hebr. Schr.

Ernesto Nathan [Illustration] : Bürgermeister von Rom und Großmeister der italienischen Freimaurerlogen

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Abgeordneter Ernesto Artom [Illustration] : (seine Sondergebiete sind: Auswärtige Politik und körperliche Ausbildung der Jugend)

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Ernesto Nathan [Illustration] : (kürzlich zum dritten Mal zum Bürgermeister Roms gewählt), in seinem Arbeitszimmer auf dem Kapitol

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Ms. germ. fol. 3 - Historia arcana oder Beheime Verzeichnüß von Martino Luthero und Philippo Melanchthone item Von denen drey Churfürsten zu Sachsen Johann Friedrichen, Moritzen und Augusto

Alte Signatur: II,49