15 research outputs found

    Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC

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    This is the pre-print version of the Published Article, which can be accessed from the link below - Copyright @ 2010 Springer VerlagResults on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (eta) and azimuthal angle (phi). Short-range correlations in Delta(eta), which are studied in minimum bias events, are characterized using a simple "independent cluster" parametrization in order to quantify their strength (cluster size) and their extent in eta (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 inverse nb data set at 7 TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate transverse momentum of 1-3 GeV/c, 2.0< |Delta(eta)| <4.8 and Delta(phi) near 0. This is the first observation of such a long-range, near-side feature in two-particle correlation functions in pp or p p-bar collisions

    Strange Particle Production in pp Collisions at sqrt(s) = 0.9 and 7 TeV

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    Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC

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    Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (eta) and azimuthal angle (phi). Short-range correlations in Delta(eta), which are studied in minimum bias events, are characterized using a simple "independent cluster" parametrization in order to quantify their strength (cluster size) and their extent in eta (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 nb(-1) data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate p(T) of 1-3 GeV/c, 2.

    Adsorption of crude oil on anhydrous and hydrophobized vermiculite

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    This publication reports the adsorption of crude oil on vermiculite samples, expanded and hydrophobized with carnauba (Copernicia Cerifera) wax. The adsorption studies were performed by using columns filled with the vermiculite matrices and by dispersion of the vermiculite samples in an oil-water (50 ppm of oil) emulsion. The hydrate vermiculite exhibits a very low adsorption capacity against crude oil. On the other hand, anhydrous (expanded) and hydrophobized matrices show a high adsorption capacity. The 10% hydrophobized matrix show a 50% increased adsorption capacity, in comparison with the expanded one. For adsorption performed in the water-oil emulsion, saturation of the solid hydrophobized matrix is achieved after 60 min. The hydrophobized samples exhibit adsorption factors in the 0.7-1.0 range. (C) 2003 Elsevier Science (USA). All rights reserved.260230230

    DepressĂŁo e suicĂ­dio no filme "As Horas" DepresiĂłn y suicidio en la pelĂ­cula "Las Horas" Depression and suicide in the movie "The Hours"

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    As histórias dramatizadas nas telas dos cinemas são impactantes, uma vez que suscitam sentimentos vivenciados pelos seus apreciadores. Nessa perspectiva, o presente artigo procura identificar, demonstrar e comentar o comportamento depressivo nos personagens do filme As horas, de Stephen Daldry. Os personagens ilustram a vivência e convivência de pessoas com quadros depressivos em diferentes Êpocas e em diferentes graus de morbidade. O filme procura mostrar as diferentes manifestaçþes comportamentais e sintomåticas atravÊs da apresentação pessoal de cada personagem e tambÊm atravÊs do cenårio das histórias representadas. Observam-se traços de depressão psicótica na personagem de Virginia Woolf e um estado depressivo que tende à distimia na personagem de Laura Brown. Clarissa sugere uma "depressão dissimulada" e fortemente relacionada a Richard, cuja depressão culmina em suicídio. A condensação de Êpocas e a interligação entre os personagens refletem a universalidade e a atemporalidade dos fenômenos psíquicos, embora vividos de forma particular por cada um dos personagens.<br>Las historias dramatizadas en las pantallas de los cines son impactantes, una vez que suscitan sentimientos vivenciados por sus apreciadores. En esa perspectiva, el presente artículo busca identificar, demostrar y comentar el comportamiento depresivo en los personajes de la película Las horas, de Stephen Daldry. Los personajes ilustran la vivencia y convivencia de personas con cuadros depresivos en distintas Êpocas y en distintos grados de morbidad. La película busca mostrar las distintas manifestaciones comportamentales y sintomåticas a travÊs de la presentación personal de cada personaje y tambiÊn a travÊs del escenario de las historias representadas. Se observan rasgos de depresión psicótica en el personaje de Virginia Woolf y un estado depresivo que tiende a la distimia en el personaje de Laura Brown. Clarisa sugiere una "depresión disimulada" y fuertemente relacionada a Richard, cuya depresión culmina en suicidio. La condensación de Êpocas y la interconexión entre los personajes reflejan la universalidad y la atemporalidad de los fenómenos psíquicos, aunque vividos de modo particular por cada uno de los personajes.<br>The stories dramatized in movie screens are striking, once they arouse feelings that are experienced by the audience. From this perspective, the present article attempts to identify, demonstrate and comment on the depressive behavior of the characters in the movie The Hours, by Stephen Daldry. The characters illustrate the people's coexistence with depressive states in different times and in different morbidity levels. The movie tries to show the different behavioral and symptomatic manifestations through the personal presentation of each character, as well as through the scenery of the stories. Traces of psychotic depression can be seen in Virginia Woolf's character and a depressive state that tends to dysthymia in Laura Brown's character. Clarissa suggests a "dissembling depression" which is strongly related to Richard, whose depression culminates in suicide. The combination of different times and the interconnection between the characters reflect the universal and atemporal character of the psychological phenomena, although they are privately experienced by each character
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