Publications

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2004
{Pantoja, PD, Vendrusculo AP, Coertjens M, Petkowizs R, Tartaruga LAP.  2004.  Relação entre a sensação subjetiva ao esforço e consumo máximo de oxigênio.. Salão de iniciação Cient{\'ıfica (16.: 2004: Porto Alegre, RS). Livro de resumos. Porto Alegre: UFRGS, 2004.. Abstract
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van Beveren, E, Rupp G, Gonçalves VP, Machado MVT, Agaev SS, Stefanis NG, Boschi-Filho H, Braga NRF, Braun MA, Kolevatov RS, others.  2004.  Search for anomalous production of di-lepton events with missing transverse momentum in e e-collisions at 183–209 GeV p. 453. The European Physical Journal C. 32, Number 4 Abstract
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Favart, L, Machado MVT, Miller DE, Ilgenfritz EM, Martemyanov BV, Müller-Preussker M, Veselov AI, Hirn J, Stern J, Malinsk{\`y} M, others.  2004.  Search for charged Higgs bosons at LEP in general two Higgs doublet models p. 399. The European Physical Journal C-Particles and Fields. 34, Number 4 Abstract
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Dutta, B, Kim CS, Oh S, Zhu G, Martin AD, Ryskin MG, Watt G, Ma JP, Wang Q, Gonçalves VP, others.  2004.  Search for stellar gravitational collapses with the MACRO detector p. 265. The European Physical Journal C-Particles and Fields. 37, Number 3 Abstract
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Kruel, LFM, Tartaruga MP, Tartaruga LAP, Moraes LFR, Carravetta H, Rangel AB, Ribas LR.  2004.  Sistema computacional para análise da técnica de corrida. Lecturas: Educación f{\'ısica y deportes. :31., Number 72: Tulio Guterman Abstract
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Machado, MVT.  2004.  Ultrahigh energy neutrinos and nonlinear QCD dynamics. Physical Review D. 70:053008., Number 5: APS Abstract
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Dagnino, R.  2004.  Um olhar geográfico sobre a questão dos materiais recicláveis em Porto Alegre: sistemas de fluxos e a (in) formalidade, da coleta à comercialização. : Universidade Federal do Rio Grande do Sul Abstract
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Camargo, M, Barichello LB.  2004.  Unified Approach for Variable Collision Frequency Models in Rarefied Gas Dynamics. Transport Theory and Sthatistical Physics. 33:227–260. Abstract
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Goncalves, VP, Machado MVT.  2004.  {A Phenomenological analysis of the longitudinal structure function at small x and low Q**2}. Eur. Phys. J. C. 37:299–305. Abstract
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Goncalves, VP, Machado MVT.  2004.  {Charm production in diffractive deep inelastic scattering}. Phys. Lett. B. 588:180–188. Abstract
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Levy, L.  2004.  {Espinosa: Conatus e a Geometria dos Afetos}. Freud e seus Filósofos. (Sociedade Brasileira de Psicanálise, Ed.).:185–201., Porto Alegre: SBP-PA Abstract
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Goncalves, VP, Machado MVT.  2004.  {Geometric scaling in charm production on nucleon and nuclei}. AIP Conf. Proc.. 739(Bracco, Mirian, Chiapparini, Marcelo, Ferreira, Erasmo, Kodama, Takeshi, Eds.).:628–630., Number 1 Abstract
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Goncalves, VP, Machado MVT.  2004.  {Heavy quark production in ultraperipherical heavy ion collisions}. AIP Conf. Proc.. 739(Bracco, Mirian, Chiapparini, Marcelo, Ferreira, Erasmo, Kodama, Takeshi, Eds.).:631–633., Number 1 Abstract
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Goncalves, VP, Machado MVT.  2004.  {Nuclear charm and bottom production: A Comparison among high-energy approaches}. Eur. Phys. J. C. 32:501–506. Abstract
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Goncalves, VP, Machado MVT.  2004.  {Nuclear exclusive vector meson photoproduction}. Eur. Phys. J. C. 38:319–328. Abstract
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Goncalves, VP, Machado MVT.  2004.  {Parton saturation approach in heavy quark production at high energies}. Mod. Phys. Lett. A. 19:2525–2539. Abstract
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Lengyel, AI, Machado MVT.  2004.  {Phenomenology on the QCD dipole picture revisited}. Eur. Phys. J. A. 21:145–153. Abstract
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Favart, L, Machado MVT.  2004.  {QCD evolution and skewedness effects in color dipole description of DVCS}. Eur. Phys. J. C. 34:429–433. Abstract
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Machado, MVT.  2004.  {Ultrahigh-energy neutrinos and nonlinear QCD dynamics}. Phys. Rev. D. 70:053008. Abstract
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2003
Remor, E.  2003.  [Reliability and validity of the Spanish version of the MOS-SF-30 to assess the health related quality of life in people infected by HIV], Jun. Aten Primaria. 32(1):15-22.
Umeda, T, Omura Y, Yoon PH, Gaelzer R, Matsumoto H.  2003.  Harmonic {L}angmuir Waves. {III}\@. {V}lasov Simulation, February. Physics of Plasmas. 10:382–391., Number 2 AbstractWebsite

Generation of harmonic Langmuir modes during beam–plasma interaction is studied by means of nonlinear theoretical calculations and computer simulations. The present Vlasov simulation of multiple harmonic Langmuir modes (up to 12th harmonics), generalizes the previously available simulations which were restricted to the second harmonic only. The frequency-wave-number spectrum obtained by taking the Fourier transformation of simulated electric field both in time and space shows an excellent agreement with the theoretical nonlinear dispersion relations for harmonic Langmuir waves. The saturated wave amplitude features a quasi-power-law spectrum which reveals that the harmonic generation process may be an integral part of the Langmuir turbulence.

Gaelzer, R, Yoon PH, Umeda T, Omura Y, Matsumoto H.  2003.  Harmonic {L}angmuir Waves. {II}\@. {T}urbulence Spectrum, February. Physics of Plasmas. 10:373–381., Number 2 AbstractWebsite

The Langmuir wave turbulence generated by a beam–plasma interaction has been studied since the early days of plasma physics research. In particular, mechanisms which lead to the quasi-power-law spectrum for Langmuir waves have been investigated, since such a spectrum defines the turbulence characteristics. Meanwhile, the generation of harmonic Langmuir modes during the beam–plasma interaction has been known for quite some time, and yet has not been satisfactorily accounted for thus far. In paper I of this series, nonlinear dispersion relations for these harmonics have been derived. In this paper (paper II), generalized weak turbulence theory which includes multiharmonic Langmuir modes is formulated and the self-consistent particle and wave kinetic equations are solved. The result shows that harmonic Langmuir mode spectra can indeed exhibit a quasi-power-law feature, implying multiscale structure in both frequency and wave number space spanning several orders of magnitude.

Yoon, PH, Gaelzer R, Umeda T, Omura Y, Matsumoto H.  2003.  Harmonic {L}angmuir Waves. {I}\@. {N}onlinear Dispersion Relation, February. Physics of Plasmas. 10:364–372., Number 2 AbstractWebsite

Generation of electrostatic multiple harmonic Langmuir modes during beam–plasma interaction process has been observed in laboratory and spaceborne active experiments, as well as in computer simulation experiments. Despite earlier efforts, such a phenomenon has not been completely characterized both theoretically and in terms of numerical simulations. This paper is a first in a series of three papers in which analytic expressions for harmonic Langmuir mode dispersion relations are derived and compared against the numerical simulation result.

Betemps, MA, Ducati GMB, Machado MVT, Raufeisen J.  2003.  {Dilepton transverse momentum in the color dipole approach}, 8. {11th International Workshop on Deep Inelastic Scattering (DIS 2003)}. :331–335. Abstract
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Teixeira, FG, Barcia RM, da Silva RP, da Silva TKL.  2003.  A APLICAÇÃO DE ESTRATÉGIAS PEDAGÓGICAS NÃO PRESENCIAIS NO PROCESSO DE ENSINO-APRENDIZAGEM DA GEOMETRIA DESCRITIVA, 2003. GRAPHICA 2003GRAPHICA 2003. :-., Santa Cruz do Sul Abstract
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