Browsing Exact and Earth Sciences by Title

Now showing items 5708-5727 of 6559

    • Super metal-rich clusters g158 and g177 in m31 : clues on the inner bulge/disc transition 

      Bica, Eduardo Luiz Damiani; Jablonka, Pascale; Santos Junior, Joao Francisco Coelho dos; Alloin, Danielle Marie; Dottori, Horacio Alberto (1992) [Journal article]
      The star clusters G 158 and G 177, located at projected distances smaller than 1.5 kpc from the semi-stellar nucleus of M 31, show spectra extreme in absorption-line strengths, comparable to those from the nuclei of giant ...

    • Superposição linear em ensino de mecânica quântica 

      Greca, Ileana María; Herscovitz, Victoria Elnecave (2005) [Journal article]
      Apresentamos as linhas gerais de um curso organizado para introduzir conteúdos de Mecânica Quântica a estudantes universitários de quarto semestre da área de Ciências Exatas. A proposta foi utilizada em uma disciplina de ...

    • Super rogue wave generation in the linear regime 

      Bonatto, Cristian; Prado, Sandra Denise; Metz, Fernando Lucas; Schoffen, Julio Ricardo; Correia, Ricardo Rego Bordalo; Hickmann, Jandir Miguel (2020) [Journal article]
      Extreme or rogue waves are large and unexpected waves appearing with higher probability than predicted by Gaussian statistics. Although their formation is explained by both linear and nonlinear wave propagation, nonlinearity ...

    • A supersymmetric U/sub q/[osp(2|2)]-extended Hubbard model with boundary fields 

      Guan, Xi-Wen; Foerster, Angela; Grimm, Uwe; Römer, Rudolf A.; Schreiber, Michael (2001) [Journal article]
      A strongly correlated electron system associated with the quantum superalgebra Uq[osp(2|2)] is studied in the framework of the quantum inverse scattering method. By solving the graded reflection equation, two classes of ...

    • Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNb2O6 compounds 

      Sarvezuk, Paulo Willian Carvalho; Kinast, Eder Julio; Colin, C. V.; Gusmao, Miguel Angelo Cavalheiro; Cunha, Joao Batista Marimon da; Isnard, Olivier (2011) [Journal article]
      We present a systematic investigation of the series of compounds FexCo1−xNb2O6 by means of x-ray and neutron powder diffraction combined with magnetic measurements, carried out in the paramagnetic as well as in the ordered ...

    • Suppression of Λ (1520) resonance production in central Pb-Pb collisions at √sNN = 2.76 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Journal article]
      The production yield of the (1520) baryon resonance is measured at midrapidity in Pb-Pb collisions at √ sNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider (LHC). The measurement is performed in the (1520) ...

    • Surface modification of titanium by plasma nitriding 

      Kapczinski, Myriam Pereira; Gil, Carlos; Kinast, Eder Julio; Santos, Carlos Alberto dos (2003) [Journal article]
      A systematic investigation was undertaken on commercially pure titanium submitted to plasma nitriding. Thirteen different sets of operational parameters (nitriding time, sample temperature and plasma atmosphere) were used. ...

    • Surface morphology of spray-dried nanoparticle-coated microparticles designed as an oral drug delivery system 

      Beck, Ruy Carlos Ruver; Lionzo, Maria Ismenia Zulian; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir; Ré, Maria Inês; Gallas, Marcia Russman; Pohlmann, Adriana Raffin; Guterres, Silvia Stanisçuaski (2008) [Journal article]
      This paper was devoted to studying the influence of coating material (nanocapsules or nanospheres), drug model (diclofenac, acid or salt) and method of preparation on the morphological characteristics of nanoparticle-coated ...

    • Surface photometry and spectral analysis of Mk50 : a Seyfert 1 nucleus in an early type galaxy 

      Pastoriza, Miriani Griselda; Bica, Eduardo Luiz Damiani; Bonatto, Charles Jose; Mediavilla, Evencio; Pérez Jiménez, Enrique (1991) [Journal article]
      We analyze Markarian 50 using V and I CCD frames and IPCS and CCD spectra, respectively, obtained in June 1985 (low state of activity) and May 1990 (high state), covering the range 3200 Å<λ<10 100 Å. The surface brightness ...

    • Surface temperature patterns of Lagoa dos Patos, Brazil, using NOAA-AVHRR data : an annual cycle analysis 

      Zanotta, Daniel Capella; Ducati, Jorge Ricardo; Gonçalves, Glauber Acunha (2010) [Journal article]
      A processing chain for NOAA-AVHRR data can be used to retrieve lake surface water temperatures (LSWT) measurements based on a nonlinear sea surface temperature (NLSST) algorithm generally applied to open ocean conditions. ...

    • Surface tensions and surface potentials of acid solutions 

      Santos, Alexandre Pereira dos; Levin, Yan (2010) [Journal article]
      A theory is presented which allows us to quantitatively calculate the excess surface tension of acid solutions. The H+, in the form of hydronium ion, is found to be strongly adsorbed to the solution-air interface. To account ...

    • Surface water impacted by rural activities induces genetic toxicity related to recombinagenic events in vivo 

      Soares Neto, José Lopes; De Carli, Raíne Fogliati; Kotzal, Queila Susana Gambim; Latroni, Francine Bolico; Lehmann, Maurício; Dias, Johnny Ferraz; Souza, Cláudia Telles de; Niekraszewicz, Liana Appel Boufleur; Silva, Fernanda Rabaioli da; Silva, Juliana da; Dihl, Rafael Rodrigues (2016) [Journal article]
      This investigation assessed the interaction of surface water samples with DNA to quantitatively and qualitatively characterize their mutagenic and/or recombinagenic activity. Samples were obtained at three different sites ...

    • Sur la densite des systemes de pfaff sans solution algebrique 

      Mendes, Luis Gustavo Doninelli; Sebastiani Artecona, Marcos Antonio Arturo (1994) [Journal article]

    • A survey of early-type stars based on the Two Micron All Sky Survey database 

      Ortiz, Roberto Pereira; Malacarne, Marcio; Wilhelm, Ronald; Costa, R. D. D.; Rossi, Silvia; Maciel, Walter Junqueira (2007) [Journal article]
      We report the results of a spectroscopic survey of blue stars near the south Galactic pole, selected according to their color indices in the 2MASS database. The main scope of this work is to determine the nature of the ...

    • A survey of GPU-Based volume rendering of unstructured grids 

      Silva, Cláudio Teixeira; Comba, Joao Luiz Dihl; Callahan, Steven Paul; Bernardon, Fabio Fedrizzi (2005) [Journal article]
      A visualização volumétrica de grandes malhas não estruturadas é uma das principais metas da comunidade de visualização científica. Enquanto que em grades regulares o uso de técnicas baseadas em textura são adequadas para ...

    • A survey of the interstellar medium in early-type galaxies. III. Stellar and gas kinematics 

      Caon, Nicola; Macchetto, Ferdinando Duccio; Pastoriza, Miriani Griselda (2000) [Journal article]
      We present gaseous and stellar kinematics for 14 gas-rich early-type galaxies. Half of the sample exhibit irregular gaseous velocity profiles ; gas/star counter-rotation is visible in Ðve galaxies. We also find five ...

    • Survey of the ISM in early-type galaxies 

      Ferrari, Fabricio; Pastoriza, Miriani Griselda; Macchetto, Ferdinando Duccio; Bonatto, Charles Jose; Panagia, Nino; Sparks, William B. (2002) [Journal article]
      We present mid-IR photometric properties for a sample of 28 early-type galaxies observed at 6.75, 9.63 and 15 m with the ISOCAM instrument on board the ISO satellite. We nd total mid-IR luminosities in the range (3−42) x ...

    • Suscetibilidade do biodiesel de sebo bovino à biodegradação por pseudallescheria boydii 

      Cazarolli, Juciana Clarice; Bücker, Francielle; Manique, Márcia Cardoso; Krause, Laiza Canielas; Maciel, Gabriela Pereira da Silva; Onorevoli, Bruna; Caramão, Elina Bastos; Cavalcanti, Eduardo Homem de Siqueira; Samios, Dimitrios; Peralba, Maria do Carmo Ruaro; Bento, Fatima Menezes (2012) [Journal article]
      As características do biodiesel produzido podem afetar a sua suscetibilidade à biodegradação por ação microbiana, o que tem sido uma preocupação freqüente, pois leva a mudanças nas propriedades de combustível durante o ...

    • "Sustancia" en el devenir la quimica : dime cómo te buscan y te diré que eres 

      Henao Sierra, Berta Lucila; Stipcich, Maria Silvia; Moreira, Marco Antonio (2009) [Journal article]
      Con base en planteamientos de Stephen Toulmin se presentan algunos aspectos del devenir histórico de la Química, en relación con el concepto sustancia. En un recorrido somero y no lineal, el texto intenta mostrar algunas ...

    • A Swarm based approach to adapt the structural dimension of agents' organizations 

      Ferreira Júnior, Paulo Roberto; Oliveira, Denise de; Bazzan, Ana Lucia Cetertich (2005) [Journal article]
      One of the well studied issues in multi-agent systems is the standard action-selection problem where a goal task can be performed in di erent ways, by di erent agents. Also the sequence of these actions can in uence the ...