Now showing items 784-803 of 4248

    • Dados comparativos sobre a evasão em física, matemática, química e biologia da Universidade Estadual de Londrina : 1996 a 2004 

      Arruda, Sergio de Mello; Carvalho, Marcelo Alves de; Passos, Marinez Meneghello; Silveira, Fernando Lang da (2006) [Journal article]
      O presente trabalho apresenta alguns dados sobre a evasão nos cursos de Física, Matemática, Biologia e Química da Universidade Estadual de Londrina. A novidade do trabalho consiste, principalmente, em uma nova maneira de ...
    • Damage accumulation in neon implanted silicon 

      Oliviero, Erwan Marie Hubert; Peripolli, Suzana Bottega; Amaral, Livio; Fichtner, Paulo Fernando Papaleo; Beaufort, Marie France; Barbot, Jean François; Donnelly, Stephen Eastwood (2006) [Journal article]
      Damage accumulation in neon-implanted silicon with fluences ranging from 5x1014 to 5x1016 Ne cm-² has been studied in detail. As-implanted and annealed samples were investigated by Rutherford backscattering spectrometry ...
    • Damage accumulation in Si crystal during ion implantation at elevated temperatures : evidence of chemical effects 

      Souza, Joel Pereira de; Suprun-Belevich, Yu.; Boudinov, Henri Ivanov; Cima, Carlos Alberto (2000) [Journal article]
      Damage in Si induced by irradiation with various light/medium mass ions at elevated temperatures and high doses (>=3x1016 cm-²) was studied using Rutherford backscattering spectroscopy, cross-section transmission electron ...
    • A dark energy camera search for missing supergiants in the LMC after the advanced LIGO gravitational-wave event GW150914 

      Annis, James T.; Soares-Santos, Marcelle; Berger, Edo; Brout, Dillon J.; Chen, Hsinyu; Chornock, Ryan; Cowperthwaite, Philip S.; Diehl, H. Thomas; Doctor, Z.; Drlica-Wagner, Alex; Drout, Maria R.; Farr, Benjamin F.; Finley, David A.; Flaugher, Brenna; Foley, Ryan Joseph; Frieman, Joshua A.; Gruendl, Robert A.; Herner, Kenneth R.; Holz, Daniel E.; Kessler, Richard S.; Lin, H.; Marriner, John P.; Neilsen, Eric H.; Rest, Armin; Sako, Masao; Smith, Matthew Wilson L.; Smith, Nathan D.; Sobreira, Flávia; Walker, Alistair; Yanny, Brian; Abbott, Timothy M. C.; Abdalla, Filipe B.; Allam, Sahar S.; Benoit-Lévy, Aurélien; Bernstein, Gary M.; Bertin, Emmanuel; Buckley-Geer, Elizabeth; Burke, David Lyle; Capozzi, Diego; Carnero Rosell, Aurelio; Carrasco Kind, Matías; Carretero Palacios, Jorge; Castander Serentill, Francisco Javier; Cenko, Stephen Bradley; Crocce, Martin; Cunha, Carlos Eduardo; D'Andrea, Christopher B.; Costa, Luiz N. da; Desai, S.; Dietrich, Jörg P.; Eifler, Tim; Evrard, August E.; Fernández, Eva María; Fischer, John A.; Fong, Wenfai; Fosalba Vela, Pablo; Fox, Derek B.; Fryer, Chris L.; García-Bellido, Juan; Gaztañaga, Enrique; Gerdes, David W.; Goldstein, Daniel Abraham; Gruen, Daniel; Gutierrez, Gaston R.; Honscheid, K.; James, David J.; Karliner, Inga; Kasen, Daniel N.; Kent, Stephen M.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Lahav, Ofer; Li, T. S.; Lima, Marcos Vinicius Borges Teixeira; Maia, Marcio Antonio Geimba; Martini, Paul; Metzger, Brian D.; Miller, Christopher J.; Miquel, Ramon; Mohr, Joseph J.; Nichol, Robert C.; Nord, Brian Dennis; Ogando, Ricardo L.C.; Peoples, John; Petravick, Donald L.; Plazas Malagón, Andrés Alejandro; Quataert, Eliot J.; Romer, Anita K.; Roodman, Aaron; Rykoff, Eli; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Scarpine, Victor Emanuel; Schindler, Rafe H.; Schubnell, Michael; Sevilla Noarbe, Ignacio; Sheldon, Erin; Smith, Robert Christopher; Stebbins, Albert J.; Swanson, Molly E. C.; Tarle, Gregory; Thaler, Jon J.; Thomas, Rollin C.; Tucker, Douglas L.; Vikram, Vinu; Wechsler, Risa H.; Weller, Jochen; Wester, William Carl; DES Collaboration (2016) [Journal article]
      The collapse of a stellar core is expected to produce gravitational waves (GWs), neutrinos, and in most cases a luminous supernova. Sometimes, however, the optical event could be significantly less luminous than a supernova ...
    • Dark Energy Survey Year 1 results : cosmological constraints from galaxy clustering and weak lensing 

      Abbott, Timothy M. C.; Santiago, Basilio Xavier; DES Collaboration (2018) [Journal article]
      We present cosmological results from a combined analysis of galaxy clustering and weak gravitational lensing, using 1321 deg2 of griz imaging data from the first year of the Dark Energy Survey (DES Y1).We combine three ...
    • Dark Energy Survey Year 1 results : measurement of the baryon acoustic oscillation scale in the distribution of galaxies to redshift 1 

      Abbott, Timothy M. C.; Santiago, Basilio Xavier; DES Collaboration (2019) [Journal article]
      We present angular diameter distance measurements obtained by locating the baryon acoustic oscillations (BAO) scale in the distribution of galaxies selected from the first year of Dark Energy Survey data. We consider a ...
    • Dark Energy Survey Year 1 results : redshift distributions of the weak-lensing source galaxies 

      Hoyle, Ben; Santiago, Basilio Xavier; DES Collaboration (2018) [Journal article]
      We describe the derivation and validation of redshift distribution estimates and their uncertainties for the populations of galaxies used as weak-lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. ...
    • Datação de processos diagenéticos em arenitos-reservatório de hidrocarbonetos : uma revisão conceitual 

      Maraschin, José Anderson; Mizusaki, Ana Maria Pimentel (2008) [Journal article]
      Geochronology has became a powerfull tool for diagenetic studies in siliciclastic rocks as it supply parameters for the definition of their depositional or diagenetic ages. This development occurred particularly in the ...
    • Dating star clusters in the Small Magellanic Cloud by means of integrated spectra 

      Ahumada, Andrea Veronica; Claria Olmedo, Juan Jose; Bica, Eduardo Luiz Damiani; Dutra, Carlos Maximiliano (2002) [Journal article]
      In this study flux-calibrated integrated spectra in the range (3600–6800) Å are presented for 16 concentrated star clusters in the Small Magellanic Cloud (SMC), approximately half of which constitute unstudied objects. We ...
    • DB white dwarfs in the Sloan Digital Sky Survey data release 10 and 12 

      Koester, Detlev; Kepler, Souza Oliveira (2015) [Journal article]
      Aims. White dwarfs with helium-dominated atmospheres (spectral types DO, DB) comprise approximately 20% of all white dwarfs. There are fewer studies than of their hydrogen-rich counterparts (DA) and thus several questions ...
    • Deciphering 40 TeV rapidity gap physics with 2 TeV jet events 

      Chehime, H.; Gay Ducati, Maria Beatriz; Duff, A.; Halzen, Francis; Natale, Adriano Antonio; Stelzer, T.; Zeppenfeld, D. (1992) [Journal article]
      Rapidity gaps may provide an adequate signature for electroweak processes at supercolliders, including the production of the Higgs particle. We show how this important issue can be studied in the dijet final states of ...
    • Decodificando o código de barras 

      Rodrigues, Luís Gustavo Pires; Heidemann, Leonardo Albuquerque; De Carli, Eloir; Silveira, Lucas Gabriel Mota da (2011) [Journal article]
    • Decomposição catalítica de óxidos de nitrogênio 

      Cónsul, Julia Maria Diaz; Thiele, Daniel; Cataluña Veses, Renato; Baibich, Ione Maluf (2004) [Journal article]
      Contaminant gases in the atmosphere constitute an important problem to be solved in the world. The NOx gases produced as a consequence of engine high temperatures are deleterious to environment and human health, as they ...
    • Decomposição do NO sobre Cu suportado em zeólitas 

      Oliveira, Andréa Marins de; Pergher, Sibele Berenice Castellã; Moro, Celso Camilo; Baibich, Ione Maluf (2004) [Journal article]
      Direct decomposition of NO on copper supported on zeolite catalysts such as MCM-22 and Beta was compared with that on the thoroughly studied Cu-ZSM-5. The catalysts were prepared by ion-exchange in basic media. They were ...
    • Decreases in procalcitonin and C-reactive protein are strong predictors of survival in ventilator-associated pneumonia 

      Seligman, Renato; Meisner, Michael; Lisboa, Thiago Costa; Hertz, Felipe Teixeira; Filippin, Tania B.; Fachel, Jandyra Maria Guimarães; Teixeira, Paulo Jose Zimermann (2006) [Journal article]
      Introduction This study sought to assess the prognostic value of the kinetics of procalcitonin (PCT), C-reactive protein (CRP) and clinical scores (clinical pulmonary infection score (CPIS), Sequential Organ Failure ...
    • Deep colour-magnitude diagrams of LMC field stars imaged with HST 

      Castro, Rodrigo; Santiago, Basilio Xavier; Gilmore, Gerard Fitzgerald; Beaulieu, Sylvie F.; Johnson, Rachel A. (2001) [Journal article]
      We present deep photometry …V < ~26† in V and I bands obtained with the Wide Field and Planetary Camera 2 on board the Hubble Space Telescope for 7 fields ~5◦ away from the Large Magellanic Cloud centre. The fields contain, ...
    • Deep imaging of Virgo Z : not a nearby ultrafaint dwarf galaxy, but a distant compact group of galaxies 

      Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Ortolani, Sergio; Souza, André Lopes de (2013) [Journal article]
      Context. The search for Milky Way faint satellite galaxies and star clusters has been intensified in recent years thanks to the Sloan Digital Sky Survey (SDSS), and other efforts to verify candidate objects. Aims. We ...
    • Deeply virtual Compton scattering and saturation approach 

      Favart, Laurent; Machado, Magno Valério Trindade (2003) [Journal article]
      We investigate the deeply virtual Compton scattering (DVCS) in the color dipole approach, implementing the dipole cross section through the saturation model, which interpolates successfully between soft and hard regimes. ...
    • Deep SOAR follow-up photometry of two Milky Way outer-halo companions discovered with Dark Energy Survey 

      Luque Canaza, Elmer Fidel; Santiago, Basilio Xavier; Pieres, Adriano; Queiroz, Anna Bárbara de Andrade; Dal Ponte, Marina; Thomas, D. (2018) [Journal article]
      We report the discovery of a new star cluster, DES 3, in the constellation of Indus, and deeper observations of the previously identified satellite DES J0222.7−5217 (Eridanus III). DES 3 was detected as a stellar overdensity ...
    • Deep surface photometry of edge-on spirals in Abell galaxy clusters constraining environmental effects 

      Santiago, Basilio Xavier; Vale, Tibério Borges (2008) [Journal article]
      Two galaxies have a horizontal profile with a strong down-turn at outer radii, preventing a simple exponential from fitting the entire range. For the 2 early-type spirals, the thick discs have larger scalelengths than the ...