Browsing Exact and Earth Sciences by Title

Now showing items 1065-1084 of 5712

    • 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 ...

    • Da Lei de Titius-Bode ao embate entre a Matéria Escura e a Dinâmica de Newton Modificada uma trajetória epistemológica pela Astronomia 

      Lima, Nathan Willig; Alves-Brito, Alan; Nascimento, Matheus Monteiro (2022) [Journal article]
      Nos cursos de licenciatura, usualmente, as discussões sobre Epistemologia são feitas de forma desconectada das discussões técnicas, muitas vezes realizadas apenas em disciplinas específicas. Buscando romper com esse abismo ...

    • 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 cluster abundances, weak lensing, and galaxy correlations 

      To, Chun-Hao; Santiago, Basilio Xavier; DES Collaboration (2021) [Journal article]
      We present the first joint analysis of cluster abundances and auto or cross-correlations of three cosmic tracer fields: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness. From ...

    • 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. ...

    • Dark Energy Survey Year 3 results : cosmological constraints from galaxy clustering and galaxy-galaxy lensing using the MAGLIM lens sample 

      Porredon, Anna; Santiago, Basilio Xavier; DES Collaboration (2022) [Journal article]
      The cosmological information extracted from photometric surveys is most robust when multiple probes of the large scale structure of the Universe are used. Two of the most sensitive probes are the clustering of galaxies and ...

    • 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 ...

    • Data release 2 of S-PLUS : accurate template-fitting based photometry covering ∼1000 deg2 in 12 optical filters 

      Fernandes, Felipe de Almeida; Bonatto, Charles Jose; Chies-Santos, Ana Leonor; Hartmann, Eduardo Albuquerque; Oliveira, Claudia Lucia Mendes de (2022) [Journal article]
      The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey of ∼9300 deg2 in the southern sky in a 12-band photometric system. This paper presents the second data release (DR2) of S-PLUS, consisting of 514 ...

    • 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 ...

    • David Bloor e o “programa forte” da sociologia da Ciência : um debate sobre a natureza da Ciência 

      Massoni, Neusa Teresinha; Moreira, Marco Antonio (2020) [Journal article]
      Neste trabalho são analisados enunciados produzidos por 20 professores de física em uma atividade proposta durante um curso de extensão à distância. A partir da leitura de um texto acadêmico, os professores deveriam postar, ...

    • 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 ...

    • Decreased expression of the thyroid hormone‑inactivating enzyme type 3 deiodinase is associated with lower survival rates in breast cancer 

      Goemann, Iuri Martin; Marczyk, Vicente Rodrigues; Recamonde-Mendoza, Mariana; Wajner, Simone Magagnin; Graudenz, Márcia Silveira; Maia, Ana Luiza Silva (2020) [Journal article]
      Thyroid hormones (THs) are critical regulators of cellular processes, while changes in their levels impact all the hallmarks of cancer. Disturbed expression of type 3 deiodinase (DIO3), the main TH-inactivating enzyme, ...