Browsing Exact and Earth Sciences by Title
Now showing items 1065-1084 of 5712
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Dados comparativos sobre a evasão em física, matemática, química e biologia da Universidade Estadual de Londrina : 1996 a 2004
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(2011) [Journal article] -
Decomposição catalítica de óxidos de nitrogênio
(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
(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
(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, ...