Navegação Ciências Exatas e da Terra por Título
Resultados 1104-1123 de 5965
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Curva de crescimento usando modelo misto : uma aplicação na progressão da doença de Machado-Joseph
(2009) [Artigo de periódico]Introdução: A obtenção dos dados por meio de medidas repetidas em diversas ocasiões no tempo em um mesmo sujeito torna possível o ajuste de curvas que descrevam padrões de evolução e identificam preditores de evolução. O ... -
Curvature-driven coarsening in the two-dimensional Potts model
(2010) [Artigo de periódico]We study the geometric properties of polymixtures after a sudden quench in temperature. We mimic these systems with the q-states Potts model on a square lattice with and without weak quenched disorder, and their evolution ... -
Curvature-driven growth and interfacial noise in the voter model with self-induced zealots
(2022) [Artigo de periódico]We introduce a variant of the voter model in which agents may have different degrees of confidence in their opinions. Those with low confidence are normal voters whose state can change upon a single contact with a different ... -
Cytological and genome size data analyzed in a phylogenetic frame : evolutionary implications concerning Sisyrinchium taxa (Iridaceae: Iridoideae)
(2018) [Artigo de periódico]Sisyrinchium is the largest genus of Iridaceae in the Americas and has the greatest amount of cytological data available. This study aimed at investigating how genomes evolved in this genus. Chromosome number, genome size ... -
Dados comparativos sobre a evasão em física, matemática, química e biologia da Universidade Estadual de Londrina : 1996 a 2004
(2006) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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) [Artigo de periódico]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 ... -
Dataset of metals and metalloids in food crops and soils sampled across the mining region of Moquegua in Peru
(2023) [Artigo de periódico]In recent years, there has been an increase in interest in the accumulation of heavy metals and metal(loid)s (HMM) in areas where agriculture and mining exist side by side. As a contribution to this body of knowledge, we ... -
Dating star clusters in the Small Magellanic Cloud by means of integrated spectra
(2002) [Artigo de periódico]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) [Artigo de periódico]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, ...
