Listar Ciencias Exactas y Naturales por título
Mostrando ítems 2707-2726 de 5965
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Is artificial intelligence really a future trend in health care?
(2021) [Texto de presentación/conclusión] -
Is diffuse intracluster light a good tracer of the galaxy cluster matter distribution?
(2021) [Artículo de periódico]We explore the relation between diffuse intracluster light (central galaxy included) and the galaxy cluster (baryonic and dark) matter distribution using a sample of 528 clusters at 0.2 ≤ z ≤ 0.35 found in the Dark Energy ... -
Ising model with isotropic competing interactions in the presence of a field : a tricritical-lifshitz-point realization
(1993) [Artículo de periódico]We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. On the basis of an e expansion, we demonstrate that for small values of the external field H, the ... -
Ising nematic phase in ultrathin magnetic films : a Monte Carlo study
(2006) [Artículo de periódico]We study the critical properties of a two-dimensional Ising model with competing ferromagnetic exchange and dipolar interactions, which models an ultrathin magnetic film with high out-of-plane anisotropy in the monolayer ... -
Ising spin glass in a random network with a Gaussian random field
(2021) [Artículo de periódico]We investigate thermodynamic phase transitions of the joint presence of spin glass (SG) and random field (RF) using a random graph model that allows us to deal with the quenched disorder. Therefore, the connectivity becomes ... -
Is J 133658.3-295105 a radio source at z ≥= 1.0 or at the distance of M 83?
(2008) [Artículo de periódico]We present Gemini optical imaging and spectroscopy of the radio source J 133658.3–295105. This source has been suggested to be the core of an FR II radio source with two detected lobes. J 133658.3–295105 and its lobes are ... -
Isolating the pre-main sequence in Collinder 34, NGC 3293, NGC 3766 and NGC 6231
(2015) [Artículo de periódico]We employed field star decontaminated TwoMicron All Sky Survey photometry to study four nearby optical embedded clusters – Collinder 34, NGC 3293, NGC 3766 and NGC 6231 – obtaining deep colour–magnitude diagrams and stellar ... -
Isolation and identification of toxic chlorinated organic compounds present in black liquor of bleached cellulose pulp from Southern Brazil
(1989) [Artículo de periódico]Chemical components of untreated black liquor of cellulose pulp from Southern Brazil were extracted using macromolecular XAD-4 resin. The following compounds were identified qualitatively and/or quantitatively by capillary ... -
Isomer shift and electronegativy in compounds of tin and group -VI elements
(1970) [Artículo de periódico]Using the Mössbauer effect in 119Sn we have measured the isomer shift in compounds of divalent and tetravalent tin with elements of Group VI. The isomer shift is linearly dependent on the values of electronegativity in ... -
Isometrias e Geogebra : o papel do arrastar na construção de conceitos
(2018) [Artículo de periódico]Neste trabalho discute-se o potencial dos ambientes de geometria dinâmica para a construção de conceitos de isometrias. Debate-se o papel da ação de arrastar na manipulação de atividades dinâmicas sobre isometrias com a ... -
Isospin effects and the density dependence of the nuclear symmetry energy
(2009) [Artículo de periódico]The density dependence of the nuclear symmetry energy is inspected using the statistical multifragmentation model with Skyrme effective interactions. The model consistently considers the expansion of the fragments' volumes ... -
Isothermal adsorption of polyampholytes on charged nanopatterned surfaces
(2019) [Artículo de periódico]We investigate the adsorption of neutral polyampholytes on charged nanopatterned surfaces. The surfaces have charged domains but are overall neutral. To perform efficient simulations, we use an approach which combines the ... -
Isothermal binodal curves near a critical endpoint
(2001) [Artículo de periódico]Thermodynamics in the vicinity of a critical endpoint with nonclassical exponents α, β, γ, δ, … , is analyzed in terms of density variables (mole fractions, magnetizations, etc.). The shapes of the isothermal binodals or ... -
Isotopic substitution of N, O, and Si in the thermal oxidation of nitrogen-deposited silicon
(1999) [Artículo de periódico]Nitrogen was deposited on the surface of Si~100! wafers by ion implantation at a very low energy (approximately 20 eV), at fluences between 1 and 1031014 cm22. The samples were thermally oxidized in dry O2 at temperatures ... -
Isotopic substitution of si during thermal growth of ultrathin silicon-oxide films on si(111) in o/sub 2/
(1999) [Artículo de periódico]The transport of Si atoms during thermal growth of silicon-oxide films on silicon in dry O2 was investigated by isotopic substitution of Si. The experiment consisted of depositing a 7.6-nm-thick epitaxial layer of 29Si on ... -
Isotopic tracing during rapid thermal growth of silicon oxynitride films on Si in O2, NH3, and N2O
(1997) [Artículo de periódico]We performed isotopic tracing of O, N, and H during rapid thermal growth of silicon oxynitride films on silicon in two different sequential, synergistic gas environments: O2, followed by NH3, then followed by N2O; and N2O, ... -
Isótopos de carbono em filitos carbonosos da sequência metavulcano-sedimentar Marmeleiro, Sul de Ibaré, Rio Grande do Sul
(2003) [Artículo de periódico]Carbon isotope ratios for carbonaceous material in the graphite prospect of Marmeleiro Sequence, southwestern of the Sul-rio-grandense Shield, have been determined. The results are approximately constant with d13C-values ... -
Is the emergence of fungal resistance to medical triazoles related to their use in the agroecosystems? : a mini review
(2016) [Artículo de periódico]Triazole fungicides are used broadly for the control of infectious diseases of both humans and plants. The surge in resistance to triazoles among pathogenic populations is an emergent issue both in agriculture and medicine. ... -
Iteration of mappings and fixed points in mixid spectrum analysis
(1992) [Artículo de periódico] -
IUE temperatures for white dwarf stars in and around the ZZ ceti instability strip
(1993) [Artículo de periódico]We have analyzed ali the archival IUE images of the DA4 and DAS white dwarfs with model atmosphere fluxes incorporating the quasimolecular opacities to obtain a consistent set of temperatures for both the variables and ...