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Publicações - ciências exatas e da terra

Simulation of organic solar cells?s power conversion efficiency DOS SANTOS ROSA, EDUARDO HENRIQUE; Edemir Luiz Kowalski; RIBEIRO BARROZO TOLEDO, LUIZ FELIPE SOLAR ENERGY, v. 221, p. 483-487, 2021 DOI Home page Palavra-chave: Organic solar cells; P3HT: PCBM; Optical simulation Áreas do conhecimento: Ciências Exatas e da Terra; Física da Matéria Condensada; Prop. Óticas e Espectrosc. da Mat. Condens; Outras Inter. da Mat. com Rad. e Part. resumo ...
SIMULATION OF URBAN GROWTH: A CASE STUDY FOR CURITIBA CITY, BRAZIL FREITAS, ELIANA VIEIRA DE; Hideo Araki Boletim de Ciências Geodésicas, v. 27, n. spe, p. 1-15, 2021 DOI Áreas do conhecimento: Ciências Exatas e da Terra; Geodésia; Sistemas de Informações Geográficas resumo ... Abstract: The present work seeks to model the simulation of the landscape of the city of...
Simulation, optimization, and economic analysis of process to obtain esters from fatty acids MARGARIDA, BRUNA R.; FLORES, LUANA I.; HAMERSKI, FABIANE; VOLL, FERNANDO A. P.; Luiz Fernando L Lima Jr Biofuels Bioproducts & Biorefining-Biofpr, v. 1, p. 1 2021 DOI Palavra-chave: Simulation; kinetic modeling; esterification and transesterification; hydrous ethanol; Process optimization; economic analysis Áreas do conhecimento: Engenharias; Engenharia Elétrica; Telecomunicações; Engenharias; Engenharia Química; Processos Industriais de Engenharia Química; Processos Biotecnológicos; Ciências Exatas e da Terra; Ciência da Computação; Matemática da Computação; Modelos Analíticos e de Simulação resumo ... Waste oils are a very promising raw material in the biodiesel industry, which is why great efforts have focused on the removal of the free fatty acids (FFAs) present in this source, mainly through th...
SISTEMA PARA DISPOSITIVOS WEARABLES PARA RASTREAMENTO E MONITORAMENTO DE PESSOAS COM A DOENÇA DE ALZHEIMER Valdney Ferreira dos Santos; Sebastião Ribeiro Júnior REVISTA ELETRÔNICA MULTIDISCIPLINAR FACEAR, v. 1, p. 1-18, 2021 DOI Home page Palavra-chave: doença de Alzheimer; GPS; Wearables; Rastreamento; Monitoramento Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Sistemas de Informação resumo ...
Spit-Inlet migration and storm-driven stacking at Praia de Leste Holocene barrier, southern Brazil Marcelo Bogo; Rodolfo José Angulo; Maria Cristina de Souza; Rodolfo José Angulo; Rodolfo José Angulo; Rodolfo José Angulo; Rodolfo José Angulo MARINE GEOLOGY, v. 442, p. 106637 2021 DOI Home page Palavra-chave: Coastal barrier; sedimentary facies; gpr; OSL dating resumo ...
Stability in solution and chemoprotection by octadecavanadates(IV/V) in E. coli cultures Kahoana Postal; Francielli Sousa Santana; D. L. Hughes; RÜDIGER, ANDRÉ L.; Ribeiro, Ronny R.; Eduardo Lemos de Sá; Emanuel Maltempi de Souza; Jaisa Fernandes Soares; NUNES, GIOVANA G. JOURNAL OF INORGANIC BIOCHEMISTRY, v. 219, p. 111438 2021 DOI Home page Palavra-chave: octadecavanadates; Escherichia coli; Stability; Nuclear Magnetic Resonance; electron paramagnetic resonance; chemoprotection Áreas do conhecimento: Ciências Exatas e da Terra; Quimica Medicinal; Ciências Exatas e da Terra; Química; Quimica Bioinorganica; Ciências Exatas e da Terra; Química; Química Inorgânica; Química de Coordenação resumo ... Two mixed-valence octadecavanadates, (NH4)2(Me4N)5[VIV12VV6O42I]·Me4NI·5H2O (V18I) and [{K6(OH2)12VIV11VV7O41(PO4)·4H2O}n] (V18P), were synthesized an…
Strong chaotification and robust chaos in the Duffing oscillator induced by two-frequency excitation GUSSO, ANDRÉ; UJEVIC, SEBASTIAN; VIANA, R. L. NONLINEAR DYNAMICS, v. 103, n. 2, p. 1955-1967, 2021 DOI Palavra-chave: Osciladores Nao-Lineares Áreas do conhecimento: Ciências Exatas e da Terra; Física; Física Geral; Dinamica Nao-Linear e Caos resumo ... In this work, we demonstrate numerically that two-frequency excitation is an effective method to produce chaotification over very large regions of the parameter space for the Duffing oscillator with single- and double-well potentials. It is also shown that chaos is robust in the last case. Robust chaos is characterized by the existence of a single chaotic attractor which is not altered by changes in the system parameters. It is generally required for practical applications of chaos to prevent the effects of fabrication tolerances, external influences, and aging that can destroy chaos. After showing that very large and continuous regions in the parameter space develop a chaotic dynamics under two-frequency excitation for the double-well Duffing oscillator, we demonstrate that chaos is robust over these regions. The proof is based upon the observation of the monotonic changes in the statistical properties of the chaotic attractor when the system parameters are varied and by its uniqueness, demonstrated by changing the initial conditions. The effects of a second frequency in the single-well Duffing oscillator is also investigated. While a quite significant chaotification is observed, chaos is generally not robust in this case.
Study on optical, electrochemical and thermal properties of the Meldrum acid 5-aminomethylene derivative Antunes, J.A.; Luiz Everson da Silva; DE FARIA, J.L.B.; de Toledo, T.A.; Teixeira, A.M.R.; Ramos, R.J.; Freire, P.T.C.; Bento, R.R.F. VIBRATIONAL SPECTROSCOPY, v. 112, p. 103188 2021 DOI Palavra-chave: ácido de Méldrum; Cálculo ab-initio Áreas do conhecimento: Ciências Exatas e da Terra; Química; quimica do estado sólido resumo ...
Sub-horizon modes and growth index in a linear scalar cosmological perturbations Abraão Jessé Capistrano de Souza EUROPEAN PHYSICAL JOURNAL C, v. 81, n. 6, p. 1/550 2021 DOI Home page Palavra-chave: Dark energy; Teoria de Imersões: Teorema de Nash Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software resumo ... We test a four dimensional cosmological model embedded in a five dimensional bulk space by means of the dynamical Nash-Greene theorem. In a fluid approach, we apply a joint likelihood analysis to the data with the Markov Chain Monte Carlo (MCMC) method for cosmological parameter estimation. We use recent datasets as the “Gold 2018” growth-rate data, the Planck2018/ $$\varLambda $$ CDM data on the cosmic microwave background (CMB) anisotropies, the Baryon acoustic oscillations (BAO) measurements, the Pantheon Supernovae type Ia and the data on the Hubble parameter H(z) with redshift ranging from $$0.01< z < 2.3$$ . Performing the Information Criterion (IC) analysis, we find that the present model is in very good agreement with observations with a close statistical equivalence with wCDM cosmologies at 1- $$\sigma $$ level with a slightly larger growth profiles. By modifications of CLASS(EFCLASS) code, we make a comparison between the models on their unlensed CMB TT temperature spectra. Moreover, the proposed model presents a low power spectrum by the reduction of the ISW effect at lower multipoles. We also find that the overall percentage relative difference of the growth index $$\varDelta \gamma (\%)$$ is up to 1.4 $$\%$$ as compared to wCDM pattern in sub-horizon scales.
Subhorizon linear Nash-Greene perturbations with constraints on and the deceleration parameter Abraão Jessé Capistrano de Souza; Paola Terezinha Zanolla Seidel; Hemerson R. Duarte Physics of the Dark Universe, v. 31, p. 100760 2021 DOI Home page Palavra-chave: Cosmologia; Dark energy Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software resumo ... The Hubble parameter H(z), as a function of redshift, is modified by the presence of a new term originated from the extrinsic curvature in a four embe…

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