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Antonio Jefferson S. Machado
Researcher at University of São Paulo
Publications - 34
Citations - 513
Antonio Jefferson S. Machado is an academic researcher from University of São Paulo. The author has contributed to research in topics: Superconductivity & Electrical resistivity and conductivity. The author has an hindex of 7, co-authored 34 publications receiving 424 citations.
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Modeling hourly diffuse solar-radiation in the city of São Paulo using a neural-network technique
Jacyra Soares,Amauri Pereira de Oliveira,Marija Zlata Božnar,Primož Mlakar,João Francisco Escobedo,Antonio Jefferson S. Machado +5 more
TL;DR: In this paper, a perceptron neural-network technique is applied to estimate hourly values of the diffuse solar-radiation at the surface in Sao Paulo City, Brazil, using as input the global solar radiation and other meteorological parameters measured from 1998 to 2001.
Journal ArticleDOI
Correlation models of diffuse solar-radiation applied to the city of Sao Paulo, Brazil
Amauri Pereira de Oliveira,João Francisco Escobedo,Antonio Jefferson S. Machado,Jacyra Soares +3 more
TL;DR: In this paper, the authors developed correlation models to estimate hourly, daily and monthly values of diffuse solar-radiation on horizontal surfaces and compared them with other places in the world, showing some differences related mainly to altitude effects.
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A New Shadow-Ring Device for Measuring Diffuse Solar Radiation at the Surface
TL;DR: In this paper, a shadow-ring device for measuring diffuse solar radiation at the surface is presented, where the seasonal variation of shadow is followed by moving the detector horizontally, which facilitates its application for long and continuous periods of time.
Journal ArticleDOI
Evidence for topological behavior in superconducting Cu x ZrTe 2 -y
Antonio Jefferson S. Machado,N. P. Baptista,B. S. de Lima,N. Chaia,T. Grant,T. Grant,Laís Corrêa,Sergio Tuan Renosto,A. C. Scaramussa,R. F. Jardim,M. S. Torikachvili,J. Albino Aguiar,O. C. Cigarroa,Luiz T.F. Eleno,Zachary Fisk +14 more
TL;DR: In this article, structural, magnetic, electrical, thermal transport, Hall coefficient, and pressure-dependent resistivity measurements were performed on compounds with values between 0.05, 0.15, and 0.3 GPa.
Journal ArticleDOI
Properties and superconductivity in Ti-doped NiTe2 single crystals
B. S. de Lima,R.R. de Cassia,F.B. Santos,L. E. Correa,T.W. Grant,A. L. R. Manesco,G.W. Martins,Luiz T.F. Eleno,M. S. Torikachvili,Antonio Jefferson S. Machado +9 more
TL;DR: In this article, the authors investigated the physical properties of a new candidate for type-II Dirac semimetal and investigated the effect of titanium doping on the properties of Ti-doped single crystalline samples of NiTe2.