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Autor:
Geórgia Amaral Mothé, Marcelo Silva Sthel, Marcenilda Amorim Lima, Marcelo Gomes da Silva, Maria Priscila Pessanha de Castro, I.A. Esquef
Publikováno v:
Environmental Science and Pollution Research. 26:35082-35093
The replacement of fossil-based fuels by renewable fuels (biofuels) was proposed in the IPCC report, as an alternative to reduce greenhouse gas emission and reach out to a low-carbon economy. On this perspective, the Brazilian government had implemen
Publikováno v:
IEEE Latin America Transactions. 6:477-483
Image analysis usually refers to processing of images with the goal of finding objects presented in the image. Image segmentation is one of the most critical tasks in automatic image analysis. The non-extensive entropy, also known as Tsallis entropy,
Autor:
A. A. Andrade, Roberto Weider de Assis Franco, E. F. da Silva, Virgílio de Carvalho dos Anjos, Elder A. de Vasconcelos, Maria José Valenzuela Bell, R.T. Faria, I.A. Esquef, Maria Priscila Pessanha de Castro
Publikováno v:
Materials Science Forum. :703-706
In this paper we combine the use of photo-thermal techniques, Thermal lens (TL) spectrometry, Photoacoustic and heat capacity measurements to determine the optical path dependence with temperature (ds/dT) of a polycrystalline 3C-SiC sample. Results o
Publikováno v:
Measurement Science and Technology. 17:1385-1389
In this paper, we describe a new, simple and fast photothermal method for characterizing the quality of natural gas used as automobile fuel. The method consists essentially in measuring the thermal properties of a sequence of natural gas diluted in n
Autor:
Maria Priscila Pessanha de Castro, I.A. Esquef, E.A. de Vasconcelos, R.T. Faria, Virgílio de Carvalho dos Anjos, A. A. Andrade, Roberto Weider de Assis Franco, Maria José Valenzuela Bell, E. F. da Silva
Publikováno v:
Microelectronics Journal. 36:977-980
In this paper we report the use of photothermal techniques such as Thermal lens (TL) spectrometry, Photoacoustic and heat capacity, rcp, to determine the thermo-optical parameters, such as thermal conductivity (K), thermal diffusivity (D), specific h
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 23:115-118
Hardmetal is usually processed by the conventional powder technology techniques: mix of WC + Co powders, compacting, and liquid phase sintering. A new method to process hardmetal parts is hereby described. Parts of WC–15% wt Co were processed by us
Publikováno v:
Pattern Recognition Letters. 25:1059-1065
Image analysis usually refers to processing of images with the goal of finding objects presented in the image. Image segmentation is one of the most critical tasks in automatic image analysis. The nonextensive entropy is a recent development in stati
Publikováno v:
The European Physical Journal Special Topics. 153:431-433
In this paper we describe a new, simple and fast photothermal method for characterizing simultaneously the thermal diffusivity and thermal effusivity. The improved PTGA essentially combines a photoacoustic cell and a thermal wave pyroelectric cell en
Autor:
Guerold Sergueevitch Bobrovnitchii, R.T. Faria, F.A.L. Machado, Helion Vargas, I.A. Esquef, Marcello Filgueira, M.F. Rodrigues
Publikováno v:
Journal de Physique IV (Proceedings). 125:237-239
The open photoacoustic cell technique (OPC) was used in order to measure the thermal diffusivity of hardmetal. Parts of WC - 15%wt Co were processed by using high pressure - high temperature sintering. In addition to the thermal diffusivity, heat cap