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16 results on '"Rocha Vital, Benedito"'

1. Automatic identification of charcoal origin based on deep learning

Author

Rodrigues de Oliveira, Ricardo, primary, Ferreira Rodrigues, Larissa, additional, Mari, João Fernando, additional, Coelho Naldi, Murilo, additional, Gomes Milagres, Emerson, additional, Rocha Vital, Benedito, additional, Oliveira Carneiro, Angélica de Cássia, additional, Breda Binoti, Daniel Henrique, additional, Lopes, Pablo Falco, additional, and Garcia Leite, Helio, additional

Published
2021
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2. Automatic identification of charcoal origin based on deep learning

Author

de Oliveira Neto, Ricardo Rodrigues, Ferreira, Larissa, Mari, João Fernando, Coelho Naldi, Murilo, Gomes Milagres, Emerson, Rocha Vital, Benedito, Cassia Oliveira Carneiro, Angélica de, Henrique Breda Binoti, Daniel, Falco Lopes, Pablo, Garcia Leite, Helio, de Oliveira Neto, Ricardo Rodrigues, Ferreira, Larissa, Mari, João Fernando, Coelho Naldi, Murilo, Gomes Milagres, Emerson, Rocha Vital, Benedito, Cassia Oliveira Carneiro, Angélica de, Henrique Breda Binoti, Daniel, Falco Lopes, Pablo, and Garcia Leite, Helio

Abstract

The differentiation between the charcoal produced from (Eucalyptus) plantations and native forests is essential to control, commercialization, and supervision of its production in Brazil. The main contribution of this study is to identify the charcoal origin using macroscopic images and Deep Learning Algorithm. We applied a Convolutional Neural Network (CNN) using VGG-16 architecture, with preprocessing based on contrast enhancement and data augmentation with rotation over the training set images. on the performance of the CNN with fine-tuning using 360 macroscopic charcoal images from the plantation and native forests. The results pointed out that our method provides new perspectives to identify the charcoal origin, achieving results upper 95 % of mean accuracy to classify charcoal from native forests for all compared preprocessing strategies

Published
2021

3. Effect of thermal treatment variables on the thermogravimetric properties of eucalypt wood

Author

Nava Soratto, Déborah, Miguel Simões da Silva, Carlos, Rocha Vital, Benedito, Cassia Oliveira Carneiro, Angélica de, Jerásio Bianche, Juliana, Neto Boschetti, Walter Torezani, Pereira Freitas, Thaís, Ceccato Ferreira, Juliana, Nava Soratto, Déborah, Miguel Simões da Silva, Carlos, Rocha Vital, Benedito, Cassia Oliveira Carneiro, Angélica de, Jerásio Bianche, Juliana, Neto Boschetti, Walter Torezani, Pereira Freitas, Thaís, and Ceccato Ferreira, Juliana

Abstract

Thermal treatments have the effect of reducing the hygroscopicity and improving the resistance to microbiological attack of wood by the degradation of its chemical constituents. During the treatments, the mass of the wood is reduced, a factor that can affect the quality of the materials according to their use. The objective was to verify the effect of the thermal treatment variables on the thermogravimetric properties and the chemical composition of Eucalyptus grandis. The treatments were carried out in a vacuum oven with three atmosphere conditions - vacuum; N2; vacuum+N2 at temperatures of 140, 180 and 220 °C for 6 hours. It was observed that the mass loss during treatments differed only according to the temperatures used. The extractive content, total lignin and holocellulose presented significant changes only at 220°C in all three atmospheres. In the thermogravimetric analysis, the greatest value of residual mass was found in the treatment that used nitrogen and 220 °C, thus demonstrating that this treatment was more invasive, leading to the conclusion that the vacuum application can help to reduce the degradation of the constituents of the eucalypti wood. wood, which can lead to the production of thermally treated wood without great losses in the mechanical properties.

Published
2020

4. Energy valorization of woody biomass by torrefaction treatment: a brazilian experimental study

Author

Gusmão Figueiró, Clarissa, Rocha Vital, Benedito, Cassia Oliveira Carneiro, Angélica de, Miguel Simões da Silva, Carlos, Alves Magalhães, Mateus, de Freitas Fialho, Lucas, Gusmão Figueiró, Clarissa, Rocha Vital, Benedito, Cassia Oliveira Carneiro, Angélica de, Miguel Simões da Silva, Carlos, Alves Magalhães, Mateus, and de Freitas Fialho, Lucas

Abstract

Brazilian productivity of eucalyptus trees is one of the highest in the world, and it has sustainable and viable conditions to supply the demand for woody biomass in a large quantity and diversity. This favorable situation makes Brazil one of the countries with the greatest potential for the production development of torrefied woody biomass on a commercial scale. Torrefaction is a mild pyrolysis applied to increase the energy quality of the feedstock. The aim of this study was to evaluate the Brazilian potential of woody biomass torrefaction for energy purposes. An experimental study was performed evaluating this thermal treatment of eucalyptus wood chips on a semi-continuous screw reactor developed by a Brazilian university. The results showed the increases in the energy quality of eucalyptus wood chips as a function of torrefaction temperature and time. This thermal treatment was technically feasible for the hygroscopicity reduction and the increases of fixed carbon and calorific values of the woody biomass.

Published
2019

5. Produção e avaliação de briquetes compostos por diferentes proporções de resíduos sólidos urbanos.

Author

Moura de Souza, Marina, Clayton Barbosa, Admilson, Oliveira Carneiro, Angélica de Cássia, and Rocha Vital, Benedito

Abstract

Copyright of Nature & Conservation is the property of CBPC - Companhia Brasileira de Producao Cientifica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020
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6. Influência do diâmetro da madeira de eucalipto na produtividade e propriedades do carvão vegetal.

Author

Barros Donato, Danilo, de Cássia Oliveira Carneiro, Angélica, Macedo Carvalho, Ana Marcia Ladeira, Rocha Vital, Benedito, Gomes Milagres, Emerson, and Davel Canal, Wagner

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020
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7. Influência da temperatura de pirólise nas emissões gasosas, rendimentos e densidade do carvão vegetal.

Author

Melo Franco Neves Costa, Júlia, de Cássia Oliveira Carneiro, Angélica, Macedo Ladeira Carvalho, Ana Márcia, Gonçalves Jacovine, Laercio Antônio, Rocha Vital, Benedito, de Oliveira Araujo, Solange, and Davel Canal, Wagner

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020
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8. Potencial da desmetilação da lignina na produção de adesivo para colagem de lâminas de madeira.

Author

Paiva de Freitas, Fabiana, Silva de Jesus, Márcia, Rocha Vital, Benedito, Lima Abreu Veiga, Tais Regina, and Fonseca Xisto, Mariana

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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9. Adição de lignina Kraft à resina fenólica para a fabricação de compensados.

Author

Alves de Magalhães, Mateus, Rocha Vital, Benedito, Oliveira Carneiro, Angélica de Cássia, Simões da Silva, Carlos Miguel, de Freitas Fialho, Lucas, Gusmão Figueiró, Clarissa, and Ceccato Ferreira, Juliana

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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10. Estimativas de propriedades energéticas de pellets torrificados por meio de parâmetros colorimétricos.

Author

Alves de Magalhães, Mateus, Simões da Silva, Carlos Miguel, de Cássia Oliveira Carneiro, Angélica, Rocha Vital, Benedito, Lima Teixeira, Vinícius, de Freitas Fialho, Lucas, and Gusmão Figueiró, Clarissa

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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11. Avaliação da torrefação da madeira em curtos tempos de residência em um reator tipo rosca sem fim.

Author

Alves de Magalhães, Mateus, de Cássia Oliveira Carneiro, Angélica, Simões da Silva, Carlos Miguel, Rocha Vital, Benedito, Aredes Martins, Márcio, and Lelis Cândido, Welliton

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2018
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12. Physical and mechanical properties of heat treated wood from 'Aspidosperma populifolium', Dipteryx odorata and Mimosa scabrella

Author

de Oliveira Araújo, Solange, Rocha Vital, Benedito, Oliveira, Braulio, Cassia Oliveira Carneiro, Angélica de, Lourenço, Ana, Pereira, Helena, de Oliveira Araújo, Solange, Rocha Vital, Benedito, Oliveira, Braulio, Cassia Oliveira Carneiro, Angélica de, Lourenço, Ana, and Pereira, Helena

Abstract

Heat treatment improves some wood properties namely: equilibrium moisture, dimensional stability and durability and mechanical properties. In this study, the heat treatment was applied to woods of three natural species from Brazil: Aspidosperma populifolium (peroba mica), Dipteryx odorata (cumaru) and Mimosa scabrella (bracatinga). The woods were heated in an oven under vacuum and under nitrogen,at 180, 200, and 220°C for one hour. The untreated and heat-treated woods were characterized in relation to equilibrium moisture content, basic density, shrinkage, Janka hardness, and bending MOR and MOE according to NBR 7190 standards. All the thermal rectified woods showed a reduction in the hygroscopic equilibrium content, especially when the heating was under vacuum from 13-15% in the untreated woods to 1-3% for vacuum treatment at 220 °C. The dimensional stability was improved to only a small extent e.g. volumetric shrinkage tended to decrease with increasing temperature. Themechanical properties were affected differently for the three wood species. Heat-treated cumarushowed increased Janka hardness, MOR and MOE; and peroba mica increased MOR and MOE but not Janka hardness; while bracatinga was less influenced by the heat treatment.

Published
2016

14. EFEITO DO MATERIAL GENÉTICO E DO SÍTIO NA QUALIDADE DO CARVÃO VEGETAL DE MADEIRA DE CURTA ROTAÇÃO.

Author

de Cássia Oliveira Carneiro, Angélica, Rocha Vital, Benedito, Ulisses Frederico, Pedro Gustavo, de Freitas Fialho, Lucas, Gusmão Figueiró, Clarissa, and Simões da Silva, Carlos Miguel

Abstract

The aim of this study was to evaluate the effect of genetic material and the planting location on charcoal produced from eucalyptus wood from short rotation systems. It was evaluated five clones of Eucalyptus sp. from three municipalities of the state of Minas Gerais. Wood chip samples were charred in electric oven muffle, with heating rate of 1.67 °C/min and evaluated the following parameters of the resulting carbon: Yield charcoal, Proximate composition (fixed carbon, volatiles matter and ash), Density apparent and Higher heating value. Was noted that both variables - genetic material and planting location - had a significant effect on yield charcoal, in proximate composition and higher heating value. Already the coal density was not affected by any of the two variables. The yield and density were below the values reported in the literature for coal produced under the same laboratory conditions, with wood from conventional systems with older cut. In general, it can be observed the importance of assessing the potential for the production of coal individually. Furthermore, it was shown that clones of Eucalyptus spp. from short rotation systems are less suitable for charcoal production than conventional systems. [ABSTRACT FROM AUTHOR]

Published
2016
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15. INFLUÊNCIA DA ADIÇÃO DE LIGNINA KRAFT NAS PROPRIEDADES DE PELLETS DE EUCALIPTO.

Author

Corradi Pereira, Bárbara Luísa, de Cássia Oliveira Carneiro, Angélica, Ladeira Carvalho, Ana Márcia Macedo, Rocha Vital, Benedito, Costa Oliveira, Aylson, and Davel Canal, Wagner

Abstract

Copyright of Floresta is the property of Revista Floresta and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2016
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16. COMPOSIÇÃO QUÍMICA DA MADEIRA DE EUCALIPTO COM DIFERENTES NÍVEIS DE DESBASTE.

Author

Vinha Zanuncio, Antônio José, Colodette, Jorge Luiz, Borges Gomes, Fernando Jose, Oliveira Carneiro, Angélica de Cassia, and Rocha Vital, Benedito

Abstract

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2013

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