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16 results on '"Faria, Rafael de Oliveira"'

2. Unveiling microtubule dynamics in lung cancer: Recent findings and prospects for drug delivery and treatment

Author

Yukuyama, Megumi Nishitani, de Souza, Aline, Henostroza, Mirla Anali Bazán, de Araujo, Gabriel Lima Barros, Löbenberg, Raimar, Faria, Rafael de Oliveira, de Souza, Gabriel Batista, Guimaraes, Lara Mendes Ferreira, Lameu, Claudiana, Folchini, Beatriz Rabelo, Peroni, Camilla Midori, Oliveira, Isabela Fernandes, Miyagi, Mariana Yasue Saito, and Bou-Chacra, Nádia Araci

Published
2023
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4. Remotely Piloted Aircraft for Evaluating the Impact of Frost in Coffee Plants: Interactions between Plant Age and Topography.

Author

Valente, Gislayne Farias, Ferraz, Gabriel Araújo e Silva, Schwerz, Felipe, Faria, Rafael de Oliveira, Fernandes, Felipe Augusto, and Marin, Diego Bedin

Subjects
EXTREME weather, PEARSON correlation (Statistics), DRONE aircraft, COFFEE plantations, MULTISPECTRAL imaging
Abstract

An accurate assessment of frost damage in coffee plantations can help develop effective agronomic practices to cope with extreme weather events. Remotely piloted aircrafts (RPA) have emerged as promising tools to evaluate the impacts caused by frost on coffee production. The objective was to evaluate the impact of frost on coffee plants, using vegetation indices, in plantations of different ages and areas of climatic risks. We evaluated two coffee plantations located in Brazil, aged one and two years on the date of frost occurrence. Multispectral images were collected by a remotely piloted aircraft, three days after the occurrence of frost in July 2021. The relationship between frost damage and these vegetation indices was estimated by Pearson's correlation using simple and multiple linear regression. The results showed that variations in frost damage were observed based on planting age and topography conditions. The use of PRA was efficient in evaluating frost damage in both young and adult plants, indicating its potential and application in different situations. The vegetation index MSR and MCARI2 indices were effective in assessing damage in one-year-old coffee plantations, whereas the SAVI, MCARI1, and MCARI2 indices were more suitable for visualizing frost damage in two-year-old coffee plantations. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Optimized Walking Route Method for Precision Coffee Farming.

Author

Faria, Rafael de Oliveira, Silva, Fábio Moreira da, Ferraz, Gabriel Araújo e Silva, Oliveira e Silva, Mirian de Lourdes, Herrera, Miguel Angel Diaz, Soares, Daniel Veiga, and Marques Filho, Aldir Carpes

Subjects
*PRECISION farming, *CROPS, *CARTOGRAPHY software, *COFFEE growers, *SOIL sampling
Abstract

Coffee production has become increasingly technified in order to optimize the use of inputs and the sustainable use of natural resources. In this context, one way that farmers are investing in their coffee plantations is in the use of precision agriculture techniques, termed precision coffee farming. Over the last few years, research has been conducted to facilitate the application of this technology, and sampling grids with two points per hectare have been recommended by several studies. These georeferenced demarcations in a plot are generally shaped as equidistant squares or rectangles, and the sampling points are located at the centers of these areas. Coffee farmers typically plant their crops following the level line, which greatly hinders the navigation of equidistant points within the field. Thus, the objective of this study was to develop an optimized walking route method to reduce the distance for sampling soil, leaf, and yield attributes. The experimental plots were established in 2000 at Samambaia Farm, located in Santo Antônio do Amparo, Minas Gerais, Brazil, with coffee the cultivar Acaia IAC 479-19, totaling 56.65 ha. The 111 sampling points were distributed in the land following the new method proposed in this study, and, after walking simulations using Farm Works Mapping Software, the new method was compared with the conventional method using the mean displacement between points. The new optimized walking routes method reduced the mean distance traveled to sample the points by 50.1%. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Remotely Piloted Aircraft and Random Forest in the Evaluation of the Spatial Variability of Foliar Nitrogen in Coffee Crop

Author

Marin, Diego Bedin, primary, Ferraz, Gabriel Araújo e Silva, additional, Guimarães, Paulo Henrique Sales, additional, Schwerz, Felipe, additional, Santana, Lucas Santos, additional, Barbosa, Brenon Dienevam Souza, additional, Barata, Rafael Alexandre Pena, additional, Faria, Rafael de Oliveira, additional, Dias, Jessica Ellen Lima, additional, Conti, Leonardo, additional, and Rossi, Giuseppe, additional

Published
2021
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16. Mesenchymal stem cells from human adipose tissue and bone repair: a literature review

Author

Alonso-Goulart, Vivian, primary, Ferreira, Lorraine Braga, additional, Duarte, Cristiane Angélico, additional, Lima, Isabela Lemos de, additional, Ferreira, Enza Rafaela, additional, Oliveira, Bárbara Candido de, additional, Vargas, Luna Nascimento, additional, Moraes, Dayane Dotto de, additional, Silva, Isaura Beatriz Borges, additional, Faria, Rafael de Oliveira, additional, Souza, Aline Gomes de, additional, and Castro-Filice, Leticia de Souza, additional

Published
2018
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