Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Alfredo José Barreto Luiz"'
Autor:
Mariana Silveira Guerra Moura e Silva, Alfredo José Barreto Luiz, Marcos Eliseu Losekann, Hamilton Hisano
Publikováno v:
Acta Limnologica Brasiliensia, Vol 35 (2023)
Abstract Aim In the present study, the structure of the benthic invertebrates in ponds in the presence and absence of Nile tilapia was evaluated. Methods The benthic macroinvertebrates and physicochemical parameters were analyzed for a period of eigh
Externí odkaz:
https://doaj.org/article/11505f7321be4e96ba7074e593e01c73
Autor:
Magda Aparecida de Lima, Rosana Faria Vieira, Alfredo José Barreto Luiz, José Abrahão Haddad Galvão
Publikováno v:
Agronomía Colombiana, Vol 41, Iss 1 (2023)
Paddy fields are major sources of greenhouse gases, mainly methane (CH4) and nitrous oxide (N2O). Defining the sampling times for determining the average diurnal emission rates is an important step in optimizing field measurement, avoiding the influe
Externí odkaz:
https://doaj.org/article/e7771e7ff8814211879502803856fa91
Publikováno v:
Journal of Asian Rural Studies, Vol 4, Iss 1, Pp 1-22 (2020)
There is a popular myth or fallacy based on the idea that organic fruits and vegetables are always more expensive than conventional products. To assess whether this statement is true, a qualitative and quantitative research was conducted between Sept
Externí odkaz:
https://doaj.org/article/bb6c85ea665d4752b8b3dab1588c1c39
Autor:
Bruno Schultz, Markus Immitzer, Antonio Roberto Formaggio, Ieda Del’ Arco Sanches, Alfredo José Barreto Luiz, Clement Atzberger
Publikováno v:
Remote Sensing, Vol 7, Iss 11, Pp 14482-14508 (2015)
Only well-chosen segmentation parameters ensure optimum results of object-based image analysis (OBIA). Manually defining suitable parameter sets can be a time-consuming approach, not necessarily leading to optimum results; the subjectivity of the man
Externí odkaz:
https://doaj.org/article/b33baa455a664bd2afdb1fc5722d8ad9
Autor:
Isaque Daniel Rocha Eberhardt, Alfredo José Barreto Luiz, Antonio Roberto Formaggio, Ieda Del'Arco Sanches
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 50, Iss 7, Pp 605-614 (2015)
Resumo: O objetivo deste trabalho foi desenvolver um método para identificação e monitoramento, em tempo quase real, de áreas agrícolas cultivadas com lavouras temporárias de verão, com uso de imagens orbitais Modis, no Estado do Rio Grande do
Externí odkaz:
https://doaj.org/article/110cece2ec684463b90bdf410a26d30e
Autor:
Bruno Schultz, Antonio Roberto Formaggio, Isaque Daniel Rocha Eberhardt, Ieda Del'Arco Sanches, Julio Cesar de Oliveira, Alfredo José Barreto Luiz
Publikováno v:
Revista Brasileira de Cartografia, Vol 68, Iss 1 (2016)
A presente pesquisa teve por objetivo avaliar a potencialidade de dados multitemporais Landsat para classiï¬cação de cana-de-açúcar e de soja, conjuntamente, quando realizada via Análise de Imagens Orientada a Objetos (OBIA/ Random Forest). Fo
Externí odkaz:
https://doaj.org/article/9424d285995b46a78107f96bf6629ef3
Autor:
Alfredo José Barreto Luiz, Antônio Roberto Formaggio, José Carlos Neves Epiphanio, John Mauricio Arenas‑Toledo, Elizabeth Goltz, Daniela Brandão
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 47, Iss 9, Pp 1279-1287 (2012)
O objetivo deste trabalho foi desenvolver e avaliar um método para estimar a área plantada de soja em escala regional e calcular o erro estatístico associado à estimação. O método (Geosafras), que associa técnicas de amostragem estatística c
Externí odkaz:
https://doaj.org/article/5363a19a97bf47a699a23578e44b3ef2
Autor:
Rui Dalla Valle Epiphanio, Antonio Roberto Formaggio, Bernardo Friedrich Theodor Rudorff, Eduardo Eiji Maeda, Alfredo José Barreto Luiz
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 45, Iss 1, Pp 72-80 (2010)
The objective of this work was to evaluate the application of the spectral-temporal response surface (STRS) classification method on Moderate Resolution Imaging Spectroradiometer (MODIS, 250 m) sensor images in order to estimate soybean areas in Mato
Externí odkaz:
https://doaj.org/article/dc4ab89562b64f52b5ed96a6953f3ecd
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 35, Iss 1, Pp 83-91 (2000)
O principal objetivo deste trabalho foi verificar se a suposição de predominância da agricultura familiar na microbacia do Taquara Branca, Sumaré, SP, poderia ser sustentada com base em informações concretas. Foi possível a utilização de amo
Externí odkaz:
https://doaj.org/article/9e2dc2b0df3848c4b3f65cfb4f59b42d
Autor:
Isaque Daniel Rocha Eberhardt, Bruno Schultz, Rodrigo Rizzi, Ieda Del’Arco Sanches, Antonio Roberto Formaggio, Clement Atzberger, Marcio Pupin Mello, Markus Immitzer, Kleber Trabaquini, William Foschiera, Alfredo José Barreto Luiz
Publikováno v:
Remote Sensing, Vol 8, Iss 3, p 219 (2016)
The potential of optical remote sensing data to identify, map and monitor croplands is well recognized. However, clouds strongly limit the usefulness of optical imagery for these applications. This paper aims at assessing cloud cover conditions over
Externí odkaz:
https://doaj.org/article/4a493bc62bdf49c4b0aa393d1b625747