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| Registros recuperados: 115 | |
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| Estrada Herrera, Isabel del Rayo. |
| Con el propósito de analizar el potencial de captura en la parte aérea del sistema MIAF (Milpa Intercalada con Árboles Frutales) y PAP (Parcelas de Alta Productividad), los suelos más representativos fueron investigados y clasificados de acuerdo con los sistemas Taxonomía de Suelos (Soil Survey Staff, 2003) y WRB (FAO-ISRIC-SICS, 1999); de acuerdo con el primer sistema, los suelos de las tres microcuencas se clasificaron como Inceptisoles; los de las microcuenca Mazateca y Mixe, fueron Humic Dystrudepts y el de la Cuicateca Typic Hapludepts. De acuerdo al segundo, los dos primeros resultaron ser Umbrisoles con propiedades ferrálicas y el de la Cuicateca un Cambisol hiperferrálico. Otro objetivo de esta investigación fue estimar el contenido de carbono en... |
| Tipo: Tesis |
Palavras-chave: Carbono; Suelos; Clasificación; Biomasa aérea; Fraccionamiento; Maestría; Edafología; Carbon; Soils; Classification; Aerial biomass; Fractioning.. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1560 |
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| Turnhout, Esther; Forest and Nature Conservation Policy Group, Wageningen University, The Netherlands; esther.turnhout@wur.nl; Boonman-Berson, Susan; Forest and Nature Conservation Policy Group, Wageningen University, The Netherlands; susan.boonman-berson@wur.nl. |
| Since the Convention on Biological Diversity in 1992, biodiversity has become an important topic for scientific research. Much of this research is focused on measuring and mapping the current state of biodiversity, in terms of which species are present at which places and in which abundance, and making extrapolations and future projections, that is, determining the trends. Biodiversity databases are crucial components of these activities because they store information about biodiversity and make it digitally available. Useful biodiversity databases require data that are reliable, standardized, and fit for up-scaling. This paper uses material from the EBONE-project (European Biodiversity Observation Network) to illustrate how biodiversity databases are... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biodiversity; Classification; Databases; Scaling practices; Standards; Statistics; Volunteer recorders. |
| Ano: 2011 |
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| Schader, Christian; Research Institute of Organic Agriculture (FiBL); christian.schader@fibl.org; Grenz, Jan; Bern University of Applied Sciences; jan.grenz@bfh.ch; Meier, Matthias S; Research Institute of Organic Agriculture (FiBL); matthias.meier@fibl.org; Stolze, Matthias; Research Institute of Organic Agriculture (FiBL); matthias.stolze@fibl.org. |
| With sustainability within food systems becoming an increasingly important issue, several approaches that claim to assess the sustainability of farms, farming systems, and supply chains have been developed. Looking more closely at these sustainability impact assessment approaches, we discerned considerable differences between them in terms of scope, the level of assessment, and the precision of indicators used for impact assessment. Our aim was to classify and analyze a range of available sustainability impact assessment approaches with respect to scope and precision. From a total of 35 sustainability assessment approaches, we selected 6 for a detailed comparison. From our analysis, we concluded that there are 3 different types of trade-offs in these... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Agriculture; Classification; Life cycle assessment; SAFA guidelines; Sustainability assessment; Typology. |
| Ano: 2014 |
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| Aboukarima,Abdulwahed; El-Marazky,Mohamed; Elsoury,Hussien; Zayed,Moamen; Minyawi,Mamdouh. |
| ABSTRACT One of the new crop varieties that have been adopted for high yield is the Egyptian faba bean. However, poor-quality faba bean has reduced economic value. Quality evaluation is thus important and can be performed using computational intelligence. We developed a robust method based on morphological features and artificial neural network for quality grading and classification of Egyptian faba-bean seeds, covering five varieties: Giza3, Giza461, Misr1, Nobarya1, and Sakha1. Fifteen seed morphological features were then calculated, and artificial neural networks classified faba beans into different varieties. The results indicated an overall classification accuracy of 77.5% was achieved in training phase and it was 100% when testing dataset was used.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Faba bean; Quality; Classification; Artificial neural network; Features. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600791 |
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| Messias,José A. T.; Melo,Evandro de C.; Lacerda Filho,Adílio F. de; Braga,José L.; Cecon,Paulo R.. |
| The present study aimed at evaluating the use of Artificial Neural Network to correlate the values resulting from chemical analyses of samples of coffee with the values of their sensory analyses. The coffee samples used were from the Coffea arabica L., cultivars Acaiá do Cerrado, Topázio, Acaiá 474-19 and Bourbon, collected in the southern region of the state of Minas Gerais. The chemical analyses were carried out for reducing and non-reducing sugars. The quality of the beverage was evaluated by sensory analysis. The Artificial Neural Network method used values from chemical analyses as input variables and values from sensory analysis as output values. The multiple linear regression of sensory analysis values, according to the values from chemical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee quality; Chemical analysis; Classification; Computer systems. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000200015 |
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| D'Elía,Guillermo; Pardiñas,Ulyses F. J; Teta,Pablo; Patton,James L. |
| A new tribe of sigmodontine rodents is formally defined and diagnosed. The tribe contains the extant genera Abrothrix (including Chroeomys), Chelemys, Geoxus, Pearsonomys, and Notiomys, a group of taxa distributed in the central and southern Andes and lowlands both east and west of the cordillera. The new tribe presents a unique combination of characters including nasals and premaxilla usually projected anterior to the incisors, moderately trumpeted; zygomatic plate with upper free border reduced or obsolete; and third upper molar reduced and sub-cylindrical in out-line with an internal ring-like enamel fossette. Molecular phylogenetic analyses indicate that Abrothrix is sister to a clade containing the remaining genera of the new tribe. |
| Tipo: Journal article |
Palavras-chave: Abrothrix; Chelemys; Chroeomys; Geoxus; Pearsonomys; Notiomys; South America; Classification. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382007000200007 |
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| Torres,Martha; Barrera,Junior. |
| GCLASS is an algorithm which explores small samples of two distinct biological states for finding small sets of genes, which form a feature vector that is enough to separate these two states. A typical sample is a set of 60 microarrays, 30 for each biological state, with several thousand genes. The technique consists of the following: a spreading model defined in the space of small sets of genes studied and centered in each feature vector considered; the designing of optimal linear classifiers under this spreading model; and ranking the designed classifiers, based on their error and robustness relative to the spreading. The feature vectors used in the best classifiers are considered the best feature vectors. Due to the great number of potential feature... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gene expression; Classification; Parallel processing. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400034 |
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| CORREIA, R. C.; OLIVEIRA, C. A. V.; SILVA, C. N. da; FRAGA, A. F.. |
| Esta pesquisa teve como objetivo diagnosticar e tipificar os sistemas de produção praticados pelos pequenos produtores do município de Cordeiros-BA, a partir de solicitação da Companhia de Desenvolvimento e Ação Regional (CAR-BA). Neste município, foi selecionada uma amostra de 100 produtores e um questionário contendo 670 variáveis foi aplicado. Posteriormente, foram geradas 86 variáveis complexas, a partir das variáveis simples (dados coletados). As informações foram analisadas através de técnicas estatísticas multivariadas. Os resultados mostraram a existência de sete tipos distintos de pequenos produtores, dos doze encontrados no Nordeste: Tipos 1, 2, 4, 5, 7, 8 e 9 com as seguintes importâncias (%): 3; 10; 5; 23; 6; 46 e 7, respectivamente. Os mesmos... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Tipificação; Perfil socioeconômico; Propriedade agrícola; Estrutura; Brasil; Bahia; Cordeiros; Small farmers; Socioeconomic profile; Structure.; Diagnostico; Pequeno Produtor; Sistema de Produção.; Farms; Classification; Farming systems; Brazil.. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133923 |
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| FARIA, C. M. B. de; CABRAL, F. J. G.; FERRAZ, M. L.; CHOUDHURY, E. N.; MARTINS, C. E.. |
| Atraves da analise de solo, foi realizada uma avaliacao da fertilidade do solo em uma area de 1.100 ha do perimetro irrigado do Projeto de Irrigacao de Bebedouro, apos 13 anos de exploracao. Os dados dos elementos obtidos, foram comparados com os do solo virgem e classificados em niveis baixo, medio e alto. Quando comparado o solo em estudo com o solo virgem, houve aumento nos teores de potassio, fosforo, calcio, magnesio e da condutividade eletrica, e um decrescimo do teor de sodio, e o valor do pH praticamente nao se alterou. No que se refere a classificacao dos niveis, constatou-se que a maior parte da area do Projeto apresentou niveis altos de potassio, niveis medios de fosforo, calcio, magnesio e pH e niveis baixos de aluminio e da Capacidade de Troca... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Classificação; Brasil; Pernambuco; Petrolina; Fertility; Project.; Solo; Fertilidade; Irrigação.; Soil; Classification; Irrigation.. |
| Ano: 1982 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131997 |
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| Registros recuperados: 115 | |
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