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Assessing functional diversity: the influence of the number of the functional traits ArchiMer
Legras, Gaëlle; Loiseau, Nicolas; Gaertner, Jean-claude; Poggiale, J-c.; Gaertner-mazouni, N..
The impact of the variation of the number of functional traits on functional diversity assessment is still poorly known. Although the covariation between these two parameters may be desirable in some situations (e.g. if adding functional traits provides relevant new functional information), it may also result from mathematical artefacts and lead to misinterpretation of the results obtained. Here, we have tested the behaviour of a set of nine indices widely used for assessing the three main components of functional diversity (i.e. functional richness, evenness and divergence), according to the variation in the number of functional traits. We found that the number of functional traits may strongly impact the values of most of the indices considered, whatever...
Tipo: Text Palavras-chave: Functional traits; Dissimilarity metric; Functional diversity; Index sensitivity; Trend analysis.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00503/61438/65561.pdf
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Automatização de análise de dados remotos para monitoramento da dinâmica da expansão agrícola. Repositório Alice
SILVA, J. P. da; ROMANI, L. A. S.; GONÇALVES, R. R. do V.; ASSAD, M. L. R. C. L.; ZULLO JÚNIOR, J..
Este artigo apresenta um framework que integra diversas ferramentas computacionais para fazer a análise da dinâmica de ocupação da terra ao longo do tempo.
Tipo: Anais e Proceedings de eventos Palavras-chave: Teste de Mann-Kendall; Análise de tendência; Ferramentas computacionais; Cana-de-açúcar; Mann-Kendall Test; Trend analysis; Computer tools; Sensoriamento remoto; Remote sensing; Sugarcane.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1027324
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Experimental Study on the Changing Rules of Coal Fire Indictor Gases of the Whole Combustion Phases in Confined Space BABT
Lei,Baiwei; Wu,Bing; Wang,Xuyang.
ABSTRACT When the coal mine fire occurs, it is crucial to judge the fire combustion state by analyzing indicator gases concentration and changing trends of various gas ratios in order to formulate proper rescue measures. It's an effective methodology to estimate the changes of combustion state in coal mine fire accurately by the trends analysis of indicator gases and gas ratios independent of the external environment disturbs, such as air leakage and inner gases injection. However, there are few experimental researches about the changing rules of indicator gases and gas ratios at different combustion phases at present. Therefore, this paper has established a small-sized coal combustion experimental platform in confined space, on which the experimental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coal combustion; Indicator gases; Gas ratios; Trend analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000200704
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Exploring the potential of cassava in promoting agricultural growth in Nigeria JARTS
Rahman, Sanzidur; Awerije, Brodrick O..
Cassava is one of the major food crops in Nigeria, with multiple uses from human consumption to industrial applications. This study explores the potential of cassava in Nigerian agriculture based on a review of cassava development policies; performs a trend analysis of the cultivation area, production, productivity, and real price of cassava and other competing crops for the period 1961–2013; identifies the sources of growth in production; and examines the production constraints at the local level based on a survey of 315 farmers/processors and 105 marketers from Delta State. The results revealed that several policies and programmes were implemented to develop the cassava sector with mixed outcomes. Although cassava productivity grew at 1.5% per annum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Economics cassava sector; Constraints on cassava; Nigeria; Sources of growth decomposition; Trend analysis; Nigeria.
Ano: 2016 URL: http://www.jarts.info/index.php/jarts/article/view/2016050350174
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Modelación espacio tiempo del ozono urbano en la Ciudad de México bajo el enfoque Max-stable. Colegio de Postgraduados
Múñiz Merino, Lucila.
En este trabajo se aplicó una metodología basada en el proceso max-stable para analizar la tendencia espacio temporal de datos ambientales. Los niveles máximos de ozono del Valle de México, entre los años 1998 a 2010, se modelaron mediante cuatro modelos max-stable: el de Smith el de Schlather, el Gaussiano Geométrico y el de Brown-Resnik. La estimación de parámetros de los cuatro modelos se hizo mediante máxima verosimilitud compuesta por pares. Posteriormente, se seleccionó el mejor modelo, de acuerdo con el criterio de información de verosimilitud de Takeuchy (TIC). La tendencia espacio temporal resultó estadísticamente significativa al fijar el parámetro de suavizamiento del modelo de Schlather y ajustar una regresión lineal a su rango. Lo anterior...
Palavras-chave: Modelo bivariado max-stable; Criterio de Tackeuchy (TIC); Análisis de tendencia; Verosimilitud compuesta por pares; Dependencia extremal; Bivariate max-stable Model; Tackeuchy's criterion (TIC); Trend analysis; Pairwise-composite likelihood; Extreme dependency; Estadística; Maestría.
Ano: 2013 URL: http://hdl.handle.net/10521/1987
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TRANSLATING LATENT TRENDS IN FOOD CONSUMER BEHAVIOR INTO NEW PRODUCTS AgEcon
Gellynck, Xavier; Kuhne, Bianka; Van Wezemael, Lynn; Verbeke, Wim.
For successful product development it is important to explore the latent changes in consumer behavior prior to the product development process. The identification of a latent trend before the manifestation moment can be achieved by trend analysis. Trend analysis delivers insights that explore the future in order to identify prospective consumers and new product ideas, but also includes a feeling for the currents in market and technology. Hence, the aim is to identify emerging weak signals in consumer behavior that have potential as large revenue opportunities when implemented into new products. Therefore, the objective of our paper is to provide a novel tool for this identification and how the identified trends can be translated into new products. Until...
Tipo: Conference Paper or Presentation Palavras-chave: New Product development; Trend analysis; Novel trend implementation tool; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; M31; O31; O32.
Ano: 2010 URL: http://purl.umn.edu/116422
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Trends in total rainfall, heavy rain events, and number of dry days in San Juan, Puerto Rico, 1955-2009 Ecology and Society
Nieves-Santiango, Alejandro; Graduate School of Public Health and Center for Public Health Preparedness, University of Puerto Rico-Medical Sciences Campus; alejandro.nieves1@upr.edu.
Climate variability is a threat to water resources on a global scale and in tropical regions in particular. Rainfall events and patterns are associated worldwide with natural disasters like mudslides and landslides, meteorological phenomena like hurricanes, risks/hazards including severe storms and flooding, and health effects like vector-borne and waterborne diseases. Therefore, in the context of global change, research on rainfall patterns and their variations presents a challenge to the scientific community. The main objective of this research was to analyze recent trends in precipitation in the San Juan metropolitan area in Puerto Rico and their relationship with regional and global climate variations. The statistical trend analysis of precipitation...
Tipo: Peer-Reviewed article Palavras-chave: Climate variability; Puerto Rico; Rainfall patterns; San Juan; Trend analysis.
Ano: 2014
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