Results 31 to 40 of about 262,089 (225)
Coulomb repulsion versus Hubbard repulsion in a disordered chain
, 2000 We study the difference between on site Hubbard and long range Coulomb repulsions for two interacting particles in a disordered chain. While Hubbard repulsion can only yield weak critical chaos with intermediate spectral statistics, Coulomb repulsion can
Pichard, Jean-Louis, Selva, Franck
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ML Estimation and Detection of Multiple Frequencies Through Periodogram Estimate Refinement [PDF]
, 2017 This letter presents a method to detect and estimate multiple frequencies based on the maximum-likelihood principle. The method addresses the three main difficulties in this kind of computation, which are the detection of the number of frequencies, the ...
Selva, Jesus
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Remote Sensing in Ecology and Conservation, EarlyView.Monitoring forest recovery from disturbances at scale requires tracking tree dynamics, yet traditional ground‐based approaches are resource‐intensive. We present a pipeline to parameterize integral projection models (IPMs) using LiDAR data and hyperspectral‐based species maps to assess post‐fire recovery across large, forested areas at the Caribou ...
Jessica McLean +4 more
wiley +1 more source
Agroindustrial Science, 2021 Las infusiones son bebidas elaboradas con plantas nativas o cultivadas. El objetivo de la investigación fue determinar el contenido macro (Ca, Na, K y Mg) y microelementos (Fe, Mn, Zn, Cu, Cr, Pb y Cd) mediante el uso de espectroscopía de emisión óptica ...
Elizabeth S. Ordoñez +2 more
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A novel circumscription and classification for Neurolaeneae (Asteraceae)
TAXON, EarlyView.Abstract Neurolaeneae (Asteraceae) have a complicated taxonomic history. The tribe was described in 1927, but subsequently disregarded in 1977, and later reinstated as a tribe following a large‐scale phylogenetic analysis of Asteraceae in 2002. To date, this tribe has remained poorly studied and it has never been the subject of a comprehensive ...
Vinicius R. Bueno +4 more
wiley +1 more source
The ecology of attraction: Fruit traits and frugivore diversity in neotropical Piper
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Fruit traits can benefit plant reproduction by enhancing seed dispersal by mutualistic frugivores (e.g. seed dispersal syndromes), but identifying the role of specific fruit traits in mediating frugivory is challenging because these traits can serve multiple functions ...
Sharlene E. Santana +3 more
wiley +1 more source
Herbivore and mesocarnivore carcasses trigger divergent short‐term changes in soil properties
Journal of Animal Ecology, EarlyView.Scavengers reshape nutrient cycles in soils under carrion. Compared to herbivore carcasses, smaller but longer‐lasting carnivore remains boost nutrient levels and microbial activity in dry soils. Abstract Animal corpses act as pulses of organic matter (OM) and serve a key zoogeochemical role by providing localized nutrient inputs to soils and thereby ...
Adrián Colino‐Barea +15 more
wiley +1 more source
Central American Temnocerus Thunberg, 1815 (Coleoptera: Rhynchitidae) [PDF]
, 2010 Twenty eight species of Temnocerus Thunberg, 1815 are recognized from Central America (Mexico to Panama) with eight previously described species and 20 new species as follows: T. abdominalis (Voss), T. chiapensis n. sp., T.
Hamilton, R. W.
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Journal of Agricultural Economics, EarlyView.ABSTRACT Coffee producers deal with uncertainty due to high volatility in coffee prices. To navigate these challenges, producers must balance the tradeoff between higher yield and better quality utilising heterogeneous technologies, such as intensive production methods and environmental management practices.
Orlando Rodríguez +2 more
wiley +1 more source
Presencia de metales pesados en cultivo de cacao (Theobroma cacao L.) orgánico
Acta Agronómica, 2012 La presencia de metales pesados en el cultivo de cacao (Theobroma cacao L.) es actualmente un grave problema para agricultores y cooperativas de las regiones Huánuco y Ucayali, Perú. En el presente trabajo se evaluaron los contenidos de cadmio y plomo en
Hugo Alfredo Huamaní-Yupanqui +4 more
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