Ciencias básicas
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Recent Submissions
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A nonperturbative form of the spectral action principle in noncommutative geometry
(1998-07)Using the formalism of superconnections, we show the existence of a bosonic action functional for the standard K-cycle in noncommutative geometry, giving rise, through the spectral action principle, only to the Einstein ... -
Faà di Bruno Hopf algebras
(2022-11)This is a short review on the Faà di Bruno formulas, implementing composition of real-analytic functions, and a Hopf algebra associated to such formulas. This structure allows, among several other things, a short proof of ... -
On summability of distributions and spectral geometry
(1998-01)Modulo the moment asymptotic expansion, the Cesàro and parametric behaviours of distributions at infinity are equivalent. On the strength of this result, we construct the asymptotic analysis for spectral densities arising ... -
From geometric quantization to Moyal quantization
(1995-06)We show how the Moyal product of phase-space functions, and the Weyl correspondence between symbols and operator kernels, may be obtained directly using the procedures of geometric quantization, applied to the symplectic ... -
Forest in a changing world
(2016)Forest ecosystems have been used for human populations over millennia. Even today, forests provide a large amount of resources and environmental services for modern human populations, but disturbance caused by human ... -
Geochemistry and microbiology of tropical serpentine soils in the Santa Elena Ophiolite, a landscape-biogeographical approach
(2022-09-27)The Santa Elena Ophiolite is a well-studied ultramafic system in Costa Rica mainly comprised of peridotites. Here, tropical climatic conditions promote active laterite formation processes, but the biogeochemistry of the ... -
From Cobalt Laterites to Baseball, Goldschmidt 2018 in Boston
(2018-09-28)Este blog describe las actividades académicas de los integrantes del Geomicro Group de la University of Manchester, Reino Unido, liderado por el Prof. Jonathan Lloyd. Esta publicación en particular, fue escrita por Agustín ... -
Environmental Chemistry Group and Environmental Mineralogy Group Hold First Joint Meeting
(2018-08-01)Este blog describe las actividades académicas de los integrantes del Geomicro Group de la University of Manchester, Reino Unido, liderado por el Prof. Jonathan Lloyd. Esta publicación en particular, fue escrita por Agustín ... -
Visiting the ALS synchrotron in Berkeley, California
(2018-04-17)Este blog describe las actividades académicas de los integrantes del Geomicro Group de la University of Manchester, Reino Unido, liderado por el Prof. Jonathan Lloyd. Esta publicación en particular, fue escrita por Agustín ... -
Goldschmidt Conference: Geomicro in Paris
(2017-11-08)Este blog describe las actividades académicas de los integrantes del Geomicro Group de la University of Manchester, Reino Unido, liderado por el Prof. Jonathan Lloyd. Esta publicación en particular, fue escrita por Agustín ... -
Field trip to Costa Rica: The search for cobalt!
(2016-06-27)Este blog describe las actividades académicas de los integrantes del Geomicro Group de la University of Manchester, Reino Unido, liderado por el Prof. Jonathan Lloyd. Esta publicación en particular, fue escrita por Agustín ... -
El primer Mega-Niño del siglo XX: su impacto desde una escala global (1925-1926)
(2022)Durante el bienio de 1925-1926, el planeta Tierra experimentó el primer Mega Niño del siglo XX. Este consistió en un fenómeno ENOS (El Niño-Oscilación del Sur) “muy fuerte”1 , el cual, tanto reforzó eventos extremos en ... -
Curculionid beetles in aborted flower buds and immature fruits of Ceiba pentandra (Bombacaceae)
(2008)We determined the incidence of curculionid beetles of the genus Lonchophorus on aborted and not aborted flower buds and developing fruits of the tree Ceiba pentandra in southeastern Costa Rica. Beetle larvae were found in ... -
Estudio de Coherencia y Transporte Cuánticos en las Dinámicas Energéticas duranta la Captación de Energía Lumínica en Sistemas Fotosintéticos
(2022-11)The photosynthesis is one of the most studied biological processes through history. Its capacity to fix carbon into nutritional molecules is the base of all food chains. Its efficient exploitation of the solar energy ... -
Allometry and stilt root structure of the Neotropical palm Euterpe precatoria (Arecaceae) across sites and successional stages
(2010)The lack of secondary meristems shapes allometric relationships of the palms, infl uencing species segregation according to their capacity to adjust form and function to spatial and temporal changes in environmental ... -
Depredación de la paloma piquirroja (Patagioenas flavirostris) por el gavilán bicolor (Accipiter bicolor): observaciones sobre el modo de consumo y vigilancia
(2014)El gavilán bicolor depreda principalmente aves de tamaños variables. En esta comunicación reportamos la depredación de la paloma piquirroja por parte de un gavilán bicolor cerca del parque Nacional Volcán Poás, Costa Rica ... -
Uso de la cianobacteria Nostoc muscorum como biofertilizante y sus efectos tanto en el desarrollo del frijol (Phaseolus vulgaris) como en las características del suelo en condiciones de invernadero
(2022-11-22)Nostoc muscorum es una cianobacteria filamentosa que presenta estructuras especializadas llamadas heterocistes, que le permite convertir el nitrógeno molecular atmosférico a formas disponibles como amonio. En entornos ... -
Central America [in State of the Climate in 2021]
(2021)Regional Climates is one chapter from the State of the Climate in 2021 annual report. Compiled by NOAA’s National Centers for Environmental Information, State of the Climate in 2021 is based on contributions from scientists ... -
Presence of microplastics in six bivalve species (Mollusca, Bivalvia) commercially exploited at the Pacific coast of Costa Rica, Central America
(2022-08)Microplastic pollution represents a serious threat to coastal marine systems. We evaluated the presence of microplastics (MPs) in 168 specimens of six commercially exploited bivalve species in the Golfo de Nicoya, Costa ... -
Scaling of stem diameter and height allometry in 14 neotropical palm species of different forest strata Gerardo
(2019)Tropical palms reach tree-like heights without a vascular cambium through sustained cell expansion and lignification of primary tissues, but only a fraction of palms have been explored in their allometric relationships. ...
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