Results 11 to 20 of about 24,952 (150)
Tracing the metabolic rift in Colombia's greengrocer: an environmental history of the Anaime Valley [PDF]
, 2020 This paper stems from research to reconstruct an environmental history of agriculture in the Anaime Canyon Valley and better understand the environmental consequences of having transformed the area into “Colombia's greengrocer”.
Doughman, Richard
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A mission to test the Pioneer anomaly: estimating the main systematic effects [PDF]
, 2007 We estimate the main systematic effects relevant in a mission to test and characterize the Pioneer anomaly through the flight formation concept, by launching probing spheres from a mother spacecraft and tracking their motion via laser ranging.Comment: 9 ...
Bertolami O. +5 more
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Revista U.D.C.A Actualidad & Divulgación Científica, 2014 Los páramos son ecosistemas andinos que han experimentado, a lo largo de diferentes períodos históricos, profundas transformaciones, las que han alterado o cambiado su dinámica natural, a partir del desarrollo de procesos relacionados con la explotación ...
Aida Elena Baca-G
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Acta Biológica Colombiana, 2015 The frailejón (Espeletia spp.) is the emblematic shrub of the paramo. This is an important ecosystem because they are sources of water and organic matter, and are inhabited by a high number of endemic biological species. Considering the importance of the
Pilar Ximena LIZARAZO-MEDINA +1 more
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Cosmological implications of Bumblebee vector models
, 2015 The Bumblebee Model of spontaneous Lorentz symmetry breaking is explored in a cosmological context, considering a single non-zero time component for the vector field.
Capelo, Diogo, Páramos, Jorge
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Climate Change in the High Andes:implications and adaptation strategies for small-scale farmers [PDF]
, 2010 : Global climate change represents a major threat to sustainable farming in the Andes. Farmers have used local ecological knowledge and intricate production systems to cope, adapt and reorganize to meet climate uncertainty and risk, which have always ...
Dangles, O. +7 more
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Visible and Dark Matter Profiles in a Non-Minimally Coupled Model
, 2017 A previous work found that a nonminimally coupled theory of gravity can, under appropriate conditions, give rise to an additional contribution to the field equations interpreted as dark matter [1]: in particular, the density of this dark matter component
Páramos, Jorge, Silva, Aníbal
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Entorno Geografico, 2019 En este artículo se presentan un inventario de 653 lagos que suman 1.495 hectáreas (Ha.) ubicados en las tierras altas de la cordillera Central colombiana entre los departamentos de Tolima y Valle del Cauca.
Guillermo Andrés Ospina
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Accelerated expansion from a non-minimal gravitational coupling to matter
, 2010 It is shown that a non-minimal coupling between the scalar curvature and the matter Lagrangian density may account for the accelerated expansion of the Universe and provide, through mimicking, for a viable unification of dark energy and dark matter.
Bertolami, O., Frazao, P., Páramos, J.
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Inflation with a massive vector field nonminimally coupled to gravity
, 2016 We study the possibility that inflation is driven by a massive vector field with SO(3) global symmetry nonminimally coupled to gravity. From an E^3-invariant Robertson-Walker metric we propose an Ansatz for the vector field, allowing us to study the ...
Bertolami, O., Bessa, V., Páramos, J.
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