Results 111 to 120 of about 208,607 (232)

Frontera Sur Colombiana, una región a ser ocupada

open access: yesEstudios en Seguridad y Defensa, 2008
La frontera sur colombiana está estratégicamente ubicada en una de las regiones más investigadas de todo el mundo, la Amazonía. Esta región de Colombia es completamente distinta de la andina y costeña, pues posee la más pequeña densidad demográfica del país y una cantidad insuficiente de municipios para preservar la soberanía nacional.
openaire   +3 more sources

Catalogue of the ectoparasitic insects of the bats of Argentina [PDF]

open access: yes, 2000
Taxonomy and distribution of the ectoparasitic insects of bats from Argentina, are reviewed. Seventeen species of Diptera (six of Nycteribiidae and eleven of Streblidae), six species of Siphonaptera (four ofIschnopsyllidae, one of Pulicidae, and one ...
Autino, Analia G., Claps, Guillermo L.
core   +1 more source

3D Variations in Viscosity Reconcile the Strength of the Lower Mantle Inferred From Glacial Isostatic Adjustment and Mantle Convection

open access: yesGeophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract A widely accepted global model of glacial isostatic adjustment (GIA) is based on ICE‐6G ice loading and 1D‐viscosity model VM5a, a viscosity profile which remains at odds with mantle convection constraints such as from geoid modeling. We explore 3D‐viscosity variations in models of GIA and show that a model with lateral viscosity variations ...
A. Bellas‐Manley   +3 more
wiley   +1 more source

Testing the E_p,i - L_p,iso - T_0.45 correlation on a BeppoSAX and Swift sample of gamma-ray bursts

open access: yes, 2008
Using a sample of 14 BeppoSAX and 74 Swift GRBs with measured redshift we tested the correlation between the intrinsic peak energy of the time-integrated spectrum, E_p,i, the isotropic-equivalent peak luminosity, L_p,iso, and the duration of the most ...
A. Moretti   +142 more
core   +1 more source

ECUADOR, PLAN COLOMBIAY SEGURIDAD: UNA IMPREDECIBLE VECINDAD [PDF]

open access: yes, 2002
Durante mucho tiempo, Colombia y Ecuador compartieron su mutua frontera con una confianza tal que no necesitó de reglas ni acuerdos institucionales, salvo en los temas de rigor previstos por las relaciones entre estados.
García Gallegos, Bertha
core  

To What Extent Does ESG Performance Influence Board Engagement in Acquisition Activity?

open access: yesCorporate Social Responsibility and Environmental Management, Volume 33, Issue 3, Page 3158-3174, May 2026.
ABSTRACT This study examines the relationship between boards and corporate acquisition activity. Specifically, we posit that boards with directors who have been politicians positively influence the propensity to pursue acquisitions and that ESG performance (divided into environmental, social, and governance scores) moderates this relationship.
Leticia Pérez‐Calero   +4 more
wiley   +1 more source

Gestión migratoria en la frontera sur de México

open access: yesEstudios: filosofía, historia, letras, 2015
En este texto se reflexiona sobre el doble papel del Estado mexicano en materia de gestion migratoria de la frontera sur: por un lado, una politica de contencion que propicia condiciones de gran vulnerabilidad para los migrantes indocumentados y, por el otro, una voluntad anunciada de proteger sus derechos humanos.
openaire   +1 more source

The scaling of seed‐dispersal specialization in interaction networks across levels of organization

open access: yesEcography, Volume 2026, Issue 5, May 2026.
Natural ecosystems are characterized by a specialization pattern where few species are common while many others are rare. In ecological networks involving biotic interactions, specialization operates as a continuum at individual, species, and community levels. Theory predicts that ecological and evolutionary factors can primarily explain specialization.
Gabriel M. Moulatlet   +3 more
wiley   +1 more source

Patrimonialización de la Danza del Tigre en el poblado ch’ol de Puxcatán, México

open access: yesCulturales, 2019
El artículo analiza los elementos históricos, socioculturales, ambientales y políticos que caracterizan a la Danza del Tigre (DT) y su proceso de patrimonialización desde 1980 en Puxcatán, Tabasco, México.
Leydi Magaly López López   +2 more
doaj   +1 more source

Disentangling conservation asymmetries through socio‐economic transboundary factors across the Alto Paraná Atlantic Forest of South America

open access: yesPeople and Nature, Volume 8, Issue 5, Page 1328-1348, May 2026.
Abstract Ecoregions are often defined based on homogeneous biophysical and ecological conditions and are optimal spatial units for designing conservation strategies. However, transboundary ecoregions such as the Alto Paraná Atlantic Forest (APAF) experience asymmetrical conservation outcomes, understood here as cross‐border differences, resulting from ...
Lía Montti   +16 more
wiley   +1 more source

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