Results 51 to 60 of about 516,395 (305)

Notas para volver a ver la frontera

open access: yesChihuahua Hoy, 2016
La noción de frontera ha variado a lo largo de la historia y en el caso del norte de México pasa desde referirse de manera amplia a un territorio intermedio, borroso y elástico en la época colonial, hasta fines del siglo xix cuando se le define como una
Pedro Vidal Siller Vázquez
doaj   +1 more source

An upscattering spectral formation model for the prompt emission of Gamma-Ray Bursts

open access: yes, 2012
We propose a model for the spectral formation of Gamma Ray Burst (GRB) prompt emission, where the phenomenological Band's function is usually applied to describe the GRB prompt emission.
Amati, Lorenzo   +3 more
core   +1 more source

Imaginarios sobre la frontera norte en el discurso de la prensa nacional argentina

open access: yes, 2020
Este articulo estudia los imaginarios asociados a la frontera norte de la Argentina en el discurso de su prensa nacional durante la transicion presidencial entre el kirchnerismo, de ideologia nacional-popular, y el macrismo, conservador-neoliberal (2015 ...
Jose Navarro-Conticello, A. Benedetti
semanticscholar   +1 more source

Benzene, an Unexpected Binding Unit in Anion–π Recognition: The Critical Role of CH/π Interactions

open access: yesSci, 2022
We report high-level ab initio calculations (CCSD(T)(full)/CBS//SCS-RI-MP2(full)/aug-cc-pwCVTZ) that demonstrate the importance of cooperativity effects when Anion–π and CH/π interactions are simultaneously established with benzene as the π-system.
David Quiñonero, Antonio Frontera
doaj   +1 more source

Average power density spectrum of long GRBs detected with BeppoSAX/GRBM and with Fermi/GBM

open access: yes, 2013
From past experiments the average power density spectrum (PDS) of GRBs with unknown redshift was found to be modelled from 0.01 to 1 Hz with a power-law, f^(-alpha), with alpha broadly consistent with 5/3.
Amati, L.   +3 more
core   +1 more source

Una mirada heterogénea del espacio fronterizo: el caso de la frontera tarapaqueña (Chile)

open access: yesRevista CIDOB d'Afers Internacionals, 2019
Las zonas fronterizas han estado y estan presentes en el discurso publico por la creciente preocupacion en relacion con los espacios de trasiego humano y de mercancias que suponen.
Romina Ramos Rodríguez   +1 more
semanticscholar   +1 more source

Clinical Trials in Cardiac Arrest and Subarachnoid Hemorrhage: Lessons from the Past and Ideas for the Future

open access: yesStroke Research and Treatment, 2013
Introduction. Elevated intracranial pressure that occurs at the time of cerebral aneurysm rupture can lead to inadequate cerebral blood flow, which may mimic the brain injury cascade that occurs after cardiac arrest.
Jennifer A. Frontera
doaj   +1 more source

Las lógicas de gobierno de lo fronterizo en el espacio Schengen: la frontera como estriación

open access: yesRevista CIDOB d'Afers Internacionals, 2019
Este artículo propone una reflexión sobre la frontera considerando su operatividad como espacio de gobierno. Esta lectura implica trascender el ingrediente territorial de frontera –y su sentido de afirmación soberana– y atender a su funcionalidad ...
David San Martín Segura
doaj   +1 more source

X‐Ray Photoelectron Spectroscopy as Useful Technique for the Quantification of Halogen and Chalcogen Bonding Interactions

open access: yesChemistryEurope, EarlyView.
Unprecedented application of X‐ray photoelectron spectroscopy (XPS) for quantifying halogen and chalcogen bond strengths. This pioneering work provides the first benchmark study and establishes strong correlations between XPS shifts (ΔBE) and interaction energies (ΔE), revealing XPS as an experimental measure for noncovalent bond quantification in ...
Sergi Burguera, Antonio Frontera
wiley   +1 more source

México ¿una frontera vertical? Políticas de control del tránsito migratorio irregular y sus resultados, 2007-2016

open access: yesLiminar: Estudios Sociales y Humanísticos, 2018
The objective of this paper is to analyze the extent to which Mexican migration policy has made Mexico an extensive border for irregular migrants in transit to the United States, the so-called "vertical border." To this end, it examines Mexican control ...
Eduardo Torre Cantalapiedra   +1 more
semanticscholar   +2 more sources

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