Results 1 to 10 of about 965,119 (219)
Revista Colombiana de Estadística, 1983 Universidad Nacional de Colombia Universidad Nacional de Colombia
doaj +12 more sources
Revista Colombiana de Química, 2009 Incluye índice y nota ...
Universidad Nacional de Colombia Universidad Nacional de Colombia Universidad Nacional de Colombia
doaj +10 more sources
Universidad Nacional de Colombia [PDF]
Comparative Studies in Society and History, 1959 For the first time in its history, the National University of Colombia has a Department of Sociology. Organized temporarily within the Faculty of Economic Sciences, the new department is directed by Orlando Fals Borda, a Colombian sociologist trained in the United States, author of widely known studies of Latin American peasant societies, and since ...
openaire +2 more sources
Revista Colombiana de Química, 2010 Universidad Nacional de Colombia Universidad Nacional de Colombia
doaj +26 more sources
Optimization of the diffraction efficiency in photorefractive crystals [PDF]
, 2017 The aim of this work is to study and to optimize the diffraction efficiency in sillenite BTO crystals. A theoretical analysis, where the effects of coupling beams are significant,is carried on. In addition, non-mobile transmission gratings are considered.
Arias Hernández, Néstor Alonso +3 more
core +2 more sources
Electronic structure of the double perovskite Ba2Er(Nb,Sb)O 6 [PDF]
, 2014 In this work, we present a detailed study of the structural and the electronic structure of the double perovskite Ba2Er(Nb,Sb)O 6. All calculations were performed with the Full-Potential Linear Augmented Plane Wave method (FP-LAPW) based on the Density ...
Deluque Toro, Crispulo Enrique +3 more
core +3 more sources
Preyssler Heteropolyacids in the Self-Etherification of 5-Hydroxymethylfurfural to 5,5′-[Oxybis(methylene)]bis-2-furfural Under Mild Reaction Conditions [PDF]
, 2017 The synthesis of 5,5′-[oxybis(methylene)]bis-2-furfural (OBMF) from 5-hydroxymethylfurfural (5-HMF) was studied using bulk and alumina-supported Preyssler heteropolyacids (HPAs). The formation of OBMF was related to the amount of Brønsted acid sites, and
Afonso, Carlos A. M. +6 more
core +1 more source
Modelo de valoración financiera para un producto innovador: aplicación a un producto de la universidad nacional de Colombia sede Medellín [PDF]
, 2013 Este trabajo incorpora los resultados de una investigación asociada con la gestión de la innovación y con métodos de valoración financiera, e incluye una propuesta de modelo para valorar financieramente productos innovadores existentes en la Universidad ...
Botero Botero, Sergio +1 more
core +3 more sources
Increased moral condemnation of accidental harm in institutionalized adolescents [PDF]
, 2018 Social deprivation, as faced by children in institutional rearing, involves socio-cognitive deficits that may persist into adolescence. In particular, two relevant domains which prove sensitive to pre-adult neurodevelopment are theory of mind (ToM) and ...
Baez, Sandra +5 more
core +1 more source
Coherent exciton-vibrational dynamics and energy transfer in conjugated organics [PDF]
, 2018 Coherence, signifying concurrent electron-vibrational dynamics in complex natural and man-made systems, is currently a subject of intense study. Understanding this phenomenon is important when designing carrier transport in optoelectronic materials. Here,
Alfonso Hernandez, Laura +9 more
core +1 more source