DDABB. Circulación de Conocimiento Especializado
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- PublicaciónAcceso abiertoCrecimiento Económico y Dinámica de Sistemas. Aprendizaje mediante experimentación(Instituto Internacional de Informática y Sistémica, IIIS, 2020-03-29)La teoría clásica del crecimiento económico es un tema ampliamente analizado con un fuerte basamento matemático. Este trabajo plantea, como metodología educativa alternativa, enfocar su estudio mediante dinámica de sistemas, ofreciendo una visión más intuitiva y experimental que permite incorporar de manera gráfica las interrelaciones de feedback presentes en las estructuras que definen esos modelos. Se analizan algunas ideas clásicas de crecimiento económico, como las teorías de Adam Smith y de David Ricardo, plasmadas en sus respectivas obras, “La Riqueza de las Naciones” y “Principios de Economía Política”, construyendo así un laboratorio informático para realizar experimentos con modelos complejos en el campo de la economía. El principal producto es la construcción de un instrumento educativo para realizar experimentos de política económica, basándose en los principios de la dinámica de sistemas, utilizando software apropiado, como Powersim.
- PublicaciónAcceso abiertoCharacterization of biodeteriorating microorganisms in buildings in Bucaramanga, Colombia(2019)The action of the microorganisms upon the integrity of the constructing material is termed Biodeterioration, concrete resistance to the action of the microorganisms is considered an indirect measurement of its durability and could be used as a marker of the integrity of the structure. In Colombia, the studies considering this parameter are rare. The objective of this study was to isolate and characterize the microbial communities present in areas with evident deterioration in the selected buildings. To accomplish this, isolation, culturing and molecular identification of the isolates was performed. Results showed that Cladosporium spp, Aspergillus spp, Mucor spp, Penicillium spp, Penicillium spp, Rhizopus spp, Fusarium spp, Geotrichum spp, and bacterial genera such as Bacillus spp and Amphibacillus spp, coexist within the biofilms sampled. This study is a description and a starting point to deepen the characterization of these communities and to understand the role they perform in the integrity of the building materials considering the climatic and environmental conditions.
- PublicaciónAcceso abiertoComparing the identification of sites with high risk of landslides using isohyets of precipitation vs alterations of rainfall by La Niña in Santander Colombia(2015)Extreme meteorological events associated with climate change are a real issue and have important impact over the economy of infrastructure sector, including highways, hydrocarbon transport by pipelines, mines, etc., because saturation of soils by water can produce landslides and it could produce the fracture of pipelines or other kind of tangible assets. For example, an assessment of historical geotechnical failures in Ecopetrol (Colombian Oil Company) vs. extreme meteorological events shows that during La Niña (extreme rainfall period) geotechnical failures are three times greater. This work shows a method to identify places of risk by extreme meteorological events, mainly La Niña phenomenon, with focus in most probably alteration of rainfall. Our results illustrate the hot spots where there is a high probability of slight excess (120–160% of average rainfall) and high excess (>160%) of average rainfall. The results were intersected in a GIS with pipelines and mass movement risk maps to identify the places of high risk along Santander region.
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