Analysis of the use of Renewable Energies in Colombia and the Potential Application of Thermoelectric Devices for Energy Recovery

This study investigates the current situation of electricity generation from non-conventional renewable energy sources in Colombia (NCRES). In general, it was shown that Colombia has potential in renewable sources such as solar, wind, and biomass. However, barriers such as lack of human capital, policies focused on conventional technologies and high investment costs have impeded their growth. Although the development of these sources has been encouraged through Law 1715 of 2014, more policies and developments are needed to promote this type of NCRES. The use of thermoelectric devices (TED) can become a potential NCRES alternative, while the political and technological conditions improve in Colombia. Around the world, TEDs have allowed the recovery of waste heat in a variety of industrial applications and the automotive sector. They are allowing in the latter, not only the generation of electric power, but also the reduction in engine emissions. Besides, its characteristics have allowed it to be used for the generation of electric power, both in developed and developing countries. In this document, an example presentation is developed that demonstrates the applications of the TED in the cases above to demonstrate the potential that the TED can have in almost any place that has a heat source. Keywords: Electricity Generation, Energy Policy, Energy Recovery, Non-conventional Renewable Energy, Thermoelectric Device JEL Classifications: L78, L90, O31, Q20 DOI: https://doi.org/10.32479/ijeep.803

Diseño y construcción de un prototipo automatizado para la torrefacción de café

En este artículo se presentan los resultados obtenidos del proyecto "Diseño y construcción de un prototipo para el control de temperatura y humedad en el proceso de torrefacción del café" que tuvo por objetivo mejorar el proceso empírico de tostado de las pequeñas y medianas empresas tostadoras de la región, adaptando e innovando en tecnología aplicada y optimizar procesos productivos. Con la implementación del sistema de control en la torrefactora construida, se obtuvo un mejoramiento en el proceso pues se logró mayor control de las variables que intervienen en éste, con lo que se garantizó y estandarizó la calidad del producto

A seasonal diary of phytoplankton in the North Atlantic

In recent years new biological and physical controls have been suggested to drive phytoplankton bloom dynamics in the North Atlantic. A better understanding of the mechanisms driving primary production has potentially important implications for the understanding of the biological carbon pump, as it has for prediction of the system in climate change scenarios. However, the scientific discussion regarding this topic has generally failed to integrate the different drivers into a coherent picture, often rendering the proposed mechanisms exclusive to each other. We feel that the suggested mechanisms are not mutually exclusive, but rather complementary. Thus, moving beyond the “single mechanism” point of view, here we present an integrated conceptual model of the physical and biological controls on phytoplankton dynamics in the North Atlantic. Further we believe that the acclimation of physiological rates can play an important role in mediating phytoplankton dynamics. Thus, this view emphasizes the occurrence of multiple controls and relates their variations in impact to climate change

Model averaging, optimal inference, and habit formation

Postulating that the brain performs approximate Bayesian inference generates principled and empirically testable models of neuronal function-the subject of much current interest in neuroscience and related disciplines. Current formulations address inference and learning under some assumed and particular model. In reality, organisms are often faced with an additional challenge-that of determining which model or models of their environment are the best for guiding behavior. Bayesian model averaging-which says that an agent should weight the predictions of different models according to their evidence-provides a principled way to solve this problem. Importantly, because model evidence is determined by both the accuracy and complexity of the model, optimal inference requires that these be traded off against one another. This means an agent's behavior should show an equivalent balance. We hypothesize that Bayesian model averaging plays an important role in cognition, given that it is both optimal and realizable within a plausible neuronal architecture. We outline model averaging and how it might be implemented, and then explore a number of implications for brain and behavior. In particular, we propose that model averaging can explain a number of apparently suboptimal phenomena within the framework of approximate (bounded) Bayesian inference, focusing particularly upon the relationship between goal-directed and habitual behavior

Constraints, Resourcefulness, and Resilience in the Immigrant Latinx Community: Alternative Health Promoting Strategies for Diabetes Self-Management

Despite major health reforms, American bureaucracy continues to deliberately exclude undocumented and recent immigrants from receiving coverage in the U.S healthcare system. Without accessible, affordable insurance, many Latinx immigrants with chronic illnesses, like diabetes, experience difficulties in securing adequate care to manage their condition. A great deal of health disparities research already highlights the disadvantages of this demographic’s struggle to consistently obtain the recommended Western biomedical treatments for diabetes management, considering bureaucratic and financial hurdles. However, not enough attention has been given to how this Latinx demographic circumvents health constraints, in absence of these resources. Largely lacking is a more accurate portrayal of their lived experiences, one that reflects not only their struggle, but their resilience as chronically ill individuals who experience several dimensions of social inequality. How do people who face so much resistance employ resourcefulness, creativity, and cultural practices to holistically best manage their chronic condition?Psychology, Department ofHonors Colleg

Archivos en la era digital : problema solución de los recursos electrónicos

Son muy numerosos los artículos publicados acerca de lo que suponen, y pueden suponer, los recursos digitales para el mejor funcionamiento de las llamadas instituciones de memoria. Pero la mayoría de ellos se refieren a los recursos digitales como algo que se consume y se pone a disposición de los usuarios, rara vez como algo que se produce y se pone también a su disposición. A partir de las funciones propias de cualquier tipo de archivo, se propone crear recursos digitales acordes con una normativa dada (estructuras de metadatos, OAIâPMH, web semántica, etc.) con la finalidad de incrementar la capacidad de recuperación de la información y la visibilidad de ésta, tanto para especialistas como para cualquier tipo de usuario. Europa debe marcarse como objetivo prioritario desarrollar nuevos sistemas de recuperación de la información y nuevos productos basados en estándares y protocolos que le proporcionen una más competitiva posición en la sociedad de la información. | Many articles have been written about what digital resources represent âor could representâ for improving the performance of âmemory institutionsâ. But the majority of them refer to digital resources as things to be consumed and made available to users, but rarely as something to be produced and later made available to them. Starting with the functions of archives, the article proposes the creation of digital resources according to standards (metadata structures, OAIâPMH, semantic Web, etc.) in order to enhance resource discovery and information visibility, for specialists as well as for other types of users. Europe must give top priority to the development of new information retrieval systems and new products based on emerging standards and protocols in order for European countries to achieve a more competitive standing within the information society

Aplicando Tolerancia a Fallas para la Implementación de Compensación de Saturación en Accionadores

Resumen: En esta contribución se presenta un método para la implementación práctica de sistemas de control con compensación de saturación en los actuadores. La técnica se aplica en sistemas lineales, tomando como base un mecanismo de diagnóstico y detección de fallas. Para ello, la saturación en los actuadores es considerada como una falla en el sistema de control, la cual es detectada y aislada mediante un banco de filtros de diagnóstico de fallas, cuyos residuos son utilizados para efectuar la compensación de la saturación, proporcionando un esquema de control tolerante a esta falla particular. Así, el método exhibe ciertas propiedades de robustez frente a cambios en el funcionamiento de los actuadores. Para la síntesis de los filtros de detección de fallas se propone un método derivado de las técnicas de control óptimo robusto en H2/Hâ, basado en desigualdades lineales matriciales. Para verificar las propiedades de la teÄnica propuesta se presenta un ejemplo numeÅico. Palabras clave: Control tolerante a fallas, compensación anti-windup, filtros de detección defallas, desigualdades lineales matriciale