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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Molina , Kevin; Ortega , Daniel; Martinez , Manuel; Pinto-Hernández , William; +1 Authors

    International audience; In this work the mechanical behavior of the blade of a wind turbine is studied, analyzing the impact of the design of the blade on the amount of energy generated, and its structural response as a function of the stresses induced by the air flow. In order to study the relationship between flow forces, deformations and stresses induced in the structure, a Fluid Structure Interaction (FSI) model was used. The blade structure is designed using blade element momentum theory (BEM), taking constant properties related to the wind (speed, density, Reynolds), and the selection of a profile; En este trabajo se estudia el comportamiento mecánico del álabe de una turbina eólica, analizando el impacto del diseño del álabe en la cantidad de energía generada, y su respuesta estructural en función de las fuerzas inducidas por el flujo de aire. Para estudiar la relación entre las fuerzas del flujo, los desplazamientos y esfuerzos provocados en la estructura, utilizamos un modelo de interacción fluido estructura (FSI). La estructura del álabe se diseña por medio de la teoría del momento y el elemento de pala (BEM), tomando como puntos de partida cons tantes referentes al viento (velocidad, densidad, Reynolds) y la selección de un perfil recomendado por la NACA, RISO, DU o NREL. Posteriormente, se efectúa el mismo procedimiento para un perfil diseñado mediante teorías de desempeño. Teniendo los resultad os de estos dos tipos de álabes, se realiza una comparación de los esfuerzos y desplazamientos debidos a las variaciones entre el perfil diseñado y el perfil seleccionado, estudiando cómo esta variación afecta la energía generada de la turbina y su integridad estructural.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Bersalli, German;
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    Part of book or chapter of book . 2016
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Trillos Gonz??lez, Carlos Ignacio;

    En el presente trabajo de investigaci??n se presentan nociones b??sicas que facilitan no solo entender la energ??a el??ctrica como una mercanc??a de propiedades uniformes, sino tambi??n dimensionar la infraestructura e insumos requeridos para conformar una red que permita prestar el servicio de energ??a el??ctrica en forma satisfactoria y sostenible, as?? como la justificaci??n del papel que desempe??an los diferentes actores que participan en el proceso -- A continuaci??n una exposici??n de conceptos pertinentes sobre costos y precios, competencia y monopolio seguida por las opciones metodol??gicas empleadas para fijar la remuneraci??n de las empresas que asumen el riesgo de inversi??n en equipos y la operaci??n y mantenimiento de los mismos y de paso el precio unitario del producto que entregan -- El regulador debe perseguir un equilibrio entre los intereses de las partes afectadas considerando que el esquema de tarifas acogido acarrea consecuencias pol??ticas, tecnol??gicas, econ??micas, financieras y sociales que no siempre son f??cilmente aceptadas -- Posteriormente se pretende resumir la extensa regulaci??n aplicada en Colombia y que est?? contenida principalmente en resoluciones de la Comisi??n de Regulaci??n de Energ??a y Gas (CREG) -- Por ??ltimo se revisan indicadores financieros de empresas del sector el??ctrico colombiano comparados con los de otros sectores as?? como una comparaci??n de tarifas entre diversas regiones de Colombia y entre Colombia y otros pa??ses

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repositorio Instituc...arrow_drop_down
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  • Authors: Ávila García, Yenny Grace;

    La concentración de biomasa es un parámetro fundamental en procesos de tratamiento biológico. Para efectos de supervisión y control de estos procesos industriales se requiere la determinación de los valores actuales de las variables controladas en línea. Existen un gran número de técnicas de estimación, algunas de éstas, basadas en balances de masa simples que permiten la estimación de biomasa, o su correspondiente concentración, a partir de los valores medidos en línea. Los observadores de estado son herramientas que permiten estimar las variables o estados de un sistema a partir de otras variables del proceso susceptibles de ser medidas en línea. El proyecto comprende el diseño de dos tipos diferentes de observador desarrollados para la estimación de biomasa en un bioreactor. ; Biomass concentration is a fundamental parameter in biological treatment processes. For purposes of supervision and control of these industrial processes requires the determination of the current values of the variables controlled in line. There are many estimation techniques, some of them based on simple mass balances that allow the estimation of biomass, or its corresponding concentration, from the values measured in line. State observers are tools that allow estimating the variables or states of a system from other process variables that can be measured online. The project involves the design of two different types of observer developed for biomass estimation in a bioreactor. ; Ingeniero (a) Electrónico ; Pregrado

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  • Authors: Vega Peña, Juan Sebastian;

    La legislación colombiana relacionada con el cambio climático es muy reciente y aún existen muchas inconsistencias en la aplicación de los beneficios relacionados con ella. Este trabajo de grado busca hacer una investigación de la ley 1715 de 2014, con el propósito de proponer una prueba piloto de curso académico para la fundación FUNcener. ; Colombian legislation related to climate change is very recent and there are still many inconsistencies for the application of the benefits related to it. This work of degree seeks to make an investigation of the law 1715 of 2014, with the purpose of proposing a pilot test of academic course for the FUNcener foundation. ; Administrador (a) de Empresas ; Pregrado

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Ibarra Ballesteros, Julián; Rueda-Ordóñez, Yesid,; Gelvez Arocha, Omar;

    The objective of this work was the design, modelling and sizing of a furnace for combustion of sugar cane leaves, with the purpose of obtaining energy in the form of heat from this residual biomass. From the physical-chemical characteristics of the biomass, a combustion analysis was carried out from the 15.72 MJ / kg of energy produced in the chemical reaction. For this, the equilibrium composition of the mixture and its respectiveadiabatic flame temperature were calculated. Then, the one-dimensional modelling of heat transfer was carried out, in which the thermodynamic properties of the combustion gases, the emissivity and the coefficients of heat transfer by internal and external forced convection were calculated. From this, the average temperature of the combustion gases and the heat losses through the walls of the enclosure were determined. An adiabaticflame temperature close to 772 °C was found and is dependent on the nature of the fuel and the excess of air set to 50%. Also, a low average temperature requires higher volume fireplaces due to the increase in residence time. Therefore, burners with low fuel consumption require greater insulation, since heat losses can be greater than 30%, considered significant for this process. Finally, the sizing of a burner for the combustionof biomass that requires the transfer of heat to a 100 kW steam generator is presented. El objetivo principal de este trabajo fue el diseño, modelado y dimensionamiento de un horno para combustión de hojas de caña de azúcar, con el propósito de obtener energía en forma de calor a partir de esta biomasa residual. Por lo tanto, a partir de las características físico-químicas de labiomasa, se realizó un análisis de la combustión a partir de los 15.72 MJ/kg de energía producidos en la reacción química. Para ello, se calculó la composición de equilibrio de la mezcla y su respectiva temperatura de llama adiabática. Entonces, se realizó el modelamiento unidimensionalde transferencia de calor, en el que se calcularon las propiedades termodinámicas de los gases de combustión, la emisividad y los coeficientes de transferencia de calor por convección forzada interna y natural externa. A partir de esto, se determinaron la temperatura promedio de los gasesde combustión y las pérdidas de calor a través de las paredes del recinto. Se encontró una temperatura de llama adiabática cercana a los 772°C y es dependiente de la naturaleza del combustible y el exceso de aire que se estipuló en 50%. También, una temperatura promedio baja requiere de hogares de mayor volumen debido al aumento del tiempo de residencia. Por consiguiente, quemadores de bajo consumo de combustible requieren un mayor aislamiento, pues las pérdidas de calor pueden ser mayores que 30%, consideradas significativas para este proceso. Finalmente, se presenta el dimensionamiento de una hornilla para la combustión de biomasa que requiere transferir calor a un generador de vapor de 100 kW.

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    Authors: Cavazos Arroyo, Judith; Sánchez Lezama, Ana Paola;

    This research compared, through a multigroup analysis, green consumption among young adult consumers in Mexico and Spain. Thus, the effect of their connection to nature, environmental citizenship, activism and environmental social identity on green consumption was analyzed. A quantitative, explanatory, and cross-sectional methodology was developed, which involved the application of an instrument to 447 Mexican and 120 Spanish young adults. The primary results related to green consumption did not suggest different environmental behavior patterns between the samples. When combined, it was found that environmental social identity and environmental citizenship did not always translate into green consumption. However, young adult consumers who were more connected to nature were more likely to consume eco-friendly products. La investigación comparó, a través de un análisis multigrupo, el consumo verde entre consumidores adultos jóvenes en México y España. Así, se analizó el efecto de su conexión con la naturaleza, ciudadanía ambiental, activismo e identidad social sobre el consumo verde. Se desarrolló una metodología cuantitativa, explicativa y transversal e involucró la aplicación de un instrumento a 447 adultos jóvenes mexicanos y 120 españoles. Los resultados primarios relacionados con el consumo verde no sugirieron patrones de comportamiento ambiental diferentes entre las muestras. Cuando se combinaron, se encontró que la identidad social ambiental y la ciudadanía ambiental no siempre se traducían en consumo verde. Sin embargo, los consumidores adultos jóvenes que estaban más conectados con la naturaleza tenían más probabilidades de consumir productos amigables con el ambiente.

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  • Authors: Guerrero Puello, Gabriela Del Mar;

    El presente trabajo aborda el aumento sostenido de las obras de infraestructura en el país y la vacancia de empresas que ofrecen en Colombia la instalación de mantas y mallas orgánicas contra la erosión. Somos una empresa pionera en ofrecer este tipo de servicio en el país en aras a combatir la desertificación, cuidado del suelo y medio ambiente contribuyendo al desarrollo sostenible del país. Ante el avance del sector de la construcción y la actual vacancia del mercado colombiano, nace Nim Tech S.A.S. una empresa comercializadora de mantas y mallas orgánicas que ofrece su instalación, a los fines de combatir la desertificación en Colombia. ; The following document addresses the increase in infrastructure in the country and the lack of business that offer in Colombia the installation and distribution of organic blankets and netting used for erosion control. We are the pioneers in offering these services in the country to fight against desertification, ground care and the environment contributing to sustainable development of the country. Due to the advances in the construction sector and the vacancy in the Colombian market, Nim Tech S.A.S is brought to life as a trading company that s offers the installation of organic blankets and netting, to fight desertification in Colombia. ; Ingeniero (a) Industrial ; Pregrado

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    Authors: Torres Navas, Anuar Fernando; Ramírez Guzmán, Samuel;

    La razón de esta investigación es plantear una alternativa viable, que apoyada en estudios previos, permita identificar los factores que causan la muerte de las empresas y proponer la gestión de riesgo como medida de tratamiento para lograr la perdurabilidad empresarial. Mediante un recorrido sistemático por diferentes estudios y fuentes bibliográficas se identificarán posibles factores causantes de la “muerte de las empresas”. Esta actividad nos conducirá a determinar una lista de “factores” generadores de mortalidad empresarial, los cuales una vez identificados y clasificados serán analizados bajo la perspectiva de la “gestión de riesgos empresarial” con el fin de proponer esta última como medida de tratamiento que contribuya a la perdurabilidad empresarial. El resultado final del proyecto será la propuesta de una herramienta metodológica que contribuya a minimizar el “riesgo de mortalidad empresarial”, tratando los factores que la generan con la herramienta propuesta como resultado de esta investigación. The reason for this research is to pose a viable alternative that based on previous studies, help identify the factors that cause the death of businesses and propose risk management as a measure of treatment to ensure the sustainability of business. Through a systematic pattern of different studies and literature will identify potential factors causing the "death of business" this activity will lead us to identify a list of "factors" corporate mortality generators, which once identified will be analyzed and classified under the prospect of "risk management business" with a view to proposing the latter as a measure of treatment that contributes to the sustainability business. The end result of the project will be the proposal of a methodological tool that will help minimize the risk of mortality business, "addressing the factors that generate it using the proposal as a result of this investigation.

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    https://dx.doi.org/10.48713/10...
    Master thesis . 2009
    License: CC BY NC SA
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      https://dx.doi.org/10.48713/10...
      Master thesis . 2009
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Kolb, Mélanie;

    This study explores how to use techniques of prospective analysis in order to incorporate dynamic factors that put into risk the persistence of biodiversity into systematic conservation planning. Land use and cover change (LUCC) and climate change (CC) represent the main impacts and future threats to biodiversity and thus were the subject of analyses that provided information on prioritization for conservation actions. Since LUCC, CC and biodiversity loss, as well as the related socio-economic structures take place on a regional scale, this work is based on a large watershed in southern Mexico, the Grijalva-Usumacinta Basin. This basin is not only one of the most important areas for biological diversity, but is also renowned for its cultural complexity and hydrological importance and the multiple environmental and social problems that put biodiversity in peril. The main finding is that deforestation and forest degradation are the main LUCC processes and their high rates and strong future trends make it difficult to get to the point of forest transition in the near future, when deforestation and regeneration are balanced. Nevertheless, the scenario analysis shows that it is possible to influence LUCC trajectories in a substantial way in order to halt negative effects over biodiversity in the next decade. CC represents an additional threat to biodiversity difficult to evaluate, especially if the multiple synergistic effects between CC and LUCC are considered that could lead to much higher impacts. Anyway, the analysis showed that even until 2030 CC could have impacts on bioclimatic variables and species composition that could further hamper conservation efforts in the study area. Criteria for a proactive prioritization of sites for conservation are proposed based on scenarios of LUCC and CC. These criteria are used to identify “hot spots” (high probability of LUCC and severe CC impacts) and “refuges” (high probability of permanence and minor CC impacts). This joint analysis of CCUS and CC shows that there are differences between the conservation and the probable scenario; the effort needed to conserve the biodiversity contained in the priority sites in the conservation scenario is considerable less. The spatial pattern of hot spots and refuges of change is very similar across scenarios, despite the differences in absolute areas compromised by each. Este estudio explora cómo aplicar técnicas de análisis prospectivos para incorporar factores dinámicos que ponen en riesgo la persistencia de biodiversidad en la planeación sistemática de la conservación (PSC). El cambio de cobertura y uso del suelo (CCUS) y el cambio climático (CC) representan los impactos y amenazas futuras más importantes para la biodiversidad, por lo que fueron escogidos como sujetos de análisis que proveen información para la priorización para acciones de conservación. Como el CCUS, el CC, la pérdida de biodiversidad, así como las estructuras socio-económicas relacionadas, ocurren a una escala regional, este trabajo está basado en una cuenca grande en el sur de México. La cuenca Grijalva-Usumacinta no sólo es una de las áreas más biodiversas en el mundo, también es reconocida por su complejidad cultural y su importancia hidrológica. A la vez se han documentado diversos problemas ambientales y sociales que ponen en peligro la persistencia de la biodiversidad. El resultado principal es que la deforestación y la degradación forestal son los procesos dominantes de CCUS y sus altas tasas y fuertes tendencias hacia el futuro vuelven difícil de llegar al punto de la transición forestal, en el cual la deforestación y la regeneración son balanceadas. Sin embargo, el análisis de escenarios muestra que es posible influenciar las trayectorias de CCUS de manera sustancial para detener los efectos adversos en la biodiversidad en la próxima década. El CC representa una amenaza adicional para la biodiversidad difícil de evaluar, especialmente si se consideran los múltiples efectos sinérgicos entre el CC y el CCUS que podrían hacer que el impacto sea mucho mayor. Aun así, el análisis mostró que hasta el 2030 el CC podría tener impactos en las variables bioclimáticas y la composición de especies que podrían dificultar más los esfuerzos de conservación en el área de estudio. Se proponen criterios para una priorización proactiva de la conservación son propuestos basados en escenarios de CCUS y CC. Estos criterios son usados para identificar focos rojos (alta probabilidad de CCUS e impactos de CC severos) y refugios (alta probabilidad de permanencia natural e impactos de CC menores). Este análisis conjunto de CCUS y CC muestra que hay diferencias entre el escenario de conservación y el escenario probable; el esfuerzo necesario para conservar la biodiversidad dentro de los sitios prioritarios es considerablemente menor. Los patrones espaciales de los focos rojos de cambio y los refugios son muy similares en los dos escenarios, a pesar de la diferencia absoluta de áreas en cada uno. Dans les régions néo-tropicales, l’augmentation des taux de changements d’occupation et d’usages des sols et une forte déforestation durant la deuxième moitié du 20e siècle ont engendré une forte dégradation de l’environnement et une forte perte de biodiversité. Cette étude analyse les empreintes spatiales et les processus des changements d’occupation et d’usages des sols et de la déforestation pour le bassin versant du Grijalva-Usumacinta, l’un des plus importants du sud Mexique en matière hydrologique et de biodiversité, pour être confrontée aux discussions sur les changements forestiers émergents. Des cartes d’occupation et d’usages des sols de 1992, 2002 et 2007, dérivées d’images satellitaires et de photographies aériennes sont utilisées pour tester l’hypothèse d’un changement de trajectoires d’évolution à l’échelle régionale. Les probabilités et taux de changements ont été calculés pour les deux périodes 1992-2002 et 2002-2007, et les processus de changements dominants ont été identifiés. Les changements d’occupation et d’usages des sols sont complexes et ne peuvent s’expliquer par une histoire prédominante et linéaire de la déforestation. Deux des principaux résultats concernent (1) un taux anormalement élevé de dégradation des forêts primaires, équivalent à 1,7 fois la surface déforestée ; (2) les processus de déforestation se produisent principalement dans les forêts secondaires. Les activités agricoles, encouragées par les politiques publiques, sont les principaux moteurs de ces changements, parmi lesquelles le pâturage a le plus d'impact sur la déforestation. Les probabilités et taux de déforestation et de changement d’occupation et d’usages de sols ont stagné alors que la reforestation naturelle a augmenté. Bien que ces tendances sont essentielles pour le commencement de la transition forestière, la déforestation et la dégradation l'emportent bien sur la repousse de la végétation.

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    Authors: Molina , Kevin; Ortega , Daniel; Martinez , Manuel; Pinto-Hernández , William; +1 Authors

    International audience; In this work the mechanical behavior of the blade of a wind turbine is studied, analyzing the impact of the design of the blade on the amount of energy generated, and its structural response as a function of the stresses induced by the air flow. In order to study the relationship between flow forces, deformations and stresses induced in the structure, a Fluid Structure Interaction (FSI) model was used. The blade structure is designed using blade element momentum theory (BEM), taking constant properties related to the wind (speed, density, Reynolds), and the selection of a profile; En este trabajo se estudia el comportamiento mecánico del álabe de una turbina eólica, analizando el impacto del diseño del álabe en la cantidad de energía generada, y su respuesta estructural en función de las fuerzas inducidas por el flujo de aire. Para estudiar la relación entre las fuerzas del flujo, los desplazamientos y esfuerzos provocados en la estructura, utilizamos un modelo de interacción fluido estructura (FSI). La estructura del álabe se diseña por medio de la teoría del momento y el elemento de pala (BEM), tomando como puntos de partida cons tantes referentes al viento (velocidad, densidad, Reynolds) y la selección de un perfil recomendado por la NACA, RISO, DU o NREL. Posteriormente, se efectúa el mismo procedimiento para un perfil diseñado mediante teorías de desempeño. Teniendo los resultad os de estos dos tipos de álabes, se realiza una comparación de los esfuerzos y desplazamientos debidos a las variaciones entre el perfil diseñado y el perfil seleccionado, estudiando cómo esta variación afecta la energía generada de la turbina y su integridad estructural.

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    Authors: Bersalli, German;
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    Part of book or chapter of book . 2016
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    Authors: Trillos Gonz??lez, Carlos Ignacio;

    En el presente trabajo de investigaci??n se presentan nociones b??sicas que facilitan no solo entender la energ??a el??ctrica como una mercanc??a de propiedades uniformes, sino tambi??n dimensionar la infraestructura e insumos requeridos para conformar una red que permita prestar el servicio de energ??a el??ctrica en forma satisfactoria y sostenible, as?? como la justificaci??n del papel que desempe??an los diferentes actores que participan en el proceso -- A continuaci??n una exposici??n de conceptos pertinentes sobre costos y precios, competencia y monopolio seguida por las opciones metodol??gicas empleadas para fijar la remuneraci??n de las empresas que asumen el riesgo de inversi??n en equipos y la operaci??n y mantenimiento de los mismos y de paso el precio unitario del producto que entregan -- El regulador debe perseguir un equilibrio entre los intereses de las partes afectadas considerando que el esquema de tarifas acogido acarrea consecuencias pol??ticas, tecnol??gicas, econ??micas, financieras y sociales que no siempre son f??cilmente aceptadas -- Posteriormente se pretende resumir la extensa regulaci??n aplicada en Colombia y que est?? contenida principalmente en resoluciones de la Comisi??n de Regulaci??n de Energ??a y Gas (CREG) -- Por ??ltimo se revisan indicadores financieros de empresas del sector el??ctrico colombiano comparados con los de otros sectores as?? como una comparaci??n de tarifas entre diversas regiones de Colombia y entre Colombia y otros pa??ses

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  • Authors: Ávila García, Yenny Grace;

    La concentración de biomasa es un parámetro fundamental en procesos de tratamiento biológico. Para efectos de supervisión y control de estos procesos industriales se requiere la determinación de los valores actuales de las variables controladas en línea. Existen un gran número de técnicas de estimación, algunas de éstas, basadas en balances de masa simples que permiten la estimación de biomasa, o su correspondiente concentración, a partir de los valores medidos en línea. Los observadores de estado son herramientas que permiten estimar las variables o estados de un sistema a partir de otras variables del proceso susceptibles de ser medidas en línea. El proyecto comprende el diseño de dos tipos diferentes de observador desarrollados para la estimación de biomasa en un bioreactor. ; Biomass concentration is a fundamental parameter in biological treatment processes. For purposes of supervision and control of these industrial processes requires the determination of the current values of the variables controlled in line. There are many estimation techniques, some of them based on simple mass balances that allow the estimation of biomass, or its corresponding concentration, from the values measured in line. State observers are tools that allow estimating the variables or states of a system from other process variables that can be measured online. The project involves the design of two different types of observer developed for biomass estimation in a bioreactor. ; Ingeniero (a) Electrónico ; Pregrado

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  • Authors: Vega Peña, Juan Sebastian;

    La legislación colombiana relacionada con el cambio climático es muy reciente y aún existen muchas inconsistencias en la aplicación de los beneficios relacionados con ella. Este trabajo de grado busca hacer una investigación de la ley 1715 de 2014, con el propósito de proponer una prueba piloto de curso académico para la fundación FUNcener. ; Colombian legislation related to climate change is very recent and there are still many inconsistencies for the application of the benefits related to it. This work of degree seeks to make an investigation of the law 1715 of 2014, with the purpose of proposing a pilot test of academic course for the FUNcener foundation. ; Administrador (a) de Empresas ; Pregrado

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    Authors: Ibarra Ballesteros, Julián; Rueda-Ordóñez, Yesid,; Gelvez Arocha, Omar;

    The objective of this work was the design, modelling and sizing of a furnace for combustion of sugar cane leaves, with the purpose of obtaining energy in the form of heat from this residual biomass. From the physical-chemical characteristics of the biomass, a combustion analysis was carried out from the 15.72 MJ / kg of energy produced in the chemical reaction. For this, the equilibrium composition of the mixture and its respectiveadiabatic flame temperature were calculated. Then, the one-dimensional modelling of heat transfer was carried out, in which the thermodynamic properties of the combustion gases, the emissivity and the coefficients of heat transfer by internal and external forced convection were calculated. From this, the average temperature of the combustion gases and the heat losses through the walls of the enclosure were determined. An adiabaticflame temperature close to 772 °C was found and is dependent on the nature of the fuel and the excess of air set to 50%. Also, a low average temperature requires higher volume fireplaces due to the increase in residence time. Therefore, burners with low fuel consumption require greater insulation, since heat losses can be greater than 30%, considered significant for this process. Finally, the sizing of a burner for the combustionof biomass that requires the transfer of heat to a 100 kW steam generator is presented. El objetivo principal de este trabajo fue el diseño, modelado y dimensionamiento de un horno para combustión de hojas de caña de azúcar, con el propósito de obtener energía en forma de calor a partir de esta biomasa residual. Por lo tanto, a partir de las características físico-químicas de labiomasa, se realizó un análisis de la combustión a partir de los 15.72 MJ/kg de energía producidos en la reacción química. Para ello, se calculó la composición de equilibrio de la mezcla y su respectiva temperatura de llama adiabática. Entonces, se realizó el modelamiento unidimensionalde transferencia de calor, en el que se calcularon las propiedades termodinámicas de los gases de combustión, la emisividad y los coeficientes de transferencia de calor por convección forzada interna y natural externa. A partir de esto, se determinaron la temperatura promedio de los gasesde combustión y las pérdidas de calor a través de las paredes del recinto. Se encontró una temperatura de llama adiabática cercana a los 772°C y es dependiente de la naturaleza del combustible y el exceso de aire que se estipuló en 50%. También, una temperatura promedio baja requiere de hogares de mayor volumen debido al aumento del tiempo de residencia. Por consiguiente, quemadores de bajo consumo de combustible requieren un mayor aislamiento, pues las pérdidas de calor pueden ser mayores que 30%, consideradas significativas para este proceso. Finalmente, se presenta el dimensionamiento de una hornilla para la combustión de biomasa que requiere transferir calor a un generador de vapor de 100 kW.

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    Authors: Cavazos Arroyo, Judith; Sánchez Lezama, Ana Paola;

    This research compared, through a multigroup analysis, green consumption among young adult consumers in Mexico and Spain. Thus, the effect of their connection to nature, environmental citizenship, activism and environmental social identity on green consumption was analyzed. A quantitative, explanatory, and cross-sectional methodology was developed, which involved the application of an instrument to 447 Mexican and 120 Spanish young adults. The primary results related to green consumption did not suggest different environmental behavior patterns between the samples. When combined, it was found that environmental social identity and environmental citizenship did not always translate into green consumption. However, young adult consumers who were more connected to nature were more likely to consume eco-friendly products. La investigación comparó, a través de un análisis multigrupo, el consumo verde entre consumidores adultos jóvenes en México y España. Así, se analizó el efecto de su conexión con la naturaleza, ciudadanía ambiental, activismo e identidad social sobre el consumo verde. Se desarrolló una metodología cuantitativa, explicativa y transversal e involucró la aplicación de un instrumento a 447 adultos jóvenes mexicanos y 120 españoles. Los resultados primarios relacionados con el consumo verde no sugirieron patrones de comportamiento ambiental diferentes entre las muestras. Cuando se combinaron, se encontró que la identidad social ambiental y la ciudadanía ambiental no siempre se traducían en consumo verde. Sin embargo, los consumidores adultos jóvenes que estaban más conectados con la naturaleza tenían más probabilidades de consumir productos amigables con el ambiente.

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  • Authors: Guerrero Puello, Gabriela Del Mar;

    El presente trabajo aborda el aumento sostenido de las obras de infraestructura en el país y la vacancia de empresas que ofrecen en Colombia la instalación de mantas y mallas orgánicas contra la erosión. Somos una empresa pionera en ofrecer este tipo de servicio en el país en aras a combatir la desertificación, cuidado del suelo y medio ambiente contribuyendo al desarrollo sostenible del país. Ante el avance del sector de la construcción y la actual vacancia del mercado colombiano, nace Nim Tech S.A.S. una empresa comercializadora de mantas y mallas orgánicas que ofrece su instalación, a los fines de combatir la desertificación en Colombia. ; The following document addresses the increase in infrastructure in the country and the lack of business that offer in Colombia the installation and distribution of organic blankets and netting used for erosion control. We are the pioneers in offering these services in the country to fight against desertification, ground care and the environment contributing to sustainable development of the country. Due to the advances in the construction sector and the vacancy in the Colombian market, Nim Tech S.A.S is brought to life as a trading company that s offers the installation of organic blankets and netting, to fight desertification in Colombia. ; Ingeniero (a) Industrial ; Pregrado

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    Authors: Torres Navas, Anuar Fernando; Ramírez Guzmán, Samuel;

    La razón de esta investigación es plantear una alternativa viable, que apoyada en estudios previos, permita identificar los factores que causan la muerte de las empresas y proponer la gestión de riesgo como medida de tratamiento para lograr la perdurabilidad empresarial. Mediante un recorrido sistemático por diferentes estudios y fuentes bibliográficas se identificarán posibles factores causantes de la “muerte de las empresas”. Esta actividad nos conducirá a determinar una lista de “factores” generadores de mortalidad empresarial, los cuales una vez identificados y clasificados serán analizados bajo la perspectiva de la “gestión de riesgos empresarial” con el fin de proponer esta última como medida de tratamiento que contribuya a la perdurabilidad empresarial. El resultado final del proyecto será la propuesta de una herramienta metodológica que contribuya a minimizar el “riesgo de mortalidad empresarial”, tratando los factores que la generan con la herramienta propuesta como resultado de esta investigación. The reason for this research is to pose a viable alternative that based on previous studies, help identify the factors that cause the death of businesses and propose risk management as a measure of treatment to ensure the sustainability of business. Through a systematic pattern of different studies and literature will identify potential factors causing the "death of business" this activity will lead us to identify a list of "factors" corporate mortality generators, which once identified will be analyzed and classified under the prospect of "risk management business" with a view to proposing the latter as a measure of treatment that contributes to the sustainability business. The end result of the project will be the proposal of a methodological tool that will help minimize the risk of mortality business, "addressing the factors that generate it using the proposal as a result of this investigation.

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    https://dx.doi.org/10.48713/10...
    Master thesis . 2009
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    Authors: Kolb, Mélanie;

    This study explores how to use techniques of prospective analysis in order to incorporate dynamic factors that put into risk the persistence of biodiversity into systematic conservation planning. Land use and cover change (LUCC) and climate change (CC) represent the main impacts and future threats to biodiversity and thus were the subject of analyses that provided information on prioritization for conservation actions. Since LUCC, CC and biodiversity loss, as well as the related socio-economic structures take place on a regional scale, this work is based on a large watershed in southern Mexico, the Grijalva-Usumacinta Basin. This basin is not only one of the most important areas for biological diversity, but is also renowned for its cultural complexity and hydrological importance and the multiple environmental and social problems that put biodiversity in peril. The main finding is that deforestation and forest degradation are the main LUCC processes and their high rates and strong future trends make it difficult to get to the point of forest transition in the near future, when deforestation and regeneration are balanced. Nevertheless, the scenario analysis shows that it is possible to influence LUCC trajectories in a substantial way in order to halt negative effects over biodiversity in the next decade. CC represents an additional threat to biodiversity difficult to evaluate, especially if the multiple synergistic effects between CC and LUCC are considered that could lead to much higher impacts. Anyway, the analysis showed that even until 2030 CC could have impacts on bioclimatic variables and species composition that could further hamper conservation efforts in the study area. Criteria for a proactive prioritization of sites for conservation are proposed based on scenarios of LUCC and CC. These criteria are used to identify “hot spots” (high probability of LUCC and severe CC impacts) and “refuges” (high probability of permanence and minor CC impacts). This joint analysis of CCUS and CC shows that there are differences between the conservation and the probable scenario; the effort needed to conserve the biodiversity contained in the priority sites in the conservation scenario is considerable less. The spatial pattern of hot spots and refuges of change is very similar across scenarios, despite the differences in absolute areas compromised by each. Este estudio explora cómo aplicar técnicas de análisis prospectivos para incorporar factores dinámicos que ponen en riesgo la persistencia de biodiversidad en la planeación sistemática de la conservación (PSC). El cambio de cobertura y uso del suelo (CCUS) y el cambio climático (CC) representan los impactos y amenazas futuras más importantes para la biodiversidad, por lo que fueron escogidos como sujetos de análisis que proveen información para la priorización para acciones de conservación. Como el CCUS, el CC, la pérdida de biodiversidad, así como las estructuras socio-económicas relacionadas, ocurren a una escala regional, este trabajo está basado en una cuenca grande en el sur de México. La cuenca Grijalva-Usumacinta no sólo es una de las áreas más biodiversas en el mundo, también es reconocida por su complejidad cultural y su importancia hidrológica. A la vez se han documentado diversos problemas ambientales y sociales que ponen en peligro la persistencia de la biodiversidad. El resultado principal es que la deforestación y la degradación forestal son los procesos dominantes de CCUS y sus altas tasas y fuertes tendencias hacia el futuro vuelven difícil de llegar al punto de la transición forestal, en el cual la deforestación y la regeneración son balanceadas. Sin embargo, el análisis de escenarios muestra que es posible influenciar las trayectorias de CCUS de manera sustancial para detener los efectos adversos en la biodiversidad en la próxima década. El CC representa una amenaza adicional para la biodiversidad difícil de evaluar, especialmente si se consideran los múltiples efectos sinérgicos entre el CC y el CCUS que podrían hacer que el impacto sea mucho mayor. Aun así, el análisis mostró que hasta el 2030 el CC podría tener impactos en las variables bioclimáticas y la composición de especies que podrían dificultar más los esfuerzos de conservación en el área de estudio. Se proponen criterios para una priorización proactiva de la conservación son propuestos basados en escenarios de CCUS y CC. Estos criterios son usados para identificar focos rojos (alta probabilidad de CCUS e impactos de CC severos) y refugios (alta probabilidad de permanencia natural e impactos de CC menores). Este análisis conjunto de CCUS y CC muestra que hay diferencias entre el escenario de conservación y el escenario probable; el esfuerzo necesario para conservar la biodiversidad dentro de los sitios prioritarios es considerablemente menor. Los patrones espaciales de los focos rojos de cambio y los refugios son muy similares en los dos escenarios, a pesar de la diferencia absoluta de áreas en cada uno. Dans les régions néo-tropicales, l’augmentation des taux de changements d’occupation et d’usages des sols et une forte déforestation durant la deuxième moitié du 20e siècle ont engendré une forte dégradation de l’environnement et une forte perte de biodiversité. Cette étude analyse les empreintes spatiales et les processus des changements d’occupation et d’usages des sols et de la déforestation pour le bassin versant du Grijalva-Usumacinta, l’un des plus importants du sud Mexique en matière hydrologique et de biodiversité, pour être confrontée aux discussions sur les changements forestiers émergents. Des cartes d’occupation et d’usages des sols de 1992, 2002 et 2007, dérivées d’images satellitaires et de photographies aériennes sont utilisées pour tester l’hypothèse d’un changement de trajectoires d’évolution à l’échelle régionale. Les probabilités et taux de changements ont été calculés pour les deux périodes 1992-2002 et 2002-2007, et les processus de changements dominants ont été identifiés. Les changements d’occupation et d’usages des sols sont complexes et ne peuvent s’expliquer par une histoire prédominante et linéaire de la déforestation. Deux des principaux résultats concernent (1) un taux anormalement élevé de dégradation des forêts primaires, équivalent à 1,7 fois la surface déforestée ; (2) les processus de déforestation se produisent principalement dans les forêts secondaires. Les activités agricoles, encouragées par les politiques publiques, sont les principaux moteurs de ces changements, parmi lesquelles le pâturage a le plus d'impact sur la déforestation. Les probabilités et taux de déforestation et de changement d’occupation et d’usages de sols ont stagné alors que la reforestation naturelle a augmenté. Bien que ces tendances sont essentielles pour le commencement de la transition forestière, la déforestation et la dégradation l'emportent bien sur la repousse de la végétation.

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