Saltar navegación e ir al contenido principal
Biblioteca digital de Bogotá
Logo BibloRed
Saltar el buscador

Esta ingresando al contenido principal

Colección institucional

Tesis y artículos académicos

En esta colección encontrarás los productos de investigación académica de beneficiarios de COLFUTURO y Fulbright, en diversas disciplinas, como arte, biología, administración e ingeniería.

  • Encuentra en esta colección
    • Otros
    • 1225 Tesis
    • 5 Audios
    • 820 Artículos
  • Creada el:
    • 15 de Julio de 2019
Logo Biblioteca Virtual Banco de la República
Creador Biblioteca Virtual Banco de la República
Imagen de apoyo de Life cycle assessment and carbon footprint for the production of biochar as an alternative of soil remediation = Análisis del ciclo de vida y huella de carbono para la producción de biocarbón como alternativa de remediación de suelos

Life cycle assessment and carbon footprint for the production of biochar as an alternative of soil remediation = Análisis del ciclo de vida y huella de carbono para la producción de biocarbón como alternativa de remediación de suelos

Por: Alfonso Rolando Rodríguez Pinilla | Fecha: 2013

The use of biochar such as a “gentle” in situ soil remediation technique has received attention in recent years. The production and characteristic of biochar are influenced mainly by the operating conditions of conversion process and feedstock composition. Although the commercialization of biochar as a soil amendment is still in its infancy, some companies in the UK have ventured into the production and development of biochar products with very good results in the management of contaminants in soils. The environmental benefits and impacts of biochar produced by fast pyrolysis were modelled and compared with carbon footprint and life cycle assessment (LCA) methodologies. Four different kinds of feedstocks were selected. These were two kinds of straw (barley and wheat) and two kinds of wood chips (pine and beech). Pine wood reported the highest net emission with 4.9 1 t CO2 eqt-1 biochar while wheat straw was the lowest with 1.6 t CO2 eqt-1 biochar. This difference was correlated with the composition of lining in the feedstock. At the same time, the major contribution of GHG emission to the system boundary is for the pyrolysis process with the 99% for all feedstocks others aspects also were evaluated. Nine of fourteen impact categories selected were analysed for the LCA methodology. However, absolute values of this assessment remain difficult to interpret, and for that reason a normalisation with European and global loads step was applied. The biggest demonstrable impact from wheat straw charring is on ecotoxicity for aquatic fresh water. It was found that many factors, specially the selection of the type of feedstock in the production of biochar by fast pyrolysis, affect not only the characteristic of the product but also its environmental impacts in a significant level.
  • Temas:
  • Otros

Compartir este contenido

Life cycle assessment and carbon footprint for the production of biochar as an alternative of soil remediation = Análisis del ciclo de vida y huella de carbono para la producción de biocarbón como alternativa de remediación de suelos

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de Three Stories Toward Creation Thesis Report = Tres Historias para la Creación

Three Stories Toward Creation Thesis Report = Tres Historias para la Creación

Por: Rodrigo Gómez Claros | Fecha: 2002

Desde la fantasía y la magia de la creación indígena hasta la derrota del conquistador como resultado de la ambición y la destrucción, son algunos de los elementos que se combinan para ofrecer un nuevo comienzo a lo que hoy se llama Cultura Latinoamericana. Con el juego de formas, colores y sonido se produce un pieza en la que se busca el regreso a una identidad propia. Principales objetivos: Presentar tres escenarios de la civilización latinoamericana a través del uso de símbolos precolombinos, elementos históricos, el formato de cuento y la animación como medio de crítica política y social en contra de la discriminación cultural en Norte América. Entender el concepto de cultura como un evento cíclico de tesis, antitesis y síntesis. Crear una interpretación personal sobre lo que es la cultura en Latino América. Comentario Técnico: Tres historias para la creación es una producción bi y tridimensional que utiliza los programas de animación Maya y After effects como fuente principal para generar imágenes en continua transformación explorando el uso de máscaras de vectores y cámaras múltiples en el mismo cuadro. También explora el juego con el área de encuadre como un elemento variable que forma parte de la historia. Programas utilizados: Alias Wavefront Maya 3.0 Sensable Technologies Freeform 4.0 Adobe Photoshop 6.0 Adobe After effects 5.0 Final Cut Pro 2.0 Sound Edit 16 2.0 Adobe Ilustrator 10.0 Fractal Painter 6.0
  • Temas:
  • Otros

Compartir este contenido

Three Stories Toward Creation Thesis Report = Tres Historias para la Creación

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de Systemic revitalization. Bogotá, exploring strategies for intensification and revitalization of the consolidated city

Systemic revitalization. Bogotá, exploring strategies for intensification and revitalization of the consolidated city

Por: Carlos Andrés Núñez Dávila | Fecha: 2012

Nowadays, across the world, politic and economic models have been challenged. As part of the global agenda; urban discussions need to reposition towards enriching social and economic debates. In Bogota, Processes of urbanization have been shaped within profound conditions of inequity, rural migration and violence; generating a city socially and spatially segregated. Nevertheless, since last two decades, Bogota has been engaged in a process of transition towards the construction of more equalitarian and sustainable city. In this context, how to set up the agenda for further development strategies in the city? The aim of this thesis is to bring some ideas and questions into the debate about the construction of future models of urban development for Bogota. From the discussions and research presented we can derive some key points to have in account in terms of policies, planning and spatial strategies, and socio-economic dimensions; which can help to frame proposals about how Bogota can explore alternative strategies of urban revitalization.  Starting from acknowledging the fact that the built city is the result of multiple spatial, social and economic conditions; the concept of “Systemic revitalization”, is framed in how to introduce new uses, users and spaces, able to synergize with the existing forces and thus be able to trigger the revitalization of urban areas. Contrary to masterplanning, this model of development encourages time-based processes and multiple initiatives, done progressively whether by typological transformation or by insertion of new typologies and uses within the existing fabric.
  • Temas:
  • Otros

Compartir este contenido

Systemic revitalization. Bogotá, exploring strategies for intensification and revitalization of the consolidated city

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de Effets de la temperature de paroi sur la reponse de la flamme a des oscillations acoustiques

Effets de la temperature de paroi sur la reponse de la flamme a des oscillations acoustiques

Por: Daniel Augusto Mejía Mejía | Fecha: 2014

Combustion instabilities, induced by the resonant coupling of acoustics and combustion occur in many practical systems such as domestic boilers, gas turbine and rocket engines. They produce pressure and heat release fluctuations that in some extreme cases can provoke mechanical failure or catastrophic damage. These phenomena have been extensively studied in the past, and the basic driving and coupling mechanisms have already been identified. However, it is well known that most systems behave differently at cold start and in the permanent regime and the coupling between the temperature of the solid material and combustion instabilities still remains unclear. The aim of this thesis is to study this mechanism. This work presents an experimental investigation of combustion instabilities for a laminar premixed flame stabilized on a slot burner with controlled wall temperature. For certain operating conditions, the system exhibits a combustion instability locked on the Helmholtz mode of the burner. It is shown that this instability can be controlled and even suppressed by changing solely the temperature of the burner rim. A linear stability analysis is used to identify the parameters playing a role in the resonant coupling and retrieves the features observed experimentally. Detailed experimental studies of the different elementary processes involved in the thermo-acoustic coupling are used to evaluate the sensitivity of these parameters to the wall temperature. Finally a theoretical model of unsteady heat transfer from the flame root to the burner-rim and detailed experimental measurements permit to establish the physical mechanism for the temperature dependance on the flame response.
  • Temas:
  • Otros

Compartir este contenido

Effets de la temperature de paroi sur la reponse de la flamme a des oscillations acoustiques

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de The owners of the land vs. the owners of the guns: a community response to violence. A case study of the Indigenous Guard s non-violent resistance in southern Colombia

The owners of the land vs. the owners of the guns: a community response to violence. A case study of the Indigenous Guard s non-violent resistance in southern Colombia

Por: Maria Elisa Balen Urrutia | Fecha: 2008

This dissertation studies the Indigenous Guard, a non-violent strategy of survival of the CRIC Indigenous Movement of southern Colombia. It seeks to understand what has made the unarmed alternative of the Indigenous Guard viable in the midst of the Colombian armed conflict. Different approaches to non-violent action are discussed, and based in this discussion it is argued that a combined attention to changing conditions in the social field and internal community dynamics is needed to account for the viability of the Indigenous Guard. Thus, the case study is pursued through attention to two levels. Firstly, it approaches the broad framework in which the CRIC operates, in which the struggle for land and changing citizenship regimes are key explanatory factors. Secondly, and in order to approach internal community dynamics, participant observation and a series of interviews with members of the communities were carried out, the results of which are presented. It is concluded that the functioning of the Indigenous Guard is based in strong norms of reciprocity – duty towards each other- that are reinforced by external referents such as the FARC guerrilla and the Colombian state. Furthermore, it is suggested that this process affects how these communities face changing political opportunities.
  • Temas:
  • Otros

Compartir este contenido

The owners of the land vs. the owners of the guns: a community response to violence. A case study of the Indigenous Guard s non-violent resistance in southern Colombia

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de Public policy frameworks for reducing social and health inequities based on determinants of health and transectorality: an exploratory qualitative study on the policy-makers’ perspectives on the Cundinamarca - Colombia experiences

Public policy frameworks for reducing social and health inequities based on determinants of health and transectorality: an exploratory qualitative study on the policy-makers’ perspectives on the Cundinamarca - Colombia experiences

Por: Ana Ragonesi Muñoz | Fecha: 2015

CONTEXT: Equity-oriented policies based on social determinants of health (SDH) and intersectoral approaches have become a high level priority on the public sector agenda (Whitehead et al, 2006) and generated much research (Roberts, 2009). However, little is known on the conditions leading to successful implementation of these policies and the challenges facing decision-makers (PAHO, 2014, WHO, 2015). This study aimed to provide more evidence on these conditions and challenges by drawing on the experience of Cundinamarca-Colombia. RESOURCES AND METHODS: This study followed an exploratory qualitative approach. Key informant interviews method was used, with face-to-face semi-structure interviews conducted with public policy-making leaders at the national (Colombia) and subnational levels (Cundinamarca). Thirty interviews were conducted from February 26 to April 14, 2015. Thematic content analysis was carried out on the interviews and Governmental documents and secondary data sources were reviewed (published literature from 1985 - 2015). RESULTS: Among the key elements identified by the participants to work on the “determinants of health” and “transectoral” approaches was the “paradigm shift” from a “dominant health thinking” of the public policies to the adoption of more “inclusive concepts” such as the determinants of quality of life. The strengthening of “territorial planning” and sectoral competencies”, the interrelation of “synergistic approaches”, and the use of Information and Communication Technologies were also mentioned. Likewise, respondents reported on a number of challenges such as the State structure and the uneven development of sectors; and barriers related to “sectoral sovereignty”. CONCLUSIONS: The analysis of the experience of Cundinamarca-Colombia has shown that emerging concepts such as “transectorality”, “Health Management Models”, and “Determinants of Quality of Life” along with considerations regarding the State structure and the role of subnational governments and communities should inform the implementation of equity-based policies. However, further work is needed to cover the full range of conditions to successful implementation and to better appraise the impact of these approaches on the population.
  • Temas:
  • Otros
  • Medicina

Compartir este contenido

Public policy frameworks for reducing social and health inequities based on determinants of health and transectorality: an exploratory qualitative study on the policy-makers’ perspectives on the Cundinamarca - Colombia experiences

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de How can mining contribute to sustainable development in Colombia? A review of stakeholders perspective and policy gaps =Cómo la minería puede contribuir al desarrollo sostenible en Colombia? Una revisión de la perspectiva de los actores...

How can mining contribute to sustainable development in Colombia? A review of stakeholders perspective and policy gaps =Cómo la minería puede contribuir al desarrollo sostenible en Colombia? Una revisión de la perspectiva de los actores...

Por: Edwin Antonio Malagón Orjuela | Fecha: 2012

With increased demand and high prices for minerals and metals in recent years, many resource rich developing countries see mining sector as vital to develop their economies. Colombia is one of these nations. Non-renewable natural resource wealth is seen as an opportunity to obtain economic benefits that can be transformed into increased wellbeing for citizens. However, mining often involves a high environmental impact and the risk of causing, or exacerbating social problems and conflicts in mining areas is significant. This study addresses the issue of ‘How then can mining contribute to sustainable development?’ in the Colombian context. This issue is critical – with 44% of the population in poverty, and the territory considered one of the most biodiverse in the world. Views obtained from interviews with representatives of stakeholder groups from government, industry and civil society and the content of national mining policy documents were compared with a selection of industry best practice guidelines in order to identify key issues for mining and sustainable development in the country. Best practice guidelines were principally drawn from the Intergovernmental Forum on Mining, Mineral, Metals and Sustainable Development policy framework and the Extractive Industries Value Chain approach. Eleven key issues were identified as important for informants: policy frameworks, institutional capacity, access to information, royalty and tax regimes, transparency, local socioeconomic development, stakeholder participation and responsibility, community trust and image, environmental performance, mine closure and illegal mining. The findings also suggest three principal gaps that need to be addressed with some priority. The focus of mining policies should be shifted from a principal focus on increased production towards sustainable development and poverty reduction objectives; better coordination between mining, environmental and national development policies and institutions towards sustainable development objectives is required; and improved technical and institutional capacity to provide an adequate assessment process and the information regarding whether the benefits from mining overcome its negative impacts ant national and local levels is needed.
  • Temas:
  • Otros
  • Ciencias sociales

Compartir este contenido

How can mining contribute to sustainable development in Colombia? A review of stakeholders perspective and policy gaps =Cómo la minería puede contribuir al desarrollo sostenible en Colombia? Una revisión de la perspectiva de los actores...

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de Cost And Benefit Analysis Of Bogota Metro Using London’s Experience With Crossrail = Analisis Costo Beneficio Del Metro De Bogota Usando La Experiencia De Crossrail En Londres

Cost And Benefit Analysis Of Bogota Metro Using London’s Experience With Crossrail = Analisis Costo Beneficio Del Metro De Bogota Usando La Experiencia De Crossrail En Londres

Por: Federico Torres | Fecha: 2008

In the last 60 years different efforts have been made for the construction of a metro system in Bogotá yet the closer the city has got to building a large transport project was with the implementation of a Bus Rapid Transport System in 1999 called Transmilenio. Transmilenio was a success at the beginning and it helped organize the chaotic transport system of the city, but at the moment it is suffering from capacity and operational problems and the need for a rail base system is evident. The current governments of Bogotá and Colombia have promised to begin the construction of the first line of the metro in the following years. Bogotá and London are two cities with similar characteristics such as population, area, density and type of soil; furthermore both cities are in the process of building a new mass transport system; in Bogotá the first line of the metro and in London Crossrail. London is a pioneer city in railways and metro systems in the world and has experience on the economic appraisal of this type of projects. In this dissertation we will use this experience to elaborate a Cost and Benefit Analysis model for the Bogotá metro. Cost and Benefit Analysis models are a common tool for the appraisal of transport and infrastructure project around the world and particularly in the UK. We have elaborated an appraisal tool for the decision makers of Colombia that involves the more important technical, social and economical aspects of the Bogotá metro project. After the evaluation of all the cost and benefits of the system and the preparation of a model with 3 different scenarios and 7 sensitivity tests the results shows that the project is completely feasible, it should be constructed and will bring benefits for the Colombian society.
  • Temas:
  • Otros

Compartir este contenido

Cost And Benefit Analysis Of Bogota Metro Using London’s Experience With Crossrail = Analisis Costo Beneficio Del Metro De Bogota Usando La Experiencia De Crossrail En Londres

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de Increasing value in architectural design by learning from different design disciplines and the use of value and design management

Increasing value in architectural design by learning from different design disciplines and the use of value and design management

Por: Elias Jose Gómez Osorio | Fecha: 2014

The architectural design process is a negotiation between a problem and a solution through activities of analysis, synthesis and evaluation, it is characterised by being complex, with neither established nor mandatory patterns and methodologies. Design is an activity that involves constant and intensive decision-making processes in which designers, clients and users exchange knowledge and information in order to develop a solution for a given problem. However, these solutions do not always bring benefits to the client, causing dissatisfaction and creating problems for both clients and designers. These problems are mostly caused by the gaps between expectation and realisation on behalf of the client, often streaming from a lack of mutual knowledge between client and designer. Design and value management is a series of activities that can help designers to monitor, control and channel creativity in order to generate accurate, precise and valuable solutions for their client’s need. However, other design disciplines such as graphic and product design have different and valuable skills and methodologies that can contribute to this aim, helping architects to create proposals that will deliver longlasting benefits for both clients and end-users.
  • Temas:
  • Otros
  • Arte

Compartir este contenido

Increasing value in architectural design by learning from different design disciplines and the use of value and design management

Copia el enlace o compártelo en redes sociales

Imagen de apoyo de L influence actuelle du rock sur l identité culturelle de Paris et Londres = La influencia actual del rock en la identidad cultural de Paris y Londres

L influence actuelle du rock sur l identité culturelle de Paris et Londres = La influencia actual del rock en la identidad cultural de Paris y Londres

Por: Francisco Barreto Callamand | Fecha: 2012

El rock es un género musical surgido a finales de 1950 en los Estados Unidos y en Gran Bretaña. Tiene sus raíces en el rock 'n' roll, el rhythm and blues, country, así como de folk y jazz. Pero el rock no es sólo un movimiento musical desde mediados de los años 1950. Él todavía está vivo, y está presente en la industria durante más de seis décadas. Poco a poco ha influido en la cultura, por ejemplo en la moda, el cine, la pintura, en la literatura. Pero ¿el rock que está en la actualidad influye en los elementos que constituyen la identidad cultural de las sociedades? Para ello, he elegido las ciudades de Londres y París, dos ciudades que son muy diferentes en lo que respecta a la identidad cultural y también en lo que respecta al rock. De esta manera mi tesis se divide en cuatro capítulos, el primer capítulo está dedicado a recordar la definición y el contexto en el que voy a usar la cultura, la identidad cultural y el rock. En el capítulo segundo y tercer lugar, me referiré a la ciudad de París y la ciudad de Londres para hacer una comparación entre los dos en términos de su situación histórica y de los elementos del rock y de su identidad cultural. El cuarto y último capítulo se responde a la pregunta inicial de si existe influencia del rock en la identidad cultural de París y Londres, de acuerdo con el análisis realizado en el segundo y tercer capítulo.
  • Temas:
  • Otros

Compartir este contenido

L influence actuelle du rock sur l identité culturelle de Paris et Londres = La influencia actual del rock en la identidad cultural de Paris y Londres

Copia el enlace o compártelo en redes sociales

Selecciona las Colecciones en las que vas a añadir el contenido

Para consultar los contenidos añadidos busca la opción Tus colecciones en el menú principal o en Mi perfil.

Mis colecciones

Cargando colecciones
Se abrirá en una nueva pestaña