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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Selection model to choose innovative building systems for progressive housing with special reference to Metro Manila, Philippines

Astrand, Rachelle Navarro January 2002 (has links)
No description available.
32

Design and Case Study Application of a Participatory Decision-making Support Tool for Appropriate Safe Water Systems Development in Marginalized Communities of the Global South

Ali, Syed Imran 18 June 2012 (has links)
This dissertation presents the design and case study application of a participatory decision-making support tool for appropriate safe water systems development in marginalized low-income communities of the global South. The tool focuses on the resolution of two key design decisions: 1) selecting the appropriate level of application (i.e. household or community level) for a safe water system; and 2) selecting an appropriate water treatment technology (or technologies). The tool breaks the process down into four stages. First are pre-implementation steps which develop a contextualized, baseline understanding of the local community. Second is community-based field research, including focus groups and key informant/informal interviews, to investigate the two key design questions by exploring local preferences, capacities, and circumstances with community-members, government officers, NGO workers, and other stakeholders. Third are analytical steps to integrate information from baseline, informal, and primary research to generate recommendations on the two key design questions. This includes a comparative analysis of household and community level systems; a technology feasibility flowchart; performance assessments of technological alternatives with respect to appropriate technology criteria; and a multi-factor analysis to integrate information from the preceding analytical steps. Fourth are community forums in which further participatory action and research is planned on the basis of the recommendations emerging from the tool. Through these steps, the decision-making support tool guides implementing organizations through the stages of safe water systems design and planning in a manner that centres local people in the process. The tool weaves together several theoretical and methodological strands including humanitarian engineering, post-normal science, appropriate technology, participatory development, grounded theory, engineering decision-making, and water treatment engineering. The case study application of the decision-making support tool was conducted in a marginalized peri-urban community called Mylai Balaji Nagar in Chennai, India. This indicated that a household level approach is more appropriate for the case study community and that the TATA Swach filter, alum coagulation with chlorination, or boiling, in order of decreasing suitability, may be appropriate technologies for household application in the case study community. / Degree: Doctor of Philosophy Department: School of Engineering Advisor: Hall, Kevin / International Development Research Centre (IDRC)
33

Selection model to choose innovative building systems for progressive housing with special reference to Metro Manila, Philippines

Astrand, Rachelle Navarro January 2002 (has links)
A crucial factor to enable low-income families to participate in the gradual development of their homes is to find a link between their building activities and those of the large-scale building sector. Amidst technological development and increasing demand for housing, the large-scale sector, such as government and private groups, resorted to industrialised housing to replace traditional and conventional building materials and methods. Industrialisation, however, resulted not only in expensive and inappropriate dwellings but also eliminated homeowners from the building process and management of their homes. To bring back the homeowners in the building process, the shift was towards the production of small components and partial prefabrication. / Following the same thrust, there have been numerous innovative building systems for housing developed in the Philippines in the last two decades. Private entrepreneurs develop these building systems either promoting locally invented systems or adapting imported versions. Seeing their potentials, government and private groups are trying to employ them in housing. Despite the growing number of the innovative building systems and the interest to use them, their integration in low-income housing is still limited. / Focusing on Metro Manila, the capital region of the Philippines, the thesis aims to develop a selection model for the effective integration of innovative building systems in low-income housing. The process of integration is not simply using the building systems for mass production of houses but also enabling homeowners to utilise, maintain and sustain them. The proposed model involves sets of selection parameters essential at each stage of the housing delivery based on the homeowners' progressive building process and their criteria for choosing building materials for their homes. To facilitate progressive building and enhance the homeowners' initiative to build, the model also includes design strategies when employing new building systems and suggests the necessary channels to ensure the availability of the building systems, technical assistance and information.
34

Conceptualization of appropriate technology in Lundazi District of rural Zambia

Tembo, Mwizenge. January 1987 (has links)
Thesis (Ph. D.)--Michigan State University, 1987. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 268-276).
35

Open Source Hardware for Human Development

Herrera, Alfredo January 2015 (has links)
Human Development is not a term used in casual conversation, it describes the current approach used by large aide international development organizations like the United Nations; but most people are familiar with the terms “emergency relief” and “humanitarian intervention”. Emergency relief focuses on providing assistance to save lives, alleviate suffering, or protect populations; while human development uses various societal levers to improve living conditions. The United Nation has been publishing an annual report on human development since 1990 (UNDP 1990), and it is widely recognized as a consistent measure of global living conditions. Development strategies revolve around a transfer of something valuable to an aided population: education, vaccination, fertilizers, etc. In technology-based human development projects, technology artefacts (a medical record computer system, solar electrification systems, irrigation) and related knowledge (education, operation and maintenance instruction) are those valuables being transferred. The benefits of technology are specific to each economy, and dependant on how quickly technology is adapted and integrated in the local economy (Cypher & Dietz 2008). The value of ideas increases to the degree they can be shared with and used by others (Houghton & Sheehan 2000): the more knowledge is diffused and adopted, the greater its value. The success of free and open-source software exemplifies this principle, and a growing number of scholars agree that the model also applies to hardware (Balka et al. 2009; Thompson 2008). This thesis presents research on open source hardware and its knowledge-sharing approach as a means to human development. It presents a model that leverages the collaborative design methodology of open hardware for adoption of artefacts that address pressing “humanitarian technology” needs, for example, in health or education. To achieve this, critical literature reviews on open source and on technology-based human development are first done; the findings from literature are then complemented with the findings from interviews and case studies to model a sustainable deployment strategy for open source use in human development projects. Adopting the human development paradigm defined in the first Human Development Report (“HDR1990”), which aims at three people-centered aspirations: to live a long and healthy life, to be educated and to have access to resources needed for a decent standard of living (UNDP 1990). This thesis research models its deployment strategy using the Soft Systems Methodology (SSM), showing that: (a) open source hardware, like any technology used in development, can magnify effective development programs when used appropriately; (b) Dr. E.F. Schumacher’s appropriate technology principles, and P. Polak’s reinstatement, mesh very well with the open source methodology, as long as required constituents in the aided communities are taken care of (availability of electricity, internet access, technical know-how, etc.); (c) extreme affordability is particularly important for open source hardware, because a sustainable strategy is based on the belief that aided population would want to procure these artifacts if they improve their earning potential; (d) participatory human development practices work well with the open source methodology, but “solutions” must be fully verified before deployment. This document is structured in 5 chapters: introduction, literature review, research strategies, case studies and interviews, and conclusion. The appendix include three articles published on parallel work for the Institute of Electrical and Electronic Engineers (IEEE) on defining a strategy for the IEEE’s use of opens source technology in their humanitarian activities. This research provides insight into the new topic of open source hardware and its proposed use in the mission critical context of international development; because entrepreneurship is a key enabler to the strategy it describes, I hope the research can support future work on that aspect.
36

Opportunities, constraints and challenges to the introduction of ICT services for sustainable agricultural development in West Bengal, India / Möjligheter, begräsningar och utmaningar för introduktionen av ICT-tjänster för hållbar jordbruksutveckling i Västbengalen, Indien

Kendall, Linus January 2015 (has links)
The application of information and communication technology (ICT) in socioeconomic development often referred to as “ICT for development” (ICT4D) is an increasingly relevant concern both academically as well as within development organisations on all levels.   This master thesis project has explored opportunities, constraints and challenges to designing and implementing mobile phone based ICT services for an organisation working with sustainable agricultural development in West Bengal, India. Through a participatory design process with smallholding farmers a simple, low-cost platform for prototyping and implementing mobile phone based ICT services using interactive voice response as interaction modality was developed. It was found that even inexperienced and illiterate users were able to understand and make use of such services with minimal training. On the basis of services deployed on this platform, context specific constraints and opportunities were identified as well as the appropriateness of the ICT design evaluated. Finally, use of participation was critically reviewed and found to be a necessary element of ICT design in this context yet requiring a high level of reflexivity and contextual understanding from the researcher or designer in order to contribute to development goals. / Användning av informations och kommunikationsteknologi (ICT) för socioekonomisk utveckling ofta kallat ”ICT for development” (ICT4D) är i allt högre grad en relevant fråga både akademiskt och inom utvecklingsorganisationer på alla nivåer. Detta exjobb utforskade möjligheter, begränsningar och utmaningar för introduktionen av mobilbaserade ICT-tjänster åt en organisation som arbetar med hållbar jordbruksutveckling i Västbengalen i Indien. Genom en deltagande designprocess med småskaliga bönder så utvecklades en enkel, billig plattform för att skapa prototyper och implementera mobiltjänster som använder sig av ”Interactive Voice Response” som interaktionsmodalitet. Även personer med begränsad erfarenhet av ICT samt begränsad läs- och skrivkunnighet kunde förstå och använda tjänster utvecklade på plattformen med minimal träning. Med grund i tjänster utvecklade på denna plattform så utvärderades lämpligheten för ICT i den lokala kontexten och flera kontext-specifika begränsningar och utmaningar identifierades. Slutligen så utvärderades ”deltagande” i design processen metodologiskt och fanns vara ett nödvändigt element av ICT-design i denna kontext samtidigt som det kräver en hög grad av reflexivitet och kontext-specifik förståelse från forskaren eller designern för att kunna bidra till utvecklingsmål.
37

Design of a Human-Powered Utility Vehicle for Developing Communities

Cyders, Timothy J. 29 December 2008 (has links)
No description available.
38

Análise por impedância eletroquímica \"on-line\" de conjuntos eletrodo/membrana (MEA) de células a combustível a membrana polimérica (PEMFC) / Analysis for impedance electrochemistry \"on-line\" of membrane/electrode assemble (MEA) of protons exchange membrane fuel cells (PEMFC)

Santos, Antonio Rodolfo dos 15 August 2007 (has links)
Este trabalho apresenta resultados de estudos e caracterizações de Conjuntos Eletrodo/Membrana (MEAs) de Células a Combustível a Membrana Polimérica (PEMFC). Algumas condições de operação de células e diferentes processos de produção de MEA foram investigados. A técnica de Espectroscopia de Impedância Eletroquímica (EIE) (em situ - 0 a 16 A) foi usada \"on-line\" como uma ferramenta de diagnóstico, relativa ao desempenho de célula. As medidas de EIE foram feitas através do Sistema de EIE para células a combustível FC350 (GAMRY), junto a um PC4 Potentiostato/Galvanostato e conectado à carga dinâmica (TDI) para experimentos de EIE \"on-line\" (100 mHz - 10 kHz, dU = 5 mV). MEAs com 25 cm2 de área ativa, usando eletrocatalisadores PtM/C 20 % (M = Ru, Sn ou Ni) fabricados usando o Método de Redução por Álcool (MRA). A tinta catalítica foi diretamente aplicada no Tecido de Carbono (GDL) e este prensado na membrana de Nafion® (105). MEAs usando eletrocatalisadores Pt/C e PtRu/C 20 % da E-TEK foram fabricados para comparação. Todos os cátodos foram confeccionados com Pt/C 20% da E-TEK. Foram fixadas as concentrações de metal nobre em 0,4 mg Pt.cm-2 no anodo e 0,6 mg Pt.cm-2 no catodo (E-TEK). Diagramas de Nyquist dos MEAs com Pt/C e PtRu/C da E-TEK ou PtM/C MRA apresentaram as mesmas resistências de ôhmicas para os MEAs. Este fato pode ser explicado por supressão de aglomerados durante o processo de preparação do MEA ou pela homogeneidade do eletrocatalisador ancorado ao carbono. Também pôde ser observado, a baixas densidades atuais que há uma diferença de desempenho significante entre o eletrocatalisadores da ETEK e os preparados pelo MRA. Os resultados das curvas de polarização confirmaram que PtM/C MRA apresentara um aumento de atividade para as células alimentadas com metanol e etanol. A técnica de EIE se mostrou eficiente para a avaliação do método de preparação dos MEAs e do desempenho da célula, os resultados de EIE mostraram uma coerência na escolha do modelo do circuito elétrico para os MEAs utilizando hidrogênio, metanol e etanol. Esta coerência indica que outras resistências não consideradas no modelo não são relevantes na resistência total dos MEAs. / This work reports results of studies and characterization on Membrane Electrode Assemblies (MEAs) for Proton Exchange Membrane Fuel Cell (PEMFC). Some cell operation conditions and different processes of MEA production were investigated. The Electrochemical Impedance Spectroscopy Technique (EIS) (in situ - 0 to 16 A) was used \"on-line\" as a tool for diagnosis, concerning the cell performance. The EIS measurements were carried out with a FC350 Fuel Cell EIS System (GAMRY), coupled to a PC4 Potentiostat/Galvanostat and connected to the electronic load (TDI) for \"on-line\" EIS experiments (100 mHz - 10 kHz, dU = 5 mV). MEAs with 25 cm2 surface area, using PtM/C 20% (M = Ru, Sn or Ni) electrocatalysts were manufactured using the Alcohol Reduction Process (ARP). The catalytic ink was applied directly into the Carbon Cloth (GDL) and pressed in the NafionR membrane (105). MEAs using Pt/C and PtRu/C 20% from E-TEK electrocatalysts were manufactured by comparison. All the cathodes were sprayed with Pt/C 20% from E-TEK. The noble metal concentrations used were set to 0.4 mg Pt.cm-2 at the anode and 0.6 mg Pt.cm-2 at the cathode (E-TEK). Nyquist diagrams of the MEAs with Pt/C and PtRu/C from E-TEK or PtM/C (M = Ru, Sn or Ni) ARP showed essentially the same ohmic resistances for the MEAs. This fact can be explained by suppression of agglomerates during the MEA preparation process or by the homogeneity of the anchored electrocatalysts at the carbon surface. It could also be observed, at low current densities, that there was a significant performance difference between the electrocatalysts from E-TEK and those prepared with the Alcohol Reduction Process. The polarization curves results confirmed that the PtM/C (M = Ru, Sn or Ni) ARP showed an activity increase for the methanol and ethanol fed cells. The technique of EIE was shown efficient for the evaluation of the method preparation of MEAs and the acting of the cell, the results of EIE showed coherence in the choice of the model the electric circuit for MEAs using hydrogen, methanol and ethanol. This coherence indicates that other resistances no considered in the model are not relevant in the total resistance of MEAs.
39

Energizing Sustainable Livelihoods. A Study of Village Level Biodiesel Development in Orissa, India

Vaidyanathan, Geeta 30 November 2009 (has links)
The present worldwide scenario is one of land-based livelihoods that are increasingly vulnerable to the impacts of climate change. While being committed to environmental goals, India’s National Action Plan on Climate Change released in 2008, reaffirms that maintaining a high growth rate is essential to raising the standard of living of the people. Curbing emissions while maintaining high growth rates and achieving the Millennium Development Goals without increase in fossil fuel consumption, both appear to be paradoxes. Community-based micro energy initiatives have the potential to support productive development without fossil fuel consumption. This study examines small scale, village level biodiesel production for local use, based on unutilized and under-utilized, existing oil seeds in remote rural locations in Orissa, India. The village level biodiesel model is a response to large agro-industrial models that promote plantation of energy crops like jatropha, and to centralized production of biofuels as an alternative to petrodiesel. Village level biodiesel adds value to the large quantity of locally unutilized forest seeds and underutilized short duration oilseed crops like niger that are exported as birdfeed, to fuel livelihoods and boost the local economy. The development of a village level biodiesel model in a participatory manner within an agroecosystem boundary, and its ability to catalyze livelihoods that are sustainable, have been analyzed. Participant observation techniques have been used to develop narrative case studies for three village communities. Methodology for the study is based on Participatory Action Research approaches (Kemmis et al., 2000), where the research process has contributed to community action. The Sustainable Livelihood approach forms an important foundation of this research. A conceptual framework adapted from the original Sustainable Livelihood Framework (Scoones, 1998), to include Complex Systems Thinking (Holling, et al., 1995, Kay, et al., 1999) was used to analyze case studies in two communities of Orissa, India. Informed by results in the first two case communities, the same framework was used to develop a livelihood strategy based on Village Level Biodiesel (VLB), in a third cluster of villages also in Orissa. Three additional inclusions are proposed as a result of the research, to address some gaps in the original framework. These are the concepts of (1) Entitlements (Leach, et al., 1997) to understand power structures, (2) Adaptation Continuum (McGray 2007) to include issues of climate impacts and (3) Rural Livelihood System (Hogger, 2004) as a complex whole relating the inner reality of the farmer to the outer reality of a swiftly globalizing world. Resilience of livelihoods was identified as a key outcome parameter. Three main considerations for assessing sustainability and resilience of livelihoods, as defined by this research are (1) potential for livelihood diversity and intensity, (2) connectedness of the institutions involved in the decision making process, and (3) adaptation – that is resilience of livelihoods in terms of their capacity to resist drivers of vulnerability and confront impacts of climate change. The VLB in Orissa approaches livelihood diversity and intensity through a three-pronged approach consisting of biodiesel fuelled livelihoods, sustainable agriculture and local value addition. Careful attention is given to the specifics of the context in designing the VLB, thus enhancing the adaptive capacity of the technology. In the context of India, with the devolution of power to the local level, the Gram Sabha, or the village governing council, has political powers and the ability to negotiate with the State because of the authority vested in it by the 73rd amendment to the Constitution of India, and can additionally regulate the market at the local level. Leveraging the powers of this entity may provide the VLB with the needed impetus to replicate and move beyond pilot implementations. Obstacles in the implementation and strategies to overcome these have been identified. The challenge to future research and action is to span regional, national and global levels to influence policy makers to take cognizance of and promote the VLB as a viable development alternative to agro-industrial models designed to generate transport fuel.
40

Energizing Sustainable Livelihoods. A Study of Village Level Biodiesel Development in Orissa, India

Vaidyanathan, Geeta 30 November 2009 (has links)
The present worldwide scenario is one of land-based livelihoods that are increasingly vulnerable to the impacts of climate change. While being committed to environmental goals, India’s National Action Plan on Climate Change released in 2008, reaffirms that maintaining a high growth rate is essential to raising the standard of living of the people. Curbing emissions while maintaining high growth rates and achieving the Millennium Development Goals without increase in fossil fuel consumption, both appear to be paradoxes. Community-based micro energy initiatives have the potential to support productive development without fossil fuel consumption. This study examines small scale, village level biodiesel production for local use, based on unutilized and under-utilized, existing oil seeds in remote rural locations in Orissa, India. The village level biodiesel model is a response to large agro-industrial models that promote plantation of energy crops like jatropha, and to centralized production of biofuels as an alternative to petrodiesel. Village level biodiesel adds value to the large quantity of locally unutilized forest seeds and underutilized short duration oilseed crops like niger that are exported as birdfeed, to fuel livelihoods and boost the local economy. The development of a village level biodiesel model in a participatory manner within an agroecosystem boundary, and its ability to catalyze livelihoods that are sustainable, have been analyzed. Participant observation techniques have been used to develop narrative case studies for three village communities. Methodology for the study is based on Participatory Action Research approaches (Kemmis et al., 2000), where the research process has contributed to community action. The Sustainable Livelihood approach forms an important foundation of this research. A conceptual framework adapted from the original Sustainable Livelihood Framework (Scoones, 1998), to include Complex Systems Thinking (Holling, et al., 1995, Kay, et al., 1999) was used to analyze case studies in two communities of Orissa, India. Informed by results in the first two case communities, the same framework was used to develop a livelihood strategy based on Village Level Biodiesel (VLB), in a third cluster of villages also in Orissa. Three additional inclusions are proposed as a result of the research, to address some gaps in the original framework. These are the concepts of (1) Entitlements (Leach, et al., 1997) to understand power structures, (2) Adaptation Continuum (McGray 2007) to include issues of climate impacts and (3) Rural Livelihood System (Hogger, 2004) as a complex whole relating the inner reality of the farmer to the outer reality of a swiftly globalizing world. Resilience of livelihoods was identified as a key outcome parameter. Three main considerations for assessing sustainability and resilience of livelihoods, as defined by this research are (1) potential for livelihood diversity and intensity, (2) connectedness of the institutions involved in the decision making process, and (3) adaptation – that is resilience of livelihoods in terms of their capacity to resist drivers of vulnerability and confront impacts of climate change. The VLB in Orissa approaches livelihood diversity and intensity through a three-pronged approach consisting of biodiesel fuelled livelihoods, sustainable agriculture and local value addition. Careful attention is given to the specifics of the context in designing the VLB, thus enhancing the adaptive capacity of the technology. In the context of India, with the devolution of power to the local level, the Gram Sabha, or the village governing council, has political powers and the ability to negotiate with the State because of the authority vested in it by the 73rd amendment to the Constitution of India, and can additionally regulate the market at the local level. Leveraging the powers of this entity may provide the VLB with the needed impetus to replicate and move beyond pilot implementations. Obstacles in the implementation and strategies to overcome these have been identified. The challenge to future research and action is to span regional, national and global levels to influence policy makers to take cognizance of and promote the VLB as a viable development alternative to agro-industrial models designed to generate transport fuel.

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