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Una expresión explícita para la potencia media de pruebas de no inferioridad para la comparación de proporciones. Colegio de Postgraduados
Anguiano Mondragón, Emmanuel.
Las pruebas de no-inferioridad para comparar proporciones son frecuentemente empleadas en los ensayos clínicos con el objeto de verificar si hay evidencia muestral de que un tratamiento nuevo no es significativamente inferior en eficacia al tratamiento estándar, donde el tratamiento nuevo presenta algunas ventajas sobre el tratamiento estándar como por ejemplo: tener menos efectos secundarios, ser más barato o ser más fácil de aplicar. Un buen número de pruebas de no-inferioridad se han reportado en la literatura. Desafortunadamente, las comparaciones de las pruebas de no inferioridad reportadas hasta ahora son insatisfactorias pues se han realizado utilizando simulaciones o aproximaciones gruesas. Utilizando el concepto de “potencia media”, Martín-Andrés...
Palavras-chave: Pruebas de no-inferioridad; Potencia; Potencia media; Tamaños de prueba; Non-inferiority tests; Power; Mean power; Test size; Estadística; Doctorado.
Ano: 2013 URL: http://hdl.handle.net/10521/2185
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Identidades femeninas: Proyecto de empoderamiento de mujeres, 2004, Celaya, Guanajuato Colegio de Postgraduados
Delgado Piña, Deborah.
Esta investigación hace un análisis en torno a la identidad, a partir de una vivencia concreta: Proyecto de empoderamiento (2004). Tiene los objetivos de conocer el vínculo que se establece entre el empoderamiento de las mujeres y los cambios que se suscitan en su identidad así como conocer desde su discurso, los cambios que ellas detectan en su identidad (autoreconocimiento, autoconcepto, autoestima). Se buscó determinar que el proyecto de Empoderamiento de Mujeres, 2004, en Celaya, Gto. ha influido para promover cambios en la identidad de las siete mujeres que participaron, en el plano personal, familiar y comunitario. Las técnicas utilizadas fueron: observación, entrevista, relato de vida, test Machover, test htp y test de la familia. El...
Tipo: Tesis Palavras-chave: Identidad; Poder; Cambios; Programa; Proyecto; Maestría; Desarrollo Rural; Power; Identity; Changes; Program; Project.
Ano: 2008 URL: http://hdl.handle.net/10521/1291
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Pruebas para la distribución exponencial con dos parámetros. Colegio de Postgraduados
Celis Euán, David Israel.
En el análisis estadístico de tiempos de vida, la distribución exponencial ha sido tomada como referencia en las áreas de Análisis de Supervivencia y teoría de Confiabilidad. En el presente trabajo se propone una prueba basada en la razón de dos estimadores insesgados del cuadrado del parámetro de escala. Para poder hacer la prueba de exponencialidad, el análisis de la prueba propuesta se divide en dos casos. Un caso se dá cuando el parámetro de localidad es cero, y el otro caso cuando ambos parámetros son desconocidos y distintos de cero. De los estudios de pruebas de exponencialidad realizadas por D’Agostino y Stephens(1984), se deduce que la prueba Cox-Oakes es de las más potentes que existen en la actualidad. Otra prueba de interés es la de Shapiro-...
Palavras-chave: Prueba estadística; Simulación Monte Carlo; Potencia; Tamaño de la prueba; Pruebas de bondad de ajuste; Goodness of fit tests; Statistical test; Monte Carlo simulation; Power; Size of the test; Maestría; Estadística.
Ano: 2012 URL: http://hdl.handle.net/10521/703
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Prueba de bondad de ajuste para la distribución Gumbel para datos censurados tipo II, basada en la divergencia de Kullback-Leibler. Colegio de Postgraduados
Salinas Ruíz, Víctor.
Se propone una prueba de bondad de ajuste para la distribución Gumbel para datos censurados Tipo II. Esta prueba se basa en la metodología de discriminación de Lim & Park (2007), que utilizan la Divergencia de Kullback & Leibler (1951) adaptada para datos censurados Tipo II. Los valores críticos se obtuvieron mediante simulación Monte Carlo para diferentes tamaños de muestra y porcentajes de censura. La potencia y tamaño de la prueba se comparó con la prueba del Coeficiente de Correlación basado en los estimadores de Kaplan & Meier (1958) y Nelson (1972) - Aalen (1978). Los resultados de la simulación, muestran que la prueba basada en la Divergencia de Kullback-Leibler es superior a las otras pruebas en términos de potencia. _______________...
Palavras-chave: Entropía; Simulación Monte Carlo; Coeficiente de Correlación; Potencia; Tamaño de la Prueba; Entropy; Monte Carlo Simulation; Correlation Coefficient; Power; Size of the test; Estadística; Maestría.
Ano: 2011 URL: http://hdl.handle.net/10521/649
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Prueba de bondad de ajuste para la distribución Gumbel para datos censurados tipo II, basada en la divergencia de Kullback-Leibler. Colegio de Postgraduados
Salinas Ruíz, Víctor.
Se propone una prueba de bondad de ajuste para la distribución Gumbel para datos censurados Tipo II. Esta prueba se basa en la metodología de discriminación de Lim & Park (2007), que utilizan la Divergencia de Kullback & Leibler (1951) adaptada para datos censurados Tipo II. Los valores críticos se obtuvieron mediante simulación Monte Carlo para diferentes tamaños de muestra y porcentajes de censura. La potencia y tamaño de la prueba se comparó con la prueba del Coeficiente de Correlación basado en los estimadores de Kaplan & Meier (1958) y Nelson (1972) - Aalen (1978). Los resultados de la simulación, muestran que la prueba basada en la Divergencia de Kullback-Leibler es superior a las otras pruebas en términos de potencia. _______________...
Palavras-chave: Entropía; Simulación Monte Carlo; Coeficiente de Correlación; Potencia; Tamaño de la Prueba; Entropy; Monte Carlo Simulation; Correlation Coefficient; Power; Size of the test; Estadística; Maestría.
Ano: 2011 URL: http://hdl.handle.net/10521/649
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National REDD+ policy networks: from cooperation to conflict Ecology and Society
Brockhaus, Maria; Center for International Forestry Research; m.brockhaus@cgiar.org; Di Gregorio, Monica; University of Leeds, Sustainability Research Institute; m.digregorio@leeds.ac.uk.
Reducing emissions from deforestation and forest degradation (REDD+) is a financial mechanism aimed at providing incentives to reduce carbon emissions from forests and enhance carbon stocks. In most forest-rich developing countries, policy actors, i.e., state and nonstate as well as international and national, are designing national REDD+ policies. Actors’ interests and beliefs shape patterns of interactions, ranging from cooperation to conflict, and these interactions influence a country’s direction and progress in REDD+ policy formulation and implementation. We used a comparative policy network approach to analyze the power structures in national REDD+ policy domains in seven countries. We drew on the typology of power structures...
Tipo: Peer-Reviewed Reports Palavras-chave: Comparative analysis; Conflict; Cooperation; Policy networks; Power; REDD+; Social network analysis.
Ano: 2014
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The power problematic: exploring the uncertain terrains of political ecology and the resilience framework Ecology and Society
Ingalls, Micah L; Poverty-Environment Initiative, United Nations Development Programme; Human Dimensions Research Unit, Department of Natural Resources, Cornell University; mli6@cornell.edu; Stedman, Richard C; Human Dimensions Research Unit, Department of Natural Resources, Cornell University; rcs6@cornell.edu.
Significant and growing concerns relating to global social and environmental conditions and processes have raised deep questions relating to the ability of traditional governance regimes to manage for the complexities of social-ecological systems. The resilience framework provides a more dynamic approach to system analysis and management, emphasizing nonlinearity, feedbacks, and multiscalar engagement along the social-ecological nexus. In recent years, however, a number of scholars and practitioners have noted various insufficiencies in the formulation of the resilience framework, including its lack of engagement with the dimensions of power within social-ecological systems, which blunt the analytical potential of resilience and run the risk of undermining...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Political ecology; Power; Resilience; Social-ecological systems.
Ano: 2016
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People, Power, and the Coast: a Conceptual Framework for Understanding and Implementing Benefit Sharing Ecology and Society
Wynberg, Rachel; Environmental Evaluation Unit, Department of Environmental and Geographical Science, University of Cape Town; rachel.wynberg@uct.ac.za; Hauck, Maria; Environmental Evaluation Unit, Department of Environmental and Geographical Science, University of Cape Town; MHauck4@gmail.com.
The concept of benefit sharing has seen growing adoption in recent years by a variety of sectors. However, its conceptual underpinnings, definitions, and framework remain poorly articulated and developed. We aim to help address this gap by presenting a new conceptual approach for enhancing understanding about benefit sharing and its implementation. We use the coast as a lens through which the analysis is framed because of the intricate governance challenges which coastal social–ecological systems present, the increasing development and exploitation pressures on these systems, and the growing need to improve understanding about the way in which greater equity and reduced inequalities could reduce conflicts, protect coastal ecosystems, and ensure...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Coastal communities; Governance; Inequality; Power.
Ano: 2014
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Mismatch Between Scales of Knowledge in Nepalese Forestry: Epistemology, Power, and Policy Implications Ecology and Society
Ahlborg, Helene; Environmental Systems Analysis, Chalmers University of Technology; helene.ahlborg@chalmers.se; Nightingale, Andrea J.; Institute of Geography and the Lived Environment, School of GeoSciences, University of Edinburgh; School of Global Studies, University of Gothenburgh; andrea.nightingale@ed.ac.uk.
Tipo: Peer-Reviewed Reports Palavras-chave: Community forestry; Knowledge scales; Natural resource management; Nepal; Power; Scale.
Ano: 2012
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REDD+ policy networks: exploring actors and power structures in an emerging policy domain Ecology and Society
Brockhaus, Maria; Center for International Forestry Research; m.brockhaus@cgiar.org; Di Gregorio, Monica; University of Leeds, Sustainability Research Institute; m.digregorio@leeds.ac.uk; Carmenta, Rachel; Center for International Forestry Research; R.Carmenta@cgiar.org.
Policy making is often neither rational nor solution-oriented, but driven by negotiations of interests of multiple actors that increasingly tend to take place in policy networks. Such policy networks integrate societal actors beyond the state, which all aim, to different degrees, at influencing ongoing policy processes and outcomes. Reducing Emissions from Deforestation and Forest Degradation (REDD+) can be considered as such an emerging policy domain, in which actors cooperate and conflict in network structures, build coalitions and try to control information and finance flows relevant for REDD+ decision making. This special feature is the result of an extensive comparative research effort to investigate national level REDD+ policy processes and emerging...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Agency; Climate change; Comparative analysis; Discourse coalitions; Policy network analysis; Power; REDD+; SNA; Transformational change.
Ano: 2014
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Power Asymmetries in Small-Scale Fisheries: a Barrier to Governance Transformability? Ecology and Society
Crona, Beatrice; Stockholm Resilience Center, Stockholm University, Sweden; beatrice.crona@stockholmresilience.su.se.
Both global and local environmental problems call for the transformation of many contemporary and unsustainable governance approaches. Therefore, recent interest has sprung up around factors that facilitate and hinder societies from transforming governance of natural resources. Using a social-network approach, we study links between informal power structures and knowledge sharing and consensus building. We examine how this interaction may have affected the (in)ability of a community to move from open-access to some form of collective action for resource management. Individuals occupying central positions in a knowledge network can be instrumental in determining which knowledge and interpretation of ecological signals is most dominant. If the same...
Tipo: Peer-Reviewed Reports Palavras-chave: Comanagement; Governance; Local ecological knowledge; Natural resources; Power; Social networks; Transformation.
Ano: 2010
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An Integrated Approach to Analyzing (Adaptive) Comanagement Using the “Politicized” IAD Framework Ecology and Society
Whaley, Luke; Water Science Institute, Cranfield University; l.whaley@cranfield.ac.uk; Weatherhead, Edward K.; Water Science Institute, Cranfield University; k.weatherhead@cranfield.ac.uk.
Scholars of comanagement are faced with a difficult methodological challenge. As comanagement has evolved and diversified it has increasingly merged with the field of adaptive management and related concepts that derive from resilience thinking and complex adaptive systems theory. In addition to earlier considerations of power sharing, institution building, and trust, the adaptive turn in comanagement has brought attention to the process of social learning and a focus on concepts such as scale, self-organization, and system trajectory. At the same time, a number of scholars are calling for a more integrated approach to studying (adaptive) comanagement that is able to situate these normative concepts within a critical understanding of how context and power...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Comanagement; Adaptive comanagement; IAD Framework; Politicized IAD Framework; Methodology; Institutions; Power; Discourse; Resilience.
Ano: 2014
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Governance of Aquatic Agricultural Systems: Analyzing Representation, Power, and Accountability Ecology and Society
Ratner, Blake D.; WorldFish; b.ratner@cgiar.org; Cohen, Philippa; ARC Centre of Excellence for Coral Reef Studies, James Cook University; WorldFish; p.cohen@cgiar.org; Barman, Benoy; WorldFish; b.barman@cgiar.org; Mam, Kosal; WorldFish; k.mam@cgiar.org; Nagoli, Joseph; WorldFish; j.nagoli@cgiar.org; Allison, Edward H.; School of International Development, University of East Anglia; WorldFish; e.allison@cgiar.org.
Aquatic agricultural systems in developing countries face increasing competition from multiple stakeholders over rights to access and use natural resources, land, water, wetlands, and fisheries, essential to rural livelihoods. A key implication is the need to strengthen governance to enable equitable decision making amidst competition that spans sectors and scales, building capacities for resilience, and for transformations in institutions that perpetuate poverty. In this paper we provide a simple framework to analyze the governance context for aquatic agricultural system development focused on three dimensions: stakeholder representation, distribution of power, and mechanisms of accountability. Case studies from Cambodia, Bangladesh, Malawi/Mozambique,...
Tipo: Peer-Reviewed Reports Palavras-chave: Accountability; Bangladesh; Cambodia; Civil society; Coastal zone management; Environmental governance; Livelihoods; Malawi; Mozambique; Power; Social-ecological resilience; Solomon Islands; Stakeholder representation; Wetlands.
Ano: 2013
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Evaluating Responses in Complex Adaptive Systems: Insights on Water Management from the Southern African Millennium Ecosystem Assessment (SAfMA) Ecology and Society
Bohensky, Erin; University of Pretoria; ebohensky@zoology.up.ac.za; Lynam, Timothy; University of Zimbabwe; tlynam@science.uz.ac.zw.
Ecosystem services are embedded in complex adaptive systems. These systems are riddled with nonlinearities, uncertainties, and surprises, and are made increasingly complex by the many human responses to problems or changes arising within them. In this paper we attempt to determine whether there are certain factors that characterize effective responses in complex systems. We construct a framework for response evaluation with three interconnected scopes or spatial and temporal domains: the scope of an impact, the scope of the awareness of the impact, and the scope of the power or influence to respond. Drawing from the experience of the Southern African Millennium Ecosystem Assessment (SAfMA), we explore the applicability of this framework to the example of...
Tipo: Peer-Reviewed Reports Palavras-chave: Responses; Complex adaptive systems; Ecosystem services; Southern Africa; Water management; Impact; Awareness; Power.
Ano: 2005
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The Political Economy of Cross-Scale Networks in Resource Co-Management Ecology and Society
Adger, W. Neil; Tyndall Centre for Climate Change Research; n.adger@uea.ac.uk; Brown, Katrina; University of East Anglia; k.brown@uea.ac.uk; Tompkins, Emma L.; University of East Anglia; e.tompkins@uea.ac.uk.
We investigate linkages between stakeholders in resource management that occur at different spatial and institutional levels and identify the winners and losers in such interactions. So-called cross-scale interactions emerge because of the benefits to individual stakeholder groups in undertaking them or the high costs of not undertaking them. Hence there are uneven gains from cross-scale interactions that are themselves an integral part of social-ecological system governance. The political economy framework outlined here suggests that the determinants of the emergence of cross-scale interactions are the exercise of relative power between stakeholders and their costs of accessing and creating linkages. Cross-scale interactions by powerful stakeholders have...
Tipo: Peer-Reviewed Insight Palavras-chave: Caribbean; Institutions; Marine protected areas; Natural resource management; Power; Social-ecological resilience; Transaction costs..
Ano: 2005
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Conceptualizing power to study social-ecological interactions Ecology and Society
Boonstra, Wiebren J; Stockholm Resilience Centre, Stockholm University; wijnand.boonstra@su.se.
My aim is to conceptualize power using social science theory and to demonstrate why and how the concept of power can complement resilience studies and other analyses of social-ecological interaction. Social power as a scientific concept refers to the ability to influence both conduct and context. These two dimensions of power (conduct and context) can be observed by differentiating between various sources of power, including, for example, technology or mental power. The relevance of the conceptualization of power presented here is illustrated with the example of fire as a source of social-ecological power. I conclude by discussing how attention to power can help to address issues of social justice and responsibility in social-ecological interactions.
Tipo: Peer-Reviewed Synthesis Palavras-chave: Fire domestication; Power; Resilience; Social responsibility; Social-ecological interactions; Sociology.
Ano: 2016
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Social-ecological systems, social diversity, and power: insights from anthropology and political ecology Ecology and Society
Fabinyi, Michael; Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University; michael.fabinyi@jcu.edu.au; Evans, Louisa; Geography, College of Life and Environmental Sciences, University of Exeter; louisa.evans@exeter.ac.uk; Foale, Simon J; Department of Anthropology, Archaeology and Sociology, James Cook University; simon.foale@jcu.edu.au.
A social-ecological system (SES) framework increasingly underpins the “resilience paradigm.” As with all models, the SES comes with particular biases. We explore these key biases. We critically examine how the SES resilience literature has attempted to define and analyze the social arena. We argue that much SES literature defines people’s interests and livelihoods as concerned primarily with the environment, and thereby underplays the role of other motivations and social institutions. We also highlight the SES resilience literature’s focus on institutions and organized social units, which misses key aspects of social diversity and power. Our key premise is the importance of inter- and multi-disciplinary perspectives....
Tipo: Peer-Reviewed Synthesis Palavras-chave: Anthropology; Political ecology; Power; Social diversity; Social-ecological system.
Ano: 2014
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From Resilience to Transformation: the Adaptive Cycle in Two Mexican Urban Centers Ecology and Society
Pelling, Mark; King's College London; mark.pelling@kcl.ac.uk; Manuel-Navarrete, David; King's College London; david.manuel_navarrete@kcl.ac.uk.
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive cycle; Climate change; Disaster management; Mexico; Power; Resilience; Transformation.
Ano: 2011
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Probing the interfaces between the social sciences and social-ecological resilience: insights from integrative and hybrid perspectives in the social sciences Ecology and Society
Stone-Jovicich, Samantha; CSIRO Land and Water Flagship, Adaptive Social and Economic Sciences Program; samantha.stone-jovicich@csiro.au.
Social scientists, and scholars in related interdisciplinary fields, have critiqued resilience thinking’s oversimplification of social dimensions of coupled social-ecological systems. Resilience scholars have countered with “where is the ecology” in social analyses? My aim is to contribute to current efforts to strengthen inter- and transdisciplinary debate and inquiry between the social-ecological resilience community and the social sciences. I synthesize three social science perspectives, which stress the complex, dynamic, and multiscalar interconnections between the biophysical and social realms in explaining social-environmental change, and which place both the social and ecology centre stage in their analyses:...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Actor-network theory; Agency; ANT; Human-environment relations; Hybrid perspectives; Interdisciplinary; Normative issues; Political ecology; Power; Social-ecological resilience; Social-ecological systems; Social sciences; Social systems; Transdisciplinary; World systems analysis.
Ano: 2015
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Equity, Power Games, and Legitimacy: Dilemmas of Participatory Natural Resource Management Ecology and Society
Barnaud, Cecile; INRA, UMR1201 DYNAFOR; Toulouse University, INPT-ENSAT; Toulouse University, INPT EI Purpan ; cecile.barnaud@toulouse.inra.fr; Van Paassen, Annemarie; Knowledge, Technology and Innovation Group, Wageningen University;.
Tipo: Peer-Reviewed Reports Palavras-chave: Critical systems; Inequity; Participatory approach; Power; Reflexivity; Transdisciplinarity.
Ano: 2013
Registros recuperados: 55
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