890 resultados para Theory and Algorithms


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In many real world contexts individuals find themselves in situations where they have to decide between options of behaviour that serve a collective purpose or behaviours which satisfy one’s private interests, ignoring the collective. In some cases the underlying social dilemma (Dawes, 1980) is solved and we observe collective action (Olson, 1965). In others social mobilisation is unsuccessful. The central topic of social dilemma research is the identification and understanding of mechanisms which yield to the observed cooperation and therefore resolve the social dilemma. It is the purpose of this thesis to contribute this research field for the case of public good dilemmas. To do so, existing work that is relevant to this problem domain is reviewed and a set of mandatory requirements is derived which guide theory and method development of the thesis. In particular, the thesis focusses on dynamic processes of social mobilisation which can foster or inhibit collective action. The basic understanding is that success or failure of the required process of social mobilisation is determined by heterogeneous individual preferences of the members of a providing group, the social structure in which the acting individuals are contained, and the embedding of the individuals in economic, political, biophysical, or other external contexts. To account for these aspects and for the involved dynamics the methodical approach of the thesis is computer simulation, in particular agent-based modelling and simulation of social systems. Particularly conductive are agent models which ground the simulation of human behaviour in suitable psychological theories of action. The thesis develops the action theory HAPPenInGS (Heterogeneous Agents Providing Public Goods) and demonstrates its embedding into different agent-based simulations. The thesis substantiates the particular added value of the methodical approach: Starting out from a theory of individual behaviour, in simulations the emergence of collective patterns of behaviour becomes observable. In addition, the underlying collective dynamics may be scrutinised and assessed by scenario analysis. The results of such experiments reveal insights on processes of social mobilisation which go beyond classical empirical approaches and yield policy recommendations on promising intervention measures in particular.

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The conceptual component of this work is about "reference surfaces'' which are the dual of reference frames often used for shape representation purposes. The theoretical component of this work involves the question of whether one can find a unique (and simple) mapping that aligns two arbitrary perspective views of an opaque textured quadric surface in 3D, given (i) few corresponding points in the two views, or (ii) the outline conic of the surface in one view (only) and few corresponding points in the two views. The practical component of this work is concerned with applying the theoretical results as tools for the task of achieving full correspondence between views of arbitrary objects.

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The biplot has proved to be a powerful descriptive and analytical tool in many areas of applications of statistics. For compositional data the necessary theoretical adaptation has been provided, with illustrative applications, by Aitchison (1990) and Aitchison and Greenacre (2002). These papers were restricted to the interpretation of simple compositional data sets. In many situations the problem has to be described in some form of conditional modelling. For example, in a clinical trial where interest is in how patients’ steroid metabolite compositions may change as a result of different treatment regimes, interest is in relating the compositions after treatment to the compositions before treatment and the nature of the treatments applied. To study this through a biplot technique requires the development of some form of conditional compositional biplot. This is the purpose of this paper. We choose as a motivating application an analysis of the 1992 US President ial Election, where interest may be in how the three-part composition, the percentage division among the three candidates - Bush, Clinton and Perot - of the presidential vote in each state, depends on the ethnic composition and on the urban-rural composition of the state. The methodology of conditional compositional biplots is first developed and a detailed interpretation of the 1992 US Presidential Election provided. We use a second application involving the conditional variability of tektite mineral compositions with respect to major oxide compositions to demonstrate some hazards of simplistic interpretation of biplots. Finally we conjecture on further possible applications of conditional compositional biplots

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In this class, we will discuss network theory fundamentals, including concepts such as diameter, distance, clustering coefficient and others. We will also discuss different types of networks, such as scale-free networks, random networks etc. Readings: Graph structure in the Web, A. Broder and R. Kumar and F. Maghoul and P. Raghavan and S. Rajagopalan and R. Stata and A. Tomkins and J. Wiener Computer Networks 33 309--320 (2000) [Web link, Alternative Link] Optional: The Structure and Function of Complex Networks, M.E.J. Newman, SIAM Review 45 167--256 (2003) [Web link] Original course at: http://kmi.tugraz.at/staff/markus/courses/SS2008/707.000_web-science/

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For COMP60

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A brief one lecture introduction to Game Theory and Addiction techniques for building a games.

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An analysis of the alternatives of compensation in relation to international investment disputes is relevant, because a pecuniary award is not always the appropriate remedy to solve disputes arising between investors and States. This is the case because States may be increasingly interested in opting for a different type of compensation. Furthermore, it is still not clear whether arbitral tribunals have recognised alternative types of awarding damages in respect of international investments disputes. This analysis comprises two principal components, the first, is to identify whether or not the tribunals may render an award that not only demands the payment of a sum of money but also considers some other means of compensation. The second, centres on how compliance with these non-pecuniary awards may be demanded. Our approach to these two principal components will always revolve around the idea of respecting the sovereignty of the State, bearing in mind that the execution of an arbitral award, which obliges the State to refrain from or to perform an act in its territory, relies precisely on the sovereignty of the State to execute it. 

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Esta obra es producto de la primera, y única, Reunión Hispano-Soviética de Prehistoriadores organizada por el Departamento de Prehistoria del Centro de Estudios Históricos en el marco del convenio entre la Academia de Ciencias de la U.R.S.S. y el C.S.I.C. español. Su objetivo es promover contactos entre investigadores de ambos países. La publicación se divide en catorce partes: 1. Prefacio. 2. Prólogo. 3. El Centro de Estudios Históricos. 4. El Departamento de Prehistoria. 5. El Instituto de Arqueología de la Academia de Ciencias de Rusia. 6. Gonzalo Ruiz Zapatero. 7. Rauv M. Munchaez (ponencia). 8. Emiliano Aguirre Enríquez (ponencia). 9. Valery P. Alekseev (ponencia). 10. Alfonso Moure Romanillo (ponencia). 11. Jizri A. Amirjanoz (ponencia). 12. Eugenio N. Chernij (ponencia). 13. Arturo Ruiz Rodríguez (ponencia). 14. Valery I. Gulaiev.

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Este documento presenta una visión amplia de la Teoría de Integración Económica desde el punto de vista de la teoría de unión aduanera. Se argumenta que dicha teoría carece de integración y que los recientes desarrollos en el tema no parecen resolver esta falla. A pesar de esto, se sugiere que los desarrollos teóricos surgidos a partir del trabajo seminal de Viner y posteriormente desarrollados por otros teóricos, son aún útiles como herramienta de investigación empírica en el tema.

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Es un texto para la enseñanza de la lengua inglesa en las escuelas secundarias dirigido a los profesores que estudian, están recién titulados ó son experimentados docentes. Cumple con los requisitos del plan nacional de estudios inglés para el año 2000 y con la Estrategia Nacional de Alfabetización (National Literacy Strategy) para la etapa 3 (key stage 3). Entre sus objetivos están: dar ideas prácticas específicas que vinculen la teoría y la práctica y estimular el pensamiento crítico sobre la enseñanza del inglés.

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Examina los aspectos que son importantes para una enseñanza y aprendizaje eficaz en las escuelas. El recurso está dividido en tres partes que reflejan las tres tareas fundamentales de la formación docente: la primera parte se centra en ayudar a los profesores a reforzar su conocimiento y comprensión de una enseñanza eficaz y el aprendizaje del alumno; la segunda parte se centra en los aspectos individuales de buenas prácticas en el aula; desde la creación de la experiencia de aprendizaje teniendo en cuenta las diferencias pedagógicas fundamentales hasta el establecimiento de relaciones constructivas con los alumnos. La tercera parte reflexiona sobre la experiencia docente. Esta edición incluye el aprendizaje personalizado, los nuevos avances en la TIC, la enseñanza interactiva. También contiene una terminología actualizada.

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Este texto es una guía para la enseñanza de la ciencia primaria según lo establecido en las normas profesionales para la acreditación docente (QTS) en Inglaterra y el Reino Unido. Cada capítulo incluye estudios de casos de situaciones para ayudar a los alumnos a establecer el vínculo entre la teoría y la enseñanza práctica en el aula. También se incluyen en cada capítulo resúmenes de investigaciones clave para guiar a los estudiantes en una comprensión más profunda de los fundamentos teóricos de la enseñanza, ideas para actividades prácticas en el aula y un glosario de los principales términos científicos.

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La teoría sociocultural es una teoría de la evolución de las funciones mentales superiores que tiene sus raíces en la filosofía alemana de los siglos dieciocho y diecinueve. Esta publicación integra la teoría, la investigación y la práctica en el aprendizaje de segundas lenguas extranjeras, desde una perspectiva sociocultural. También describe e ilustra el uso de la teoría como apoyo a las innovaciones conceptuales y prácticas en la educación de segunda lengua.