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Rozprawy doktorskie na temat „Complex Social Networks”

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Data publikacji: 6 września 2023

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Marchese, Emiliano. "Optimizing complex networks models." Thesis, IMT Alti Studi Lucca, 2022. http://e-theses.imtlucca.it/356/1/Marchese_phdthesis.pdf.

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Analyzing real-world networks ultimately amounts at com- paring their empirical properties with the outcome of a proper, statistical model. The far most common, and most useful, approach to define benchmarks rests upon the so-called canonical formalism of statistical mechanics which has led to the definition of the broad class of models known as Exponential Random Graphs (ERGs). Generally speaking, employing a model of this family boils down at maximizing a likelihood function that embodies the available information about a certain system, hence constituting the desired benchmark. Although po
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Unicomb, Samuel Lee. "Threshold driven contagion on complex networks." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEN003.

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Les interactions entre les composants des systèmes complexes font émerger différents types de réseaux. Ces réseaux peuvent jouer le rôle d’un substrat pour des processus dynamiques tels que la diffusion d’informations ou de maladies dans des populations. Les structures de ces réseaux déterminent l’évolution d’un processus dynamique, en particulier son régime transitoire, mais aussi les caractéristiques du régime permanent. Les systèmes complexes réels manifestent des interactions hétérogènes en type et en intensité. Ces systèmes sont représentés comme des réseaux pondérés à plusieurs couches.
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Roth, Camille. "Co-evolution in epistemic networks : reconstructing social complex systems." Palaiseau, Ecole polytechnique, 2005. http://www.theses.fr/2005EPXX0057.

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Des agents produisant, manipulant et échangeant des connaissances constituent un système complexe socio-sémantique, dont l’étude représente un défi à la fois théorique, dans la perspective d’étendre la naturalisation des sciences sociales, et pratique, avec des applications permettant aux agents de connaître la dynamique du système dans lequel ils évoluent. Cette thèse se situe dans le cadre de ce programme de recherche. Parallèlement et plus largement, nous nous intéressons à la question de la reconstruction en sciences sociales. La reconstruction est un problème inverse comprenant deux volet
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Savoy, Daniel Prata. "A dinâmica de opinião dos debates públicos em redes sociais complexas." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/100/100132/tde-04022013-114700/.

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Neste trabalho são estudados os efeitos, causados por variações na topologia de rede, no comportamento de quatro modelos de dinâmica de opinião: o Modelo Votante, o Modelo Confiança Limitada, o Modelo da Regra da Maioria e o Modelo CODA. Primeiramente estes modelos são utilizados em simulações que usam uma série de diversas redes sociais complexas, geradas para apresentar diferentes combinações de valores de certas propriedades chave, como aglomeração, conectividade, assortatividade e distâncias internas. Em seguida, são realizados experimentos que mostram como a topologia influencia os result
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Ciotti, Valerio. "Positive and negative connections and homophily in complex networks." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/31787.

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In this thesis I investigate the effects of positive and negative connections on social and organization networks, and the presence and role of homophily in networks of scientific collaborations and citations through the combination of methodologies borrowed from complexity science, statistics, and organizational sciences. In the first part of the thesis, I study the differences between patterns of positive and negative connections among individuals in two online signed social networks. Findings suggest that the sign of links in a social network shapes differently the network's topology: there
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Abreu, Luís Fernando Dorelli de. "Estrutura e dinâmica de redes de informação." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-08112016-091004/.

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O aumento na disponibilidade de dados referentes a interação entre pessoas online tornou possível o estudo o processo de propagação de informações em redes sociais com volumes de dado antes jamais pensados. Neste trabalho, utilizamos dados do site de micro-blogging Twitter juntamente com conceitos de redes complexas para entender, caracterizar e classificar processos de difusão de informação observados nessa plataforma e em redes sociais em geral. Apresentamos importantes medidas para caracterização de cascatas de informação, bem como algoritmos eficientes para o seu cálculo. Com o auxilio des
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Libardi, Paula Luciene Oliveira 1980. "Detecção computacional de falecidos em redes sociais online." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267725.

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Orientadores: André Franceschi de Angelis, Regina Lúcia de Oliveira Moraes<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia<br>Made available in DSpace on 2018-08-27T04:53:50Z (GMT). No. of bitstreams: 1 Libardi_PaulaLucieneOliveira_M.pdf: 1610224 bytes, checksum: a08b75cd1a30c421927617ee8b6ac8d4 (MD5) Previous issue date: 2015<br>Resumo: A identificação de usuários falecidos em Redes Sociais Online é um desafio em aberto e, dado o tamanho das principais redes, abordagens que envolvam intervenção manual são impraticáveis. Usuários inativos por longo temp
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Grabowicz, Przemyslaw Adam. "Complex networks approach to modeling online social systems. The emergence of computational social science." Doctoral thesis, Universitat de les Illes Balears, 2014. http://hdl.handle.net/10803/131220.

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This thesis is devoted to quantitative description, analysis, and modeling of complex social systems in the form of online social networks. Statistical patterns of the systems under study are unveiled and interpreted using concepts and methods of network science, social network analysis, and data mining. A long-term promise of this research is that predicting the behavior of complex techno-social systems will be possible in a way similar to contemporary weather forecasting, using statistical inference and computational modeling based on the advancements in understanding and knowledge of techno
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Grando, Felipe. "On the analysis of centrality measures for complex and social networks." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/122516.

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Recentemente, as medidas de centralidade ganharam relevância nas pesquisas com redes complexas e redes sociais, atuando como preditores comportamentais, na identificação de elementos de poder e influência, na detecção de pontos estratégicos para a comunicação e para a transmissão de doenças. Novas métricas foram criadas e outras reformuladas, mas pouco tem sido feito para que se entenda a relação existente entre as diferentes medidas de centralidades, assim como sua relação com outras propriedades estruturais das redes em que elas são frequentemente aplicadas. Nossa pesquisa visa analisar e es
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Amiri, Babak. "Evolutionary Algorithms for Community Detection in Complex Networks." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10451.

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In recent years there has been a surge of community detection study of complex network analysis, since communities often play important roles in network systems. Most contemporary community detection algorithms employ single optimization criteria (i.e., modularity), which may not be adequate to represent the structures in complex networks. We suggest a community detection process as a Multi-Objective Optimization Problem (MOP) for investigating the community structures in complex networks. To overcome the limitations of community detection problems, we propose new multi-objective optimization
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Grönlund, Andreas. "Complex patterns : from physical to social interactions." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-801.

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Interactions are what gives us the knowledge of the world around us. Interactions on all levels may fundamentally be seen as an exchange of information and a possible response of the same. Whether it is an electron in an electrical field or a handsome dude in a bar responding to a flirtation---interactions make things happen. In this sense we can see that objects without the capability of interacting with each other also are invisible to each other. Chains of pairwise interacting entities can serve as mediators of indirect interactions between objects. Nonetheless, in the limit of no interacti
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Nastos, James. "Utilizing graph classes for community detection in social and complex networks." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/53014.

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Social network analysis is a cross-disciplinary study of interest to mathematicians, physicists, computer scientists and sociologists. It deals with looking at large networks of interactions and extracting useful or meaningful information from them. One attribute of interest is that of identifying social communities within a network: how such a substructure should be defined is a widely-studied problem in itself. With each new definition, there is a need to study in what applications or context such a definition is appropriate, and develop algorithms and complexity results for the computation
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13

Hill, Robert M. Martin Barbara N. "Leadership capacity in a complex connected age." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/7033.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 26, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Barbara N. Martin. Vita. Includes bibliographical references.
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Hannesson, Kristófer. "Identifying Important Members in a Complex Online Social Network." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216947.

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The success of Online Social Networks (OSN) is influenced by having the ability to understand who is important. An OSN can be viewed as a graph where users are vertices and their interactions are edges. Graph-based methods can enable identification of people in these networks who for example exhibit the characteristics of leaders, influencers, or information brokers. A Massively Multiplayer Online game (MMO) is a type of OSN. It is a video game where a large number of players interact with each other in a virtual world. Using behavioral data of players' interactions within the space-based MMO
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Bell, Patrick M. "Development of Local Homeland Security Networks in the State of Florida: A Social Network Analysis Approach." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/574.

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How do local homeland security organizations respond to catastrophic events such as hurricanes and acts of terrorism? Among the most important aspects of this response are these organizations ability to adapt to the uncertain nature of these “focusing events” (Birkland 1997). They are often behind the curve, seeing response as a linear process, when in fact it is a complex, multifaceted process that requires understanding the interactions between the fiscal pressures facing local governments, the institutional pressures of working within a new regulatory framework and the political pressures o
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Gabardo, Ademir cristiano. "A heuristic to detect community structures in dynamic complex networks." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/970.

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Complex networks are ubiquitous; billions of people are connected through social networks; there is an equally large number of telecommunication users and devices generating implicit complex networks. Furthermore, several structures can be represented as complex networks in nature, genetic data, social behavior, financial transactions and many other structures. Most of these complex networks present communities in their structure. Unveiling these communities is highly relevant in many fields of study. However, depending on several factors, the discover of these communities can be computational
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Erlandsson, Fredrik. "Human Interactions on Online Social Media : Collecting and Analyzing Social Interaction Networks." Doctoral thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15503.

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Online social media, such as Facebook, Twitter, and LinkedIn, provides users with services that enable them to interact both globally and instantly. The nature of social media interactions follows a constantly growing pattern that requires selection mechanisms to find and analyze interesting data. These interactions on social media can then be modeled into interaction networks, which enable network-based and graph-based methods to model and understand users’ behaviors on social media. These methods could also benefit the field of complex networks in terms of finding initial seeds in the inform
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Morini, Matteo. "Tools for Understanding the Dynamics of Social Networks." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEN075/document.

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Cette thèse fournit au lecteur un recueil d'applications de la théorie des graphes ; à ce but, des outils sur mesure, adaptés aux applications considérées, ont été conçus et mis en œuvre de manière inspirée par les données.Dans la première partie, une nouvelle métrique de centralité, nommée “bridgeness”, est présentée, basée sur une décomposition de la centralité intermédiaire (“betweenness centrality”) standard. Une composante, la “connectivité locale”, correspondante approximativement au degré d'un noeud, est différenciée de l'autre, qui, en revanche, évalue les propriétés structurelles à lo
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DILIBERTO, Simona. "Households and their Expenditures as an Evolving Complex Social System." Doctoral thesis, Università degli Studi di Palermo, 2020. http://hdl.handle.net/10447/395284.

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Friggeri, Adrien. "A Quantitative Theory of Social Cohesion." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2012. http://tel.archives-ouvertes.fr/tel-00737199.

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Community, a notion transversal to all areas of Social Network Analysis, has drawn tremendous amount of attention across the sciences in the past decades. Numerous attempts to characterize both the sociological embodiment of the concept as well as its observable structural manifestation in the social network have to this date only converged in spirit. No formal consensus has been reached on the quantifiable aspects of community, despite it being deeply linked to topological and dynamic aspects of the underlying social network. Presenting a fresh approach to the evaluation of communities, this
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Martins, Rafael Franco. "Uma proposta de modelagem por agentes para o problema da herança e desigualdade econômica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/100/100132/tde-12042017-111602/.

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Nos últimos anos a preocupação com uma possível elevação da desigualdade social aumentou consideravelmente, principalmente por conta da obra de Piketty intitulada O Capital no século XXI. Para Piketty a diminuição da natalidade entre os ricos será um dos pontos cruciais para este aumento. As previsões contidas no livro são avassaladoras, se nada for feito a desigualdade aumentará a ponto de ameaçar a democracia e os sistemas políticos e sociais vigentes. Porém, alguns economistas, como por exemplo: Matthew Rognlie, não concordam com esta tese e apontam supostos erros e falhas cometidos pelo ec
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Araújo, Eduardo Barbosa. "Scientific Collaboration Networks from Lattes Database: Topology, Dynamics and Gender Statistics." reponame:Repositório Institucional da UFC, 2016. http://www.repositorio.ufc.br/handle/riufc/18489.

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ARAÚJO, Eduardo Barbosa. Scientific Collaboration Networks from Lattes Database: Topology, Dynamics and Gender Statistics. 2016. 88 f. Tese (Doutorado em Física) - Programa de Pós-Graduação em Física, Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2016.<br>Submitted by Edvander Pires (edvanderpires@gmail.com) on 2016-07-19T15:58:54Z No. of bitstreams: 1 2016_tese_ebaraujo.pdf: 3600069 bytes, checksum: a78e83ffda97c499e589b405da4da3c8 (MD5)<br>Approved for entry into archive by Edvander Pires (edvanderpires@gmail.com) on 2016-07-19T15:59:07Z (GMT) No. of b
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Kasper, Eric Calvin. "Nurturing emergent agency : networks and dynamics of complex social change processes in Raipur, India." Thesis, University of Sussex, 2017. http://sro.sussex.ac.uk/id/eprint/66943/.

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This thesis takes up the question, how can agency for people living in informal settlements be strengthened? To address this question, I carried out systemic action research with two NGO partners and residents from seven informal settlements in Raipur, India. This involved organizing ‘slum improvement committees' (SICs) in each of the seven settlements and carrying out joint actions in support of housing rights and implementation of the Rajiv Awas Yojana (RAY) housing policy. The data on which my analysis is based includes over one hundred conversations between myself and the project participa
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Godoy, Lorite Antonia. "Time Evolution and Predictability of Social Behavior in Techno-Social Networks." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/348873.

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El fet que cada vegada disposem de més dades socials de sistemes socio-tecnològics---sistemes que registren la nostra activitat diària, tals com a registres de targeta de crèdit, registres de trucades telefòniques, correu electrònic, etc.---i les xarxes socials on-line---com facebook, twitter, instagram, etc.---, ha fet possible estudiar el comportament humà des de diferents perspectives. Descobrir els patrons darrere d'aquestes dades no només aportarà un millor coneixement de la societat, sinó que també beneficiaria a la societat en diferents aspectes, com l'adaptació de tecnologia a les nece
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Monti, C. C. "MODELING AND MINING COMPLEX NETWORKS WITH FEATURE-RICH NODES." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/485805.

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Real-world complex networks describe connections between objects; in reality, those objects are typically endowed with features. How does the presence or absence of such features interplay with the network link structure? The idea is to be able to represent a wide range of scenarios — not only homophily and heterophily. In this work, as a first thing we will present an ad-hoc statistical model, showing it displays the same global topological properties of a real-world social network. Then, we will use this model to design and analyze learning algorithms for graph mining problems – such as pred
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Orman, Keziban. "Contribution to the interpretation of evolving communities in complex networks : Application to the study of social interactions." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0072/document.

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Les réseaux complexes constituent un outil pratique pour modéliser les systèmes complexes réels. Pour cette raison, ils sont devenus très populaires au cours de la dernière décennie. De nombreux outils existent pour étudier les réseaux complexes. Parmi ceux-ci, la détection de la communauté est l’un des plus importants. Une communauté est grossièrement définie comme un groupe de nœuds plus densément connectés entre eux qu’avec le reste du réseau. Dans la littérature, cette définition intuitive a été formalisée de plusieurs différentes façons, ce qui a conduit à d’innombrables méthodes et varia
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Kolgushev, Oleg. "Influence of Underlying Random Walk Types in Population Models on Resulting Social Network Types and Epidemiological Dynamics." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc955128/.

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Epidemiologists rely on human interaction networks for determining states and dynamics of disease propagations in populations. However, such networks are empirical snapshots of the past. It will greatly benefit if human interaction networks are statistically predicted and dynamically created while an epidemic is in progress. We develop an application framework for the generation of human interaction networks and running epidemiological processes utilizing research on human mobility patterns and agent-based modeling. The interaction networks are dynamically constructed by incorporating differen
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Livelsberger, Tara L. ""Lost" in conversations complex social behavior in Online environments /." Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1244226331.

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Mina, Christakis. "Open Technological Standardization Processes Through Learning Networks." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120839.

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Srivastava, Sameer Bhatt. "Social Capital Activation during Times of Organizational Change." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10158.

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This dissertation contributes to our understanding of how people build and use social capital – resources embedded in social relations – in organizational settings. Whereas the extant literature has tended to focus on the structure of interpersonal networks within organizations and the link to various indicators of individual attainment, this dissertation instead uncovers the dynamics of network action. I tackle two central questions: (1) During times of organizational change, how do organizational actors use the social resources accessible to them by virtue of their position in the structure?
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Mass, Lena M. "Analysing technology & innovation in complex networks : processes, dynamics, and development of multi-level interorganisational networks." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:a0280ae4-0523-4b23-8f4d-5e4f880fdcb1.

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There is still very little known about network dynamics (Bell et al., 2006), especially when focusing on interorganisational networks (Provan et al., 2007). There is also limited empirical evidence on leadership within these complex network contexts (Davenport, 2005; Osborn et al., 2002). This thesis addresses these limitations by developing a theoretical framework for process leadership in the complex, often unpredictable and turbulent context of the interorganisational networked ecosystem. Understanding the complexity of networks and leadership is crucial to advancing network research, which
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Santos, Francisco C. "Topological evolution: from biological to social networks." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210702.

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Peter, Camaren. "Bayesian participatory-based decision analysis : an evolutionary, adaptive formalism for integrated analysis of complex challenges to social-ecological system sustainability." Doctoral thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/18284.

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Includes bibliographical references (pages. 379-400).<br>This dissertation responds to the need for integration between researchers and decision-makers who are dealing with complex social-ecological system sustainability and decision-making challenges. To this end, we propose a new approach, called Bayesian Participatory-based Decision Analysis (BPDA), which makes use of graphical causal maps and Bayesian networks to facilitate integration at the appropriate scales and levels of descriptions. The BPDA approach is not a predictive approach, but rather, caters for a wide range of future scenario
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Dugué, Nicolas. "Analyse du capitalisme social sur Twitter." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2081/document.

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Le sociologue Bourdieu définit le capital social comme : "L’ensemble des ressources actuelles ou potentielles qui sont liées à la possession d’un réseau durable de relations". Sur Twitter, les abonnements, mentions et retweets créent un réseau de relations pour chaque utilisateur dont les ressources sont l’obtention d’informations pertinentes, la possibilité d’être lu, d’assouvir un besoin narcissique, de diffuser efficacement des messages.Certains utilisateurs Twitter -appelés capitalistes sociaux - cherchent à maximiser leur nombre d’abonnements pour maximiser leur capital social. Nous intro
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AraÃjo, Eduardo Barbosa. "Scientific Collaboration Networks from Lattes Database: Topology, Dynamics and Gender Statistics." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17184.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Compreender a dinÃmica de produÃÃo e colaboraÃÃo em pesquisa pode revelar melhores estratÃgias para carreiras cientÃficas, instituiÃÃes acadÃmicas e agÃncias de fomento. Neste trabalho nÃs propomos o uso de uma grande e multidisciplinar base de currÃculos cientÃficos brasileira, a Plataforma Lattes, para o estudo de padrÃes em pesquisa cientÃfica e colaboraÃÃes. Esta base de dados inclui informaÃÃes detalhadas acerca de publicaÃÃes e pesquisadores. CurrÃculos individuais sÃo enviados pelos prÃprios pesquisadores de forma que a id
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Dulac, Adrien. "Etude des modèles à composition mixée pour l'analyse de réseaux complexes." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAM080/document.

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Les données relationnelles sont omniprésentes dans la nature et leur accessibilité ne cesse d'augmenter depuis ces dernières années. Ces données, vues comme un tout, forment un réseau qui peut être représenté par une structure de données appelée graphe où chaque nœud du graphe est une entité et chaque arête représente une relation ou connexion entre ces entités. Les réseaux complexes en général, tels que le Web, les réseaux de communications ou les réseaux sociaux sont connus pour exhiber des propriétés structurelles communes qui émergent aux travers de leurs graphes. Dans cette thèse, nous me
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37

Martinez, MaryAnn. "Human Centeredness: The Foundation for Leadership-as-Practice in Complex Local/Regional Food Networks." Antioch University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1624179376157514.

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RADICIONI, Tommaso. "All the ties that bind. A socio-semantic network analysis of Twitter political discussions." Doctoral thesis, Scuola Normale Superiore, 2021. http://hdl.handle.net/11384/109224.

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Social media play a crucial role in what contemporary sociological reflections define as a ‘hybrid media system’. Online spaces created by social media platforms resemble global public squares hosting large-scale social networks populated by citizens, political leaders, parties and organizations, journalists, activists and institutions that establish direct interactions and exchange contents in a disintermediated fashion. In the last decade, an increasing number of studies from researchers coming from different disciplines has approached the study of the manifold facets of citizen partic
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Rocha, Luis E. C. "Exploring patterns of empirical networks." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46588.

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We are constantly struggling to understand how nature works, trying to identify recurrent events and looking for analogies and relations between objects or individuals. Knowing patterns of behavior is powerful and fundamental for survival of any species. In this thesis, datasets of diverse systems related to transportation, economics, sexual and social contacts, are characterized by using the formalisms of time series and network theory. Part of the results consists on the collection and analyzes of original network data, the rest focuses on the simulation of dynamical processes on these netwo
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De, Luca Giancarlo. "Decision Making in Complex Environments: an adaptive network approach." Doctoral thesis, SISSA, 2013. http://hdl.handle.net/20.500.11767/4808.

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In this thesis we investigate decision making in complex environments using adaptive network models. We first focus on the problem of consensus decision making in large animal groups. Each individual has an internal state that models its choice among the possible q alternatives and we assume that each individual updates its internal state using a majority rule, if it is connected to other individuals, or using a probabilistic rule. In this case, if the individual has no information, the choice shall be totally random, otherwise the probabilistic rule shall have a bias toward one of the
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Cambe, Jordan. "Understanding the complex dynamics of social systems with diverse formal tools." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN043/document.

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Au cours des deux dernières décennies les objets connectés ont révolutionné la traçabilité des phénomènes sociaux. Les trajectoires sociales laissent aujourd'hui des traces numériques, qui peuvent être analysées pour obtenir une compréhension plus profonde des comportements collectifs. L'essor de grands réseaux sociaux (comme Facebook, Twitter et plus généralement les réseaux de communication mobile) et d'infrastructures connectées (comme les réseaux de transports publiques et les plate-formes en ligne géolocalisées) ont permis la constitution de grands jeux de données temporelles. Ces nouveau
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JAVARONE, MARCO ALBERTO. "Models and frameworks for studying social behaviors." Doctoral thesis, Università degli Studi di Cagliari, 2013. http://hdl.handle.net/11584/266244.

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Studies on social systems and human behavior are typically considered domain of humanities and psychology. However, it appears that recently these issues have attracted a strong interest also from the scienti�c community belonging to the hard sciences {in particular from physics, computer science and mathematics. The network theory o�ers powerful tools to study social systems and human behavior. In particular, complex networks have gained a lot of prestige as general framework for representing and analyze real systems. From an historical perspective, complex networks are rooted in graph theo
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43

Kurka, David Burth 1988. "Online social networks = knowledge extraction from information diffusion and analysis of spatio-temporal phenomena = Redes sociais online: extração de conhecimento e análise espaço-temporal de eventos de difusão de informação." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259074.

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Orientador: Fernando José Von Zuben<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-27T03:14:35Z (GMT). No. of bitstreams: 1 Kurka_DavidBurth_M.pdf: 1660677 bytes, checksum: 7258daf8129b4dac9d1f647195775d3c (MD5) Previous issue date: 2015<br>Resumo: Com o surgimento e a popularização de Redes Sociais Online e de Serviços de Redes Sociais, pesquisadores da área de computação têm encontrado um campo fértil para o desenvolvimento de trabalhos com grande volume de dados, modelos envolvendo múlt
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MORENO, Bruno Neiva. "Representação e análise de encontros espaço-temporais publicados em redes sociais online." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18621.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2017-04-24T14:37:15Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) tese_bnm_OK.pdf: 5126585 bytes, checksum: 5ccba23295950094b489a2df805e0815 (MD5)<br>Made available in DSpace on 2017-04-24T14:37:15Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) tese_bnm_OK.pdf: 5126585 bytes, checksum: 5ccba23295950094b489a2df805e0815 (MD5) Previous issue date: 2016-09-09<br>O crescente uso de redes sociais online tem feito com
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Gómez, Cerdà Vicenç. "Algorithms and complex phenomena in networks: Neural ensembles, statistical, interference and online communities." Doctoral thesis, Universitat Pompeu Fabra, 2008. http://hdl.handle.net/10803/7548.

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Aquesta tesi tracta d'algoritmes i fenòmens complexos en xarxes.<br/><br/>En la primera part s'estudia un model de neurones estocàstiques inter-comunicades mitjançant potencials d'acció. Proposem una tècnica de modelització a escala mesoscòpica i estudiem una transició de fase en un acoblament crític entre les neurones. Derivem una regla de plasticitat sinàptica local que fa que la xarxa s'auto-organitzi en el punt crític.<br/><br/>Seguidament tractem el problema d'inferència aproximada en xarxes probabilístiques mitjançant un algorisme que corregeix la solució obtinguda via belief propagation
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Valejo, Alan Demetrius Baria. "Refinamento multinível em redes complexas baseado em similaridade de vizinhança." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-14042015-142526/.

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No contexto de Redes Complexas, particularmente das redes sociais, grupos de objetos densamente conectados entre si, esparsamente conectados a outros grupos, são denominados de comunidades. Detecção dessas comunidades tornou-se um campo de crescente interesse científico e possui inúmeras aplicações práticas. Nesse contexto, surgiram várias pesquisas sobre estratégias multinível para particionar redes com elevada quantidade de vértices e arestas. O objetivo dessas estratégias é diminuir o custo do algoritmo de particionamento aplicando-o sobre uma versão reduzida da rede original. Uma possibili
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Müller-Hansen, Finn. "A complex systems perspective on land-use dynamics in the Amazon: patterns, agents, networks." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19476.

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Die Doktorarbeit untersucht, wie sich Mensch-Umwelt-Interaktionen am Beispiel von Abholzung und Landnutzungsänderungen im Amazonas analysieren und modellieren lassen. Die Abholzung tropischer Wälder bedroht die Stabilität artenreicher Ökosysteme, lokaler Wettergeschehen und des globalen Klimas. Drei Hauptteile erforschen das Thema mit Konzepten der theoretischen Physik und Netzwerktheorie. Der erste Teil gibt einen kritischen Überblick über Modellansätze, die Entscheidungen und menschliches Verhalten beschreiben. Agentenbasierte Netzwerkmodelle ergeben sich als vielversprechender Ansatz um soz
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Palazzi, Nieves María José. "Structural and dynamical interdependencies in complex networks at meso- and macroscale: nestedness, modularity, and in-block nestedness." Doctoral thesis, Universitat Oberta de Catalunya, 2020. http://hdl.handle.net/10803/671886.

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Many real systems like the brain are considered to be complex, i.e. they are made of several interacting components and display a collective behaviour that cannot be inferred from how the individual parts behave. They are usually described as networks, with the components represented as nodes and the interactions between them as links. Research into networks mainly focuses on exploring how a network's dynamic behaviour is constrained by the nature and topology of the interactions between its elements. Analyses of this sort are performed on three scales: the microscale, based on single nodes; t
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Silva, Juliana Saragiotto. "Métricas de análise de redes sociais e sua aplicação em redes de interação biológicas: metodologia de aplicação e estudos de caso." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-22052015-154651/.

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Diversos pesquisadores têm se utilizado do recurso de Redes de Interação na área de Biodiversidade para analisar o papel das espécies na estrutura da uma rede cujos fundamentos conceituais são os mesmos das Redes Sociais (como Facebook, LinkedIn, entre outras). Nesse sentido, algoritmos, métricas e recursos computacionais e estatísticos provenientes da área de Análise de Redes Sociais (Social Network Analysis SNA) são ferramentas importantes para endereçar/apoiar estudos com interações. Assim sendo, o objetivo desta tese é propor uma metodologia para aplicação das métricas de SNA em estudos
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Campos, Ronaldo Ribeiro de. "Redes complexas e ações para compartilhamento de conhecimento: uma análise de redes sociais em um ambiente web para apoio à aprendizagem." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18157/tde-24062014-105925/.

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A Gestão do Conhecimento pode ser definida como um conjunto de processos para coletar, armazenar, compartilhar e utilizar o conhecimento. No contexto deste trabalho, o processo de compartilhamento do conhecimento é aceito como um elemento fundamental para a realização da Gestão do Conhecimento, pois representa a interação entre os indivíduos que compõem uma rede de relacionamentos da qual o conhecimento emerge. A Análise de Redes Sociais (ARS) apresenta métricas que permitem identicar os relacionamentos da rede e analisálos, porém ainda existem necessidades de identificar ações que possam refl
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