Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-18T20:55:13Z No. of bitstreams: 1 MademersonLeandroDaCosta_TESE.pdf: 1891375 bytes, checksum: 6977d7d34bb28c61fa6a511b98c8df53 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-24T22:28:38Z (GMT) No. of bitstreams: 1 MademersonLeandroDaCosta_TESE.pdf: 1891375 bytes, checksum: 6977d7d34bb28c61fa6a511b98c8df53 (MD5) / Made available in DSpace on 2017-10-24T22:28:39Z (GMT). No. of bitstreams: 1 MademersonLeandroDaCosta_TESE.pdf: 1891375 bytes, checksum: 6977d7d34bb28c61fa6a511b98c8df53 (MD5) Previous issue date: 2017-06-09 / Um sistema de tarefas em espa?os m?tricos ? um modelo abstrato para uma classe de problemas de otimiza??o online, incluindo o problema de pagina??o de mem?ria, listas de acesso, problemas na ind?stria do petr?leo como o gerenciamento de sondas de produ??o terrestre (workover rigs) e de log?stica na produ??o de petr?leo offshore, o problema dos K-Servos, dentre outros. A utiliza??o da aprendizagem por refor?o na solu??o destes problemas, embora tenha se mostrado eficiente, est? restrita a uma classe simples de problemas, devido ? maldi??o da dimensionalidade inerente ao m?todo. Neste trabalho, apresenta-se uma solu??o que utiliza a aprendizagem por refor?o, baseada em t?cnicas de decomposi??o hier?rquica e computa??o paralela para solu??o de problemas de otimiza??o em espa?os m?tricos, com o objetivo de estender a aplicabilidade do m?todo a problemas complexos na ind?stria petrol?fera, contornando a restri??o da sua utiliza??o a problemas te?ricos de menor porte. A dimens?o da estrutura de armazenamento utilizada pela aprendizagem por refor?o para se obter a pol?tica ?tima cresce em fun??o do n?mero de estados e de a??es, sendo diretamente proporcional ao n?mero n de n?s e k de servos, fazendo com que o crescimento da complexidade do problema se d? de maneira exponencial (?????(??)). Para contorn?-lo, o problema foi modelado com um processo de decis?o em m?ltiplas etapas onde inicialmente utilizamos o algoritmo k-means como m?todo de agrupamento visando decompor o problema em subproblemas de menor dimens?o. Em seguida foi aplicado o algoritmo Q-learning nos subgrupos buscando-se atingir a melhor pol?tica de deslocamento dos servos. Nesta etapa, foram utilizadas t?cnicas de computa??o paralela para que os processos de aprendizado e armazenamento nos subgrupos fossem executados de forma paralela. Desta forma, a dimens?o do problema e o tempo total de execu??o do algoritmo foram reduzidos, viabilizando a aplica??o do m?todo proposto ?s grandes inst?ncias. A abordagem proposta apresentou melhores resultados quando comparada com a aprendizagem por refor?o cl?ssica e o m?todo guloso. Al?m de ter atingido ganhos de speedup e efici?ncia na avalia??o das m?tricas de desempenho paralelo. / A metrical task system is an abstract model for a class of online optimization problems, including paging, access lists, industry oil problems such as the management of workover rigs and logistics in the production of offshore oil, the problem of K-Servos, among others. The use of reinforcement learning to solving these problems, although proved to be efective, is restricted to a simple class of problems due to the curse of dimensionality inherent to the method. This work presents a solution that uses reinforcement learning based on hierarchical decomposition techniques and parallel computing to solve optimization problems in metric spaces. The use of these techniques allowed to extend the applicability of the method to more complex problems, bypassing the restriction of its use to smaller problems. As the size of the storage structure used by reinforcement learning to obtain the optimal policy grows as a function of the number of states and actions, which in turn is proportional to the number n of nodes and k of servers, it is noticed that their growth is given exponentially (?????(??)). To circumvent this, the problem was modeled with a multi-step decision process where we initially used the k-means algorithm as a grouping method to decompose the problem into smaller subproblems. Then, the Q-learning algorithm was applied in the subgroups, aiming at achieving the best server displacement policy. In this step, the learning and storage processes in the subgroups were executed in parallel. In this way, the problem dimension and the total execution time of the algorithm were reduced, making possible the application of the proposed method to the large instances. The proposed approach presented better results when compared to the classical reinforcement learning and the greedy method. In addition to achieving speedup and efficiency gains in the evaluation of parallel performance metrics. Keywords? Metrical Task Systems, The K-Server Problem, Curse of Dimensionality, Hierarchical Reinforcement Learning, Q-Learning Algorithm, Parallel Computing.

Le présent mémoire porte sur la poétique de la présence dans l’oeuvre d’Yves Bonnefoy. Dans la première partie de notre travail, nous montrerons en quoi cette poétique s’est élaborée en porte-à-faux avec ce que nous avons identifié comme une poétique de l’absence, théorisée par des écrivains tels que Stéphane Mallarmé, Paul Valéry et Maurice Blanchot, qui chacun à leur manière ont perçu la littérature comme une activité de négation. Dans la deuxième partie de ce travail, nous nous pencherons sur cette poétique de la présence par laquelle Bonnefoy tente de rendre présentes au sein de sa langue les choses auxquelles il fait référence, plutôt que de les faire disparaitre. Plus précisément, nous analyserons comment cette poétique se développe au sein des quatre recueils que forment ses Poèmes, son oeuvre maîtresse, par un souci que le poète accorde à la finitude et à la mort, où il tente par ses mots de s’inscrire dans un lieu, dans le passage du temps et dans un rapport à l’autre. / This thesis explores the poetics of presence in Yves Bonnefoy’s written works. A first section introduces the elaboration of this poetics, in opposition with what we have identified as a poetics of absence, as theorized by authors such as Stéphane Mallarmé, Paul Valéry and Maurice Blanchot. Each in their own way, these authors represent litterature as an activity of negation. A second section further explores Bonnefoy’s poetics of presence as a manifestation in language of things named, rather than their disappearance. More precisely, we analyze how this poetics develops in the four books that compose Bonnefoy’s Poèmes. In this major work, the poet’s poetics is illustrated by his attention to finitude and death, as verses carve his inscription in a place, in the passage of time and in a relationship to the other.

För att lyckas med ett förändringsarbete är det viktigt att fånga upp medarbetarnas upplevelse av förändringen. I leanorganisationer är förändring en kritisk och nödvändig del när det kommer till att göra bolaget mer lönsamt och konkurrenskraftigt på marknaden. Den här studien gräver djupare i hur medarbetare på de lägre hierarkiska nivåerna i en organisation upplever förändring i just lean organisationer. Forskningsområdet är motiverat av tidigare litteratur som betonar att mycket forskning inom området glömmer bort att lyfta medarbetarnas perspektiv i förmån för ledningens. I den här studien har fem medarbetare på en stor lean organisation givit sin input i semi-strukturerade intervjuer. Alla dessa representerar organisationens lägre hierarkiska nivåer. Syftet har varit att tillgodose akademin med mer empiri som ger en kvalitativ förståelse för deras upplevelse. Resultaten visar att den övergripande upplevelsen av förändringen var negativ. Majoriteten av respondenterna beklagade sig över hur förändringsarbetet hade skötts när det kom till kommunikation av visionen, att uppmuntra medarbetare att agera på visionen och att planera samt skapa kortsiktiga vinster. Utöver den kritik som framfördes mot hur ledningen hanterat dessa tre steg i Kotters 8-stegs modell för förändring, upplevde de också att det fanns ett stort gap mellan dem själva och ledningen. Något de upplevde som oerhört omotiverande. Dessa resultat bidrar inte enbart med nya insikter till litteraturen utan ger även praktiska implikationer för beslutsfattare som arbetar med förändringsledning. / A success factor when it comes to change is to pay attention to what the employees experi-ence during the process. For lean organizations, change is critical and an essential part of mak-ing the business more competitive and lucrative. This study deepens the understanding of how employees in the lower hierarchies experience a change process in a lean organization. Previous literature has justified the research field by putting an emphasis on that the employer perspective often is forgotten in relation to the management point of view. In this study, five employees from a larger lean organization has provided their input in semi-structured interviews as representatives of lower hierarchy workers. The aim was to get a qualitative understanding of their experience to provide the academic literature with a deeper understanding of their perspective on change. The results implicate that the overall experience of the change amongst these respondents was negative. The majority thought that the change has been managed poorly when it comes to communicating the vision, empowering employees to act on the vision and planning as well as creating short term wins. Also, apart from the poor management of these three steps in Kotter’s 8-step process of change, they felt like there was a huge gap between themselves and the top management which was demotivating. The findings of this study does not only provide new insights to the literature but also highlight some managerial implications for change managers.

Submitted by PPG Ci?ncia da Computa??o (ppgcc@pucrs.br) on 2018-05-08T18:37:11Z No. of bitstreams: 1 RAFAEL_CAU?_CARDOSO_TES.pdf: 14431785 bytes, checksum: 227194ed28a9e55c3ab1fbedebf06922 (MD5) / Approved for entry into archive by Caroline Xavier (caroline.xavier@pucrs.br) on 2018-05-15T19:07:36Z (GMT) No. of bitstreams: 1 RAFAEL_CAU?_CARDOSO_TES.pdf: 14431785 bytes, checksum: 227194ed28a9e55c3ab1fbedebf06922 (MD5) / Made available in DSpace on 2018-05-15T19:14:18Z (GMT). No. of bitstreams: 1 RAFAEL_CAU?_CARDOSO_TES.pdf: 14431785 bytes, checksum: 227194ed28a9e55c3ab1fbedebf06922 (MD5) Previous issue date: 2018-03-27 / Sistemas multiagentes freq?entemente cont?m ambientes complexos e din?micos, nos quais os planos dos agentes podem falhar a qualquer momento durante a execu??o do sistema. Al?m disso, novos objetivos podem aparecer para os quais n?o existem nenhum plano dispon?vel. T?cnicas de planejamento s?o bem adequadas para lidar com esses problemas. H? uma quantidade extensa de pesquisa em planejamento centralizado para um ?nico agente, por?m, at? ent?o planejamento multiagente n?o foi completamente explorado na pr?tica. Plataformas multiagentes tipicamente proporcionam diversos mecanismos para coordena??o em tempo de execu??o, frequentemente necess?rios em planejamento online. Neste contexto, planejamento multiagente descentralizado pode ser eficiente e eficaz, especialmente em dom?nios fracamente acoplados, al?m de garantir algumas propriedades importantes em sistemas de agentes como privacidade e autonomia. N?s abordamos esse problema ao apresentar uma t?cnica para planejamento multiagente online que combina aloca??o de objetivos, planejamento individual utilizando rede de tarefas hier?rquicas (HTN), e coordena??o em tempo de execu??o para apoiar a realiza??o de objetivos sociais em sistemas multiagentes. Especificamente, n?s apresentamos um framework chamado Decentralised Online Multi-Agent Planning (DOMAP). Experimentos com tr?s dom?nios fracamente acoplados demonstram que DOMAP supera quatro planejadores multiagente do estado da arte com respeito a tempo de planejamento e tempo de execu??o, particularmente nos problemas mais dif?ceis. / Multi-agent systems often contain dynamic and complex environments where agents? course of action (plans) can fail at any moment during execution of the system. Furthermore, new goals can emerge for which there are no known plan available in any of the agents? plan library. Automated planning techniques are well suited to tackle both of these issues. Extensive research has been done in centralised planning for singleagents, however, so far multi-agent planning has not been fully explored in practice. Multi-agent platforms typically provide various mechanisms for runtime coordination, which are often required in online planning (i.e., planning during runtime). In this context, decentralised multi-agent planning can be efficient as well as effective, especially in loosely-coupled domains, besides also ensuring important properties in agent systems such as privacy and autonomy. We address this issue by putting forward an approach to online multi-agent planning that combines goal allocation, individual Hierarchical Task Network (HTN) planning, and coordination during runtime in order to support the achievement of social goals in multi-agent systems. In particular, we present a planning and execution framework called Decentralised Online Multi-Agent Planning (DOMAP). Experiments with three loosely-coupled planning domains show that DOMAP outperforms four other state-of-the-art multi agent planners with regards to both planning and execution time, particularly in the most difficult problems.

Made available in DSpace on 2014-12-17T15:42:03Z (GMT). No. of bitstreams: 1 MariaFPV.pdf: 6083202 bytes, checksum: 8b9199df5753800b615ab0a90bae3e8e (MD5) Previous issue date: 2007-12-10 / Heavy metals can cause problems of human poisoning by ingestion of contaminated food, and the environment, a negative impact on the aquatic fauna and flora. And for the presence of these metals have been used for aquatic animals biomonitoramento environment. This research was done in order to assess the environmental impact of industrial and domestic sewage dumped in estuaries potiguares, from measures of heavy metals in mullet. The methods used for these determinations are those in the literature for analysis of food and water. Collections were 20 samples of mullet in several municipality of the state of Rio Grande do Norte, from the estuaries potiguares. Were analyzed the content of humidity, ash and heavy metals. The data were subjected to two methods of exploratory analysis: analysis of the main components (PCA), which provided a multivariate interpretation, showing that the samples are grouped according to similarities in the levels of metals and analysis of hierarchical groupings (HCA), producing similar results. These tests have proved useful for the treatment of the data producing information that would hardly viewed directly in the matrix of data. The analysis of the results shows the high levels of metallic species in samples Mugil brasiliensis collected in Estuaries /Potengi, Piranhas/A?u, Guara?ra / Papeba / Ar?s and Curimata? / Os metais pesados podem provocar problemas de intoxica??o humana pela ingest?o de alimentos contaminados e para o meio ambiente, uma repercuss?o negativa ? fauna e flora aqu?ticas. E para detectar a presen?a destes metais t?m-se utilizado animais aqu?ticos para o biomonitoramento ambiental. Esta pesquisa foi feita com o intuito de se avaliar o impacto ambiental de esgotos dom?sticos e industriais despejados nos estu?rios potiguares, a partir das medidas de metais pesados em tainha. Os m?todos utilizados para estas determina??es s?o aqueles constantes da literatura para an?lise de alimentos e de ?gua. Foram coletas 20 amostras de tainha em diversos munic?pios do Estado do Rio Grande do Norte, oriundas dos estu?rios potiguares. Foram analisados os teores de umidade, cinzas e metais pesados. Os dados foram submetidos a dois m?todos de an?lises explorat?rios: an?lise de componentes principais (PCA), que proporcionou uma interpreta??o multivariada, mostrando que as amostras s?o agrupadas de acordo com as similaridades de teores de metais e an?lise hier?rquica de agrupamentos (HCA), produzindo resultados semelhantes. Estas an?lises mostraram-se ?teis para o tratamento dos dados produzindo informa??es que dificilmente seriam visualizados diretamente na matriz de dados. A an?lise dos resultados mostra os altos teores de esp?cies met?licas em amostras coletadas em tainhas nos Estu?rios Potengi, Piranhas/A?u, Guara?ra/Papeba/Ares e Curimata?

Made available in DSpace on 2014-12-17T15:14:51Z (GMT). No. of bitstreams: 1 RobertoTGO_DISSERT.pdf: 394069 bytes, checksum: fbb8faf7e24cc92335302e442b92ec43 (MD5) Previous issue date: 2010-02-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / In this work we study the phase transitions of the ferromagnetic three-color Ashkin-Teller Model in the hierarquical lattice generated by the Wheatstone bridge using real space renormalization group approach. With such technique we obtain the phase diagram and its critical points with respective critical exponents v. This model presents four phases: ferromagnetic, paramagnetic and two intermediates. Nine critical points were found, three of which are of Ising model type, three are of four states Potts model type, one is of eight states Potts model type and the last two which do not correspond to any Potts model with integer number of states. iv / Neste trabalho estudamos as transi??es de fase do modelo de Ashkin-Teller de tr?s cores ferromagn?tico na rede hier?rquica ponte de Wheatstone utilizando o m?todo de grupo de renormaliza??o no espa?o real. Com a utiliza??o desta t?cnica obtemos o diagrama de fases e seus pontos cr?ıticos com respectivos expoentes cr?ticos v. O modelo apresenta quatro fases: ferromagn?tica, paramagn?tica e duas intermedi?rias. Nove pontos cr?ıticos foram encontrados, sendo tr?s de classe de universalidade Ising, tr?s Potts de quatro estados, um Potts de oito estados e dois com classe de universalidade n?o correspondente a nenhum Potts com n?mero inteiro de estados

MARTINA SUMICHRASTOVA 10.5.18 The Fading Face of the Chinese Dragon? The Dispute Over the Senkaku/Diaoyu Islands ABSTRACT Keywords: the Senkaku/Diaoyu Islands, China vs Japan, The face of nation, two level game theory, Chinese Dream The emergence of the global-economic crisis of 2008 helped the People's Republic of China to acquire the status of the world's second-largest economy. Not only did it open the doors for more significant opportunities for China in the sphere of commerce, but it allowed the People's Republic of China to be seen differently in the matters of military, diplomacy as well as on their level of domestic politics. This thesis aims to provide an insight into a smouldering territorial dispute over the Senkaku/ Diaoyu Islands concerning the deeply enrooted concept of the face. The concept of the face is essential mainly for Confucian societies as well as the East- Asian societies. However, slipping of the Chinese Dream, the People's Republic of China seems to be challenged in socio-political terms. Is the face of Chinese Dragon fading away? As it is well known, both sides involved in the conflict, China, and Japan have had a turbulent history of disputes and quarrels. What makes the Chinese Officials to get involved in the territorial dispute, to strengthen the face of Chinese Dragon? The...

In my master thesis I analyze the influence of Taiwan's democratization on Cross- Strait relations. The thesis is structurally divided into three main periods: the pre- democratization period, democratization period and the period since the first power alternation in Taiwan. The first chapter analyzes the emergence of the Cross-Strait issue, the period of the Japanese colonization, the Post-Second World War Period, the Chinese Civil War and Cold War period until second half 80s. It points out the main external and internal factors, which influenced the Cross- Strait relations development and also the development of both Chinese states. The subject of the second chapter is the Taiwan's democratization and its internal and external leverage. Based on A. Przeworski's Theory of Games I am comparing the Taiwan's democratization to the Tiananmen incident. At the end of the second chapter I am comparing political system and regime of both Chinese states and I am pointing out salience of Taiwan for China. The final chapter examines the period of the first power alternation in Taiwan and how it influenced the Cross- Strait relations. It analyzes the issue of Taiwanese identity and sovereignty. It points out the three most common sovereignty interpretations over Taiwan. This chapter also entails an analysis...