The impact of the 2008 and 2010 financial crises on international stock markets : contagion and long memory

Nesta tese estudamos os efeitos de cont��gio financeiro e de mem��ria longa causados pelas crises financeiras de 2008 e 2010 em alguns mercados acionistas internacionais. A tese �� composta por tr��s ensaios interligados. No Ensaio 1, recorremos �� teoria das c��pulas para testar a exist��ncia de cont��gio e revelar os canais ���investor induced��� de transmiss��o da crise de 2008 aos mercados da B��lgica, Fran��a, Holanda e Portugal (grupo NYSE Euronext). Conclu��mos que existe cont��gio nestes mercados, que o canal ���portfolio rebalancing��� �� o mecanismo mais importante de transmiss��o da crise, e que o fen��meno ���flight to quality��� est�� presente nos mercados. No Ensaio 2, usando novamente modelos de c��pulas, avaliamos os efeitos de cont��gio provocados pelo mercado acionista grego nos mercados do grupo NYSE Euronext, no contexto da crise de 2010. Os resultados obtidos sugerem que durante a crise de 2010 apenas o mercado portugu��s foi objeto de cont��gio; al��m disso, conclui-se que os efeitos de cont��gio provocados pela crise de 2008 s��o claramente superiores aos efeitos provocados pela crise de 2010. No Ensaio 3, abordamos o tema da mem��ria longa atrav��s do estudo do expoente de Hurst dos mercados acionistas da B��lgica, E.U.A., Fran��a, Gr��cia, Holanda, Jap��o, Reino Unido e Portugal. Verificamos que as propriedades de mem��ria longa dos mercados foram afetadas pelas crises, especialmente a de 2008 ��� que aumentou a mem��ria longa dos mercados e tornou-os mais persistentes. Finalmente, usando c��pulas mais uma vez, verificamos que as crises provocaram, em geral, um aumento na correla����o entre os expoentes de Hurst locais dos mercados foco das crises (E.U.A. e Gr��cia) e os expoentes de Hurst locais dos outros mercados da amostra, sugerindo que o expoente de Hurst pode ser utilizado para detetar efeitos de cont��gio financeiro. Em s��ntese, os resultados desta tese sugerem que comparativamente com per��odos de acalmia, os per��odos de crises financeiras tendem a provocar inefici��ncia nos mercados acionistas e a conduzi-los na dire����o da persist��ncia e do cont��gio financeiro.

Beyond methodological nationalism: The contribution of Robert E. Park to the history of intercultural communication

The legacy of nineteenth century social theory followed a ���nationalist��� model of society, assuming that analysis of social realities depends upon national boundaries, taking the nation-state as the primary unit of analysis, and developing the concept of methodological nationalism. This perspective regarded the nation-state as the natural - and even necessary - form of society in modernity. Thus, the constitution of large cities, at the end of the 19th century, through the intense flows of immigrants coming from diverse political and linguistic communities posed an enormous challenge to all social research. One of the most significant studies responding to this set of issues was The Immigrant Press and its Control, by Robert E. Park, one of the most prominent American sociologists of the first half of the 20th century. The Immigrant Press and its Control was part of a larger project entitled Americanization Studies: The Acculturation of Immigrant Group into American Society, funded by the Carnagie Corporation following World War I, taking as its goal to study the so-called ���Americanization methods��� during the 1920s. This paper revisits that particular work by Park to reveal how his detailed analysis of the role of the immigrant press overcame the limitations of methodological nationalism. By granting importance to language as a tool uniting each community and by showing how the strength of foreign languages expressed itself through the immigrant press, Park demonstrated that the latter produces a more ambivalent phenomenon than simply the assimilation of immigrants. On the one hand, the immigrant press served as a connecting force, driven by the desire to preserve the mother tongue and culture while at the same time awakening national sentiments that had, until then, remained diffuse. Yet, on the other hand, it facilitated the adjustment of immigrants to the American context. As a result, Park���s work contributes to our understanding of a particular liminal moment inherent within many intercultural contexts, the space between emigrant identity (emphasizing the country of origin) and immigrant identity (emphasizing the newly adopted country). His focus on the role played by media in the socialization of immigrant groups presaged later work on this subject by communication scholars. Focusing attention on Park���s research leads to other studies of the immigrant experience from the same period (e.g., Thomas & Znaniecki, The Polish Peasant in Europe and America), and also to insights on multi-presence and interculturality as significant but often overlooked phenomena in the study of immigrant socialization.

Estudo sobre a mem��ria longa na volatilidade dos pre��os do ouro : uma abordagem com base nos modelos de tipo ARCH

Mestrado em Contabilidade e An��lise Financeira

Optimizing memory transactions for large-scale programs

Even though Software Transactional Memory (STM) is one of the most promising approaches to simplify concurrent programming, current STM implementations incur significant overheads that render them impractical for many real-sized programs. The key insight of this work is that we do not need to use the same costly barriers for all the memory managed by a real-sized application, if only a small fraction of the memory is under contention lightweight barriers may be used in this case. In this work, we propose a new solution based on an approach of adaptive object metadata (AOM) to promote the use of a fast path to access objects that are not under contention. We show that this approach is able to make the performance of an STM competitive with the best fine-grained lock-based approaches in some of the more challenging benchmarks. (C) 2015 Elsevier Inc. All rights reserved.

On the moroccan tsunami catalogue

A primary tool for regional tsunami hazard assessment is a reliable historical and instrumental catalogue of events. Morocco by its geographical situation, with two marine sides, stretching along the Atlantic coast to the west and along the Mediterranean coast to the north, is the country of Western Africa most exposed to the risk of tsunamis. Previous information on tsunami events affecting Morocco are included in the Iberian and/or the Mediterranean lists of tsunami events, as it is the case of the European GITEC Tsunami Catalogue, but there is a need to organize this information in a dataset and to assess the likelihood of claimed historical tsunamis in Morocco. Due to the fact that Moroccan sources are scarce, this compilation rely on historical documentation from neighbouring countries (Portugal and Spain) and so the compatibility between the new tsunami catalogue presented here and those that correspond to the same source areas is also discussed.

Relat��rio de est��gio: mestrado em ensino da m��sica

Resumo I (Pr��tica Pedag��gica)- Este Relat��rio de Est��gio �� composto por duas sec����es. Na primeira descreve-se o est��gio realizado pela mestranda, na Classe de Flauta do Professor Jo��o Pereira Coutinho (JPC), na Escola de M��sica do Conservat��rio Nacional (EMCN), ao longo do ano lectivo de 2012/2013, com a supervis��o do Professor Nuno Ivo Cruz. Ap��s uma contextualiza����o da EMCN e dos alunos acompanhados no est��gio, descreve-se o desempenho de cada um deles, ao longo do ano lectivo, bem como as pr��ticas educativas desenvolvidas pelo Professor Cooperante, nas aulas assistidas, e as desenvolvidas pela estagi��ria. Realiza-se uma reflex��o sobre as mesmas,apresentando, tamb��m, algumas vantagens e desvantagens relativamente ao modelo de Est��gio proposto.

Os factores influenciadores do consumo de produtos nacionais em Portugal

Disserta����o apresentada �� Escola Superior de Comunica����o Social como parte dos requisitos para obten����o de grau de mestre em Publicidade e Marketing.