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NDLTD Union Catalog (1.532.874 recursos)

The NDLTD Union Catalog is an OAICat server containing thesis and dissertation records harvested from registered NDLTD OAI repositories

National Library of Portugal DiTeD ETD Repository

Mostrando recursos 1 - 20 de 222

  1. A relação entre perdas e valor no contexto de um sector emergente-o caso das empresas americanas

    Gama, Ana Paula Bernardino Matias
    The purpose of this research is to analyse the positive loss-earnings relation in the context of U.S. net firms. This topic earns special relevance with the emergence of the Internet sector. We focus on the period between 1996 and 2003. In order to identify the net firms, we collected information from ISDEX – Internet Stock List. With the goal to control the survivor bias effect, we obtain information about net firms from the Morgan & Stanley reports. We also selected a match sample (non net firms) from NASDAQ, with close IPO dates to those of the net firms. We assume that the negative...

  2. Educação superior no período noturno-impacto do entorno educacional no cotidiano

    Terribili Filho, Armando, 1955-
    The conduct of university courses at night in Brazil is significant, where this scheduling option is used by more that 60% of undergraduate students. In order to discuss if the surrounding education (issues in the areas of transportation, traffic, public safety and labor law) affects the student day-by-day and can influences the student’s physical and psychological state upon arrival for their studies, it was developed a quantitative and qualitative research conducted with 340 students who attend night classes at three private institutions located in São Paulo State (one in São Paulo city, other institution in a city placed in Campinas...

  3. Musealização do sagrado-práticas museológicas em torno de objectos do culto católico

    Roque, Maria Isabel Rocha, 1961-
    This study tries to analyse the sacred references in the museums: how can the immaterial thought and religious felling be expressed in the museum context and how are the liturgical or devotional objects referred in a museological exhibition? We approach this theme taking as a reference our reality, focusing on the objects of the catholic cult in Portuguese museums. The investigation involves an historical study and a case study methodology, both of them based on the analysis methods of art history and sociology. We also consider an interdisciplinary approach to analyse this theme through its features in art, history, museology and...

  4. Métodos Formais para o Estudo de Protocolos de Segurança

    Adão, Pedro Miguel dos Santos Alves Madeira, 1980-
    Várias abordagens têm sido propostas nos últimos anos para o estudo de problemas de Criptografia. Visto que o modelo da Criptografia Computacional é bastante complexo e por isso bastante difícil de utilizar, várias abstracções têm sido propostas nos últimos anos sendo a mais bem sucedida a proposta por Dolev-Yao. No entanto, apesar desta abstracção facilitar o tratamento dos problemas, é necessário verificar se estas abstracções são correctas, i.e., se os protocolos cuja correcção foi provada, segundo estas abstracções, são correctos aquando da sua implementação. Nesta dissertação, começamos por considerar a lógica de indistinguibilidade proposta por Abadi e Rogaway e mostraremos que...

  5. Distributed learning environments in the design and development of the flexible university

    Cardoso, Eduardo Luís
    Distributed learning environments (DLE), based in e-learning plataforms (eLP), have been presented with the potential to foster innovation and development in the teaching activitiy, at higher education institutions (HEI). However, changes within the teaching and learning processes, due to information and communication technologies (ICT), have showed to be limited and with a weak evolution rate. The present research work studied the phenomenon of eLP adoption in HEI to support DLE, building understanding about the process of adoption and use of technology and how it is influenced, and how it influence, by the context where it take place. The main goals of...

  6. A construção do Estado Liberal-elite política e burocracia na "Regeneração" (1851-1890)

    Almeida, Pedro Tavares de, 1956-

  7. Abordagem neuropsicológica e imagiológica da disfunção cerebral da toxicodependência

    Vultos, Joaquim Manuel de Almeida dos

  8. A acumulação do capital no Brasil-expansão e crise

    Ribeiro, Nelson R.

  9. A "Guiné do Cabo Verde"-produção textual e representações (1578-1684)

    Horta, José da Silva, 1961-

  10. O rosto e o espelho-a sociedade lisboeta e o teatro romântico (1838-1870) : poliedro sociocomunicativo

    Dias, José Henrique Rodrigues

  11. Construção, aplicação e demonstração da eficácia de um programa de dança tradicional portuguesa para idosos

    Pereira, Maria Isabel Varregoso Rebetim

  12. Os centros históricos numa estratégia de conservação integrada-contributos para o estudo do processo urbano recente do centro histórico de Évora

    Boavida-Portugal, Luis Manuel Gomes

  13. Angra do Heroísmo-arquitectura do século XX e memória colectiva

    Gouveia, Paulo Duarte de Melo

  14. Letter to Raul Lino-Cultural identity in Portuguese architecture : the "inquérito" and the architecture of its protagonists in the 1960's

    Ollero, Rodrigo

  15. Dança e género na escola-formas de ser e viver mediadas pela educação estética

    Kunz, Maria do Carmo Saraiva

  16. Cristalização de Biomateriais Vitrocerâmicos e Mineralização em Meio Fisiológico Simulado

    Queiroz, Carlos Manuel Gomes de Araújo
    We propose new theoretical models, which generalize the classical Avrami-Nakamura models. These models are suitable to describe the kinetics of nucleation and growth in transient regime, and/or with overlapping of nucleation and growth. Simulations and predictions were performed for lithium disilicate based on data reported in the literature. One re-examined the limitations of the models currently used to interpret DTA or DSC results, and to extract the relevant kinetic parameters. Glasses and glass-ceramics with molar formulation 0.45SiO2? (0.45-x)MgO?xK2O?0.1(3CaO.P2O5) (0?x?0.090) were prepared, crystallized and studied as potential materials for biomedical applications. Substitution of K+ for Mg2+ were used to prevent devritification...

  17. A princesinha branca e esbelta e o dragão negro e rotundo-um estudo de história do património de Lisboa, 1888 - anos 50

    Ramos, Paulo Oliveira, 1951-

  18. Relação entre a performance na maratona e parâmetros internos e externos da carga

    Paiva, Mário Casimiro da Anunciação

  19. A ideia não tem fim-para uma filosofia da história de arte em Francisco de Holanda

    Teixeira, António Moreira

  20. Actividade física e qualidade de vida de mulheres idosas

    Mazo, Giovana Zarpellon

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