Typescript (photocopy). / Digitized by Kansas Correctional Industries

Photocopy of typescript. / Digitized by Kansas Correctional Industries

As bibliotecas digitais encerram sistemas extremamente complexos de informação, que dão suporte à criação, gestão, distribuição e preservação de fontes de informação. Apesar de atividade reconhecidamente importante, ao menos na teoria, a avaliação de bibliotecas digitais ainda aparece como atividade pouco executável e desassociada do planejamento de projetos de bibliotecas digitais. Buscamos neste trabalho apresentar alguns dos modelos, das técnicas e das metodologias, especificamente a abordagem de Saracevic, que vêm sendo aplicadas, com resultados positivos e passíveis de replicação em ambientes similares. A questão da falta de cultura de avaliação em bibliotecas digitais é também outro aspecto abordado nesta tese. O principal objetivo da pesquisa é demonstrar os aspectos e os resultados positivos da avaliação de bibliotecas digitais, bem como chamar a atenção para a necessidade de uma conscientização por parte de gestores e profissionais envolvidos com o tema, quanto à importância de propiciar um ambiente favorável à execução de atividades de avaliação. / Digital libraries are extremely complex information systems, which support the creation, management and preservation of information resources. Although recognized as important, at least in theory, digital library evaluation is not common and is not generally associated with digital library projects planning. In this research, we have tried to present some of the models, techniques, and methodologies available in literature, specifically Saracevics approach, that have been applied, with positive results, and can be applied for benchmarking in similar environments. Also, the problem of lack of culture of assessment in digital libraries is another topic of this thesis. The main goal of this research is showing the positive aspects and results of digital library evaluation, as well as to demonstrate to managers and professionals involved with the subject the importance of providing a favourable environment for evaluation activities.

No intuito de transformar sistemas de angiografia convencionais em sistemas de subtração digital com angiografia foram implementados três métodos de subtração digital: subtração digital por complemento de um, subtração por comparação 1 e subtração digital por comparação 2 e dois métodos de processamento: \"threshold\" e equalização para aplicação em sistemas angiográficos (DSA). O estudo destes métodos foi realizado com a simulação em sistemas gráficos a partir do qual foram avaliados o realce das pequenas estruturas vasculares, a influência do ruído e a velocidade de operação na subtração das imagens. Os algoritmos desenvolvidos em linguagem Pascal, utilizando Borland Delphi 2.0 (32 bits) foram testados com imagens obtidas no Hospital das Clínicas de Ribeirão Preto e os resultados foram comparados por análise visual. / In the intention of transforming systems of conventional angiography in systems of digital subtraction with angiography three methods of digital subtraction were implemented, digital subtraction for complement of a, subtraction for comparison 1 and digital subtraction for comparison 2 two processing methods: threshold and equalize for application in systems angiographycs (DSA). The study of these methods was accomplished with the simulation in graphic systems statting from which were appraised it enhances it of the small vascular structures, the influence of the noise and the operation speed in the subtraction of the images. The algorithms developed in linguage Pascal, using Borland Delphi 2.0 (32 bits) they were tested with images obtained in the Hospital of the Clinics in Ribeirão Preto and the results were compared by visual analysis.

Estágio realizado no INESC e orientado pelo Eng.º Pedro Miguel Carvalho / Tese de mestrado integrado. Engenharia Electrotécnica e de Computadores (Major Telecomunicações). Faculdade de Engenharia. Universidade do Porto. 2009

Hoy en día, diversas empresas de turismo buscan la forma de diferenciarse entre ellas, desarrollan todo tipo de estrategias que les permitan atraer a más clientes y fidelizarlos. En el mercado, ya son varias empresas que optaron por ser digitales debido a su público objetivo y la época en la que vivimos, pero son pocas las que brindan además de un servicio digital, un servicio que se adapte las necesidades o deseos del cliente. Por dicha razón, en el presente trabajo se eligió desarrollar una plataforma digital que brinde a los turistas un servicio 100% personalizado. Dado el boom del turismo en el Perú y la pasión de cada uno de nosotros por viajar se eligió crear Friends & Travel, una empresa que busca conectar a viajeros de todo el mundo con personas que los ayuden o asesoren con la planificación de su viaje para conocer mejor su destino y vivir una experiencia única y diferente. Los resultados de este trabajo demuestran como el turismo es una importante fuente de desarrollo en nuestro país por lo que crear nuevos modelos de negocio en el sector debe ser exitoso. Las tradicionales agencias de turismo o plataformas digitales internacionales como Booking o Trip Advisor no deben ser las únicas empresas que brindan la información necesaria a cada turista, deben exitir otros medios con un trato personalizado que los ayude a programar sus aventuras y viajes. / Today, various tourism companies seek to differentiate between them, develop all kinds of strategies that allow them to attract more customers and build loyalty. In this market, there are already several companies that chose to be digital due to their target audience and the time in which we live, but few provide a digital service, a service that suits the needs or wishes of the client. For this reason, in this work we chose to develop a digital platform that provides tourists with a 100% personalized service. Given the tourism boom in Peru and the passion of each one of us to travel, we chose to create Friends & Travel, a company that wants to connect travelers from all over the world with people who can help or advise them with the planning of their trip to Know their destination better and live a unique and different experience. The results of this work demonstrate how tourism is an important source of development in our country, so creating new business models in the sector must be successful. Traditional tourism agencies or international digital platform such as Booking or TripAdvisor should not be the only companies that provide the necessary information to each tourist, there must be other means with a personalized service that helps them to program their adventures and trips. / Trabajo de investigación

<p>Denne hovedfagsoppgaven tar sikte på å vise at digitale bibliotek kan publisere intellektuelle arbeider i Internet i overenstemmelse med opphavsretten. Den foreslår en arkitektur/et paradigme for å behandle rettigheter ved publikasjon gjennom Digitale Bibliotek som innebærer digital rettighetshåndtering. Gjennom en analyse av opphavsrettslovgivning og internasjonale avtaler, digitale biblioteks behov og standarder og system for digitale rettighetshåndtering under utvikling fastlegges premissene for en slik arkitektur. Basert på denne analysen foreslås en arkitektur/paradigme for et system for digital rettighetsbehandling for digitale bibliotek. Som del av</p><p>denne oppgaven har det blitt implementert en prototype av et slikt system,og dette systemet er dokumentert i denne oppgaven.</p> / <p>This master thesis is aimed at demonstrating that intellectual property can be published in the Internet by digital libraries in accordance with copyright laws. It proposes an architecture/paradigm for managing rights when publishing information through Digital Libraries involving digital rights management. Through an analysis of copyright laws and international treaties, the needs of Digital Libraries and evolving standards and systems for Digital Rights Management the foundations for a such an architecture are identified. Based on this analysis an architecture/paradigm for a system for digital rights management in digital libraries is proposed. As part of this work a prototype of such a system has been implemented and is documented in this paper.</p>

Denne hovedfagsoppgaven tar sikte på å vise at digitale bibliotek kan publisere intellektuelle arbeider i Internet i overenstemmelse med opphavsretten. Den foreslår en arkitektur/et paradigme for å behandle rettigheter ved publikasjon gjennom Digitale Bibliotek som innebærer digital rettighetshåndtering. Gjennom en analyse av opphavsrettslovgivning og internasjonale avtaler, digitale biblioteks behov og standarder og system for digitale rettighetshåndtering under utvikling fastlegges premissene for en slik arkitektur. Basert på denne analysen foreslås en arkitektur/paradigme for et system for digital rettighetsbehandling for digitale bibliotek. Som del av denne oppgaven har det blitt implementert en prototype av et slikt system,og dette systemet er dokumentert i denne oppgaven. / This master thesis is aimed at demonstrating that intellectual property can be published in the Internet by digital libraries in accordance with copyright laws. It proposes an architecture/paradigm for managing rights when publishing information through Digital Libraries involving digital rights management. Through an analysis of copyright laws and international treaties, the needs of Digital Libraries and evolving standards and systems for Digital Rights Management the foundations for a such an architecture are identified. Based on this analysis an architecture/paradigm for a system for digital rights management in digital libraries is proposed. As part of this work a prototype of such a system has been implemented and is documented in this paper.

Graduation date: 1991

Digital watermarking is one of the most popular technologies for protecting the ownerships of digital contents or products. By embedding digital watermarks into digital contents, the owners of the contents can convince the judge or the trusted third party of their ownership of the contents. However, some attacks, such as the binding attacks and the men-in-the-middle attacks, are threatening the security of the watermarking mechanisms. Moreover, that the privacy of content buyers is not fully protected or the dispute between the buyers and the sellers cannot be fairly resolved also reduce the quality of the services. Although several buyer-seller watermarking protocols have been introduced in the literature, none can cope with all of the above problems. In this thesis, we will propose a novel buyer-seller watermarking protocol that can resolve the dispute between the buyers and the sellers fairly. Furthermore, not only is the proposed protocol immune to all of the known attacks, but it is truly buyer anonymous as well.