Digital communication produces millions of emails, text messages, movies, images, and much more every day. As with all historical records, digital records are important to preserve because they allow us to study the past. There are, however, several challenges regarding their preservation. Unlike many of their analogue counterparts, digital records rely on a combination of hardware and software to be accessible, but hardware and software eventually degrade and become obsolete. This makes digital records inaccessible because the means to render them are no longer available. In addition to these technological challenges, there are issues surrounding appraisal, copyright, significant properties, and metadata. This thesis studies the challenges of digital preservation and what is being done to address them. I begin by introducing the challenges surrounding this topic and the methods of preservation that are currently available to archivists. I then analyse leading digital preservation standards such as the Reference Model for an Open Archival Information System (OAIS) and Preservation Metadata: Implementation Strategies (PREMIS) as well as digital preservation systems including Archivematica and Preservica. I also conduct a case study of Archivematica to analyse how well it manages the challenges of digital preservation. I conclude by explaining that there are no perfect solutions to digital preservation problems. The best that can currently be done is to manage the issues rather than solve them. / February 2017

Automatic publication of data and metadata for map and catalogue systems from raster sources in PostgreSQL Abstract The main goal of the presented work is the design and implementation of the application for the automatic publication of the raster data and metadata from the PostgreSQL database to the map and catalog services. The application should exclusively utilize the open source software and technologies. The fundamental component of the developed application is the PostgreSQL database with the PostGIS and PostGIS raster extensions. The presented work evaluates the possibilities of the raster storage from different points of view -e.g. the suitability for the further data processing or the publication of the raster data. The most suitable structure for raster storage is then proposed with respect to analytical and publication usage of the stored data. The possibilities of the open source software for the solution and implementation of the presented problem are then inspected. The GeoNetwork and GeoServer are utilized as a metadata and map server solution. The results of the deployment of these technologies is then evaluated for the real world data and compared with other available related solutions. Keywords: PostGIS, PostGIS raster, GeoServer, GeoNetwork opensource, metadata, web map services, OGC,...

The aim of this thesis is to develop a gamified crowdsourcing platform for transcription and metadata tagging of digitised text documents, and further to examine whether the platform can stimulate engagement in archives and be used as an educational resource. The case, around which the thesis project is conducted, is the governmental Archives of Bosnia and Herzegovina and its historical documents which were damaged in a fire in 2014.  Theories about engagement, archival pedagogy, and gamification guided the development of the platform. Bosnian-Herzegovinian school children, History teachers, and staff of the Archives of Bosnia and Herzegovina tested the platform and shared their thoughts of it in focus group discussions and interviews. The developed platform consists of a game interface, a database, and an interface for results viewing and searching. It is web-based, and coded in HTML, CSS, JavaScript, and PHP. The platform stimulated engagement among the school children who tested it. They expressed interest in reading and learning more about archival documents, in long-term preservation of information, and in the archive’s mission and future. Judging from the discussions and interviews, the platform could well serve as an educational resource. The History teachers showed interest in using the platform in their teaching, and found support for it in the curriculum for the History subject. A gamified crowdsourcing platform has been developed, and the perception among school children, History teachers, and archive staff was overall very positive. Crowdsourcing is not just about sourcing out tasks to the crowd. Co-creation of content could furthermore stimulate learning and engagement, and thereby tie a bound between the public and the archive. Gamification can successfully make the overarching goal of crowdsourcing understandable and concrete for the platform users. / Uppsatsen syftar till att utveckla en spelifierad crowdsourcing-plattform för transkription och metadatataggning av digitaliserade textdokument samt att undersöka huruvida plattformen kan väcka engagemang för arkiv och användas som en utbildningsresurs. Det fall runt vilket uppsatsprojektet kretsar är Bosnien-Hercegovinas centrala arkivmyndighet och dess historiska dokument som skadades i en brand 2014. Teorier om engagemang, arkivpedagogik och gamification vägledde utvecklingen av plattformen. Skolbarn och historielärare i Bosnien-Hercegovina samt personal på arkivmyndigheten provade plattformen och delade med sig av sina tankar om den i fokusgruppsdiskussioner och intervjuer. Den utvecklade plattformen består av ett spelgränssnitt, en databas och ett gränssnitt för resultatvisning och sökning. Den är webbaserad och skriven i HTML, CSS, JavaScript och PHP. Plattformen väckte engagemang hos de barn som provade den. De uttryckte intresse av att läsa och lära sig mer om arkivdokument, av långsiktigt bevarande samt av arkivets uppdrag och framtid. Plattformen skulle, av fokusgruppsdiskussionerna och intervjuerna att döma, kunna användas och fungera väl som utbildningsresurs. Historielärarna visade intresse av att använda plattformen i sin undervisning och fann stöd för det i historieämnets läroplan. En spelifierad crowdsourcing-plattform har utvecklats och mottagandet av den bland skolbarn, historielärare och arkivpersonal var överlag mycket positivt. Crowdsourcing handlar inte enbart om att outsourca arbetsuppgifter till massan. Medskapande kan dessutom stimulera lärande och engagemang och därigenom knyta band mellan allmänheten och arkivet. Spelifiering kan med framgång göra crowdsourcingens övergripande mål förståeligt och konkret för dem som använder plattformen.

Today’s increasing information supply raises the needfor more effective and automated information processing whereindividual information adaptation (personalization) is onepossible solution. Earlier computer systems for personalizationlacked the ability to easily define and measure theeffectiveness of personalization efforts. Numerous projectsfailed to live up to the their expectations, and the demand forevaluation increased. This thesis presents some underlying concepts and methodsfor implementing personalization in order to increase statedbusiness objectives. A personalization system was developedthat utilizes descriptions of information characteristics(metadata) to perform content based filtering in anon-intrusive way. Most of the described measurement methods forpersonalization in the literature are focused on improving theutility for the customer. The evaluation function of thepersonalization system described in this thesis takes thebusiness operator’s standpoint and pragmatically focuseson one or a few measurable business objectives. In order toverify operation of the personalization system, a functioncalled bifurcation was created. The bifurcation functiondivides the customers stochastically into two or morecontrolled groups with different personalizationconfigurations. Bygiving one of the controlled groups apersonalization configuration that deactivates thepersonalization, a reference group is created. The referencegroup is used to measure quantitatively objectives bycomparison with the groups with active personalization. Two different companies had their websites personalized andevaluated: one of Sweden’s largest recruitment servicesand the second largest Swedish daily newspaper. The purposewith the implementations was to define, measure, and increasethe business objectives. The results of the two case studiesshow that under propitious conditions, personalization can bemade to increase stated business objectives. Keywords:metadata, semantic web, personalization,information adaptation, one-to-one marketing, evaluation,optimization, personification, customization,individualization, internet, content filtering, automation. / <p>QCR 20161027</p>

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With social media rising in popularity over the recent years, new so called social bots are infiltrating by spamming and manipulating people all over the world. Many different methods have been presented to solve this problem with varying success. This study aims to compare some of these methods, on a dataset of Twitter account metadata, to provide helpful information to companies when deciding how to solve this problem. Two machine learning algorithms and a human survey will be compared on the ability to classify accounts. The algorithms used are the supervised algorithm random forest and the unsupervised algorithm k-means. There will also be an evaluation of two ways to run these algorithms, using the machine learning as a service BigML and the python library Scikit-learn. Additionally, what metadata features are most valuable in the supervised and human survey will be compared. Results show that supervised machine learning is the superior technique for social bot identification with an accuracy of almost 99%. To conclude, it depends on the expertise of the company and if a relevant training dataset is available but in most cases supervised machine learning is recommended.

Esse trabalho apresenta uma proposta de Infraestrutura de Dados Espaciais de nível organizacional para o Parque Estadual de Intervales-SP, que visa compartilhar suas informações geográficas com a sociedade em geral. Nos processos de elaboração da IDE são discutidas questões como interoperabilidade, padronização, metadados, especificação de serviços geográficos e o relacionamento dos nós das Infraestrutura de Dados Espaciais que vão permitir a disseminação da informação geográfica de fácil acesso a usuários externos. Os procedimentos, benefícios e limitações são listados e problematizados de forma que demonstrem as etapas necessárias na elaboração da Infraestrutura de Dados Espaciais de nível organizacional para uma Unidade de Conservação. Conclui-se que uma Infraestrutura de Dados Espaciais depende de variáveis administrativas, culturais, técnicas e financeiras, o que leva a uma proposta de implementação por estágios. Também são elaboradas críticas aos recursos existentes e sugestões para melhorias e estudos futuros. / This paper presents a proposal about Spatial Data Infrastructure in organizational level to the Parque Estadual de Intervales-SP, in order to promote the sharing of geographic information with the society. In the elaboration process of the SDI are discussed issues such as interoperability, standardization, metadata, specifying geographic services and relationship of the Spatial Data Infrastructure nodes that will enable the dissemination of geographic information easily and accessible to external users. The process steps, benefits and limitations are listed and discussed in order to demonstrate the necessary steps to prepare the Spatial Data Infrastructure in organizational level to a protected area. As results we observe a spatial data infrastructure that depends of others variables like management, culture, technical and financial company aspects, which leads to a proposal of implementation in stages, as well as discussions about the capabilities and suggestions for improvements and future studies.

Submitted by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-02-22T14:24:28Z No. of bitstreams: 1 romanetto_lm_me_mar.pdf: 2455878 bytes, checksum: 25b85b9fc9e1542b5eccb4e8abac7954 (MD5) / Approved for entry into archive by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-02-22T14:25:59Z (GMT) No. of bitstreams: 1 romanetto_lm_me_mar.pdf: 2455878 bytes, checksum: 25b85b9fc9e1542b5eccb4e8abac7954 (MD5) / Made available in DSpace on 2017-02-22T14:26:03Z (GMT). No. of bitstreams: 1 romanetto_lm_me_mar.pdf: 2455878 bytes, checksum: 25b85b9fc9e1542b5eccb4e8abac7954 (MD5) Previous issue date: 2017-01-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O controle de autoridade garante consistência aos sistemas de informação. Adotado na catalogação, o tema recebeu maior visibilidade durante a década de 1980 com a automação dos catálogos. Desde então, surgiram projetos direcionados ao intercâmbio e compartilhamento de dados de autoridade. O Virtual International Authority File (VIAF) é um consórcio de cooperação internacional entre bibliotecas e agências nacionais que disponibiliza arquivos de autoridade no Linking Open Data. Este estudo foi desenvolvido com o intuito de responder ao problema de pesquisa: como o controle de autoridade no VIAF contribui para a efetivação da Web Semântica de modo a proporcionar maior qualidade aos sistemas de busca e recuperação da informação? Para isso, foram definidos os objetivos: 1) descrever sobre os princípios, técnicas e padrões que proporcionam o controle de autoridade na catalogação; 2) analisar o controle de autoridade de nomes para pessoas, instituições e geográfico; 3) apresentar o VIAF, sua origem, as tecnologias envolvidas em sua estrutura e sua perspectiva de contribuição para a Web Semântica. A metodologia compreende um estudo qualitativo, de natureza aplicada, com objetivos exploratórios. Os resultados obtidos apresentam a abrangência internacional do VIAF e a caracterização sobre as tecnologias e a forma pela qual são estabelecidos os registros de autoridade no consórcio. Os registros de autoridade estabelecidos no VIAF compreendem a agregação de vocabulários de valor estabelecidos pelas principais agências catalogadoras no mundo, que têm sido adotados em Linking Open Data. / Authority control ensures consistency in information systems. Adopted in the cataloging, the theme received greater visibility from the automation of the catalogs, during the decade of 1980 with automation of catalogs. Since then emerged projects cooperation targeted to exchange and cooperation of authority data. The Virtual International Authority File (VIAF) is consortium of international cooperation between library and national agencies what provides authority file in the linking open data. This study was developed with intent to respond to research problem: how does the authority control in VIAF contributes to the effectiveness from the semantic web so provide higher quality to the search systems and information retrieval? For this were defined the objectives: 1) to describe about the principles, techniques and standards what provide authority control in cataloging; 2) to analyze authority control of names for people, institutions and geographical; 3) present the VIAF, your origin, the technologies involved in your structure and its perspective of contribution to the Semantic Web. The methodology comprises a qualitative study of an applied nature with exploratory objectives. The obtained results present the international scope of VIAF and characterization about the technologies and the way in which are established authority records in the consortium. The authority established the VIAF records comprise the vocabulary of aggregate value established by the main catalogers agencies in the world. What stands out to the importance relevance of the consortium to the international community.

Orientador: Plácida Leopoldina Ventura Amorim da Costa Santos / Banca: Marcos Luiz Mucheroni / Banca: José Augusto Chaves Guimarães / Resumo: Os avanços na Ciência e Tecnologia, particularmente na informática e nas telecomunicações, fizeram com que a Internet se tornasse uma das mais importantes fontes de informação. Ao mesmo tempo, a carência de dados adequados sobre os recursos disponíveis na Web leva à necessidade de criação de elementos descritivos que possam contribuir para a representação de tais recursos. Nesse sentido, a utilização de metadados parece ser a melhor solução para o problema. Metadados podem ser definidos como um conjunto de elementos que descrevem as informações contidas em um recurso, permitindo, assim, sua busca e recuperação. Desse modo, tem-se os metadados em, seu conceito, funcionamento, padrões existentes e formas de utilização, bem como as características e a estrutura do padrão Dublin Core para descrição de recursos na Web e, ainda, um estudo de diversos projetos que utilizam metadados. A análise dos projetos indica que o padrão Dublin Core, composto de um conjunto de 15 elementos, vem sendo amplamente utilizado por sua simplicidade de descrição, extensibilidade e interoperabilidade. Essa última característica é um requisito importante, considerando-se os diversos padrões de metadados existentes, pois a correspondência entre eles é fundamental para a troca de informações. Os resultados obtidos indicam que estudos de metadados conduzem à interoperabilidade entre os padrões existentes e sua representação por linguagens de marca, como a linguagem XML, juntamente com a arquitetura RDF. / Abstract: Advances in Science and Technology, particularly in computing science and telecommunication, have made the Internet one of the most important sources of information. At the same time, the lack of adequate data about the resources available on the Web calls for the need to create descriptive elements which may contribute to represent such resources. In this sense, the development of metadata seems to be the best solution to the problem. Metadata are a set of elements designed to describe the information of a resource, thus allowing its search and retrieval. This work presents a discussion of metadata, how they work on the Web, the existing standards and their use, the concepts found in various domains, the characteristics and structure of the Dublin Core standard used to describe the Web resources, and also a study of several projects adopting metadata. The analysis of the projects shows that the Dublin Core standard, which is a 15-element set of descriptors, has been widely used for its simplicity, extensibility and interoperability. The latter characteristic is an important requirement when considering the various metadata standards currently in use, since their correspondence is fundamental to information exchange. The results obtained indicate that metadata studies lead to interoperability among the existing standards and their representation by markup languages like XML, as well as RDF architecture. / Mestre

Orientador: Plácida Leopoldina Ventura Amorim da Costa Santos / Banca: Silvana Aparecida Barsotti Gregório Vidotti / Banca: Lídia Alvarenga / Resumo: A relevância tanto da Web quanto das bibliotecas digitais para os diversos ramos da ciência, tem impulsionado pesquisadores e comunidades científicas a buscar soluções de integração, intercâmbio e entendimento semântico sobre os conteúdos que nelas circulam. Verifica-se, no cenário atual, uma forte tendência para a disponibilização de conteúdos digitais e a falta de uso de padrões adequados para a representação e a descrição desses recursos em ambientes digitais, o que é apontado pela literatura como uma grande preocupação para a comunidade científica e focado neste trabalho enquanto problema da pesquisa. Nesse contexto, a proposição desta pesquisa é verificar na literatura científica a aplicabilidade e a funcionalidade das tecnologias e instrumentos disponíveis como padrões de representação e descrição de conteúdo e forma, no âmbito das bibliotecas digitais, com o objetivo de identificar e de caracterizar o uso e a aplicação do MarcOnt enquanto ferramenta para a construção de formas de representação da informação para bibliotecas digitais na atualidade, destacando-o como instrumento para descrição dos aspectos semânticos dos conteúdos digitais nestas ambiências. Como metodologia, o presente trabalho caracteriza-se por ser uma pesquisa de análise exploratória e descritiva do tema, com o qual é possível obter subsídios para um maior entendimento e compreensão mais detalhados do MarcOnt e as tecnologias que estão abarcadas no âmbito das bibliotecas digitais para a construção Web Semântica. Como resultado, procurou-se demonstrar a aplicação da ferramenta MarcOnt em um ambiente informacional específico, a Biblioteca Digital Semântica JeromeDL, para analisar nos fundamentos da Catalogação as formas de representação dos recursos informacionais. O que nos levou a definir categorias para análise futura do sistema em comparação com o padrão de metadados MARC21. / Abstract: The relevancy of not only the Web but also the digital libraries for the diverse branches of Science has stimulated researchers and scientific communities to search for integration solutions, interchange and semantic understanding about the contents that circulate in them. In the present scenary, a strong tendency is verified for the availability of digital contents and the lack of use of adequate patterns for the representation and description of those resources in digital environments, what is pointed by literature as a great concern for the scientific community and focused on this work as a problem of the research. In this context, the proposal of this research is to verify, in the scientific literature, the applicability and functionality of the technologies and instruments available as patterns of representation and description of content and form, in the ambit of digital libraries, with the objective of identifying and characterizing the use and the application of MarcOnt as a tool for the construction of forms of information representation for digital libraries at the present time, highlighting it as an instrument for describing the semantic aspects of the digital contents in these environments. As a methodology, the present work is characterized by being an exploratory and descriptive analysis of the subject, with which it is possible to obtain subsidies for a better and more detailed understanding and comprehension of MarcOnt and the technologies that are included in the ambit of digital libraries for the Semantic Web construction. As a result, it was attempted to demonstrate the application of the MarcOnt tool in a specific informational environment, the JeromeDL Semantic Digital Library, to analyze the fundamentals of Cataloguing the forms of representation of informational resources. That made us define the categories for the future analysis of the system comparing to the MARC21 metadata pattern. / Mestre