Hierarchical categorisation of tags for delicious

In the scenario of social bookmarking, a user browsing the Web bookmarks web pages and assigns free-text labels (i.e., tags) to them according to their personal preferences. In this technical report, we approach one of the practical aspects when it comes to represent users' interests from their tagging activity, namely the categorization of tags into high-level categories of interest. The reason is that the representation of user profiles on the basis of the myriad of tags available on the Web is certainly unfeasible from various practical perspectives; mainly concerning the unavailability of data to reliably, accurately measure interests across such fine-grained categorisation, and, should the data be available, its overwhelming computational intractability. Motivated by this, our study presents the results of a categorization process whereby a collection of tags posted at Delicious #http://delicious.com# are classified into 200 subcategories of interest.Preprin

Rakennuksen käyttöjärjestelmän luonti: kokonaisvaltainen lähestymistapa

Purpose of this thesis is to examine requirements for a building operating system from a holistic perspective. To understand the context of the subject, an extensive literature review was carried out which explores the evolution of operating systems alongside the history of computing, unravelling the concept of an operating system. In addition, various building information systems, including building automation systems and internet of things systems are reviewed in order to understand modern and future trends of building technology. Furthermore, literature review investigates telecommunications and digital identity authentication through their evolution and standardisation towards interoperability, to provide knowledge on how to achieve interoperability in building systems. An interview study was conducted as the empirical part of the study in order to complement the theoretical framework of the thesis. A dozen building digitalisation experts were interviewed, inquiring their insights on the current and future situation of building systems. More closely, open systems, open data, platform ownership, disruption, killer applications, user-centredness, and Finland’s opportunities were discussed in respect of the building operating system. Building operating system requires connection between various technology inside a building, and collaboration between various parties who use and manage the building. The system should exploit open standards and enable open data. User-centred development should be encouraged for the benefits of end users. The system needs to expand globally to achieve critical mass and unleash its full potential as a platform. Each building with similar properties should have the same features, being able to use same services and applications in any building with an operating system, thus enabling portability. The system requires convenient software development kits, application programming interfaces and abstractions for the needs of software and service developers. A vibrant developer community is required to expand the platform and enable a wide range of services and applications.Tämän diplomityön tarkoituksena on tutkia rakennuksen käyttöjärjestelmän holistisia vaatimuksia. Laaja kirjallisuuskatsaus tehtiin aiheen ymmärtämiseksi, joka tutkii käyttöjärjestelmien evoluutiota rinnakkain tietojenkäsittelyn historian kanssa, tarkoituksena hahmottaa käyttöjärjestelmän käsitettä. Lisäksi, eri rakennusten tietojärjestelmiä, mukaan lukien rakennusautomaatiojärjestelmiä ja esineiden internet -järjestelmiä käytiin läpi ymmärtääkseen nykyisiä ja tulevia trendejä rakennusteknologiassa. Edelleen kirjallisuuskatsaus tutkii televiestintää ja sähköistä tunnistautumista niiden kehityksen ja standardisoinnin kautta kohti yhteentoimivuutta, tarjoten tietoa siitä, miten yhteentoimivuutta voitaisiin kehittää rakennusjärjestelmissä. Haastattelututkimus tehtiin diplomityön empiirisenä osuutena, jonka tarkoituksena oli laajentaa työn teoreettista viitekehystä. Tusina rakennusten digitalisaation asiantuntijaa haastateltiin, joilta kysyttiin rakennusjärjestelmien nykytilasta ja tulevaisuudesta. Lähemmin, keskustelut käsittelivät avoimia järjestelmiä, avointa dataa, alustan omistajuutta, disruptiota, menestyssovelluksia, käyttäjäkeskeisyyttä sekä Suomen kansainvälistä potentiaalia rakennuksen käyttöjärjestelmän näkökulmasta. Rakennuksen käyttöjärjestelmä vaatii rakennuksen sisällä olevien eri teknologioiden yhteenliittämisen, sekä yhteistyötä rakennusta käyttävien ja hallinnoivien osapuolten välillä. Järjestelmän pitäisi hyödyntää avoimia standardeja ja mahdollistaa avoimen datan käytön. Käyttäjäkeskeistä suunnittelua pitäisi kannustaa loppukäyttäjien etuja suosien. Järjestelmän täytyy levitä globaalisti saavuttaakseen kriittisen massan ja ottaakseen käyttöön sen koko potentiaalin. Jokaisella samankaltaisella rakennuksella täytyisi olla käytössään yhtäläiset ominaisuudet, mahdollistaen samojen palveluiden ja sovellusten käytön missä tahansa käyttöjärjestelmää käyttävässä rakennuksessa, täten mahdollistaen siirrettävyyden. Järjestelmä vaatii sopivat ohjelmointirajapinnat, abstraktiot ja ohjelmistokehykset sovellus- ja palvelukehittäjien tarpeita varten. Laaja kehitysyhteisö vaaditaan alustan levittämiseksi ja sovellustarjonnan laajentamiseksi

Hierarchical categorisation of web tags for Delicious

In the scenario of social bookmarking, a user browsing the Web bookmarks web pages and assigns free-text labels (i.e., tags) to them according to their personal preferences. The benefits of social tagging are clear – tags enhance Web content browsing and search. However, since these tags may be publicly available to any Internet user, a privacy attacker may collect this information and extract an accurate snapshot of users’ interests or user profiles, containing sensitive information, such as health-related information, political preferences, salary or religion. In order to hinder attackers in their efforts to profile users, this report focuses on the practical aspects of capturing user interests from their tagging activity. More accurately, we study how to categorise a collection of tags posted by users in one of the most popular bookmarking services, Delicious (http://delicious.com).Preprin

Scripts in a Frame: A Framework for Archiving Deferred Representations

Web archives provide a view of the Web as seen by Web crawlers. Because of rapid advancements and adoption of client-side technologies like JavaScript and Ajax, coupled with the inability of crawlers to execute these technologies effectively, Web resources become harder to archive as they become more interactive. At Web scale, we cannot capture client-side representations using the current state-of-the art toolsets because of the migration from Web pages to Web applications. Web applications increasingly rely on JavaScript and other client-side programming languages to load embedded resources and change client-side state. We demonstrate that Web crawlers and other automatic archival tools are unable to archive the resulting JavaScript-dependent representations (what we term deferred representations), resulting in missing or incorrect content in the archives and the general inability to replay the archived resource as it existed at the time of capture. Building on prior studies on Web archiving, client-side monitoring of events and embedded resources, and studies of the Web, we establish an understanding of the trends contributing to the increasing unarchivability of deferred representations. We show that JavaScript leads to lower-quality mementos (archived Web resources) due to the archival difficulties it introduces. We measure the historical impact of JavaScript on mementos, demonstrating that the increased adoption of JavaScript and Ajax correlates with the increase in missing embedded resources. To measure memento and archive quality, we propose and evaluate a metric to assess memento quality closer to Web users’ perception. We propose a two-tiered crawling approach that enables crawlers to capture embedded resources dependent upon JavaScript. Measuring the performance benefits between crawl approaches, we propose a classification method that mitigates the performance impacts of the two-tiered crawling approach, and we measure the frontier size improvements observed with the two-tiered approach. Using the two-tiered crawling approach, we measure the number of client-side states associated with each URI-R and propose a mechanism for storing the mementos of deferred representations. In short, this dissertation details a body of work that explores the following: why JavaScript and deferred representations are difficult to archive (establishing the term deferred representation to describe JavaScript dependent representations); the extent to which JavaScript impacts archivability along with its impact on current archival tools; a metric for measuring the quality of mementos, which we use to describe the impact of JavaScript on archival quality; the performance trade-offs between traditional archival tools and technologies that better archive JavaScript; and a two-tiered crawling approach for discovering and archiving currently unarchivable descendants (representations generated by client-side user events) of deferred representations to mitigate the impact of JavaScript on our archives. In summary, what we archive is increasingly different from what we as interactive users experience. Using the approaches detailed in this dissertation, archives can create mementos closer to what users experience rather than archiving the crawlers’ experiences on the Web

Accesibilidad no intrusiva en la comunicación audiovisual en la web

La brecha digital existe incluso en las economías más avanzadas. Sólo ciertos segmentos de la población se están beneficiando de las Tecnologías de la Información y la Comunicación. Muchas personas quedan excluidas debido a la edad, baja alfabetización, discapacidad o debido a que viven en regiones remotas. La accesibilidad para todos, incluidas las personas mayores y con discapacidad, es un requisito esencial para lograr la tan deseada inclusión social. Pero tal como se pretende demostrar, el hecho de alcanzar la conformidad con las pautas de accesibilidad o las normas establecidas, no es suficiente para garantizar una accesibilidad no intrusiva. El concepto de accesibilidad no intrusiva, aquí propuesto, supone cubrir las necesidades y preferencias de cualquier usuario sin interferencias debidas al requisito de cubrir la necesidad o preferencia de un grupo determinado de usuarios que, por su situación de discapacidad, en su más amplio sentido, lo requieran. Quizás donde resulta más molesta o inoportuna la «accesibilidad intrusiva» es en los contenidos multimedia en la web, por lo que el modelo accesibilidad no intrusiva aquí propuesto se centra, precisamente, en ese tipo de contenidos. De manera que el objetivo general de esta tesis es definir un modelo de presentación de contenidos multimedia que, cumpliendo con los requisitos de accesibilidad, no genere ningún tipo de intrusividad en la experiencia de uso. Por tanto, sus objetivos específicos son: a) identificar los elementos que pueden resultar intrusivos en la presentación de contenido multimedia, b) determinar los requisitos que han de cumplir en el modelo que se propone, c) diseñar las interfaces necesarias para garantizar la libertad y comodidad del usuario y, d) validar el modelo diseñado..

Self tailorable website interfaces : contributions towards the Design for All

Orientador: Maria Cecilia Calani BaranauskasTese (doutorado) - Universidade Estadual de Campinas, Instituto de ComputaçãoResumo: ...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital.Abstract: ...Note: The complete abstract is available with the full electronic documentDoutoradoAvaliação de interfaces de usuarioDoutor em Ciência da Computaçã