Digital libraries for the preservation of research methods and associated artifacts

New digital artifacts are emerging in data-intensive science. For example, scientific workflows are executable descriptions of scientific procedures that define the sequence of computational steps in an automated data analysis, supporting reproducible research and the sharing and replication of best-practice and know-how through reuse. Workflows are specified at design time and interpreted through their execution in a variety of situations, environments, and domains. Hence it is essential to preserve both their static and dynamic aspects, along with the research context in which they are used. To achieve this, we propose the use of multidimensional digital objects (Research Objects) that aggregate the resources used and/or produced in scientific investigations, including workflow models, provenance of their executions, and links to the relevant associated resources, along with the provision of technological support for their preservation and efficient retrieval and reuse. In this direction, we specified a software architecture for the design and implementation of a Research Object preservation system, and realized this architecture with a set of services and clients, drawing together practices in digital libraries, preservation systems, workflow management, social networking and Semantic Web technologies. In this paper, we describe the backbone system of this realization, a digital library system built on top of dLibra.

OS TELEJORNAIS E A ERA DIGITAL: UM ESTUDO SOBRE AS TRANSFORMAÇÕES NO TRABALHO E NA CONSTRUÇÃO DAS NOTÍCIAS EM EMISSORAS REGIONAIS DO VALE DO PARAÍBA

Este trabalho dedica-se a examinar as principais mudanças que ocorrem no processo de construção da notícia nos telejornais regionais paulistas na última década. Objetivamos o estudo das tecnologias digitais conectadas e as consequentes alterações no trabalho dos profissionais envolvidos jornalistas, técnicos e engenheiros, a fim de entender os novos formatos aplicados na transmissão de conteúdo contando com o auxílio da internet. Para tanto, realizamos um estudo comparativo com duas emissoras da Região Metropolitana do Vale do Paraíba: TV Vanguarda, afiliada a Rede Globo, e a Tv Band Vale filiada ao Grupo Bandeirantes, que passaram por transformações em todas as dimensões da difusão de notícias com a digitalização dos seus processos tecnológicos e investimentos no ambiente virtual. Por meio da técnica de pesquisa observação participante chegou-se a conclusão de que a tecnologia é uma realidade adotada nas emissoras contribuindo para agilizar os trabalhos nas redações e aproximar o público dos telejornais.

OS TELEJORNAIS E A ERA DIGITAL: UM ESTUDO SOBRE AS TRANSFORMAÇÕES NO TRABALHO E NA CONSTRUÇÃO DAS NOTÍCIAS EM EMISSORAS REGIONAIS DO VALE DO PARAÍBA

Este trabalho dedica-se a examinar as principais mudanças que ocorrem no processo de construção da notícia nos telejornais regionais paulistas na última década. Objetivamos o estudo das tecnologias digitais conectadas e as consequentes alterações no trabalho dos profissionais envolvidos jornalistas, técnicos e engenheiros, a fim de entender os novos formatos aplicados na transmissão de conteúdo contando com o auxílio da internet. Para tanto, realizamos um estudo comparativo com duas emissoras da Região Metropolitana do Vale do Paraíba: TV Vanguarda, afiliada a Rede Globo, e a Tv Band Vale filiada ao Grupo Bandeirantes, que passaram por transformações em todas as dimensões da difusão de notícias com a digitalização dos seus processos tecnológicos e investimentos no ambiente virtual. Por meio da técnica de pesquisa observação participante chegou-se a conclusão de que a tecnologia é uma realidade adotada nas emissoras contribuindo para agilizar os trabalhos nas redações e aproximar o público dos telejornais.

The Dynamic Behavior of Individual Microtubules Associated with Chromosomes In Vitro

Mitotic movements of chromosomes are usually coupled to the elongation and shortening of the microtubules to which they are bound. The lengths of kinetochore-associated microtubules change by incorporation or loss of tubulin subunits, principally at their chromosome-bound ends. We have reproduced aspects of this phenomenon in vitro, using a real-time assay that displays directly the movements of individual chromosome-associated microtubules as they elongate and shorten. Chromosomes isolated from cultured Chinese hamster ovary cells were adhered to coverslips and then allowed to bind labeled microtubules. In the presence of tubulin and GTP, these microtubules could grow at their chromosome-bound ends, causing the labeled segments to move away from the chromosomes, even in the absence of ATP. Sometimes a microtubule would switch to shortening, causing the direction of movement to change abruptly. The link between a microtubule and a chromosome was mechanically strong; 15 pN of tension was generally insufficient to detach a microtubule, even though it could add subunits at the kinetochore–microtubule junction. The behavior of the microtubules in vitro was regulated by the chromosomes to which they were bound; the frequency of transitions from polymerization to depolymerization was decreased, and the speed of depolymerization-coupled movement toward chromosomes was only one-fifth the rate of shortening for microtubules free in solution. Our results are consistent with a model in which each microtubule interacts with an increasing number of chromosome-associated binding sites as it approaches the kinetochore.

Socialising Around Media (SAM): Dynamic Social and Media Content Syndication for Second Screen

Today's generation of Internet devices has changed how users are interacting with media, from passive and unidirectional users to proactive and interactive. Users can use these devices to comment or rate a TV show and search for related information regarding characters, facts or personalities. This phenomenon is known as second screen. This paper describes SAM, an EU-funded research project that focuses on developing an advanced digital media delivery platform based on second screen interaction and content syndication within a social media context, providing open and standardised ways of characterising, discovering and syndicating digital assets. This work provides an overview of the project and its main objectives, focusing on the NLP challenges to be faced and the technologies developed so far.

Policy Options for Improving the Functioning and Efficiency of the Digital Single Market in the Field of Copyright. CEPS Special Report No. 121, 19 November 2015

This study explores the existing policy problems and the possible options for reforming the EU copyright framework as provided by EU Directive 29/2001 on Copyright in the Information Society (InfoSoc Directive) and related legislation, with a specific focus on the need to strengthen the Internal Market for creative content. We find two main policy problems: i) the absence of a Digital Single Market for creative works; and ii) the increasing tension between the current system of exceptions and limitations and the legal treatment of emerging uses of copyrighted content in the online environment. Without prejudicing a future impact assessment that might focus on more specific and detailed policy options, our analysis suggests that ‘more Europe’ would be needed in the field of copyright, given the existing sources of productive, allocative and dynamic efficiency associated with the current system. Looking at copyright from an Internal Market perspective would, in this respect, also help to address many of the shortcomings in the current framework, which undermine legal certainty and industrial policy goals.

Surface velocity fields, digital elevation models and ice front positions derived from multi-mission SAR remote sensing data at Sjögren Inlet glaciers, Antarctic Peninsula

Substantial retreat or disintegration of numerous ice shelves have been observed on the Antarctic Peninsula. The ice shelf in the Prince Gustav Channel retreated gradually since the late 1980's and broke-up in 1995. Tributary glaciers reacted with speed-up, surface lowering and increased ice discharge, consequently contributing to sea level rise. We present a detailed long-term study (1993-2014) on the dynamic response of Sjögren Inlet glaciers to the disintegration of Prince Gustav Ice Shelf. We analyzed various remote sensing datasets to observe the reactions of the glaciers to the loss of the buttressing ice shelf. A strong increase in ice surface velocities was observed with maximum flow speeds reaching 2.82±0.48 m/d in 2007 and 1.50±0.32 m/d in 2004 at Sjögren and Boydell glaciers respectively. Subsequently, the flow velocities decelerated, however in late 2014, we still measured about two times the values of our first measurements in 1996. The tributary glaciers retreated 61.7±3.1 km² behind the former grounding line of the ice shelf. In regions below 1000 m a.s.l., a mean surface lowering of -68±10 m (-3.1 m/a) was observed in the period 1993-2014. The lowering rate decreased to -2.2 m/a in recent years. Based on the surface lowering rates, geodetic mass balances of the glaciers were derived for different time steps. High mass loss rate of -1.21±0.36 Gt/a was found in the earliest period (1993-2001). Due to the dynamic adjustments of the glaciers to the new boundary conditions the ice mass loss reduced to -0.59±0.11 Gt/a in the period 2012-2014, resulting in an average mass loss rate of -0.89±0.16 Gt/a (1993-2014). Including the retreat of the ice front and grounding line, a total mass change of -38.5±7.7 Gt and a contribution to sea level rise of 0.061±0.013 mm were computed. Analysis of the ice flux revealed that available bedrock elevation estimates at Sjögren Inlet are too shallow and are the major uncertainty in ice flux computations. This temporally dense time series analysis of Sjögren Inlet glaciers shows that the adjustments of tributary glaciers to ice shelf disintegration are still going on and provides detailed information of the changes in glacier dynamics.

A 20 m spatial resolution seamless multisource Digital Elevation/Depth Model for Lizard Island, northern Great Barrier Reef

Hydrographers have traditionally referred to the nearshore area as the "white ribbon" area due to the challenges associated with the collection of elevation data in this highly dynamic transitional zone between terrestrial and marine environments. Accordingly, available information in this zone is typically characterised by a range of datasets from disparate sources. In this paper we propose a framework to 'fill' the white ribbon area of a coral reef system by integrating multiple elevation and bathymetric datasets acquired by a suite of remote-sensing technologies into a seamless digital elevation model (DEM). A range of datasets are integrated, including field-collected GPS elevation points, terrestrial and bathymetric LiDAR, single and multibeam bathymetry, nautical chart depths and empirically derived bathymetry estimations from optical remote sensing imagery. The proposed framework ranks data reliability internally, thereby avoiding the requirements to quantify absolute error and results in a high resolution, seamless product. Nested within this approach is an effective spatially explicit technique for improving the accuracy of bathymetry estimates derived empirically from optical satellite imagery through modelling the spatial structure of residuals. The approach was applied to data collected on and around Lizard Island in northern Australia. Collectively, the framework holds promise for filling the white ribbon zone in coastal areas characterised by similar data availability scenarios. The seamless DEM is referenced to the horizontal coordinate system MGA Zone 55 - GDA 1994, mean sea level (MSL) vertical datum and has a spatial resolution of 20 m.

A dynamic magnetic core memory /

"January 7, 1954"

Dynamic storage allocation : simulation techniques and efficient algorithms /

Thesis (M. S.)--University of Illinois at Urbana-Champaign.

Towards Automation in Digital Investigations : Seeking Efficiency in Digital Forensics in Mobile and Cloud Environments

Cybercrime and related malicious activity in our increasingly digital world has become more prevalent and sophisticated, evading traditional security mechanisms. Digital forensics has been proposed to help investigate, understand and eventually mitigate such attacks. The practice of digital forensics, however, is still fraught with various challenges. Some of the most prominent of these challenges include the increasing amounts of data and the diversity of digital evidence sources appearing in digital investigations. Mobile devices and cloud infrastructures are an interesting specimen, as they inherently exhibit these challenging circumstances and are becoming more prevalent in digital investigations today. Additionally they embody further characteristics such as large volumes of data from multiple sources, dynamic sharing of resources, limited individual device capabilities and the presence of sensitive data. These combined set of circumstances make digital investigations in mobile and cloud environments particularly challenging. This is not aided by the fact that digital forensics today still involves manual, time consuming tasks within the processes of identifying evidence, performing evidence acquisition and correlating multiple diverse sources of evidence in the analysis phase. Furthermore, industry standard tools developed are largely evidence-oriented, have limited support for evidence integration and only automate certain precursory tasks, such as indexing and text searching. In this study, efficiency, in the form of reducing the time and human labour effort expended, is sought after in digital investigations in highly networked environments through the automation of certain activities in the digital forensic process. To this end requirements are outlined and an architecture designed for an automated system that performs digital forensics in highly networked mobile and cloud environments. Part of the remote evidence acquisition activity of this architecture is built and tested on several mobile devices in terms of speed and reliability. A method for integrating multiple diverse evidence sources in an automated manner, supporting correlation and automated reasoning is developed and tested. Finally the proposed architecture is reviewed and enhancements proposed in order to further automate the architecture by introducing decentralization particularly within the storage and processing functionality. This decentralization also improves machine to machine communication supporting several digital investigation processes enabled by the architecture through harnessing the properties of various peer-to-peer overlays. Remote evidence acquisition helps to improve the efficiency (time and effort involved) in digital investigations by removing the need for proximity to the evidence. Experiments show that a single TCP connection client-server paradigm does not offer the required scalability and reliability for remote evidence acquisition and that a multi-TCP connection paradigm is required. The automated integration, correlation and reasoning on multiple diverse evidence sources demonstrated in the experiments improves speed and reduces the human effort needed in the analysis phase by removing the need for time-consuming manual correlation. Finally, informed by published scientific literature, the proposed enhancements for further decentralizing the Live Evidence Information Aggregator (LEIA) architecture offer a platform for increased machine-to-machine communication thereby enabling automation and reducing the need for manual human intervention.

Creating an authentic aural experience in the digital songlines game engine: Part of a contextualised cultural heritage knowledge toolkit

Digital Songlines is an Australasian CRC for Interaction Design (ACID) project that is developing protocols, methodologies and toolkits to facilitate the collection, education and sharing of indigenous cultural heritage knowledge. The project explores the areas of effective recording, content management and virtual reality delivery capabilities that are culturally sensitive and involve the indigenous custodians, leaders and communities in remote areas of the Australian ‘outback’. It investigates how players in a serious gaming sense can experience Indigenous virtual heritage in a high fidelity fashion with culturally appropriate interface tools. This paper describes a 3D ambient audio quilt designed and implemented specifically for the Digital Songlines software, which is built using the Torque Game Engine. The audio quilt developed provides dynamic ambient fauna and flora sound effects to represent the varying audio environment of the landscape. This provides an authentic contextualised interesting aural experience that can be different each time a location is entered. This paper reports on completed and ongoing research in this area.

Design Strategies and Modelling of Low-Power Sigma-Delta Analog-to-Digital Converters

Oggi, i dispositivi portatili sono diventati la forza trainante del mercato consumer e nuove sfide stanno emergendo per aumentarne le prestazioni, pur mantenendo un ragionevole tempo di vita della batteria. Il dominio digitale è la miglior soluzione per realizzare funzioni di elaborazione del segnale, grazie alla scalabilità della tecnologia CMOS, che spinge verso l'integrazione a livello sub-micrometrico. Infatti, la riduzione della tensione di alimentazione introduce limitazioni severe per raggiungere un range dinamico accettabile nel dominio analogico. Minori costi, minore consumo di potenza, maggiore resa e una maggiore riconfigurabilità sono i principali vantaggi dell'elaborazione dei segnali nel dominio digitale. Da più di un decennio, diverse funzioni puramente analogiche sono state spostate nel dominio digitale. Ciò significa che i convertitori analogico-digitali (ADC) stanno diventando i componenti chiave in molti sistemi elettronici. Essi sono, infatti, il ponte tra il mondo digitale e analogico e, di conseguenza, la loro efficienza e la precisione spesso determinano le prestazioni globali del sistema. I convertitori Sigma-Delta sono il blocco chiave come interfaccia in circuiti a segnale-misto ad elevata risoluzione e basso consumo di potenza. I tools di modellazione e simulazione sono strumenti efficaci ed essenziali nel flusso di progettazione. Sebbene le simulazioni a livello transistor danno risultati più precisi ed accurati, questo metodo è estremamente lungo a causa della natura a sovracampionamento di questo tipo di convertitore. Per questo motivo i modelli comportamentali di alto livello del modulatore sono essenziali per il progettista per realizzare simulazioni veloci che consentono di identificare le specifiche necessarie al convertitore per ottenere le prestazioni richieste. Obiettivo di questa tesi è la modellazione del comportamento del modulatore Sigma-Delta, tenendo conto di diverse non idealità come le dinamiche dell'integratore e il suo rumore termico. Risultati di simulazioni a livello transistor e dati sperimentali dimostrano che il modello proposto è preciso ed accurato rispetto alle simulazioni comportamentali.

TV DIGITAL INTERATIVA NO BRASIL: ESTUDO DOS APLICATIVOS INTERATIVOS STICKERCENTER E DO TELEJORNAL MGTV

Com o avanço da tecnologia e chegada da TV digital no Brasil, estudos apontam que a televisão aberta começa um novo estágio desde seu surgimento. Esta mídia disponibiliza ferramentas que permitem aos emissores de conteúdo uma dimensão interativa ainda não experimentada, sobretudo nos processos de comunicação massivos indicando que é possível novos caminhos de investimento na produção de conteúdo por parte das emissoras de TV. Com esta realidade de fundo, experiências começam a ser testadas no âmbito da televisão, como o StickerCenter, um software - desenvolvido pela TOTVS - que reúne elementos da internet na TV possibilitando ao receptor maior interação com o conteúdo televisivo, outra experiência é a realizada pela Rede Integração, afiliada à Rede Globo em Minas Gerais, com o software desenvolvido pela HXD Interactive Television, que testa um modelo brasileiro de interatividade no telejornal. Este trabalho mostra como estas duas empresas estão desenvolvendo aplicativos interativos para a TV utilizando o Middleware Ginga e os motivos pelos quais sua popularização não aconteceu. O StickerCenter não se popularizou e indica que o motivo seja erro de estratégia da empresa em desenvolver um produto que une broadband e broadcast TV sem atrativos ao consumidor, já o aplicativo interativo da Rede Integração não foi colocado no ar e apresenta inúmeros fatores que demonstram que não explorará a interatividade pela ausência de canal de retorno. Este estudo investigou o impacto da interatividade no mercado da radiodifusão e como a convergência tecnológica aponta para a construção de uma nova mídia baseada em displays interativos capazes de oferecer aos consumidores uma nova forma de recepção de conteúdo.

ENSINO MÉDIO, LÍNGUA PORTUGUESA E PORTAL EDUCACIONAL: percepções emergentes das narrativas de alunos inseridos em práticas de letramento digital

A educação contemporânea está inserida num contexto de velozes e dinâmicas transformações sociais e culturais, principalmente com o avanço e incorporação das Tecnologias Digitais de Informação e Comunicação (TDIC) no cotidiano das pessoas. Na Sociedade da Informação, na Era do Conhecimento, é preciso ir além do saber ler, escrever e digitar. A escola, por sua vez, de maneira ainda morosa, busca adequar-se às exigências do universo digital do qual participam seus agentes. O Ensino Médio, foco de preocupação e reflexão por todos os envolvidos no processo educativo dessa modalidade, tenta alcançar sua proposta de formação integral dos jovens para o exercício do trabalho e da cidadania. À disciplina Língua Portuguesa reserva-se a missão de conciliar o ensino da norma-culta com os gêneros discursivos de tal forma a promover a inclusão digital dos alunos nas diversas circunstâncias de letramento às quais são submetidos. Nesse âmbito, este trabalho investigou: Que percepções dos processos formativos emergem quando os alunos refletem acerca das práticas pedagógicas e das vivências nas aulas de Língua Portuguesa em atividades mediadas por portal educacional? O objetivo geral da pesquisa é provocar a reflexão nos professores, de tal forma que repensem suas práticas pedagógicas e seu papel no processo educativo a fim de promover uma experiência educativa mais condizente com a realidade dos alunos. A metodologia adotada foi a pesquisa qualitativa de cunho investigativo, na modalidade narrativa, sob a luz de Clandinin e Connelly (2011). Pela inserção no cenário e proximidade afetiva com os participantes, assumiu-se o desafio de desenvolver uma pesquisa-ação, para isso, os instrumentos investigativos adotados foram: entrevista semiestruturada, diário de bordo, atividades realizadas no portal, conversas informais e caderno de campo. A análise dos dados permitiu a elaboração de oito categorias de análise, emergentes das narrativas dos participantes: interação e comunicação; sala de aula ampliada; gestão da aprendizagem; o registro de si e do outro; aprendizagem colaborativa e transformadora; incentivo à pesquisa; estudo autônomo; e, desafios. Os resultados alcançados apontaram para reflexões que não se encerram nas páginas deste trabalho, dentre elas destacam-se: a importância de ouvir o aluno para que as propostas pedagógicas sejam revistas e melhoradas; o testar, nas práticas diárias, é fundamental, é o buscar algo além do tradicional, em prol de um objetivo de aprendizagem definido; o desejo de aprender pode despertar no aluno o interesse pelo conhecimento, tornando-o mais autônomo em suas escolhas e caminhos; as TDIC podem colaborar com o processo de ensino e de aprendizagem, porém exigem envolvimento dos sujeitos, pois elas, enquanto instrumentos, não configuram o conhecimento, são os agentes que ao apropriar-se delas têm condições de obter o melhor de suas potencialidades. Futuros trabalhos poderão dar continuidade a este estudo e trazer grandes acréscimos ao contemplar as influências do uso das TDIC no cotidiano da escola, o que, certamente, será de grande contribuição para o cenário atual da Educação brasileira.