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Biblioteca Digital do IPB (53.442 recursos)

A Biblioteca Digital do IPB, tem por objectivo divulgar e permitir o livre acesso à produção científica produzida pela comunidade académica, promovendo a integração, partilha e a visibilidade da informação científica e garantindo a preservação da memória intelectual do Instituto Politécnico de Bragança.

DIC - SI - Artigos em Actas de Conferências Indexadas

Mostrando recursos 1 - 18 de 18

  1. Information systems security policies: a survey in Portuguese public administration

    Lopes, Isabel Maria; Sá-Soares, Filipe de
    Information Systems Security is a relevant factor for present organizations. Among the security measures, policies assume a central role in literature. However, there is a reduced number of empirical studies about the adoption of information systems security policies. This paper contributes to mitigate this flaw by presenting the results of a survey in the adoption of Information System Security Policies in Local Public Administration in Portugal. The results are discussed in light of literature and future works are identified with the aim of enabling the adoption of security policies in Public Administration.

  2. Information systems security policies: a survey in Portuguese public administration

    Lopes, Isabel Maria; Sá-Soares, Filipe de
    Information Systems Security is a relevant factor for present organizations. Among the security measures, policies assume a central role in literature. However, there is a reduced number of empirical studies about the adoption of information systems security policies. This paper contributes to mitigate this flaw by presenting the results of a survey in the adoption of Information System Security Policies in Local Public Administration in Portugal. The results are discussed in light of literature and future works are identified with the aim of enabling the adoption of security policies in Public Administration.

  3. Identity management and e-learning standards for promoting the sharing of contents and services in higher education

    Alves, Paulo; Uhomoibhi, James
    In this paper, we present the status of identity management systems and e-learning standards across Europe, in order to promote the mobility and the sharing of contents and services in higher education institutions. With new requirements for authentication, authorization and identity management for Web applications, most higher education institutions implement several solutions to address these issues. At the first level, the adoption of directory Servers like LDAP, Active Directory and others, solve some problems of having multiple logins and passwords for authentication. The growing of Web applications like Learning management Systems, portals, Blogs, Wikis, and others, need a more effective way of identity management, providing security and accessibility....

  4. Agentes tutor e estilos de aprendizagem em ambientes adaptativos

    Alves, Paulo
    O Processo de Bolonha que pretende mudar o paradigma educativo passando a estar centrado no aluno, é um dos maiores desafios que o ensino superior enfrenta actualmente. Deste modo, constatando-se que a maioria das plataformas de e-learning são usadas como simples repositórios de conteúdos, pretende-se, através de uma abordagem baseada em actividades de aprendizagem, incentivar a mudança do processo educativo. Neste artigo é focada a importância das actividades de aprendizagem e o papel dos agentes tutor no apoio ao aluno, adaptando o ambiente de aprendizagem, detectando dificuldades e dando sugestões de recursos que reforcem os conhecimentos. A adaptação é feita com base no estilo de aprendizagem do aluno,...

  5. Trends in the development of e-learning in higher education and future directions

    Uhomoibhi, James; Palma, José; Alves, Paulo
    Teachers and students in higher education are coming to realize that to become competent practitioners there is need to take advantage of up-to-date digital technologies and learning practices. Learning process requires measurement and evaluation of students behaviour. In the case of e-learning evidence is sought for improvements resulting from the use of online tools and processes desired to achieve a given set of learning outcomes. In this 21st century, knowledge is fast becoming a powerful engine in life. The visions, innovations, and inventions are the building blocks of developing knowledgeable and sustainable society. E-learning has facilitated the use of a plethora of internet and web-based applications as...

  6. Case-based reasoning approach to adaptive web-based educational systems

    Alves, Paulo; Amaral, Luís; Pires, José Adriano
    Virtual learning environments systems are based on the classroom paradigm, in which the knowledge is transmitted for all the students in the same way. To enhance e-learning, adapting the contents to the needs of each student is essential, and a more personalized learning support is required. The adoption of pedagogical agents and new artificial intelligence methodologies can response to the needs of individual students and provide a more effective collaboration in virtual learning environments. The learning experience of each student can be adapted to others students with the same characteristics. The adaptation of past cases to solve new problems is one of the features of case-based reasoning methodology, which can provide an...

  7. The role of learning styles in intelligent tutoring systems

    Alves, Paulo; Pires, José Adriano; Amaral, Luís
    The Bologna Process changes the educational paradigm, to be focus on the student and in the learning outcomes. The majority of e-learning platforms are used as mere repositories of content, based on the classroom paradigm and don’t support the individualism of each student learning process. Through the integration of new pedagogical methodologies based on students learning styles, we present an approach to intelligent tutoring systems in order to improve the learning process. This article is focused on the importance of learning styles to create the student model in intelligent tutoring systems and what was the student’s feedback about the adaptation of the system to each...

  8. The role of learning styles in intelligent tutoring systems

    Alves, Paulo; Pires, José Adriano; Amaral, Luís
    The Bologna Process changes the educational paradigm, to be focus on the student and in the learning outcomes. The majority of e-learning platforms are used as mere repositories of content, based on the classroom paradigm and don’t support the individualism of each student learning process. Through the integration of new pedagogical methodologies based on students learning styles, we present an approach to intelligent tutoring systems in order to improve the learning process. This article is focused on the importance of learning styles to create the student model in intelligent tutoring systems and what was the student’s feedback about the adaptation of the system to each...

  9. Model-driven software development for pervasive information systems implementation

    Fernandes, José Eduardo; Machado, Ricardo J.; Carvalho, João Álvaro
    Model-driven development (MDD) conceptions and techniques essentially centre the focus of development on models. They are subject of current research as they allow enhanced productivity, technological platform independence and longevity of software artifacts. Another area of current research is the ubiquitous/pervasive computing area. This field of computing research focuses on the widespread adoption of embedded or mobile heterogeneous computing devices, which, when properly orchestrated, globally compose pervasive information systems (PIS). This work intends to clarify how should be MDD concepts and techniques structurally consolidated into an approach to software development for PIS. It involves two projects as case studies. From...

  10. Architecture to integrate broadband access networks and wireless grids

    Pereira, João Paulo
    Today, the access networks face two main challenges: the increasing bandwidth demand and mobility trends. All this will require fundamental changes to the operations of access networks, the functionality of network nodes and the architecture itself. By other side, the evolution of computing and communication networks toward decentralized and distributed systems implies that all the intelligence is on the edge nodes of the networks. Integrating wireless devices with the traditional wired grid infrastructure will allow the access (transfer, processing, etc) to the information that is now scattered across the different devices. In this paper, we present a new architecture and a cost model to support the new requirements of...

  11. Access networks for mobility: a techno-economic model for broadband access technologies

    Pereira, João Paulo; Ferreira, Pedro
    The two main challenges for the access networks are the increasing bandwidth demand and mobility trends. The "triple play" services required (Internet, telephone and TV services) lead to a great increase in bandwidth demand. However, the existing access networks are not able to support this increase, and the capacity to delivery broadband services remain as a challenge ("last mile problem"). The access network remains a bottleneck in terms of the bandwidth and service quality it affords the end user. Besides the bandwidth, other great challenge to access networks is the mobility and the user need to have internet access anywhere...

  12. Access networks for mobility: a techno-economic model for broadband access technologies

    Pereira, João Paulo; Ferreira, Pedro
    The two main challenges for the access networks are the increasing bandwidth demand and mobility trends. The "triple play" services required (Internet, telephone and TV services) lead to a great increase in bandwidth demand. However, the existing access networks are not able to support this increase, and the capacity to delivery broadband services remain as a challenge ("last mile problem"). The access network remains a bottleneck in terms of the bandwidth and service quality it affords the end user. Besides the bandwidth, other great challenge to access networks is the mobility and the user need to have internet access anywhere...

  13. Telecommunication policies for broadband access networks

    Pereira, João Paulo
    The "triple play" services required (Internet, telephone and TV services) lead to a great increase in bandwidth demand. However, the existing access networks are not able to support this increase, and the capacity to delivery broadband services remain as a challenge ("last mile problem"). The access network remains a bottleneck in terms of the bandwidth and service quality it affords the end user. Besides the bandwidth, other great challenge to access networks is the mobility and the user need to have internet access anywhere and anytime. Then, the increasing demand of "quad-play" (also known as quadruple-play) services, including video, voice,...

  14. Características dos profissionais em sistemas de informação: região de Trás-os-Montes (Portugal)

    Pereira, João Paulo; Pires, José Adriano
    The profile of the Information Systems Professionals remains a constant challenge for schools and employers. Constant environmental, technological and organizational changes may raise difficulties in keeping the curriculum of Information Systems updated. Thus, the knowledge and the abilities demanded of professionals are in constant transformation. School plays an essential role in the process of providing professionals with the necessary skills to operate in the Information Society. Their competence depends, largely, on an appropriate curriculum that must be adequate to the organizations necessities. This paper identifies the skills required for the IS professionals in the organizations located in the region of “Trás-os-Montes”...

  15. A cost model for broadband access networks: FTTx versus WiMAX

    Pereira, João Paulo
    Local communities and governments are taking various steps to fight the so-called "digital divide" between well served urban communities and undeserved areas. In order to make broadband access available to these under served areas, several technical solutions are available with the capacity to provide high speed Internet access, video, telephony services, etc. This paper presents a cost-model and a tool for the evaluation of broadband access technologies (xDSL, HFC, FTTx, WiMAX, PLC and satellite), and compares two technologies: FTTx and WiMAX. Our tool compares these different access technologies in different scenarios, and examining the capital expense and deployment of building...

  16. A cost model for broadband access networks: FTTx versus WiMAX

    Pereira, João Paulo
    Local communities and governments are taking various steps to fight the so-called "digital divide" between well served urban communities and undeserved areas. In order to make broadband access available to these under served areas, several technical solutions are available with the capacity to provide high speed Internet access, video, telephony services, etc. This paper presents a cost-model and a tool for the evaluation of broadband access technologies (xDSL, HFC, FTTx, WiMAX, PLC and satellite), and compares two technologies: FTTx and WiMAX. Our tool compares these different access technologies in different scenarios, and examining the capital expense and deployment of building...

  17. Student teachers' perceptions of the Internet: Motivation, influences, and use

    Almeida, Conceição; Morais, Carlos; Miranda, Luísa; Viseu, Floriano; Martinho, Helena
    The Internet's rapid growth and diffusion, both worldwide and in our country, as well as its importance for teacher education, made us feel the need to reflect on how our student teachers integrate themselves in such quite novel environmental conditions and teaching communities. This paper reports on one specific Portuguese university’s student teachers’ Internet usage during their teaching practice and what reasons motivated them to do so. It also looks into student teachers' perceptions about Internet discussion and usage by other teachers in their schools and, in particular, in their own disciplinary groups. The data was collected using a questionnaire...

  18. Portuguese student teachers' experiences, perspectives and expectations regarding the use of the internet

    Almeida, Conceição; Martinho, Helena; Viseu, Floriano; Morais, Carlos; Miranda, Luísa
    This paper reports on one specific Portuguese university’s student teachers’ opinions, experiences, perspectives and expectations regarding Internet usage. Data was collected using a questionnaire which was anonymously answered by 189 student teachers from 9 different preservice programs. Some differences were found between males and females and between the diverse program groups concerning opinions about the Internet and how they use it and expect to use it in the future. Some reflections are made about the effectiveness of our students’ technological preparation

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