Time filter

Source Type

science and, Portugal

Cavique L.,University Aberta
Advances in Intelligent Systems and Computing | Year: 2015

Sequence mining combines the discovery of frequent itemsets and the order they appear in. Most of the sequence pattern discovery techniques present some handicaps like the generation of a huge number of rules and the lack of scalability. In this work the proposed algorithm concerns the analysis of the whole rather than the parts, thus providing a holistic view of the sequences. The algorithm analyzes event logs and allows a non-expert user to understand the sequences using a poly-tree visualization. The scalability associated with condensed data structures, which shrink the data without losing information, allows dealing with the Big Data challenge. Ramex was implemented in different scenarios. © Springer International Publishing Switzerland 2015.

da Silva L.F.,University of Lisbon | Alves F.,University Aberta
Physis | Year: 2011

Science is the form of knowledge that has been established as a way to know the only and universally valid truth, based on the epistemological questions and criteria of methodological rigor. The lay knowledge that fills life and guides daily actions, seeks meaning through the symbolic cultural, as opposed to scientific knowledge. The issue of knowledge possibilities about the social reality placed the debate on ways of knowledge production and the consequent contingency of those productions, which substantiates the claim that all forms of knowledge are valid in their context of production. In terms of health and illness, the sociological production has unveiled the contents of lay knowledge and its indisputable presence in individual experience, since the perception of bodily phenomena until the relationship with the medical establishment. This text takes a sociological production on the knowledge issue. Then it reviews the key sociological literature on lay knowledge about health and illness. It concludes with a proposal for understanding lay knowledge processes as rationalities that, in the form of configurations of independent elements, keep health practices in everyday life.

Simao J.N.,University Aberta | Partidario M.R.,University of Lisbon
Sustainable Development | Year: 2012

Perhaps like few other industries, tourism depends and is built on environmental, physical and cultural local resources. In this sense, and as suggested by the scientific community and international agencies, sustainability should be a driver for tourism sector development. For this purpose, three main issues are relevant: the interpretation of the meaning of sustainability reflected in the vision of the destination for the sector; stakeholders' participation, balancing different approaches; and a strategic planning that calls for long-term view and action. The aim of this study is to assess whether the tourism planning of the destinations contributes to sustainable development. We have reviewed 11 local/regional tourism plans existing in Portugal, and the conclusions point to a vague interpretation of the concept of sustainability, to a type of planning that is closed to public participation with a lack of discussion on the kind of sustainability to implement and to difficulties in committing to strategic planning. © 2010 John Wiley & Sons, Ltd. and ERP Environment.

Simao J.,University Aberta
WIT Transactions on Ecology and the Environment | Year: 2010

The management of resources by a tourism destination is of crucial importance for sustainable tourism development. The Resource-based View, a relevant school of strategic thought, offers a conceptual model for the analysis of organizational resources. This paper proposes to extend this model to the sustainability of tourist destinations. That is, assuming the VRIO model, and recognizing its usefulness as a tool for resource analysis, we introduce the sustainability dimension. The VRISO(S) model proposed here is intended as a starting point for discussion about the management of tourism resources in the context of sustainable development and competitive advantage to be undertaken by Destination Management Organizations. © 2010 WIT Press.

Oliveira T.A.,University Aberta | Oliveira T.A.,University of Lisbon | Francisco C.,University Aberta
AIP Conference Proceedings | Year: 2015

Experimental design utilizing blocks was first presented by Ronald A. Fisher in the beginning of the 20th century with applications in agriculture. It became one of the areas of mass development for research in various fields, from agriculture to medicine, playing a central role not only on the research process but also on the new technological advances. As a branch of block designs, research on Balanced Incomplete Block Designs (BIBD) arose several interesting and defying problems within combinatory mathematics. BIBD designs can be constructed and analysed more easily with the aid of computer tools, such as the The R Project for Statistical Computing, which, as will be shown, contains several different tools just for this purpose. Hadamard matrices are present in our daily life, they give rise to a class of block designs named Hadamard configurations. It is easy and current to find their different applications based on new technologies and codes of figures such as Quick Response Codes (QR Codes). These are bi-dimensional bar codes that can be easily read by common devices which have image capture function, such as mobile phones. The use of such codes is very popular nowadays in simple things like to send a text message, a picture or for a batch of information regarding a product or whatever one desires. Error correction on these QR Codes make use of Hadamard matrices. The importance of using Qr Codes in cryptocurrencies and their links between the various methodologies using R software will be explored, as well as connections with Hadamard Matrices and BIBD. © 2015 AIP Publishing LLC.

Discover hidden collaborations