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Conditional models in performance evaluation of investment funds in Portugal: s...
Afonso, Osvaldo; Rodrigues, Paulo M. M.; Viegas, CristinaInvestment funds’ performance evaluation is one area of finance which has observed many developments over the past 40 years. In this field, traditional techniques of evaluation have not made use of models of conditional returns. These approaches do not allow for the temporal dependence of expected returns. To overcome this problem, Ferson and Schadt (1996) developed a new conditional performance evaluation ...
Sistema de Atravessamento de Passagens Estreitas para um Robot Móvel
Emanuel A. Oliveira; Paulo M. Dias; Vítor M. Santos; Luís AlmeidaIn this article, some solutions that have been developed for the navigation of a mobile robot are presented.These solutions use information perceived by sensors locatedon the robot, only.Using such information, two methods for localisation and navigation were developed. In the first method, called“natural localisation”, the robot uses its sensors to calibrate its position in a previou...
Ranking Algarve Tourists Preferences: An Ordered Probit Approach
Serra, Jaime; Correia, Antónia; Rodrigues, Paulo M.M.The starting point for tourism development is tourists’ preferences. Preferences are the cognitive motivations that drive tourists to a certain destination. There are a plethora of published studies in the field of tourist motivations, such as Dann (1977); Crompton (1979); Witt and Wright (1992); Pearce and Lee (2005) to name a few, who contributed to the understanding of this area of research. However, researc...
From Motivations to Yield Paths of Tourism Development: The Case of the Algarve
Serra, Jaime; Correia, Antónia; Rodrigues, Paulo M.M.This paper develops new measurements of tourist yield in the context of the Algarve, which is a sun and sand destination where tourism demand persistently grows, in spite of the signs of destination maturity. This growth contradicts the essence of maturity and drove this research, which attempts to identify the critical preferences which are able to improve destination positioning. According to Pine and Gilmore...
Information and Technology Implementation Issues in AAL Solutions
Vardasca, Ricardo; Costa, Angelo; Mendes, Paulo M.; Simões, RicardoWith the population ageing effect, the technological developments, and pressure to reduce the cost with healthcare, are reunited the conditions for the development of Ambient Assisted Living (AAL) solutions. This work is a revision of the current state of the art. Its aim is the characterization of the AAL solutions, within the AAL4ALL scope. Therefore, it is presented features, scenarios and projects, referrin...
The world tourism exports cycle
Gouveia, Pedro; Guerreiro, Raul Filipe; Rodrigues, Paulo M. M.Considering that tourism is an important industry on a global scale, this study analyses and compares the deviations cycles from the long-term trend of tourism exports for all regions of the world with the cycle of the European Union with 27 member states (EU27). In this context, the approach followed allows us to analyse and determine the synchronization between tourism exports cycles of various regions of...
O ciclo mundial de exportações de turismo
Gouveia, Pedro; Guerreiro, Raul Filipe; Rodrigues, Paulo M. M.Tendo como motivação a afirmação do turismo como uma das principais atividades à escala global, o presente estudo analisa e compara os ciclos de desvio em relação à tendência de longo prazo das exportações de turismo de todas as regiões do mundo tendo o ciclo da União Europeia a 27 países como referência. Neste contexto, a abordagem seguida permite analisar e determinar a sincronização entre ciclos das exportaç...
The role of holm oak edges in the control of disturbance and conservation of pl...
Azevedo, João; Possacos, Anabela; Aguiar, Carlos; Amado, Anabela; Miguel, Luis; Dias, Rui; Loureiro, Carlos; Fernandes, Paulo M.Holm oak (Quercus rotundifolia) woodlands have been able to persist in fire-prone landscapes in northern Portugal where they seem to play a relevant role in community and landscape level patterns and processes, namely in the control of disturbance events and in the maintenance of biodiversity. In this research we tested the following hypotheses: (i) holm oak woodlands affect fire behavior, mainly by disrupting ...
Tourism Demand in Portugal: Market Perspectives
Serra, Jaime; Correia, Antónia; Rodrigues, Paulo M. M.Tourism has experienced different levels of development in the different regions of Portugal. To frame this development, several panel data models were estimated. The main objective is to explain the evolution of overnight stays by nationality in each region. Secondary data from 2000 to 2010 was used. The analysis includes the main tourism markets, such as the United Kingdom, Germany, the Netherlands, Ireland, ...
Adaptive Chromatic Dispersion Compensation Using Electrical Transversal Filters
Luís M. R. Teixeira; Paulo M. N. P. Monteiro; Manuel Violas; António Teixeira; José Miguel SantosThis paper describes the possible use of electrical transversal filters as chromatic dispersion compensators in partially compensated light-wave systems. A particular case of a five-tap transversal filter is considered, and its performance evaluated based on the quality factor of the signal at the receiver.The bit-rates considered for computer simulations are 10Gbit/sand 40Gbit/s. ; This pa...
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