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Proveniente do ex-Centro de Documentação Europeia do Instituto Politécnico de Castelo Branco
Proveniente do Ex- CDE do Instituto Politécnico de Castelo Branco
Programas de computador
Descrição baseada em: Nº 17 (Mai. 1999)-
Descrição baseada em: Nº 4 (Mai. 1992)-
Tese de mestrado em Engenharia Mecânica, Faculdade de Ciências e Tecnologia, Coimbra, 2001
Tese de Mestrado em Engenharia Electrotécnica e de Computadores, Instituto Superior Técnico, 2001
Descrição baseada em: Nº 19 (Abr. 2000)
Descrição baseada em: Ano 1, nº 2 ( 2º semestre 2002)
Descrição baseada em: 8ª ed. (Jun. 2013)
proveniente de: ESTCB. LOTTSIG
Descrição baseada em: vol. 44,nº 4(Nov. 2001)
Descrição baseada em: Vol.XII, tomo 2, nº 116 (fev. 1991)
Contém referências bibliográficas
Industrial design intended as cultural heritage is witnessing a period's industrial production and creative thought; this legacy needs to be shared with a broader audience. The Milan area is full of studios and ateliers, where most Italian design projects were born. Even though they are no longer operating, these locations are still linked to the creative process and convey the atmosphere of the golden age of Italian design. Design research is essential in investi-gating archives' potential in constructing his-torical narratives and new research paths and learning tools. The paper describes two case studies for enhancing Design Culture through digital technology. A digitisation project for the archive of the famed Italian modeller Giovanni Sacchi to link heterogeneous data – sketches, technical drawings, images, physical models – to create an overall view of the design process and highlighting the creative thought. The se-cond describes LfAC, a mobile location-based application designed to lead visitors to discover Achille Castiglioni's projects in downtown Mi-lan: works are valorised and brought back to life through contextual contents delivered to visitors' smartphones.
As the twentieth century draws to a close there appears to be a consensus that teacher training can be delivered virtually using the Internet. Three EC funded international projects (T3, REM and TRENDS) have demonstrated that this is practical and there are other examples around the world. However, such-modes of teacher training are challenging and appear to require considerable re-engineering of educational processes as well as information and communication technologies. This paper discusses these challenges by focussing on the experience of a group of Portuguese student teachers and their tutor within the multinational EUMedea course.
The EUMedea Project was a teacher training on-line course of the T3 Project Telematics for Teacher Training about ‘Environmental Education’. It involved 11 groups of teachers/student teachers from five European countries: United Kingdom, Portugal, Italy, Finland and Holland. The aims of the course were: to designing environmental education project; use Internet to find information, share knowledge and co-operate in designing environmental education projects; use a Computer Mediated Communication (CMC) environment to work with other teachers co-operatively. This paper will present the results, discussions and reflections of the group of Castelo Branco (Portugal). The results of this experimental course will be an opportunity to reflect and propose several insights and clues for the future use of Internet on teacher training.
It is generally agreed that the choice of the most suitable uses based in soil and climatic factors, complemented with socio-economic criteria, promotes sustainable use of rural land. There are, however, different methodologies for defining the soil suitability to agroforestal systems or natural and seminatural ecosystems, including agricultural uses, forest plantations, agro-forestry areas and priority areas for nature conservation. Many of these methods rely on decision support systems based on multicriteria spatial analysis. In this study we intended to determine the different levels of suitability for agro-forestry use in a subregion located in the center of Portugal, near the border with Spain. To the effect we used a set of soil and topographic variables. The legal constraints and land cover were also included. The suitability evaluation was performed using the Analytic Hierarchy Process (AHP). A spatial analysis was also performed in order to confront the land use matrix with the soil potentiality. This analysis allows to identify areas where the use and management it is in accordance with their suitability, as well as areas where the use must be subject to a conversion or at least to a change of management mode.
This is a pre-copyedited version of a contribution published in Rocha A., Adeli H., Reis L.P., Costanzo S. (eds) Trends and Advances in Information Systems and Technologies. WorldCIST'18 2018 published by Springer. The definitive authenticated version is available online via https://doi.org/10.1007/978-3-319-77712-2_16
This paper deals with Single Carrier/Frequency Domain Equalization (SC/FDE) for uplink transmission within a Multi-User (MU) Multi-Input Multi-Output (MIMO) system where the number of Base Station (BS) antennas can be much larger than the number of transmitter antennas jointly using the same time/frequency resource at Mobile Terminals (MT). Selected Quadrature Amplitude Modulation (QAM) schemes are assumed for transmission, so that high bandwidth efficiencies are achievable. In this context, we consider either a linear detection or a reduced-complexity, iterative Decision Feedback (DF) detection, evaluate the achievable performances in both cases, and discuss them with the help of selected performance bounds and semi-analytically evaluated error floor levels. From our performance results, we conclude that simple linear detection techniques, designed to avoid the need of complex matrix inversions, can lead to unacceptably high error floor levels. However, by combining the use of such simple linear detectors with the appropriate interference cancellation procedure - within the iterative DF technique -, a close approximation to the Single-Input Multi-Output (SIMO) Matched-Filter Bound (MFB) can be achieved after a few iterations, even for 64-QAM schemes, when the number of BS antennas is five times higher than the number of antennas jointly used at the user terminals.
The central theme of the paper is to contribute to the discussion on the relevance of sustainable electric mobility as a beneficial element for tourism activities developed in protected areas. The topic is not recent, but the development of electromobilityhas increased interest and research, with a strong focus on urban areas, but also more and moreon natural areas.The aim is to determine if there is a potential field of electric mobility intervention, with benefit for tourism activities, in protected areas. For this, we called upon theliterature review and comparison with the case of a nature reserve located in Portugal. On the one hand, the investigation procedure focused on the analysis of the virtues and conflicts identified in the literature, along with the contextualization of sustainable mobility in natural areas. On the other hand, we tried to understand how these virtues and conflicts fit the case study, the Serra da Malcata Nature Reserve, in Portugal, as part of the development of an INTERREG project.It can be concluded, although no more substantial project indicators are available, that there is a possibility of overcoming existing conflicts, seeking to maximize the virtues and that it may have an impact not only on tourism activities but on the socioeconomic territory itself.
Obesity is a serious public health problem that has gained great expression in Portugal. Through several studies it has been verified that there are more and more individuals with excess and weight and obesity and that this risk factor begins to have an increasing expression at younger ages. Our study aims to determine the prevalence of overweight and obesity in the adult population of the district of Castelo Branco through the collection of data in each county. It is a cross-sectional, analytical and observational study whose sample collection took place in all municipalities in the district of Castelo Branco, totalling a sample of 11316 individuals, of whom 55.6% belonged to the female gender (n = 6292) and 44, 4% to males (n = 5024), with ages between 18 and 101 years, mean of 58.12 and standard deviation of 17.96 years. Of the total number of subjects in the study sample, 44.7% were overweight, 18.8% were obese, 0.9% were underweight, while 35.6% were within their normal range. The mean body mass index (BMI) was 26.62 kg / m2, with a standard deviation of 4,11 kg / m2, where the minimum BMI was 15.57 and the maximum was 50.78 kg / m2. The results show that there is a high prevalence of overweight and obesity in the adult population of the region.
Introduction: The purpose of the present investigation was to evaluate the motivations and the impact of the hydro-gymnastics in the physical fitness of old people involved in a 16 weeks exercise program. Methods: Participants were 83 old people doing a community hydro-gymnastics exercise program. Motivations were assessed using the Sport Activity Motivation Questionnaire and physical fitness was evaluated using the Functional Fitness Test battery, in two separate moments with a 16 weeks interval. The assumption of normality was checked using the Kolmogorov-Smirnov test. Wilcoxon test was used to compare the group in different time moments. Results: Regarding motivations to hydro-gymnastics the items that scored higher were: “need to exercise”, “be with friends”, “make new friends” and “fun”. In terms of physical fitness variation, improvements in average were found in practically all fitness test between the 1st and 2nd evaluation, with significant statistical differences in 3 of the 5 tests applied. Conclusions: Old people´s major motives to participate in hydro-gymnastics are related to the motivational dimensions of physical fitness, general affiliation and pleasure. Additionally, hydro-gymnastics exercise programs have a positive impact to improve physical fitness in old people and play a determinant role on health promotion and successful aging.
This paper describes a multivariate geostatistical methodology to delineate areas of potential interest for future sedimentary gold exploration, with an application to an abandoned sedimentary gold mining region in Portugal. The main challenge was the existence of only a dozen gold measurements confined to the grounds of the old gold mines, which precluded the application of traditional interpolation techniques, such as cokriging. The analysis could, however, capitalize on 376 stream sediment samples that were analyzed for twenty two elements. Gold (Au) was first predicted at all 376 locations using linear regression (R2=0.798) and four metals (Fe, As, Sn and W), which are known to be mostly associated with the local gold's paragenesis. One hundred realizations of the spatial distribution of gold content were generated using sequential indicator simulation and a soft indicator coding of regression estimates, to supplement the hard indicator coding of gold measurements. Each simulated map then underwent a local cluster analysis to identify significant aggregates of low or high values. The one hundred classified maps were processed to derive the most likely classification of each simulated node and the associated probability of occurrence. Examining the distribution of the hot-spots and cold-spots reveals a clear enrichment in Au along the Erges River downstream from the old sedimentary mineralization.
Monitoring changes of anthropogenic impacts from a broad scope of species in biodiversity research require practical, easy-to-use and efficient assessment as well as monitoring methods. Odonates (Insecta: Odonata) are a valuable tool for assessing freshwater systems’ quality and have been used as bioindicators of environmental variety. The Águeda watershed, located in the central west of the Iberian Peninsula, shows an exponential increase in the last 60 years of natural resource exploitation coupled with alterations in consumer habits, causing significant environmental changes and deferred direct effects on the natural habitats.
Fourteen river sites, selected a priori, were sampled. Adult odonates were collected using standardized methods. Selected environmental variables and water quality parameters were evaluated in situ. Precipitation and altitude were the most important physical, environmental variables in explaining the assemblage structure. Meaningful abiotic–biotic as well as biotic–biotic relationships were set up. Furthermore, situations in the
urbanized watershed area showed to be highly impacted and closely related with damselfly Ischnura graellsii, which should be targeted as a possible vulnerability indicator for polluted fresh waters.
A probability map for Ischnura graellsii distribution was performed using indicator kriging with external drift and spatial uncertainty obtain through the calculation of two categorical maps (binary), corresponding to the mean (0.485) and the trimmed mean by discharging the 10% lower distribution tail (0.533). The subsequent overlapping of both categorical maps (binary) allowed the definition of the higher spatial uncertainty map for surface water contamination.
A probabilistic Structural Equation Model (SEM) based on a Bayesian network construction is introduced to perform effective safety assessments for technicians and managers working on-site. Using novel AI software, the introduced methodology aims to show how to
deal with complex scenarios in blasting operations, where typologically different variables are involved. Sequential Bayesian networks, learned from the data, were developed while variables were grouped into different clusters, representing related risks. From each cluster, a latent variable is induced giving rise to a final Bayesian network where cause and effect relationships maximize the prediction of the accident type. This hierarchical structure allows to evaluate different operational strategies, as well as analyze using information theory the weight of the different risk groups. The results obtained unveil hidden patterns in the occurrence of accidents due to flyrock phenomena regarding the explosive employed or the work characteristics. The integration of latent class clustering in the process proves to be an effective safeguard to categorize the variable of interest outside of personal cognitive biases. Finally, the model design and the software applied to show a flexible workflow, where workers at different corporate levels can feel engaged to try their beliefs to design safety interventions.
Obligate coastline taxa generally occupy very limited areas, especially when there is a close affinity with a specific coast type. Climate change can be a meaningful threat for them, reducing suitable habitat or forcing migration events. Cistus ladanifer subsp. sulcatus is an endemic plant of Portugal, known to occur only in the top of its south-western coast’s prominent cliffs. In spite of being included in the annexes II and IV of the European Habitats Directive of Natura 2000 Network, this taxon is still understudied, especially regarding the effects of climate change on its distribution. To overcome such gap, Maxent was used to model the current distribution of C. ladanifer subsp. sulcatus and project its future distribution considering different General Circulation Models, periods (2050 and 2070) and Representation Concentration Pathways (4.5 and 8.5). The results suggested an extensive range contraction in the future, and extinction is a possible scenario. The proximity to littoral cliffs is crucial for this plant’s occurrence, but these formations are irregularly distributed along the coast, hindering range expansions, further inhibited by a small dispersal capacity. Cistus ladanifer subsp. sulcatus will probably remain confined to south-western Portugal in the future, where it will continue to face relevant threats like human activity, reinforcing the need for its conservation.
There are contexts where communication with TCP/IP protocol is not possible due to the lack of infrastructure or a reliable and continuous data transmission. In this cases, alternatives such as Opportunistic Networks (OPPNets) are valid. Such challenging conditions are common in rural areas and are a significant obstacle for the deployment of eHealth technologies for older adults. Considering this context, the present work introduces Interest-based System for Communication in Isolated Areas (ISCA), an OPPNet architecture for remote monitoring and emergency detection in ageing people who live alone. For this, the energetic requirements are considered, providing efficient and sustainable operation. The proposal makes use of a routing algorithm based on interests which enables asynchronous communication among entities. ISCA is evaluated over a realistic scenario and compared with similar state-of-the-art solutions. Experimental results show that ISCA notably improves the delivery probability with an enhancement of 52.25% in comparison to the second best alternative and provides a suitable average latency. Moreover, it also achieves better performance in terms of overhead and hops number compared to the other studied protocols.
The impact of mining activities on the environment is vast. In this regard, many mines were operating well before the introduction of environmental law. This is particularly true of cinnabar mines, whose activity has declined for decades due to growing public concern regarding Hg high toxicity. Here we present the exemplary case study of an abandoned Hg mine located in the Somiedo Natural Reserve (Spain). Until its closure in the 1970s, this mine operated under no environmental regulations, its tailings dumped in two spoil heaps, one of them located uphill and the other in the surroundings of the village of Caunedo. This study attempts to outline the degree to which soil and other environmental compartments have been affected by the two heaps. To this end, we used a novel combination of multivariate statistical, geostatistical and machine-learning The techniques used included principal component and clustering analysis, Bayesian networks, indicator kriging, and sequential Gaussian simulations. Our results revealed high concentrations of Hg and, secondarily, As in soil but not in water or sediments. The innovative methodology abovementioned allowed us to identify natural and anthropogenic associations between 25 elements and to conclude that soil pollution was attributable mainly to natural weathering of the uphill heap. Moreover, the probability of surpassing the threshold limits and the local backgrounds was found to 31 be high in a large extension of the area. The methodology used herein demonstrated to be effective for addressing complex pollution scenarios and therefore they are applicable to similar cases.
The impact of mining activities on the environment is vast. In this regard, many mines were operating well before the introduction of environmental law. This is particularly true of cinnabar mines, whose activity has declined for decades due to growing public concern regarding Hg high toxicity. Here we present the exemplary case study of an abandoned Hg mine located in the Somiedo Natural Reserve (Spain). Until its closure in the 1970s, this mine operated under no environmental regulations, its tailings dumped in two spoil heaps, one of them located uphill and the other in the surroundings of the village of Caunedo. This study attempts to outline the degree to which soil and other environmental compartments have been affected by the two heaps. To this end, we used a novel combination of multivariate statistical, geostatistical and machine-learning methodologies. The techniques used included principal component and clustering analysis, Bayesian networks, indicator kriging, and sequential Gaussian simulations. Our results revealed high concentrations of Hg and, secondarily, As in soil but not in water or sediments. The innovative methodology abovementioned allowed us to identify natural and anthropogenic associations between 25 elements and to conclude that soil pollution was attributable mainly to natural weathering of the uphill heap. Moreover, the probability of surpassing the threshold limits and the local backgrounds was found to be high in a large extension of the area. The methodology used herein demonstrated to be effective for addressing complex pollution scenarios and therefore they are applicable to similar cases.
Dissertação apresentada à Escola Superior Agrária do Instituto Politécnico de Castelo Branco para obtenção do Grau de Mestre em Sistemas de Informação Geográfica em Recursos Agro-Florestais e Ambientais
Dissertação apresentada à Escola Superior Agrária do Instituto Politécnico de Castelo Branco para obtenção do Grau de Mestre em Sistemas de Informação Geográfica em Recursos Agro-Florestais e Ambientais
Dissertação apresentada à Escola Superior de Artes Aplicadas do Instituto Politécnico de Castelo Branco para obtenção do grau de Mestre em Ensino de Música - Instrumento e Música
Dissertação apresentada à Escola Superior de Artes Aplicadas do Instituto Politécnico e Faculdade de Arquitetura da Universidade de Lisboa para obtenção do grau de Mestre em Ensino da Música - Instrumento e Classe de Conjunto
