http://hdl.handle.net/10362/2063 ISEGI 2013-05-24T14:09:40Z http://hdl.handle.net/10362/9678 Title: Implementação da diretiva INSPIRE na produção de cartografia geológica: o caso do estudo da Antiforma do Rosário, faixa Piritosa Ibérica Authors: Pereira, Aurete Maria Santos Abstract: Este trabalho trata da implementação do modelo de dados Inspire à cartografia geológica na infraestrutura de dados espaciais (IDE) do Laboratório Nacional de Energia e Geologia (LNEG), adaptando-o às especificidades da geologia portuguesa. Num futuro próximo, ao abrigo da diretiva Inspire, o LNEG terá de disponibilizar a sua cartografia geológica em conformidade com as disposições de execução aprovadas pelo Comité Inspire, no período de dois anos após a sua adoção, para os dados novos, e de sete anos para os restantes. Em paralelo deverá proceder gradualmente à harmonização dos dados da cartografia geológica por forma a torna-los interoperáveis em toda a Europa. Este trabalho defende que o processo de harmonizar os dados da cartografia geológica implica necessariamente a modificação/adaptação dos dados de origem ao modelo de dados Inspire GE estendido a aponta as razões que o justificam. As linhas de orientação seguidas têm em vista apresentar uma estrutura de gestão de dados mais eficiente para a cartografia geológica, interoperável de harmonizada por toda a Comunidade Europeia. A infraestrutura obtida irá permitir o armazenamento centralizado dos dados, o acesso a diferentes perfis de utilizador com a possibilidade de edição múltipla, bem como facilitar a obtenção e disponibilização de novos produtos (mapas, tabelas e/ou relatórios) derivados da informação geológica de base. Description: Trabalho de Projeto apresentado como requisito parcial para obtenção do grau de Mestre em Ciência e Sistemas de Informação Geográfica 2013-03-11T00:00:00Z http://hdl.handle.net/10362/9276 Title: Semantic web approach for dealing with administrative boundary revisions: a case study of Dhaka City Authors: Pervin, Shiuli Abstract: Dhaka City is the capital of Bangladesh and boundary revisions of Dhaka city refers to the changes of Dhaka city administrative boundary or jurisdiction over time. Dhaka is growing very fast in terms of population and area. So, government is redefining city boundaries and also making big units into several parts for better city management. Now, the challenge is to deal with these changes of administrative regions that seem to be helpful to match with census record that comes out every ten to fifteen years. Dhaka city boundary revisions dataset contains data about the name of the administrative unit, type of administrative unit, year of establishment, year of data record, geometry of administrative unit defining the jurisdiction, type of revisions occurred in the administrative units, time of revisions and the number of subdivisions inside an administrative unit. This thesis aims to integrate Dhaka city boundary revision dataset using semantic web technology that preserves information about changes occurred in the Dhaka city boundary over time. Description: Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies. 2013-01-30T00:00:00Z http://hdl.handle.net/10362/9233 Title: Recent droughts and the impact of North Atlantic Oscillation in Iberia; a spatiotemporal analysis based on vegetation temperature condition Index (VTCI) Authors: Mühlbauer, Stefan Ludwig Abstract: Drought is a complex phenomenon that afflicts huge areas worldwide with high spatial and temporal variability. Being under influence of the Mediterranean climate the Iberian Peninsula is per se prone to droughts. In this study, we applied the Vegetation Condition Temperature Index for a spatiotemporal drought analysis in Iberia. As a compound remote sensing drought index VTCI incorporates information on Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST). Suchlike, it overcomes the disadvantage of NDVI, which faces a lagged vegetation response to droughts and makes it less suitable for real-time drought monitoring. We took advantage of the full range of the VTCI scale and thus describe soil moisture conditions from ‘very dry’ to ‘wet’. In order to study the effect of North Atlantic Oscillation on the establishment of droughts during spring and summer, we correlated VTCI with the NAO winter index of one year. The study was accomplished for the years 2001 until 2005; additionally we adjoined the years 2007 and 2010 for their strong positive (negative) NAO winter index. The results as presented in the VTCI time series illustrate a typical ‘Mediterranean’ pattern with humid springs and persistently dry summers inside the Mediterranean fraction of Iberia. At least two months in spring are regarded to be wet, though with a high temporal and spatial variability: One area can be wet in one year and dry in the next one. March often is drier than middle spring months exhibiting accumulated precipitation deficiency of winter months, whereas a weak start into the growing season can be determining for the crop harvest of one year. The summer months become persistently dry in the Mediterranean region, while the North and Northwest as well as high elevation areas generally obtain sufficient precipitation also during the warm season. Spring months are particularly important for vegetation growth in terms of water availability, though the spatial and temporal pattern changes considerably in the intra-annual perspective. We found a dipolar correlation between VTCI and NDVI particularly in April and June. In April the NW of Iberia shows a high negative correlation between NAO and VTCI, the SE a strong positive correlation. In June the pattern flips showing positive correlation in the NW and negative correlation in the SE. The other summer months exhibit a similar pattern as June though with less significant correlation, while the pattern during the spring months alters, which coincides with the climatic variability during this season. The correlation findings accord with observations from the VTCI time series: We gave the example of the Duero Basin in the NW, where in April (negative correlation) indeed NAO+ years were drier (due to decreased VTCI) than NAOyears (increased VTCI) and the SE exhibited the opposite behaviour. Similar findings can be evidenced for the NW and SE of Iberia in June and July and the Balearic Islands in March. In terms of land cover NAO influences geographical areas rather than certain land cover types, which can be explained by the widely human induced landscape pattern of Iberia. From the land use classes agricultural lands and low vegetation are the classes most vulnerable to droughts; forests are the most resilient land classes. The study of correlation between a certain NAO winter index and drought occurrences is particularly interesting for the development of an outlook system of soil moisture for the period of highest vegetation activity in spring. The study detected come correlations between NAO and VTCI that indeed find spatial response on Iberian landmass. Description: Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies. 2013-02-28T00:00:00Z http://hdl.handle.net/10362/9226 Title: Cloud computing adoption - Determinants of cloud computing adoption by firms Authors: Espadanal, Mariana Beja Neves Abstract: Cloud computing has emerged as one of the most discussed topics among enterprise IT professionals. A multitude of factors influence the adoption of cloud computing in organizations. These decisive factors must be systematically evaluated prior to making the decision to adopt cloud-based solutions. The purpose of this study is to identify these factors and determine the extent to which they influence the adoption of cloud computing. To do so, the paper describes a research model that is based on the diffusion of innovation (DOI) theory and the technology-organization-environment (TOE) framework. Data collected from manufacturing and services sectors are used to test the suggested hypotheses. By analyzing the adoption of cloud computing in two distinct sectors, the study provides meaningful insights onto the determinants of cloud computing adoption. Description: Dissertação apresentada como requisito parcial para obtenção do grau de Mestre em Estatística e Gestão de Informação 2012-07-12T00:00:00Z