836 resultados para Research networks
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The assessment of the relationship between species diversity, species interactions and environmental characteristics is indispensable for understanding network architecture and ecological distribution in complex networks. Saproxylic insect communities inhabiting tree hollow microhabitats within Mediterranean woodlands are highly dependent on woodland configuration and on microhabitat supply they harbor, so can be studied under the network analysis perspective. We assessed the differences in interacting patterns according to woodland site, and analysed the importance of functional species in modelling network architecture. We then evaluated their implications for saproxylic assemblages’ persistence, through simulations of three possible scenarios of loss of tree hollow microhabitat. Tree hollow-saproxylic insect networks per woodland site presented a significant nested pattern. Those woodlands with higher complexity of tree individuals and tree hollow microhabitats also housed higher species/interactions diversity and complexity of saproxylic networks, and exhibited a higher degree of nestedness, suggesting that a higher woodland complexity positively influences saproxylic diversity and interaction complexity, thus determining higher degree of nestedness. Moreover, the number of insects acting as key interconnectors (nodes falling into the core region, using core/periphery tests) was similar among woodland sites, but the species identity varied on each. Such differences in insect core composition among woodland sites suggest the functional role they depict at woodland scale. Tree hollows acting as core corresponded with large tree hollows near the ground and simultaneously housing various breeding microsites, whereas core insects were species mediating relevant ecological interactions within saproxylic communities, e.g. predation, competitive or facilitation interactions. Differences in network patterns and tree hollow characteristics among woodland sites clearly defined different sensitivity to microhabitat loss, and higher saproxylic diversity and woodland complexity showed positive relation with robustness. These results highlight that woodland complexity goes hand in hand with biotic and ecological complexity of saproxylic networks, and together exhibited positive effects on network robustness.
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The research developed in this work consists in proposing a set of techniques for management of social networks and their integration into the educational process. The proposals made are based on assumptions that have been proven with simple examples in a real scenario of university teaching. The results show that social networks have more capacity to spread information than educational web platforms. Moreover, educational social networks are developed in a context of freedom of expression intrinsically linked to Internet freedom. In that context, users can write opinions or comments which are not liked by the staff of schools. However, this feature can be exploited to enrich the educational process and improve the quality of their achievement. The network has covered needs and created new ones. So, the figure of the Community Manager is proposed as agent in educational context for monitoring network and aims to channel the opinions and to provide a rapid response to an academic problem.
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The Habitats Directive has created a European network of protected areas combining environmental protection with social and economic activities. Although not clearly advocated in the Directive, participatory approaches have incrementally emerged in order to ensure an adequate management of the Natura 2000 network. This paper looks at the reasons why the European Commission on one side and the national/local authorities on the other side chose to engage in participatory approaches and assesses the structure, degree and scope of these approaches in the light of input and output legitimacy. Main findings are that participation was mostly implemented as a reaction to conflicts and out of a concern over policy implementation, two elements that continue to drive the philosophy of the Natura 2000 network‘s management. The limits of participation in Brussels are contrasted with the potential for more genuine and effective participation mechanisms on the field.
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Introduction – Based on a previous project of University of Lisbon (UL) – a Bibliometric Benchmarking Analysis of University of Lisbon, for the period of 2000-2009 – a database was created to support research information (ULSR). However this system was not integrated with other existing systems at University, as the UL Libraries Integrated System (SIBUL) and the Repository of University of Lisbon (Repositório.UL). Since libraries were called to be part of the process, the Faculty of Pharmacy Library’ team felt that it was very important to get all systems connected or, at least, to use that data in the library systems. Objectives – The main goals were to centralize all the scientific research produced at Faculty of Pharmacy, made it available to the entire Faculty, involve researchers and library team, capitalize and reinforce team work with the integration of several distinct projects and reducing tasks’ redundancy. Methods – Our basis was the imported data collection from the ISI Web of Science (WoS), for the period of 2000-2009, into ULSR. All the researchers and indexed publications at WoS, were identified. A first validation to identify all the researchers and their affiliation (university, faculty, department and unit) was done. The final validation was done by each researcher. In a second round, concerning the same period, all Pharmacy Faculty researchers identified their published scientific work in other databases/resources (NOT WoS). To our strategy, it was important to get all the references and essential/critical to relate them with the correspondent digital objects. To each researcher previously identified, was requested to register all their references of the ‘NOT WoS’ published works, at ULSR. At the same time, they should submit all PDF files (for both WoS and NOT WoS works) in a personal area of the Web server. This effort enabled us to do a more reliable validation and prepare the data and metadata to be imported to Repository and to Library Catalogue. Results – 558 documents related with 122 researchers, were added into ULSR. 1378 bibliographic records (WoS + NOT WoS) were converted into UNIMARC and Dublin Core formats. All records were integrated in the catalogue and repository. Conclusions – Although different strategies could be adopted, according to each library team, we intend to share this experience and give some tips of what could be done and how Faculty of Pharmacy created and implemented her strategy.
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Introduction. It is quite uncommon to associate migration with the rules on services trade. Indeed, all economic definitions of services insist on their immaterial nature and on the increased possibility of trading them ‘virtually’ over networks or else, without any physical movement of the parties involved. Somehow this ‘immaterial’ nature of services reflects on their providers/recipients which seem to be ‘invisible’. Even though most services still require the physical contact of the provider with the recipient1 and, when provided over national borders, do entail migration, service providers and/or recipients are rarely thought of as ‘immigrants’. This may be due to the fact that they enter the foreign territory with a specific aim and, once this aim accomplished, move back to their state of origin; technically they only qualify as short term non-cyclical migrants and are of little interest to policy-makers. A second reason may be that both service providers and recipients are economically desirable: the former are typically highly skilled and trained professionals and the latter are well-off ‘visitors’, increasing consumption in the host state. The legal definition of services in Article 57 TFEU (ex Art. 50 EC) further nourishes this idea about service providers/recipients not being migrants: the relevant Treaty rules only apply when the provisions on free movement of workers and freedom of establishment – themselves clearly linked to migration – do not apply. This distinction has been fleshed up by the ECJ which has consistently held that the distinction between the rules on establishment, on the one hand, and the rules on services, on the other, lies on duration.2 Indeed, all EC manuals state four types of service provision falling under the EC Treaty: a) where the service provider moves to the recipient’s state, for a short period of time (longer stay would amount to establishment), b) where the service recipients themselves move to the state where the service is offered (eg for medical care, education, tourism etc), c) where both service providers and recipients move together in another member state (eg a tourist guide accompanying a group travelling abroad) and d) where the service itself is provided across the borders (typically through the use of ICTs). None of these situations would typically qualify as migration. The above ‘dissociation’ between services and migration has been gradually weakened in the recent years. Indeed, migration is increasingly connected to the transnational provision of services. This is the result of three kinds of factors: developments in the European Court of Justice’s (ECJ) case law; legislative initiatives in the EU; and the GATS. Each one of these is considered in some detail below. The aim of the analysis which follows is to show the extent to which (legislative and judicial) policies aimed at the free provision of services actively affect migration conditions within the EU. The EC rules on the provision of services primarily affect the movement of EU nationals. As it will be shown below, however, third country nationals (TCNs) may also claim the benefits of the rules on services, either as recipients thereof or as employees of some EC undertaking which is providing services in another member state (posted workers).
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Two-sided payment card markets generate costs that have to be distributed among the participating actors. For this purpose, payment card networks set an interchange fee, which is the fee paid by the merchant’s bank to the cardholder’s bank per transaction. While in recent years many antitrust authorities all over the world - including the European Commission - have opened proceedings against card brands in order to verify whether agreements to collectively establish the level of interchange fees are anticompetitive, the Reserve Bank of Australia – as a regulator - has directly tried to address market failures by lowering the level of interchange fees and changing some network rules. The US has followed with new legislation on financial consumer protection, which also intervenes on interchange fees. This has opened a strong debate not only on legitimacy of interchange fees, but also on the appropriateness of different public tools to address such issues. Drawing from economic and legal theories and a comparative analysis of recent case law in the EU and other jurisdictions, this work investigates whether a regulation rather than a purely competition policy approach would be more appropriate in this field, considering in particular, at EU level, all of the competition and regulatory concerns that have arisen from the operation of SEPA with multilateral interchange fees. The paper concludes that a wider regulation approach could address some of the shortcomings of a purely antitrust approach, proving to be highly beneficial to the development of an efficient European single payments area.
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The analysis of clusters has attracted considerable interest over the last few decades. The articulation of clusters into complex networks and systems of innovation -- generally known as regional innovation systems -- has, in particular, been associated with the delivery of greater innovation and growth. However, despite the growing economic and policy relevance of clusters, little systematic research has been conducted into their association with other factors promoting innovation and economic growth. This article addresses this issue by looking at the relationship between innovation and economic growth in 152 regions of Europe during the period between 1995 and 2006. Using an econometric model with a static and a dynamic dimension, the results of the analysis highlight that: a) regional growth through innovation in Europe is fundamentally connected to the presence of an adequate socioeconomic environment and, in particular, to the existence of a well-trained and educated pool of workers; b) the presence of clusters matters for regional growth, but only in combination with a good ‘social filter’, and this association wanes in time; c) more traditional R&D variables have a weak initial connection to economic development, but this connection increases over time and, is, once again, contingent on the existence of adequate socioeconomic conditions.
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This paper outlines and elaborates the role of Europarties – political parties at European level – in the political system of the European Union (EU). It explores the key role and features of these organisations and claims that they are significant actors, particularly through their mobilisation of political parties and leaders. However, the conditions for Europarty influence are demanding. Europarties can be expected to matter when they are in numerical ascendance, relatively cohesive and able to mobilise their networks of political parties and leaders. These leaders remain first and foremost national politicians, responsible to national electorates. Therefore, Europarty influence and relevance overall remain conditioned on the domestic political context of national parties and leaders. Yet, functional pressures for transnational engagement serve to further institutionalise Europarties.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Transportation Department, Research and Special Programs Administration, Washington, D.C.
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Vita.
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"Presented at the 7th Hawaii International Conference on Systems Sciences."