Learn More
QoS adaptation is an important process in inter-domain service management, since it can guarantee the correct service provisioning when unexpected events occur. However, in inter-domain environments, the human interference and the manual-based operations hamper the deployment of expeditious mechanisms to adapt the QoS of the services. This paper presents an(More)
Virtual private networks (VPNs) are a popular and cost-effective means to build wide-area corporate networks, since they provide bandwidth, privacy and security for a fraction of the cost of private networks. However, establishing VPNs across different domains (inter-domain VPNs) is still a cumbersome task, requiring human- based negotiation between(More)
A taxonomic treatment for the 11 species of Elaphoglossum sect. Polytrichia found in Brazil is presented. The species of this section are recognized morphologically by the presence of subulate scales and lack of hydathodes on adult leaves. Two new species are described: E. amorimii and E. brevipetiolatum, both endemic to the Atlantic rainforest of eastern(More)
Inter-domain QoS-aware service provisioning is still a complex task due to the Internet heterogeneity. It is necessary to overcome several obstacles in order to achieve a scenario where providers fully interact to satisfy all customer service requirements. Some of these obstacles are service class specification and service composition. This paper presents(More)
Elaphoglossum fendleri, a new species from the cloud forests of Venezuela, is here described and illustrated. The type specimens were collected by Augustus Fendler ca. 160 years ago but had gone unnoticed since then. Some authors have confused it with E. ornatum, a subulate-scaled species that is restricted to the Venezuelan Andes. Elaphoglossum fendleri is(More)
This paper implements and evaluates a multi-criteria approach to select appropriate service providers in a large scale multi-provider environment. This approach uses the Analytic Hierarchy Process (AHP) method in a Peer-to-Peer Service Overlay Network (P2P SON) composed of several service providers in order to select the most suitable one to deliver the(More)
Managing a wireless sensor network is not a trivial task. Due to its limitations, such as sensors equipped with low power batteries, it is essential to extend the lifetime of the network. This task becomes harder when dealing with heterogeneous wireless sensor networks, in which sensors have different physical characteristics, such as battery capacity and(More)
Cooperation among service providers, network providers, and access providers in the Internet allows the creation of new services to offer to customers that are in other domains, thus increasing revenue. However, the Internet heterogeneous environment, where each provider has its own policies, infrastructure and business goals, hinders the deployment of more(More)
Elaphoglossum mickeliorum, a new species from the eastern slopes of the Peruvian Andes, is here described and illustrated. It belongs to E. sect. Polytrichia, which is characterized by the presence of subulate scales and absence of hydathodes on the sterile leaves of adult sporophytes. Herbarium specimens of this new species were first collected by Alwyn H.(More)
The number of urban vehicles has increased in the past years causing innumerous problems such as traffic jams, accidents and pollution. One of the main solutions for this problem is to improve the quality of public transportation by making it more reliable, secure and efficient. In this paper, it is proposed a system for monitoring urban vehicles based on(More)