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We evaluate different call admission control policies in various mul-tiservice cellular scenarios. For each of the studied policies we obtain the maximum calling rate that can be offered to the system to achieve a given QoS objective defined in terms of blocking probabilities. We propose an optimization methodology based on a hill climbing algorithm to find(More)
The objective of this paper 1 is to provide a robust representation of moving images based on layers. To that goal, we have designed eecient motion estimation and segmentation techniques by aane model tting suitable for the construction of layers. Layered representations, originally introduced in 4] are important in several applications. In particular, they(More)
This paper presents a text-based emotion identification system based on text implemented by means of a language-independent architecture. The system includes several natural language processing tasks besides an affective keyword dictionary. The main novelty of the system is the incorporation of a semantic disambi-guation module which focuses on the meaning(More)
Measuring culture and its dynamics through surveys has important limitations, but the emerging field of computational social science allows us to overcome them by analyzing large-scale datasets. In this article, we study cultural dynamics through the votes in the Eurovision song contest, which are decided by a crowd-based scheme in which viewers vote(More)
We evaluate different call admission control policies in various multiservice cellular scenarios. For each of the studied policies we obtain the maximum calling rate that can be offered to the system to achieve a given QoS objective defined in terms of blocking probabilities. We propose an optimization methodology based on a hill climbing algorithm to find(More)
This article describes an architecture that enables visual prototyping of real-time audio applications and plugins. Visual prototyping means that a developer can build a working application, including user interface and processing core, just by assembling elements together and changing their properties in a visual way. The article addresses the problem of(More)