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In this article we argue that open agent organisations can be effectively designed and implemented as institutionalized electronic organisations ('electronic institutions') composed of a vast amount of heterogeneous (human and software) agents playing different roles and interacting by means of speech acts. Here we take the view that the desing and(More)
The design and development of open multi-agent systems (MAS) is a key aspect in agent research. We advocate that they can be realised as electronic institutions. In this paper we focus on the execution of electronic institutions by introducing AMELI, an infrastructure that mediates agentsý interactions while enforcing institutional rules. An innovative(More)
Locating boundaries between coherent and/or repetitive segments of a time series is a challenging problem pervading many scientific domains. In this paper we propose an unsupervised method for boundary detection, combining three basic principles: novelty, homogene-ity, and repetition. In particular, the method uses what we call structure features, a(More)
Nowadays, with the expansion of Internet, there is a need of methodologies and software tools to ease the development of applications where distributed homogeneous entities can participate. Multiagent systems, and electronic institutions in particular , can play a main role on the development of this type of systems. Electronic institutions define the rules(More)
Nowadays, music fans are beginning to massively use mobile digital music players and dedicated software to organize and play large collections of music. In this context , users deal with huge music libraries containing thousands of tracks. Such a huge volume of music easily overwhelms users when selecting the music to listen or when organizing their(More)
Popular music is a key cultural expression that has captured listeners' attention for ages. Many of the structural regularities underlying musical discourse are yet to be discovered and, accordingly, their historical evolution remains formally unknown. Here we unveil a number of patterns and metrics characterizing the generic usage of primary musical facets(More)
Time series are ubiquitous, and a measure to assess their similarity is a core part of many computational systems. In particular, the similarity measure is the most essential ingredient of time series clustering and classification systems. Because of this importance, countless approaches to estimate time series similarity have been proposed. However, there(More)
We h a ve studied the problem of generating expressive m usical performances in the context of tenor saxophone interpretations. We h a ve done several recordings of a tenor sax playing diierent Jazz ballads with diier-ent degrees of expressiveness including an inexpressive i n terpretation of each ballad. These recordings are analyzed, using SMS spectral(More)
In this article, we first survey the three major types of computer music systems based on AI techniques: (1) compositional, (2) improvisational, and (3) performance systems. Representative examples of each type are briefly described. Then, we look in more detail at the problem of endowing the resulting performances with the expressiveness that characterizes(More)