L. Cerda

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Association rules are considered to be the best studied models for data mining. In this article, we propose their use in order to extract knowledge so that normal behavior patterns may be obtained in unlawful transactions from transactional credit card databases in order to detect and prevent fraud. The proposed methodology has been applied on data about(More)
This paper investigates the performance of two low latency handoff protocols proposed by the IETF, namely pre-and Post-Registration. These protocols use Layer 2 triggers to reduce the built-in delay components of Mobile IP. We propose a simple analytical model that allows to assess the packet loss and the delay characteristics of these protocols. Their(More)
Preface This report gives an overview of results on the Available Bit Rate Service Category (ABR) for ATM networks obtained in the COST 257 action on " Impacts of New Services on the Architecture and Performance of Broadband Networks ". First we give an overview of the ATM Forum specifications of the ABR service category. Examples of ABR switch mechanisms(More)
The Available Bit Service (ABR) is a promising " best effort " service designed to achieve in ATM networks high efficiency and low cell loss. Since the ATM Forum approved a first standard, intensive research has been done about ABR. The aim of this paper is to analyse the main research topics involved in ABR, namely: the evaluation of traffic and congestion(More)
Preface This synopsis outlines the results of the COST-257 project, prepared for the final seminar to take place in Würzburg, Germany from 27.– 29.9.2000. COST belongs to a framework programme initiated by the Euro-pean Union and stands for " Cooperation in the field of Scientific and Technical Research " of EU, Central and Eastern European countries as(More)
If we knew what it was we were doing, it would not be called research, would it? Albert Einstein i Acknowledgments In 2004 I was given the opportunity to start working on a PhD and now you are reading this dissertation. In the period between 2004 and finishing this thesis, a lot has happened, with ups and downs. Many people have helped me in this period(More)
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