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)
—Achieving QoS (Quality of Service) in Mobile Ad-hoc NETworks (MANET) has been a research topic in the last years. In this paper we describe a QoS reservation mechanism for Mul-tirate Ad-hoc Networks. By multirate we refer to those networks where the mobile nodes can dynamically switch between several link rates. This allows the mobile nodes to select the(More)
There is a growing number of applications that nowadays need Quality of Service guarantees in order to provide their services correctly. Among these applications , we may cite Voice over IP, video-conference, video-on-demand etc. More recently, the spread of wireless networks , and more precisely, ad-hoc networks brought the attention to the need of a(More)
— Traditional ad-hoc routing protocols typically choose minimum hop paths for transmissions. In a multi-rate environment, where nodes may elect between several transmission rates in order to accommodate different channel conditions, these protocols usually choose paths that contain long range links, with low effective throughput and low reliability. In this(More)
— The paper has two parts: First, we present an overview of the IST WIreless DEployable Network System (WIDENS) Project. This project aims to define an easily deploy-able communication system to be used by emergency services and public safety in general. In this context, users require a communication system that should not depend on pre-existent(More)
— This paper provides an overview of the ongoing European Project called WIreless DEployable Network System (WIDENS) which aims at defining a rapidly deployable communication system for public safety or emergency services. In this context, users expect a highly reliable communication system that can support real time applications to allow teams to(More)