Isabelle Alvarez

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This paper proposes a new method to estimate the class membership probability of the cases classified by a Decision Tree. This method provides smooth class probabilities estimate, without any modification of the tree, when the data are numerical. It applies a posteriori and doesn’t use additional training cases. It relies on the distance to the decision(More)
This paper addresses the problem of the explanation of the result given by a decision tree, when it is used to predict the class of new cases. In order to evaluate this result, the end-user relies on some estimate of the error rate and on the trace of the classification. Unfortunately the trace doesn’t contain the information necessary to understand the(More)
Spatially explicit individual-based models are used more often in forest modeling, especially because they take into account the influence of the spatial structure on the dynamics. However, they are potentially very sensitive to the initial spatial structure used for a simulation, which can be problematic if the initial state is not known or is simulated in(More)
This paper addresses the issue of the explanation of the result given to the end-user by a classifier, when it is used as a decision support system. We consider machine learning classifiers, which provide a class for new cases, but also deterministic classifiers that are built to solve a particular problem (like in viability or control problems). The(More)
The present studies examined the actions of a series of novel arylpiperazine 5-hydroxytryptamine1A (5-HT1A) agonists, developed originally for anxiolytic efficacy, in several models of gastric secretion and experimental gastric mucosal injury. These models included conscious gastric acid secretion, pylorus ligation (gastric acid and pepsin secretion),(More)
Cizolirtine citrate (E-4018) is a new analgesic agent with antinociceptive activity against phenylquinone (ED50 33.7 mg/kg) and acetic acid (ED50 24.4 mg/kg) in mice, against acetic acid in rats (ED50 21.3 mg/kg) and in the plantar test (ED50 26.8 mg/kg). It demonstrated antinociceptive activity in the tail-pinch and tail-flick tests (ED50s of 68.0 and 46.0(More)
This paper proposes a new method to rank the cases classified by a decision tree. The method applies a posteriori without modification of the tree and doesn’t use additional training cases. It consists in computing the distance of the cases to the decision boundary induced by the decision tree, and to rank them according to this geometric score. When the(More)
This position paper proposes a vision for the research activity about sustainability in global environmental change (GEC) taking place in the FuturICT flagship project. This activity will be organised in an ”Exploratory”, gathering a core network of European scientists from ICT, social simulation, complex systems, economics, demographics, Earth system(More)
This paper addresses our experience in the design of a serious game, aimed at computer-based support for intercultural participatory management of protected areas (e.g., parks, marine reserves, biosphere reserves...), in order to promote biodiversity conservation and social inclusion. Its objective is, via a computer assisted role-playing game, to help(More)
Multi-agent systems (MAS) represent an effective approach for designing and constructing collaborative applications, designed as set of autonomous entities, named agents, which interact and coordinate. Some example of references on multi-agent systems are: [1], [2] [3]. Although multi-agent systems provide an effective approach for decentralized(More)