Fernando Barber

Fernando Barber
University of Valencia | UV · Department of Informatic

About

37
Publications
2,410
Reads
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162
Citations
Citations since 2016
10 Research Items
31 Citations
20162017201820192020202120220123456
20162017201820192020202120220123456
20162017201820192020202120220123456
20162017201820192020202120220123456
Additional affiliations
October 1996 - present
Universitat de València

Publications

Publications (37)
Article
The Purkinje system is a heart structure responsible for transmitting electrical impulses through the ventricles in a fast and coordinated way to trigger mechanical contraction. Estimating a patient-specific compatible Purkinje Network from an electro-anatomical map is a challenging task, that could help to improve models for electrophysiology simu...
Article
The reconstruction of the ventricular cardiac conduction system (CCS) from patient‐specific data is a challenging problem. High‐resolution imaging techniques have allowed only the segmentation of proximal sections of the CCS from images acquired ex‐vivo. In this paper we present an algorithm to estimate the location of a set of Purkinje‐myocardial...
Article
Modeling the cardiac conduction system is a challenging problem in the context of computational cardiac electrophysiology. Its ventricular section, the Purkinje system, is responsible for triggering tissue electrical activation at discrete terminal locations, which subsequently spreads throughout the ventricles. In this paper, we present an algorit...
Conference Paper
Full-text available
The activation of the myocardial muscle is triggered by Purkinje-myocardial junctions (PMJs), which are the terminal sites of the specialised cardiac conduction system (CCS). Obtaining the location of the PMJs and other sources of endocardial ectopic activity would be desirable for building computer models of cardiac electrophysiology and planning...
Conference Paper
Full-text available
Electro-anatomical mapping is a widely used technique used by electrophysiologists to understand patient's activation pattern. The system measures activation time at different locations but does not provide information on underlying electrical pathways or triggering points, such as Purkinje-myocardial junctions or ectopic foci. We present a method...
Conference Paper
Full-text available
Modeling the cardiac conduction system is a challenging problem in the context of computational cardiac electrophysiology. Its main structure in the ventricles is the Purkinje system, which is responsible for triggering heart contraction. Since it cannot be visualized by means of medical imaging techniques, it is commonly neglected or inversely est...
Article
Full-text available
Metropolitan mobility models, mainly based on the massive use of the car instead of the public transportation, will soon become unsustainable unless there is a change of citizens’ minds and transport policies. The main challenge related to urban mobility is that of getting free-flowing greener cities, which are provided with a smarter and accessibl...
Conference Paper
Full-text available
One typical source of problems in the Civil Infrastructure domain is the distributed and collaborative nature of the projects in which different profiles of engineers contribute with designs devoted to the interest of their field of expertise. Thus, situations in which there are different conflicts of interests are quite common. A conflict refers t...
Article
Full-text available
This article presents J-MADeM, a multi-modal decision making mechanism to provide agents in a Multi-Agent System (MAS) with a market-based model for complex decision problems. The model is basically based on a set of utility functions, expressing the preferences of the agents for a specific problem, and a one-round sealed-bid combinatorial auction...
Conference Paper
Full-text available
The mobility models followed within metropolitan areas, mainly based on the massive use of the car instead of the public transportation, will soon become unsustainable unless there is a change of citizens’ minds and transport policies. The main challenge related to urban mobility is that of getting free-flowing greener cities, which are provided wi...
Conference Paper
Full-text available
This paper presents a Q-Learning-based multiagent system oriented to provide navigation skills to simulation agents in virtual environments. We focus on learning local navigation behaviours from the interactions with other agents and the environment. We adopt an environment-independent state space representation to provide the required scalability...
Article
Full-text available
This paper proposes the use of ontologies to provide intel-ligent virtual environments with semantical information, which can be of great value to the virtual agents inhabiting the world. On the one hand, this approach allows us to define complex objects and to intro-duce semantic levels of detail that help the agents when sensing complex scenes. O...
Article
When simulating three-dimensional environments populated by virtual humanoids, immersion requires the simulation of consistent social behaviors to keep the attention of the users while displaying realistic scenes. However, intelligent virtual actors still lack a kind of collective or social intelligence necessary to reinforce the roles they are pla...
Conference Paper
Full-text available
This paper presents J-MADeM, a new market-based multi-agent ap- proach devoted to perform social simulations with BDI agents. J-MADeM is avail- able as an open-source library integrated into Jason (2), the successful interpreter for the AgentSpeak programming language (16). The aim of this work is to improve Jason by incorporating the main features...
Article
Full-text available
The simulation of synthetic humans inhabiting virtual environments is a current research topic with a great number of behavioral problems to be tackled. Semantical Virtual Environments (SVEs) have recently been proposed not only to ease world modelling but also to enhance agent-object and agent-agent interaction. Thus, we propose the use of ontolog...
Conference Paper
Full-text available
This paper presents MADeM, a multi-modal agent decision making to provide virtual agents with socially acceptable decisions. We consider multi-modal decisions as those that are able to merge multiple information sources received from a MAS. MADeM performs social decisions since it relies on auctions, a well known market-based coordination mecha- ni...
Article
Full-text available
This paper proposes the use of ontologies to provide virtual environments with semantic information, that can be also used by intel- ligent virtual agents. We present our semantic architecture focusing on the ontology which mainly supports complex object representation and interaction. This approach helps the actors when sensing complex ob- jects s...
Chapter
Full-text available
This paper presents a multiagent framework designed to animate groups of synthetic humans that properly balance task oriented and social behaviors. The work presented in this paper focuses on the BDI agents and the social model integrated to provide socially acceptable decisions. The social model provides rationality, to control the global coordina...
Conference Paper
Full-text available
This paper presents a multi-agent framework oriented to animate groups of synthetic humans that properly balance task-oriented and social behaviors. We mainly focus on the social model designed for BDI-agents to display socially acceptable decisions. This model is based on an auction mechanism used to coordinate the group activities derived from th...
Conference Paper
Full-text available
This work presents a market-based social model to produce good quality behavioral animations for groups of intelligent virtual agents. The social model coordinates the activities of groups of virtual characters and also includes social actions in the agent decision-making. We follow the Multi-Agent Resource Allocation approach presented in [2], whe...
Conference Paper
Full-text available
This paper presents a multi-agent framework designed to simulate synthetic humans that properly balance task oriented and social behaviors. The work presented in this paper focuses on the social library integrated in BDI agents to provide socially acceptable decisions. We propose the use of ontolo- gies to define the social relations within an arti...
Conference Paper
Full-text available
This paper presents a set of mechanisms oriented to incorporate social information into the decision taking of task-oriented 3DIVA. The aim of this approach is to integrate collaborative skills in different character’s roles (seller/buyer, worker, pedestrian, etc.) in order to enhance its behavioral animation. The collective intelligence expected i...
Conference Paper
Full-text available
In this paper, we describe the framework created for imple- menting AI-based animations for artificial actors in the context of IVE (Intelligent Virtual Environments). The minMin-HSP (Heuristic Search Planner) planner presented in (12) has been updated to deal with 3D dy- namic simulation environments, using the sensory/actuator system fully implem...
Conference Paper
Full-text available
This paper deals with the problem of sensing virtual environ- ments for 3D intelligent multi-character simulations. As these creatures should display reactive skills (navigation or gazing), together with the necessary planning processes, required to animate their behaviours, we present an ecient and fully scalable sensor system designed to provide...
Conference Paper
This paper is mainly dedicated to analyse the problem of discovering frequent temporal patterns in event sequences extracted from a large repository of newspapers. The proposed formalism and algorithms rely on Toodor, which is a document retrieval system that allows users to specify conditions over the structure, contents and temporal features of t...
Conference Paper
In this paper we study one of the drawbacks that have been considered against the use of discrete time in Temporal Reasoning Systems, which is the difficulty to represent continuous change. We study the representation of continuous change for the particular case of a constraint solver over integers. We have used two different approaches. The first...
Article
The main objective of this paper is to provide an optimal way for students to control a computer-based teacher and interact with it. From previous experience, we took a special interest in improving the navigation through tutorial systems, and also in the evaluation techniques, designing and developing a new tutorial based on an open architecture....
Conference Paper
The aim of this paper is to present an implementation of the “general representation formalism”, a formalism to represent temporal knowledge, based on constraint logic programming (CLP). The work is a result of the ESPRIT project EQUATOR which focused on new formalisms and tools for developing applications requiring sophisticated time-related reaso...
Article
Full-text available
Resumen En este artículo presentamos una comparación entre dos formalismos de planificación válidos, utilizados en la animación comportamental de personajes virtuales 3D inteligentes. El primero de ellos, las redes jerárquicas de tareas (Hierarchical Task Networks, HTNs) han sido introducidas con éxito por Cavazza en entornos de storytelling [1][2]...
Article
Full-text available
Resumen— This paper presents MADeM, a multi-modal agent decision making to provide virtual agents with socially acceptable decisions. We consider multi-modal decisions as those that are able to merge mul-tiple information sources received from a MAS. MA-DeM performs social decisions since it relies on auc-tions, a well known market-based coordinati...

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Projects

Projects (2)
Project
Develop mathematical and numerical methods to estimate the Cardiac Conduction System (CCS) from patient specific data.
Project
Non-invasive characterization and diagnosis of cardiac arrhythmias by means of anatomical and functional 3D computational modelling of the human heart and torso.