Supporting case-based retrieval by similarity skylines: Basic concepts and extensions

Conventional approaches to similarity search and case-based retrieval, such as nearest neighbor search, require the speci cation of a global similarity measure which is typically expressed as an aggregation of local measures pertaining to di erent aspects of a case. Since the proper aggregation of local measures is often quite di cult, we propose a novel concept called similarity skyline. Roughly speaking, the similarity skyline of a case base is de ned by the subset of cases that are most similar to a given query in a Pareto sense. Thus, the idea is to proceed from a d-dimensional comparison between cases in terms of d (local) distance measures and to identify those cases that are maximally similar in the sense of the Pareto dominance relation [2]. To re ne the retrieval result, we propose a method for computing maximally diverse subsets of a similarity skyline. Moreover, we propose a generalization of similarity skylines which is able to deal with uncertain data described in terms of interval or fuzzy attribute values. The method is applied to similarity search over uncertain archaeological data

Extracting Temporal Relationships in EHR: Application to COVID-19 Patients

Association rules are one of the most used data mining techniques. The first proposals have considered relations over time in different ways, resulting in the so-called Temporal Association Rules (TAR). Although there are some proposals to extract association rules in OLAP systems, to the best of our knowledge, there is no method proposed to extract temporal association rules over multidimensional models in these kinds of systems. In this paper we study the adaptation of TAR to multidimensional structures, identifying the dimension that establishes the number of transactions and how to find time relative correlations between the other dimensions. A new method called COGtARE is presented as an extension of a previous approach proposed to reduce the complexity of the resulting set of association rules. The method is tested in application to COVID-19 patients data.B-TIC-744-UGR20 ADIM: Accesibilidad de Datos para Investigación Médica of the Junta de Andalucí

An adaptive fuzzy approach for modelling visual texture properties

The analysis of the perceptual properties of texture plays a fundamental role in tasks like semantic description of images, content-based image retrieval using linguistic queries, or expert systems design based on low level visual features. The presence of these properties in images is very difficult to characterize due to their imprecision, and, moreover, because their perception may change depending on the user or the image context. In this paper, texture properties are modeled by means of an adaptive fuzzy approach that takes into account the subjectivity of the human perception. For this purpose, a methodology in two phases has been proposed. First, non-adaptive fuzzy models, that represent the average human perception about the presence of the texture properties, are obtained. For this modeling, we propose to learn a relationship between representative measures of the properties and the assessments given by human subjects. In a second phase, the obtained fuzzy sets are adapted in order to model the particular perception of the properties that a user may have, as well as the changes in perception influenced by the image context. For this purpose, the membership functions are automatically transformed on the basic of the information given by the user or extracted from the image context, respectively

Desarrollo de modelos para la segmentación difusa de imágenes en color

Tesis Univ. Granada. Departamento de Ciencias de la Computación e Inteligencia Artificial. Leída el 17 de julio de 200

AppRendo solo: Aprendizaje-servicio transversal para desarrollo de software accesible

En este trabajo describiremos cómo hemos aplicado la metodología educativa de Aprendizaje Como Servicio (ApS), durante varios años, en asignaturas relacionadas con la Dirección, Planificación y Gestión de Proyectos del grado y máster de Informática en la Universidad de Granada. Esta metodología conforma la planificación intencional de acciones de mejora de la realidad, la conexión de contenidos curriculares de asignaturas en actividades derivadas del servicio a la comunidad y la participación reflexiva, crítica y activa del estudiantado. Para su aplicación, planteamos proyectos realizados en equipo y enfocados intencionalmente al desarrollo de aplicaciones para la mejora de vida en personas con necesidades especiales. Dentro del contenido curricular de las asignaturas, incluimos temas relacionados con accesibilidad y habilidades blandas. Nuestros equipos de estudiantes tienen contacto con entidades colaboradoras reales durante todo el ciclo de vida del proyecto, replicando lo que ocurriría en un caso real de su futura vida profesional, lo cual es motivador y gratificante. En algunos casos, se ha conseguido financiación para completar y dejar instalada la aplicación para la entidad colaboradora. Describiremos en el artículo ejemplos de proyectos realizados hasta el momento y la estupenda experiencia del proyecto de innovación docente de este curso académico, con datos de calificaciones, cuestionarios y valoraciones de todos los implicados.In this paper, we present the application of Service-Learning teaching and learning methodology for several years in subjects related to Project Direction, Planning and Management, of the B.Sc and M.Sc degrees in Computer Science at the University of Granada. This methodology comprises the intentional planning of actions to improve the reality, the connection of curricular contents of subjects in activities derived from the service to the community, and the reflective, critical and active participation of the students. For its application, we propose team projects which are intentionally focused on the development of applications to improve the lives of people with special needs. Within the curricular content of the subjects, we include topics related to accessibility and soft skills. Our students are in contact with real entities throughout the project life cycle, as would happen in a real case in their future professional life, being motivating and rewarding. In some cases, funding has been obtained to complete and install the application for the entity. We will describe in the article examples of projects carried out so far, as well as the wonderful experience of the teaching innovation project of this academic year, with data derived from grades, questionnaires and evaluations of all those involved.Jose M. Moyano posee un contrato postdoctoral Juan de la Cierva Formación (FJC2020-043823-I) financiado por MCIN/AEI/10.13039/501100011033 y por la Unión Europea NextGenerationEU/PRTR