Browsing by Author "Baixeries i Juvillà, Jaume"
Now showing items 1-20 of 45
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A formal context for acyclic join dependencies
(2017)
Article
Open AccessAcyclic Join Dependencies (AJD) play a crucial role in database design and normalization. In this paper, we use Formal Concept Analysis (FCA) to characterize a set of AJDs that hold in a given dataset. This present work ... -
A formal context for closures of acyclic hypergraphs
(Springer, 2019-05-23)
Article
Open AccessDatabase constraints in the relational database model (RDBM) can be viewed as a set of rules that apply to a dataset, or as a set of axioms that can generate a (closed) set of those constraints. In this paper, we use Formal ... -
A lattice representation of relations, multivalued dependencies and Armstrong relations
(2005)
Conference report
Restricted access - publisher's policyWe present a lattice-base formalism to relate, in a novel way, different representation methods for relational data. Specifically, relations given extensionally by tuples, multivalued dependencies, and Armstrong relations ... -
A New Formal Context for Symmetric Dependencies
(2011)
Conference report
Open AccessIn this paper we present a new formal context for symmetric dependencies. We study its properties and compare it with previous approaches. We also discuss how this new context may open the door to solve some open problems ... -
Bateria de afasias Western. Cuaderno de estímulos en castellano.
(2022-09)
Research report
Restricted access - publisher's policyQuadern d'estímuls de la bateria d'afàsies Western adaptat per a la llengua castellana. Pensat per a passar a pacients amb afàsia. Es pot aplicar per a controls monolingües en l'estudi en contextos bilingües. -
Characterization and Armstrong relations for Degenerated Multivalued Dependencies using Formal Concept Analysis
(Springer, 2005)
Conference report
Restricted access - publisher's policyFunctional dependencies, a notion originated in Relational Database Theory, are known to admit interesting characterizations in terms of Formal Concept Analysis. In database terms, two successive, natural extensions of ... -
Characterization of database dependencies with FCA and pattern structures
(Springer International Publishing, 2014-04-12)
Part of book or chapter of book
Restricted access - publisher's policyIn this review paper, we present some recent results on the characterization of Functional Dependencies and variations with the formalism of Pattern Structures and Formal Concept Analysis. Although these dependencies ... -
Characterization of order-like dependencies with formal concept analysis
(2011)
Conference report
Open AccessFunctional Dependencies (FDs) play a key role in many fields of the relational database model, one of the most widely used database systems. FDs have also been applied in data analysis, data quality, knowl- edge discovery ... -
characterization of order-like dependencies with formal concept analysis
(2016)
Conference report
Open AccessFunctional Dependencies (FDs) play a key role in many fields of the relational database model, one of the most widely used database systems. FDs have also been applied in data analysis, data quality, knowledge discovery ... -
Characterizing approximate-matching dependencies in formal concept analysis with pattern structures
(2018-04-26)
Article
Open AccessFunctional dependencies (FDs) provide valuable knowledge on the relations between attributes of a data table. A functional dependency holds when the values of an attribute can be determined by another. It has been shown ... -
Characterizing covers of functional dependencies using FCA
(2018)
Conference report
Open AccessFunctional dependencies (FDs) can be used for various important operations on data, for instance, checking the consistency and the quality of a database (including databases that contain complex data). Consequently, a ... -
Characterizing functional dependencies in formal concept analysis with pattern structures
(2014-01-29)
Article
Restricted access - publisher's policyComputing functional dependencies from a relation is an important database topic, with many applications in database management, reverse engineering and query optimization. Whereas it has been deeply investigated in those ... -
Computing Functional Dependencies with Pattern Structures
(2012)
Conference report
Open AccessThe treatment of many-valued data with FCA has been achieved by means of scaling. This method has some drawbacks, since the size of the resulting formal contexts depends usually on the number of di erent values that are ... -
Contributions to the formalization of order-like dependencies using FCA
(2016)
Conference report
Open AccessFunctional Dependencies (FDs) play a key role in many fields of the relational database model, one of the most widely used database systems. FDs have also been applied in data analysis, data quality, knowledge discovery ... -
De Menos a Distinto: Estudio de la Implantación de R en las asignaturas del grado de estadística
(2016)
Conference report
Open AccessTeaching computer science in degrees that are not computer science related presents an important challenge: to motivate the students and to achieve good average grades. The student’s complaint is always based ... -
De menos a distinto: estudio de la implantación de R en las asignaturas del grado de estadística
(Universidad de Almería, 2016-07-05)
Conference lecture
Open AccessLos cursos de informática en las titulaciones que no son informáticas siempre pecan de falta de motivación y buenos resultados de los estudiantes. El argumento del estudiante acostumbra a ser: ¿A mí para que me servirá ... -
Exploring semanticity for content and function word distinction in catalan
(Multidisciplinary Digital Publishing Institute (MDPI), 2024-05-14)
Article
Open AccessIn the realm of linguistics, the concept of “semanticity” was recently introduced as a novel measure designed to study linguistic networks. In a given text, semanticity is defined as the ratio of the potential number of ... -
Frequent sets, sequences, and taxonomies: new, efficient algorithmic proposals
(2000-12)
Research report
Open AccessWe describe efficient algorithmic proposals to approach three fundamental problems in data mining: association rules, episodes in sequences, and generalized association rules over hierarchical taxonomies. The association ... -
INFORMÀTICA. Control 1 (Curs 2019-2020)
(Universitat Politècnica de Catalunya, 2019-11-05)
Exam
Restricted access to the UPC academic community -
INFORMÀTICA. Control 1 (Curs 2020-2021) - Q1
(Universitat Politècnica de Catalunya, 2020-11-11)
Exam
Restricted access to the UPC academic community
