FRSF - INVESTIGACIÓN Y PRODUCCIÓN CIENTÍFICA

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Author: search.filters.author.Blas, María JuliaStart date: 2024

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Now showing 1 - 4 of 4
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    Representación semántica de un cuerpo documental en base a una estructura de etiquetado
    (12º CoNaIISI, 2024) Schwab, Christian Germán; Blas, María Julia; Gonnet, Silvio
    Un cuerpo documental puede ser caracterizado por un conjunto de términos y de relaciones entre tales términos. En este trabajo se presenta un conjunto de estructuras de etiquetado para especificar dichos términos y relaciones. A partir de las reglas de etiquetado propuestas se describe un algoritmo para la extracción de los términos y relaciones definidos, y la definición de una ontología para su representación. La propuesta es ilustrada en un fragmento de la ley 24065, régimen de la energía eléctrica. El contar con herramientas de anotado y extracción de una representación semántica es vital para el posterior análisis y reutilización de ontologías existentes en dominios particulares, dado que la representación obtenida sirve como referencia para la evaluación de ontología existentes como posible representación del cuerpo documental.
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    Enhancing routed DEVS models with event tracking
    (Journal of the Brazilian Computer Society, 2025-06-17) Blas, María Julia; Toniolo, Mateo; Gonnet, Silvio
    The Routed Discrete Event System Specification (RDEVS) is a modular and hierarchical Modeling and Simulation (M&S) formalism based on the Discrete Event System Specification (DEVS) formalism that provides a set of design models for dealing with routing problems over DEVS. At the formal level, RDEVS models (as DEVS models themselves) are defined mathematically. However, software implementations of both formalisms are based on an object-oriented paradigm. Furthermore, at the implementation design level, the RDEVS formalism is represented by a conceptual model that uses DEVS simulators as execution engines. Even when RDEVS models can be executed with DEVS simulators, the resulting data (obtained as execution outputs) remains DEVS-based, restricting the study of event flows between models influenced by routing policies. This paper shows how the RDEVS formalism design was enhanced to include event tracking in the models without altering their expected behavior during simulation. Such an improvement is based on adding new features to existing RDEVS components. These features are defined as trackers, which are responsible for getting structured data from events exchanged during RDEVS executions. The proposed solution employs the Decorator pattern as a software engineering option to achieve the required goal. It was deployed as a Java package attached to the RDEVS library, devoted to collecting structured event flow data using JavaScript Object Notation (JSON). The results highlight the modeling benefits of adding event tracking to the original capabilities of the RDEVS formalism. For the M&S community, the novel contribution is an advance in understanding how best modeling practices of software engineering can be used to enhance their software tools in general and the RDEVS formalism in particular.
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    A modeling framework for complex systems
    (Winter Simulation Conference, 2024) Blas, María Julia; Gonnet, Silvio
    This paper presents a modeling framework for defining abstractions of real-world complex systems promoting the development of discrete-event simulation models based on DEVS. An ontology, a metamodel, and a reasoner are combined in one single structure to allow an upgrade of an abstraction model to an implementation model. Our motivation is to reduce the effort related to the modeling part when specifying DEVS models for complex systems described from an abstraction of reality built over a research question. Applications include an easier introduction to M&S for students of any scientific field that can define an abstraction model with an easier introduction to DEVS models (from formalization to implementation).
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    Mapping RDEVSNL-­based Definitions of Constrained Network Models to Routed DEVS Simulation Models
    (2024-03-27) Espertino, Clarisa; Blas, María Julia; Gonnet, Silvio
    The Routed DEVS (RDEVS) formalism has been introduced recently to provide a reasonable formalization for the simulation of routing processes over Discrete Event System Specification (DEVS) models. Due to its novelty, new software tools are required to improve the Modeling and Simulation (MS) tasks related to the RDEVS formalism. This paper presents the mapping between constrained network models obtained from textual specifications of routing processes and RDEVS simulation models implemented in Java. RDEVSNL context­free grammar (previously defined) is used to support the textual specification of a routing process as a constrained network model. Such grammar is based on a metamodel that defines the syntactical elements. This metamodel is used in this paper as a middleware that allows mapping constrained network model concepts with RDEVS simulation models. From such a constrained network model template, RDEVS Java implementations are obtained. The proposal is part of a work­in­progress intended to develop MS software tools for the RDEVS formalism using well­known abstractions to get the computational models through conceptual mapping. Using these tools, modelers can specify simulation models without needing to codify any routing implementation. The main benefits are i) reduction of implementation times and ii) satisfactory simulation model correctness regarding the RDEVS formalism.