Showing papers by "María del Mar Prados Gallardo published in 2005"
TL;DR: In this article, an abstract methodology based on over-and under-approximation of tccp models is presented to model the suspension behavior of a TCCP program, which mitigates the state explosion problem common to traditional model-checking algorithms.
22 citations
05 Sep 2005
TL;DR: This paper gives a method for using the tool SPIN to verify distributed software systems that use the API Socket and the network protocol stack TCPIP for communications.
Abstract: The application of model checking technology to real software seems to be a promising and realistic approach to increase its quality. There are some successful examples of tools for this purpose, mainly working with self-contained programs. However, verifying software that uses external functionality provided by the operating system via API s is currently a challenging trend.In this paper, we give a method for using the tool SPIN to verify distributed software systems that use the API Socket and the network protocol stack TCPIP for communications. Our approach consists in building a model of the underlying operating system to be joined with the original C code in order to obtain the input for the model checker. We define and use a formal semantics of the API to conduct the correct construction of models. The whole modelling process is transparent to the C programmer, because it is performed automatically and without special syntactic constraints in the input C code. Regarding verification, we consider optimization techniques suitable for this application domain, and we ensure that the system only reports potential (non-spurious) errors.
22 citations
Journal Article•
TL;DR: In this article, a synthesis of a study carried out inside the most extensive framework of two research projects in which the authors participated is presented, which analyzes educational speech, devices, strategies and semiotic resources that teachers and students use at the university classrooms.
Abstract: This work is influenced by conceptual and methodological tools coming from different perspectives as knowledge construction, discourse psychology, sociocultural theory, and classroom ethnography. A synthesis of a study carried out inside the most extensive framework of two research projects in which the authors participated is presented. The main aim of this paper is to study the processes of teaching-learning as construction of shared meanings. We analyse educational speech, devices, strategies, and semiotic resources that teachers and students use at the university classrooms. Specifically, the results obtained from the analysis of transcriptions of the educational speech produced in three classrooms of the Sciences of the Education Faculty at the University of Seville are developed. These results are a description of the educational speech by a joint of semiotic mechanisms and discourse strategies used by teachers and students in the process of teaching-learning. Our results are also a reflection about the possible relationship between activity in each one of the three classrooms (understood as settings of activity) and the ways of speech produced in the same settings.
14 citations
TL;DR: A clear scheme to use the language promela in order to formalize different elements in the active service (network EE, capsules and user applications) and the practical application of the approach to analyze an active multicast protocol using the model checker spin are included.
9 citations
TL;DR: This paper explores an alternative approach to keep the specification of different aspects to be analyzed consistent, taking into account the number and quality of existing tools for modelling and analyzing telecommunication software, and explores semi-automatic methods to integrate these tools in a way that is as transparent as possible for users.
6 citations
TL;DR: This paper introduces an abstract methodology which is based on over- and under-approximating tccp models and mitigates the state explosion problem which is common to traditional model checking algorithms.
6 citations
Journal Article•
TL;DR: In this article, a trabajo que presentamos tiene como objetivo fundamental analizar the mecanismos semioticos in virtud de los cuales el desarrollo cognitivo de los individuos is construido in interacciones de naturaleza instruccional.
Abstract: El trabajo que presentamos tiene como objetivo fundamental analizar los mecanismos semioticos en virtud de los cuales el desarrollo cognitivo de los individuos es construido en interacciones de naturaleza instruccional. Se maneja una consideracion de la interiorizacion, como el resultado de un conjunto de acciones que instructoras y aprendices desarrollan en la resolucion conjunta de problemas. Se defiende que el empleo de diferentes mecanismos semioticos, especialmente la perspectiva referencial, pueden contribuir a esta transicion. Se presentaran los resultados obtenidos en una investigacion en el marco de la Educacion de Adultos en las que uno de los miembros de una pareja actua de instructor y otro de aprendiz. Estos debian construir conjuntamente unas historias con una serie de tarjetas para despues narrar su contenido. El analisis se centra en el nivel estrategico de las acciones asi como en los procedimientos semioticos empleados en la mediacion de estas
2 citations
01 Jan 2005
2 citations