Ferrás, L., N. Ford, L. Morgado, and M. Rebelo. "
A numerical method for the solution of the time-fractional diffusion equation."
Computational Science and Its Applications – ICCSA 2014. Eds. B. M. Torre, S. Misra, A. M. A. C. Rocha, C. Torre, J. G. Rocha, M. I. Falcão, D. Taniar, B. Apduhan, and O.Gervasi. Switzerland: Springer International Publishing, 2014. 117-131.
Faustino, Pedro, Carlos Chastre, and Raquel Paula. "
Design model for square RC columns under compression confined with CFRP."
Composites Part B: Engineering. 57.February (2014): 187-198.
AbstractThe enhancement of the mechanical behaviour of reinforced concrete (RC) columns with regard to axial compression is an up-to-date concern, namely if the strengthening of existing structures is to be considered. In view of this, external confinement with FRP systems has been tested in order to become a feasible technique, since it seems to have important advantages over other systems such as its high strength and stiffness in relation to weight and its improvement of strength and ductility while confining RC columns. Square columns confined with FRP show a more complex interpretation of their behaviour, when compared to circular columns. Accordingly, the present work includes the analysis of two experimental programs regarding axial compression on CFRP confined RC columns: one on circular and square specimens with different corner radii; the other on square specimens with side lengths ranging from medium to large. Based on this, modelling equations are proposed to predict maximum axial load, axial strain and lateral strain, as well as the entire behaviour until failure with curves of axial load-axial strain and axial load-lateral strain. The modelling results show that the analytical curves are in general agreement with the presented experimental curves for a wide range of dimensions.
Cunha, Jácome, João Paulo Fernandes, Jorge Mendes, Rui Pereira, and João Saraiva. "
Embedding Model-Driven Spreadsheet Queries in Spreadsheet Systems."
Proceedings of the 2014 IEEE Symposium on Visual Languages and Human-Centric Computing. VLHCC '14. Washington, DC, USA: IEEE Computer Society, 2014. 151-154.
AbstractSpreadsheets are widely used not only to define mathematical expressions, but also to store large and complex data. To query such data is usually a difficult task to perform, usually for end user. In this work we embed the textual query language in the model-driven spreadsheet environment as a spreadsheet itself. The result is an expressive and powerful query environment that has knowledge of the business logic defined by the spreadsheet data (the spreadsheet model) to guide end users constructing correct queries.
Cunha, Jácome, João P. Fernandes, Jorge Mendes, and João Saraiva Embedding, Evolution, and Validation of Spreadsheet Models in Spreadsheet Systems. HASLab - High-Assurance Software Laboratory & Universidade do Minho, 2014.
AbstractThis paper proposes and validates a model-driven software engineering technique for spreadsheets. The technique that we envision builds on the embedding of spreadsheet models under a widely used spreadsheet system, so that models and their conforming instances are developed under the same environment. In practice, this convenient environment enhances evolution steps at the model level while the corresponding instance is automatically co-evolved. Finally, we have designed and conducted an empirical study with human users in order to assess our technique in production environments. The results of this study are promising and suggest that productivity gains are realizable under our model-driven spreadsheet development setting.
Cunha, Jácome, João Paulo Fernandes, Jorge Mendes, Rui Pereira, and João Saraiva. "
ES-SQL: Visually Querying Spreadsheets."
Proceedings of the 2014 IEEE Symposium on Visual Languages and Human-Centric Computing. VLHCC '14. Washington, DC, USA: IEEE Computer Society, 2014. 203-204.
AbstractThis paper presents ES-SQL, an embedded tool for visually constructing queries over spreadsheets. This tool provides an expressive query environment which has knowledge on the business logic of spreadsheets, and by this knowledge it assists the user in defining the intended queries.
Abreu, Rui, Jácome Cunha, João Paulo Fernandes, Pedro Martins, Alexandre Perez, and João Saraiva. "
FaultySheet Detective: When Smells Meet Fault Localization."
Proceedings of the 30th IEEE International Conference on Software Maintenance and Evolution. ICSME '14. Washington, DC, USA: IEEE Computer Society, 2014. 625-628.
AbstractThis paper presents a tool, dubbed FaultySheet Detective, for aiding in spreadsheet fault localization, which combines the detection of bad smells with a generic spectrum-based fault localization algorithm.
Cunha, Jácome, João Paulo Fernandes, Rui Pereira, and João Saraiva. "
Graphical Querying of Model-Driven Spreadsheets."
Human Interface and the Management of Information. Information and Knowledge Design and Evaluation. Ed. Sakae Yamamoto. Vol. 8521. Lecture Notes in Computer Science, 8521. Springer International Publishing, 2014. 419-430.
AbstractThis paper presents a graphical interface to query model-driven spreadsheets, based on experience with previous work and empirical studies in querying systems, to simplify query construction for typical end-users with little to no knowledge of SQL. We briefly show our previous text based model-driven querying system. Afterwards, we detail our graphical model-driven querying interface, explaining each part of the interface and showing an example. To validate our work, we executed an empirical study, comparing our graphical querying approach to an alternative querying tool, which produced positive results.
Cunha, Jácome, João Paulo Fernandes, Jorge Mendes, Rui Pereira, and João Saraiva. "
MDSheet – Model-Driven Spreadsheets."
Proceedings of the 1st Workshop on Software Engineering methods in Spreadsheets. Eds. Felienne Hermans, Richard F. Paige, and Peter Sestof. Vol. 1209. SEMS '14, 1209. CEUR, 2014. 31-33.
AbstractThis paper showcases MDSheet, a framework aimed at improving the engineering of spreadsheets. This framework is model-driven, and has been fully integrated under a spreadsheet system. Also, its practical interest has been demonstrated by several empirical studies.