No dia 25 de Setembro de 2023, faremos a migração do Repositório Institucional para a versão 7.6 do sistema DSpace. Por este motivo, o Repositório Institucional ficará indisponível neste dia. Contamos com a compreensão de todos.
Artigos - Matemática e Computação - FCT
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Analyzing Accessibility Reviews Associated with Visual Disabilities or Eye Conditions
(Conference on Human Factors in Computing Systems - Proceedings, 2023) [Trabalho apresentado em evento]Accessibility reviews collected from app stores may contain valuable information for improving apps accessibility. Recent studies have presented insightful information on accessibility reviews, but they were based on small ... -
A Cubic Memristive System with Two Twin Rössler-Type Chaotic Attractors Symmetrical About an Invariant Plane
(International Journal of Bifurcation and Chaos, 2022) [Artigo]Memristive circuits and systems have been widely studied in the last years due to their potential applications in several technological areas. They are capable of producing nonlinear periodic and chaotic oscillations, due ... -
Mathematical modeling for drug delivery and inflammation process: An application in macular edema
(Applied Mathematical Modelling, 2023) [Artigo]In this paper, we introduce a mathematical model for the drug release from an intravitreal implant and the subsequent effect of the drug on the inflammation process of macular edema. Coupling the drug transport problem ... -
Effects of anisotropy on the stability of Giesekus fluid flow
(Physics of Fluids, 2022) [Artigo]In the present work, the stability of a viscoelastic fluid flow is studied by linear stability theory, and some results are verified by direct numerical simulation. The investigation considers the fluid flow between two ... -
Numerical verification of sharp corner behavior for Giesekus and Phan-Thien-Tanner fluids
(Physics of Fluids, 2022) [Artigo]We verify numerically the theoretical stress singularities for two viscoelastic models that occur at sharp corners. The models considered are the Giesekus and Phan-Thien-Tanner (PTT), both of which are shear thinning and ... -
On a quasilinear elliptic problem involving the 1-Laplacian operator and a discontinuous nonlinearity
(Proceedings Of The Royal Society Of Edinburgh Section A-mathematics, 2022) [Artigo]In this work, we study a quasilinear elliptic problem involving the 1-Laplacian operator, with a discontinuous, superlinear and subcritical nonlinearity involving the Heaviside function H(middot - beta). Our approach is ... -
Fireasy: a tool to aid security policy modeling, translation and understanding firewall configuration
(2022 17th Iberian Conference On Information Systems And Technologies (cisti), 2022) [Trabalho apresentado em evento]Companies store increasing amounts of data, requiring the implementation of mechanisms to protect them from malicious people. There are techniques and procedures that aim to increase the security of computer systems, such ... -
A Memetic Framework for Solving the Lot Sizing and Scheduling Problem in Soft Drink Plants
(Variants Of Evolutionary Algorithms For Real-world Applications, 2012) [Artigo]This chapter presents a memetic framework for solving the Synchronized and Integrated Two-level Lot Sizing and Scheduling Problem (SITLSP). A set of algorithms from this framework is thoroughly evaluated. The SITLSP is a ... -
Heuristics and meta-heuristics for lot sizing and scheduling in the soft drinks industry: a comparison study
(Metaheuristics For Scheduling In Industrial And Manufacturing Applications, 2008) [Artigo]This chapter studies a two-level production planning problem where, on each level, a lot sizing and scheduling problem with parallel machines, capacity constraints and sequence-dependent setup costs and times must be solved. ... -
Periodic Orbits in the Muthuswamy-Chua Simplest Chaotic Circuit
(Journal of Dynamical and Control Systems, 2022) [Artigo]In 2010, Muthuswamy and Chua presented an autonomous chaotic circuit using only three elements in series: an inductor, a capacitor and a memristor. This circuit is known as the simplest chaotic circuit and it is determined ... -
New solutions and methodologies for data acquisition and management in small municipalities
(Methods and Applications of Geospatial Technology in Sustainable Urbanism, 2021) [Capítulo de livro]Promoting and managing sustainable territorial development require adequate tools that enable territorial managers to formulate appropriate choices. Technological solutions have emerged, and the paradigm has shifted from ... -
Fireasy: a tool to aid security policy modeling, translation and understanding firewall configuration
(Iberian Conference on Information Systems and Technologies, CISTI, 2022) [Trabalho apresentado em evento]Companies store increasing amounts of data, requiring the implementation of mechanisms to protect them from malicious people. There are techniques and procedures that aim to increase the security of computer systems, such ... -
Nonchaotic Behavior and Transition to Chaos in Lorenz-like Systems Having Invariant Algebraic Surfaces
(Chaos Theory and Applications, 2022) [Artigo]The famous and well-studied Lorenz system is considered a paradigm for chaotic behavior in three-dimensional continuous differential systems. After the appearance of such a system in 1963, several Lorenz-like chaotic systems ... -
Symmetry and symmetry breaking for Hénon-type problems involving the 1-Laplacian operator
(Communications in Contemporary Mathematics, 2022) [Artigo]In this work, we study a class of Hénon-type equations which involve the 1-Laplacian operator in the unit ball. Under mild assumptions on the nonlinearity, the existence of radial solutions is proved and, for a parameter ... -
A Machine Learning Strategy Based on Kittler’s Taxonomy to Detect Anomalies and Recognize Contexts Applied to Monitor Water Bodies in Environments
(Remote Sensing, 2022) [Artigo]Environmental monitoring, such as analyses of water bodies to detect anomalies, is recog-nized worldwide as a task necessary to reduce the impacts arising from pollution. However, the large number of data available to be ... -
Mid-reversibility properties of semigroup actions on homogeneous spaces
(Semigroup Forum, 2022) [Artigo]In this paper we study mid-reversibility of subsemigroups acting on homogeneous spaces. The mid-reversor set of a subsemigroup is defined and it is described in terms of the invariant control sets for semigroups acting on ... -
Nodal Solutions to Quasilinear Elliptic Problems Involving the 1-Laplacian Operator via Variational and Approximation Methods
(Indiana University Mathematics Journal, 2022) [Artigo]In this work we use two different methods to get nodal solutions to quasilinear elliptic problems involving the 1-Laplacian operator. In the first one, we develop an approach based on a minimization of the energy functional ... -
Semi-automatic CNN Architectural Pruning using the Bayesian Case Model and Dimensionality Reduction Visualization
(Proceedings Of The 17th International Joint Conference On Computer Vision, Imaging And Computer Graphics Theory And Applications (ivapp), Vol 3, 2022) [Trabalho apresentado em evento]Visualization techniques have been applied to reasoning about complex machine learning models. These visual approaches aim to enhance the understanding of black-box models' decisions or guide in hyperparameters configuration, ... -
Software Quality as a Subsidy for Teaching Programming
(Proceedings - Frontiers in Education Conference, FIE, 2021) [Trabalho apresentado em evento]Well-written code (which meets standards, conventions, and quality specifications) is often associated with the programmer's experience, which is why companies have been looking for increasingly qualified professionals. ... -
Toward prioritization of self-admitted technical debt: an approach to support decision to payment
(Software Quality Journal, 2022) [Artigo]Technical Debt (TD) is a metaphor that describes the cost–benefit relationship between postponing technical development activities and the consequences of this long-term postponement. The lack of TD Management compromises ...