Michael Souza
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View article: Unveiling the Black Box: The Significance of XAI in Making LLMs Transparent
Unveiling the Black Box: The Significance of XAI in Making LLMs Transparent Open
As Large Language Models (LLMs) continue to evolve,their black-box nature poses significant challenges in termsof interpretability, trust, and accountability. Explainable ArtificialIntelligence (XAI) emerges as a crucial approach tomaking …
View article: PROCESS MANAGEMENT IN A UNIVERSITY RESTAURANT: CASE STUDY
PROCESS MANAGEMENT IN A UNIVERSITY RESTAURANT: CASE STUDY Open
University Restaurants (URs) are units that provide nutritionally balanced and low-cost meals to the university community, contributing to student retention. Managed by nutritionists, URs perform several activities, such as purchasing, sto…
View article: A Probabilistic Approach in the Search Space of the Molecular Distance Geometry Problem
A Probabilistic Approach in the Search Space of the Molecular Distance Geometry Problem Open
The discovery of the three-dimensional shape of protein molecules using interatomic distance information from nuclear magnetic resonance (NMR) can be modeled as a discretizable molecular distance geometry problem (DMDGP). Due to its combin…
View article: Conformal Coordinates for Molecular Geometry: from 3D to 5D
Conformal Coordinates for Molecular Geometry: from 3D to 5D Open
This paper introduces the conformal model (an extension of the homogeneous coordinate system) for molecular geometry, where 3D space is represented within R^5 with an inner product different from the usual one. This model enables efficient…
View article: A Comparison of Image and Scalar-Based Approaches in Preconditioner Selection
A Comparison of Image and Scalar-Based Approaches in Preconditioner Selection Open
Within high-performance computing (HPC), solving large sparse linear systems efficiently remains paramount, with iterative methods being the predominant choice. However, the performance of these methods is tightly coupled to the aptness of…
View article: High sensitivity characterization of an ultrahigh purity NaI(Tl) crystal scintillator with the SABRE proof-of-principle detector
High sensitivity characterization of an ultrahigh purity NaI(Tl) crystal scintillator with the SABRE proof-of-principle detector Open
We present new results on the radiopurity of a 3.4-kg NaI(Tl) crystal\nscintillator operated in the SABRE proof-of-principle detector setup. The\namount of potassium contamination, determined by the direct counting of\nradioactive $^{40}$K…
View article: Characterization of SABRE crystal NaI-33 with direct underground counting
Characterization of SABRE crystal NaI-33 with direct underground counting Open
Ultra-pure NaI(Tl) crystals are the key element for a model-independent verification of the long standing DAMA result and a powerful means to search for the annual modulation signature of dark matter interactions. The SABRE collaboration h…
View article: A new algorithm for the $^K$DMDGP subclass of Distance Geometry Problems
A new algorithm for the $^K$DMDGP subclass of Distance Geometry Problems Open
The fundamental inverse problem in distance geometry is the one of finding positions from inter-point distances. The Discretizable Molecular Distance Geometry Problem (DMDGP) is a subclass of the Distance Geometry Problem (DGP) whose searc…
View article: Growth of ultra-high purity NaI(Tl) crystals for dark matter searches
Growth of ultra-high purity NaI(Tl) crystals for dark matter searches Open
The annual modulation of scintillation event rate observed by the DAMA/LIBRA\nexperiment has been a long-standing controversy in the quest of the direct\ndetection of dark matter. The effort to definitively confirm or refute the\nannual mo…
View article: NMR Protein Structure Calculation and Sphere Intersections
NMR Protein Structure Calculation and Sphere Intersections Open
Nuclear Magnetic Resonance (NMR) experiments can be used to calculate 3D protein structures and geometric properties of protein molecules allow us to solve the problem iteratively using a combinatorial method, called Branch-and-Prune (BP).…
View article: Parallel Implementation of a Two-level Algebraic ILU(k)-based Domain Decomposition Preconditioner
Parallel Implementation of a Two-level Algebraic ILU(k)-based Domain Decomposition Preconditioner Open
We discuss the parallel implementation of a two-level algebraic ILU(k)-based domain decomposition preconditioner using the PETSc library. We present strategies to improve performance and minimize communication among processes during setup …
View article: Geometria do AINV
Geometria do AINV Open
Em trabalho apresentado no CNMAC2016, provamos que o algoritmo AINV [1] (Approximate INVerse), com adaptacoes minimas, pode ser utilizado para calcular a inversa de uma matriz simetrica e positivo definida (SPD) em bloco. Dentre as vantage…
View article: Parallel Implementation of a Two-level Algebraic ILU(k)-based Domain Decomposition Preconditioner
Parallel Implementation of a Two-level Algebraic ILU(k)-based Domain Decomposition Preconditioner Open
We discuss the parallel implementation of a two-level algebraic ILU(k)-based domain decomposition preconditioner using the PETSc library. We present strategies to improve performance and minimize communication among processes during setup …
View article: Parallel Implementation of a Two-level Algebraic ILU(k)-based Domain Decomposition Preconditioner
Parallel Implementation of a Two-level Algebraic ILU(k)-based Domain Decomposition Preconditioner Open
We discuss the parallel implementation of a two-level algebraic ILU(k)-based domain decomposition preconditioner using the PETSc library. We present strategies to improve performance and minimize communication among processes during setup …
View article: Nova implementacao do precondicionador AINV em acelerador NVIDIA utilizando a biblioteca CUSP
Nova implementacao do precondicionador AINV em acelerador NVIDIA utilizando a biblioteca CUSP Open
Comparamos o desempenho em placa gráfica (GPU) do precondicionador AINV baseado na aproximação da inversa. Os resultados de nossos experimentos numéricos e computacionais indicam que nossa implementação é competitiva e possui resultados me…
View article: Metodo de Precondicionamento CPR em Simulacoes de Reservatorio de Petroleo
Metodo de Precondicionamento CPR em Simulacoes de Reservatorio de Petroleo Open
Este trabalho apresenta a implementação, em MATLAB, de um esquema de dois estágios do tipo CPR (do inglês Constrained Pressure Residual) [5], para a resolução de sistemas lineares de grande porte oriundos de simulações de extração de reser…