Estudo da estabilidade local e das bifurcações num sistema polinomial quadrático em ℝ³ oriundo de uma equação escalar de terceira ordem.

Esta Dissertação de Mestrado trata do estudo da estabilidade local e das bifurcações de Hopf genéricas de uma família de equações diferenciais quadráticas em ℝ³ dependentes de três parâmetros reais negativos. Essa família é oriunda de outra família a três parâmetros de equações diferenciais escalares quadráticas de terceira ordem. O estudo da estabilidade dos equilíbrios é feito utilizando-se o critério de estabilidade de Routh-Hurwitz. Utilizamos ainda este critério para a determinação da superfície de Hopf no espaço de parâmetros. Calculamos analiticamente as condições de não degenerescência e transversalidade das bifurcações de Hopf genéricas. Aplicamos os resultados obtidos no estudo de um caso particular conhecido em Teoria de Controle como sistema de Lur'e

GayPod? UM podcast sobre consumo ideológico e a relação da indústria com a comunidade LGBTQIA+

This memoir describes the GayPod? project, a series of podcasts made up of three episodes where the power that the LGBTQIA+ community has with its consumption choices is discussed. Three people were interviewed, who are inserted in the context of the theme, addressing their perceptions about what Pink Money is. This document was presented as a component of the Course Completion Work in Social Communication – Qualification in Journalism, at the Faculty of Communication (Facom) of the Federal University of Bahia (Ufba).Esta memória descreve o projeto GayPod?, uma série de podcasts formada por três episódios onde se discute o poder que a comunidade LGBTQIA+ possui com suas escolhas de consumo. Foram entrevistadas três pessoas, que estão inseridas no contexto do tema, abordando suas percepções sobre o que é o Pink Money. Esse documento foi apresentado como componente do Trabalho de Conclusão de Curso em Comunicação Social – Habilitação em Jornalismo, da Faculdade de Comunicação (Facom) da Universidade Federal da Bahia (Ufba)

Combining inertial-based ergonomic assessment with biofeedback for posture correction: a narrative review

Work-related musculoskeletal disorders (WRMSDs) are the most reported work-related health problem in the European Union, representing an economic burden equivalent to 2% of its gross domestic product. Awkward postures are one of the main risk factors. Several postural assessment tools try to identify ergonomic exposure factors for evaluating WRMSD risk, yet these are commonly based on observation. Replacing observations with objective measurements can bring more accuracy and reproducibility to this analysis; hence, a direct measurement approach for the assessment is desired. This review looks for two-fold solutions, able to not only monitor workers’ posture using inertial sensors but also to return that information to the user, in a biofeedback loop. It presents systems for posture risk assessment, regarding ergonomic methods, sensors’ and actuators’ characteristics, and validation protocols. In particular, this review advances previous manuscripts by exploring the literature regarding different biofeedback strategies and ways to encode meaningful information in the cues, i.e., able to deliver intuitive ergonomic guidance so that the user becomes aware and changes into a more neutral posture. The combination of inertial sensors and vibrotactile motors stood out, due to its effectiveness in reducing postural risk. Directional feedback to guide users’ segments individually was found to be a promising strategy, although its validation is still limited. The results of the reviewed manuscripts pointed out the relevant practices, potentialities, and limitations of the existing solutions, allowing the identification of future challenges.This work was supported in part by the Fundação para a Ciência e Tecnologia (FCT) under the national support to R&D units grant, through the reference project UIDB/04436/2020 and UIDP/04436/2020, and the INTEGRATOR project under Grant 2022.15668.MIT. Sara Cerqueira was supported by the doctoral Grant FRH/BD/151382/2021, financed by FCT, under MIT Portugal Program

Improving Molecular Properties Prediction Through Latent Space Fusion

Pre-trained Language Models have emerged as promising tools for predicting molecular properties, yet their development is in its early stages, necessitating further research to enhance their efficacy and address challenges such as generalization and sample efficiency. In this paper, we present a multi-view approach that combines latent spaces derived from state-of-the-art chemical models. Our approach relies on two pivotal elements: the embeddings derived from MHG-GNN, which represent molecular structures as graphs, and MoLFormer embeddings rooted in chemical language. The attention mechanism of MoLFormer is able to identify relations between two atoms even when their distance is far apart, while the GNN of MHG-GNN can more precisely capture relations among multiple atoms closely located. In this work, we demonstrate the superior performance of our proposed multi-view approach compared to existing state-of-the-art methods, including MoLFormer-XL, which was trained on 1.1 billion molecules, particularly in intricate tasks such as predicting clinical trial drug toxicity and inhibiting HIV replication. We assessed our approach using six benchmark datasets from MoleculeNet, where it outperformed competitors in five of them. Our study highlights the potential of latent space fusion and feature integration for advancing molecular property prediction. In this work, we use small versions of MHG-GNN and MoLFormer, which opens up an opportunity for further improvement when our approach uses a larger-scale dataset.Comment: 8 Pages, 4 Figures - Submited to the AI4Science Workshop - Neurips 202

A cordialidade em Relato de um certo oriente, de Milton Hatoum

Este trabalho tem por objetivo discutir a cordialidade – tal como definida por Holanda (2005) – na composição narrativa de Relato de um certo oriente, de Milton Hatoum. A construção de relações sociais cordiais é notória ao longo da obra. Defende-se que a família libanesa vivencia a cordialidade como uma forma tanto dócil quanto agressiva de engajamento nas relações sociais. Focaremos, em especial, na relação entre Emilie, a matriarca da família, e Anastácia Socorro, a índia que a serviu por toda a vida

First Shiga Toxin-Producing Escherichia coli Isolate from a Patient with Hemolytic Uremic Syndrome, Brazil

Univ Fed Sao Paulo, Escola Paulista Med, Sao Paulo, BrazilHosp Sao Paulo, Sao Paulo, BrazilInst Adolfo Lutz Registro, Sao Paulo, BrazilUniv Fed Sao Paulo, Escola Paulista Med, Sao Paulo, BrazilHosp Sao Paulo, Sao Paulo, BrazilWeb of Scienc