O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores. 2018 Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais.

Congenital syphilis (CS) remains a threat to public health worldwide, especially in developing countries. To mitigate the impacts of the CS epidemic, the Brazilian government has developed a national intervention project called “Syphilis No.” Thus, among its range of actions is the production of thousands of writings featuring the experiences of research and intervention supporters (RIS) of the project, called field researchers. In addition, this large volume of base data was subjected to analysis through data mining, which may contribute to better strategies for combating syphilis. Natural language processing is a form of knowledge extraction. First, the database extracted from the “LUES Platform” with 4,874 documents between 2018 and 2020 was employed. This was followed by text preprocessing, selecting texts referring to the field researchers' reports for analysis. Finally, for analyzing the documents, N-grams extraction (N = 2,3,4) was performed. The combination of the TF-IDF metric with the BoW algorithm was applied to assess terms' importance and frequency and text clustering. In total, 1019 field activity reports were mined. Word extraction from the text mining method set out the following guiding axioms from the bigrams: “confronting syphilis in primary health care;” “investigation committee for congenital syphilis in the territory;” “municipal plan for monitoring and investigating syphilis cases through health surveillance;” “women's healthcare networks for syphilis in pregnant;” “diagnosis and treatment with a focus on rapid testing.” Text mining may serve public health research subjects when used in parallel with the conventional content analysis method. The computational method extracted intervention activities from field researchers, also providing inferences on how the strategies of the “Syphilis No” Project influenced the decrease in congenital syphilis cases in the territory.

The present work aims to analyze a study on the mechanical response of fiber-reinforced plastics in the presence of geometric discontinuity, as a result of the uniaxial tensile test. The geometric discontinuity is characterized by the presence of a circular hole in the longitudinal section of the composite. In this study, two different types of configurations are tested: one reinforced with glass/E fibers and the other is a hybrid reinforced with glass/E and jute fibers, with and without a hole, aiming to provide a better agreement on mechanical properties, regarding the residual strength. The residual strength determined using normative rules is used in the point stress criterion and average stress criterion failure theories for the semiempirical calculation of distances ( d0 and a0) in the boundary of hole, area of failure stress. The results show the direct influence of the presence of geometric discontinuity and residual strength in all studied parameters since the direction of reinforcement in relation to application of the load is maintained regardless of hybridization.

No abstract

This research is primarily based on the search for alternative natural reinforcements to polymeric composites. This study begins with a complete characterization of the licuri fiber as an alternative reinforcement to polymeric composites. It then investigates the development of a composite laminate made solely from licuri fibers to understand the behavior of the fiber when impregnated in thermosetting resin (orthophthalic unsaturated polyester resin). The composite was developed as a lamina (a sheet with a single reinforcement layer) and industrially manufactured. The fibers were studied to determine their physical, chemical, and mechanical properties. The mechanical properties of the lamina were determined by uniaxial tensile and three-point bending tests. Macroscopic and microscopic (SEM) studies of the fracture were carried out to determine the influence of fiber/matrix interfacial adhesion on the final composite for both loads.