Repositório UFSCar

O Repositório Institucional da UFSCar (RI UFSCar) é um sistema de informação que visa armazenar, preservar, organizar e disseminar amplamente a produção intelectual dos diversos setores e segmentos da comunidade da UFSCar, provendo o acesso aberto à informação produzida na instituição e registrada como científica, tecnológica, didática, artístico-cultural e técnico-administrativa.

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Mulheres, vivências e violências: realidades da beira do rio
(Universidade Federal de São Carlos, 2026-02-27) Costa, Izelma de Souza; Bezerra Neto, Luiz; http://lattes.cnpq.br/4809080593333472; http://orcid.org/0000-0002-6388-3467; http://lattes.cnpq.br/2626204560473380; https://orcid.org/0009-0009-7674-3402; Colares, Anselmo Alencar; Ramos, Géssica Priscila; Mestre, Simone de Oliveira; Amboni, Vanderlei; http://lattes.cnpq.br/1107767923215438; http://lattes.cnpq.br/2573340489166336; http://lattes.cnpq.br/6597882082398090; http://lattes.cnpq.br/9250782741810709; http://orcid.org/0000-0002-1767-5640; https://orcid.org/0000-0002-1254-4510; https://orcid.org/0000-0001-8976-8312; https://orcid.org/0000-0002-7698-4064
Esta investigación, de naturaleza cuantitativa, tuvo como objetivo comprender como se dio el proceso de naturalización de las formas de violencias contra las mujeres reflejadas en comunidades ribereñas en la actualidad. Para tanto, se ha buscado en la literatura, evidencias que aclararan como ese proceso ocurrió históricamente hasta los días actuales. Para la recopilación de los datos fue utilizada la observación y la aplicación de un cuestionario semiabierto a un total de veinticinco participantes entre mujeres y hombres de diferentes componentes curriculares de la enseñanza primaria y enseñanza secundaria del Sistema Organizacional de la Enseñanza Modular en el intento de aclarar si las brechas de formación en educación sexual de profesorado en general influyen en sus prácticas pedagógicas vinculadas al enfrentamiento de las violencias contra mujeres en regiones ribereñas? Para el análisis e interpretación de los datos, se ha buscado sustentación teórica en los fundamentos del Materialismo Histórico Dialéctico, de manera que la discusión de los resultados fue ancorada también en la pedagogía decurrente de este método, esto es, la Pedagogía Histórico-Crítica entrelazada con la literatura feminista y de educación sexual. Los resultados apuntan que el sistema SOME presenta debilidad mientras un sistema educacional de atendimiento a las comunidades ribereñas de la Amazonía amapaense en relación a la falta de regulación própria, a la falta de estructura en las comunidades, además de carencias formativas diversas, principalmente para el enfrentamiento de las formas de violencias contra las mujeres. La consecuencia de esta brecha de formación es la ausencia pedagógica de la educación sexual en las prácticas del profesorado que trabajan en escuelas ribereñas de Amapá, aunque sea notoria la incidencia de todas las formas de violencias ya descritas en las literaturas contra las mujeres en regiones ribereñas. Por eso, está sugiriéndose la educación sexual mientras campo científico capaz de contribuir para la disminución de las formas de violencia contra las mujeres en regiones ribereñas a partir del proceso formativo inicial y continuado en el SOME.
Características de estabilidade e shelf life de cosméticos nanoestruturados: uma revisão
(Universidade Federal de São Carlos, 2026-04-28) Farina, Rafael; Pereira Filho, Edenir; http://lattes.cnpq.br/3394181280355442; http://orcid.org/0000-0003-0608-0278
Nanotechnology applied to cosmetology represents a significant breakthrough in the delivery of active ingredients, seeking to overcome the permeation limitations of conventional formulations. This study aimed to critically analyze, through a qualitative literature review (Web of Science, Google Scholar, and SciELO), the influence of nanostructured systems on the stability and shelf life of cosmetic products. Unlike a generalist approach, the results evidenced that nanostructuring does not inherently provide absolute stability, as these are thermodynamically unstable systems. It was analytically established that solid matrices—such as Solid Lipid Nanoparticles (SLNs) and polymeric nanocapsules—offer superior structural protection against degradation and premature leakage of the active ingredient when compared to fluid systems, such as liposomes and nanoemulsions. In the context of quality control, it was found that the application of stability studies governed by ANVISA guidelines is indispensable, yet insufficient to certify the integrity of nanosystems. Aligning with the FDA's regulatory requirements for nanomaterials, shelf life validation mandatorily requires instrumental monitoring through Dynamic Light Scattering (DLS) and Zeta Potential. In conclusion, although nanotechnology optimizes cosmetic performance, its wide application still faces critical challenges and limitations, notably the gaps in nanotoxicology regarding involuntary systemic absorption, the high cost of characterization, and the severe mechanical obstacles involved in industrial scale-up.
Aprimorando a detecção de Testes Flaky orientados por reexecuções com orquestração de contêineres
(Universidade Federal de São Carlos, 2026-04-01) Lopes, João Victor Lima; Endo, André Takeshi; http://lattes.cnpq.br/4221336619791961; https://orcid.org/0000-0002-8737-1749; http://lattes.cnpq.br/9490984753361156; https://orcid.org/0009-0007-0333-032X; Endo, André Takeshi; Silva, Marco Aurélio Graciotto; Vincenzi, Auri Marcelo Rizzo; http://lattes.cnpq.br/4221336619791961; http://lattes.cnpq.br/9383290036853173; http://lattes.cnpq.br/0611351138131709; https://orcid.org/0000-0002-8737-1749; https://orcid.org/0000-0002-1737-8240; https://orcid.org/0000-0001-5902-1672
Software testing is a primary activity to achieve good quality standards, where developers rely on automated tests to identify and fix software bugs and validate solutions. These tests are sometimes unreliable and present non-deterministic results, such as passing and failing when executing the same code and test several times. This type of inconsistent test is called flaky test. While the literature presents many initiatives to identify flaky tests, rerunning the tests several times remains the primary approach to debugging and analyzing test flakiness. This master’s thesis presents an approach that enhances rerun-driven flaky test detection by applying container orchestration so that flaky tests are detected faster, and more flaky tests are uncovered. To do so, we employ container orchestration technologies like Kubernetes and other tools, like Grafana, Prometheus, and Loki. The proposed approach is instantiated in a tool called FlakyTestLab. We evaluated FlakyTestLab with twenty-eight open source projects, being fourteen in Java and fourteen in Python. Using a High-End computer, FlakyTestLab performs reruns on average 76.93% faster than a baseline, and is 300% faster than the baseline in finding the first failure. FlakyTestLab detected flaky tests up to 143.40% more than the baseline. On the other hand, we observe that the flakiness ratio decreased when FlakyTestLab employed more parallelism.
Busca de compostos bioativos de Himatanthus articulatus e Vismia guianensis para o controle de formigas cortadeiras (Atta sexdens): um estudo Biomonitorado
(Universidade Federal de São Carlos, 2026-02-27) Cruz, Artur da Silva; Fernandes, João Batista; http://lattes.cnpq.br/2691336077459602; https://orcid.org/0000-0002-2924-3327; http://lattes.cnpq.br/1354542326637904; https://orcid.org/0009-0001-3479-5388; Lopes Júnior, Manoel Leão; Amaral, Jéssica Cristina; Almeida, Buana Carvalho de; Bastos, Jairo Kenupp; http://lattes.cnpq.br/1527237878128348; http://lattes.cnpq.br/6610572791860659; http://lattes.cnpq.br/4288032934406331; http://lattes.cnpq.br/0747749432875537; https://orcid.org/0000-0002-4675-6298; https://orcid.org/0000-0002-4509-259X; https://orcid.org/0000-0002-0446-1221; https://orcid.org/0000-0001-8641-9686
Agriculture is one of the most important activities for human subsistence, ensuring the supply of food, fiber, and raw materials. However, its productivity is constantly threatened by several factors, including insect pests. These organisms attack cultivated plants by feeding on leaves, stems, roots, or fruits, which can cause significant losses in both the quality and quantity of agricultural production. Therefore, proper pest management is essential to ensure sustainable harvests and to reduce economic and environmental impacts.Organic compounds from natural products have emerged as promising alternatives in the management of agricultural pests, including leaf-cutting ants, which are among the main insect pests in various crops. These insects cause major damage by cutting leaves and plant parts to cultivate symbiotic fungi, thereby impairing crop development. Unlike synthetic insecticides, plant-derived secondary metabolites such as alkaloids, terpenes, and phenolic compounds exhibit bioactive potential, acting as repellents, toxic attractants, or growth inhibitors. Thus, the study and application of natural compounds represent a sustainable and environmentally safer strategy for controlling these pests.The species Himatanthus articulatus (Apocynaceae) and Vismia guianensis (Hypericaceae) are Amazonian plants of great phytochemical interest due to the diversity of secondary metabolites present in their extracts. H. articulatus, popularly known as “suucuba,” mainly contains iridoids, indole alkaloids, triterpenes, and coumarins, compounds that have been associated with anti-inflammatory, antitumoral, and antiparasitic activities. V. guianensis, traditionally used in folk medicine, is rich in xanthones, anthraquinones, naphthoquinones, and flavonoids, metabolites with recognized antioxidant, antimicrobial, and cytotoxic properties.Using a bioassay-guided (biomonitoring) methodology, it was possible to identify four classes of compounds present in these plants through ethanolic extracts. The species Himatanthus articulatus showed high chemical potential in the study of bioactive compounds against leaf-cutting ants (Atta spp.) and their symbiotic fungus Leucoagaricus gongylophorus. From the crude extract, eight compounds belonging to the class of lactonic iridoids were isolated. Biological assays demonstrated that, at a concentration of 0.1 mg/mL, all iridoids showed significant activity against the symbiotic fungus.In contrast, the extract of Vismia guianensis also showed activity against leaf-cutting ants, enabling the isolation and identification of eight compounds, mainly benzophenones, anthraquinones, and one anthranol. Among these, compound 12 stood out for inducing approximately 60% mortality of the ants within about 10 days of bioassay. Based on this positive biological response, an attempt was made to understand the possible mechanism of action of these metabolites. For this purpose, a homology-based molecular docking approach was employed, suggesting that the activity of the compounds may be related to the inhibition of the enzyme acetylcholinesterase, which is essential for insect neurotransmission.The compounds isolated from Himatanthus articulatus and Vismia guianensis show promising potential for the control of leaf-cutting ants. These results reinforce the importance of natural products as sustainable alternatives to synthetic insecticides.
Manejo da fertilidade em solos degradados e seus efeitos sobre as trajetórias iniciais da comunidade e a plasticidade funcional de espécies nativas na restauração florestal por semeadura direta
(Universidade Federal de São Carlos, 2026-04-08) Mariano, Lucas Florêncio; Silva, Francisca Alcivânia de Melo; http://lattes.cnpq.br/4122016283592995; https://orcid.org/0000-0001-8664-0532; Silva, José Mauro Santana da; http://lattes.cnpq.br/1206055452889306; https://orcid.org/0000-0003-0662-4132; http://lattes.cnpq.br/2371181518788433; https://orcid.org/0000-0002-5258-1105; Piña-Rodrigues, Fátima Conceição Márquez; Dutra, Felipe Bueno; Quadros, Kenia Michele de; Godoy, Leandro José Grava de; http://lattes.cnpq.br/1475369713141675; http://lattes.cnpq.br/2753005636186745; http://lattes.cnpq.br/2209314957208420; http://lattes.cnpq.br/9831205224076878; https://orcid.org/0000-0001-8713-448X; https://orcid.org/0000-0002-6280-7307; https://orcid.org/0000-0003-0873-9582; https://orcid.org/0000-0001-7280-1120
Forest restoration through direct seeding is a low-cost alternative for recovering degraded areas; however, it is often limited by poor initial seedling establishment. This thesis investigated how soil fertility management, through liming and the application of organic and mineral fertilizers, influences the performance, nutrition, and organization of 37 native species in the Atlantic Forest under ecological restoration by direct seeding. Two experiments were conducted: a field experiment evaluating two levels of base saturation (V% = 25% and 50%) and three fertilization treatments (NPK 4-14-8, organic fertilizer - poultry litter, and a non-fertilized control) in soil previously abandoned and invaded by grasses; and a greenhouse experiment testing three levels of base saturation (V% = 3%, 25%, and 50%) and the same fertilization treatments, aiming to assess the nutritional response and plasticity of 13 tree species under degraded cut-slope soil conditions. The results showed that fertility management significantly altered soil chemical attributes, such as pH, exchangeable aluminum, and exchangeable bases, directly affecting species growth and establishment. The combination of liming with organic and mineral fertilization was more effective than isolated applications, promoting greater initial growth and improved community organization. However, responses varied among species, reflecting differences in ecological strategies and plasticity. It is concluded that soil correction and fertilization strategies adapted to species heterogeneity are essential to improve forest restoration success and to promote more resilient and functional communities in the long term.