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Investigação da corrosão em revestimentos de óxidos anódicos depositados sobre ligas de alumínio por meio de tratamentos de plasma eletrolítico
(Universidade Federal de São Carlos, 2026-08-21)
Andrade, Fabio Batista Marques de
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Strixino, Francisco Trivinho
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http://lattes.cnpq.br/9740223649776400
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https://orcid.org/0000-0002-0990-0270
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http://lattes.cnpq.br/0496470295696487
Plasma electrolytic oxidation (PEO) was employed to produce oxide coatings on a commercial aluminum alloy using electrolytes containing niobium (Nb), silicon (Si), and tungsten (W). Different anodizing times and initial electrolyte temperatures were evaluated to establish relationships between processing conditions, the morphological, chemical, and structural characteristics of the coatings, and their electrochemical behavior. Characterization was performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), cyclic voltammetry (CV), and potentiodynamic linear polarization (PLP). SEM results revealed differences in layer thickness and morphology, including the formation of pores and microcracks, while EDS confirmed the presence of the incorporated elements. XRD analyses identified various alumina phases and phases associated with the incorporated elements, including WO3 in the tungsten-containing coatings. Polarization tests showed a significant reduction in corrosion current density compared to uncoated aluminum, particularly for the Nb-containing condition obtained at 15 °C for 3600 s. The results demonstrated that PEO coating performance stems from the interplay of composition, crystalline phases, thickness, morphology, and interface characteristics, with anodizing conditions playing a decisive role in achieving superior corrosion protection
Jung, comentador de Freud (1902-1913): contribuições para uma epistemologia da psicologia analítica
(Universidade Federal de São Carlos, 2026-09-01)
Cook, Daniel Donizete
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Maniakas, Georgina Carolina de Oliveira Faneco
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http://lattes.cnpq.br/1207794266426572
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https://orcid.org/0000-0001-9047-5111
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http://lattes.cnpq.br/0727438925782952
This dissertation investigates the period between 1902 and 1913 in Carl Gustav Jung’s intellectual trajectory, focusing on his role as a commentator on Sigmund Freud and highlighting his contribution as an empirical validator of psychoanalysis. Moving away from the traditional historiographical view that casts him merely as a "dissident disciple" of Freud, this research positions Jung as a key collaborator dedicated to establishing the scientific validity of psychoanalysis during its early stages. Structured in three chapters, the work first traces Jung’s medical and psychiatric training, emphasizing his critique of mechanistic materialism and his clinical and experimental experience at the Burghölzli psychiatric hospital under Eugen Bleuler. It then analyzes his partnership with Freud, his theoretical and practical output, and his public defense of psychoanalysis in the face of academic resistance. Finally, the study examines the process of theoretical differentiation that led to the early development of analytical psychology, presenting conceptual divergences regarding the nature of libido - redefined by Jung from an energetic, desexualized perspective - and the introduction of mythological studies. The study concludes that analytical psychology is not a negation of psychoanalysis but rather a critical dialogue that fostered a broader understanding of the unconscious and the psyche.
De eixos a ossos: uma reflexão sobre a jornada de um engenheiro mecânico no curso de medicina
(Universidade Federal de São Carlos, 2026-10-16)
Freitas, Rodrigo Jaccottet
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Reiff, Rodrigo Bezerra de Menezes
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http://lattes.cnpq.br/9676566990095025
This undergraduate thesis is an account of the academic journey of amedical student at UFSCar. According to the guidelines of the program's Political-Pedagogical Plan, the work presents a critical reflection on the narrated events from the graduating student's personal perspective, considering his entire context and past experiences. The narrated events were organized into four moments: The student's background history, Cycle I/Basic, Cycle II/Clinical, Cycle III/Internship. Beyond the course itself, moments of the student's training involving elective activities and an academic league are reported. This narrative is permeated by reflections and critiques, with a final chapter dedicated to an overarching reflection on the course and the author's aspirations regarding his professional future. In conclusion, the overall quality of the UFSCar medical program is emphasized, along with its transformative character—not only due to the course itself, but also because of the experiences it provided—as well as presenting suggestions for improving the course.
CertFix: solução para rotação automática de certificados mTLS para autenticação de microsserviços
(Universidade Federal de São Carlos, 2026-10-27)
Cardoso, Guilherme Silva
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Lucrédio, Daniel
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http://lattes.cnpq.br/9090396559596221
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https://orcid.org/0000-0002-1360-4036
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http://lattes.cnpq.br/9032041229633794
The adoption of microservices expands the attack surface and makes the protection of inter-service communication critical, for which mTLS (Mutual TLS) is one of the most robust mechanisms, as it provides mutual authentication and confidentiality. Its adoption, however, is hindered by certificate lifecycle management, for which manual processes are not scalable and are susceptible to failures, operational errors, and delays. This work developed and empirically evaluated CertFix, an automated mTLS certificate lifecycle management solution with an internal certification authority and a per-host embedded agent that exposes the rotation strategy as an explicit configuration element. The design separates two axes that are often conflated in practice: the algorithm, which orders certificate issuance and revocation operations, and the trigger, either scheduled or driven by a security event. The evaluation followed a controlled Latin square experiment replicated three times, with assignments made by service, over a real mesh of ten microservices under a load of 15 requests per second. The three campaigns totaled 4.4 hours of execution, 212,204 requests, 252 certificate rotations, and 27 fault injections, including the failure of the certification authority, which affected all configurations at the same instant. The gradual strategy sustained rotation without ever leaving the service without a valid credential: measured at the certification authority, coverage was continuous, with an exactly zero invalidity window in all 14 cells attributable to the strategy itself, out of the 18 in the design. The maintenance-window strategy failed in all 18 of its cells, event triggering in all 16 of its cells, and the manual procedure in 9 cells. The denominators differ because the cell whose gap was opened by the preceding strategy, in the discarded transition, is excluded from the strategy that inherited it. Under fault injection, measured against paired control windows without faults, the gap for the gradual strategy remained zero across the three scenarios, and it was the only strategy that retained rotations rather than completing them when the service was terminated, whereas neither of the two window-based strategies did so. The difference between the two orderings, however, is invisible in the metric that would naturally be used to evaluate them: rotation success rate assigned 100 % to all four strategies, 238 out of 238 rotations verified by serial-number matching, both to the strategy that never left the service uncovered and to those that did so in every measured cell. Thus, the central contribution is the empirical observation that the benefit of automation stems from the ordering between issuance and revocation, rather than from automation itself. It is a decision that established tools leave implicit, that conventional rotation metrics fail to reveal, and that the evaluated manual script, which follows the same order as the maintenance window, did not avoid either.
Ìrantí uma caixa de memórias: percepções de famílias sobre a educação das relações étnico-raciais na educação infantil
(Universidade Federal de São Carlos, 2026-08-21)
Silva, Ayodele Floriano
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Cruz, Ana Cristina Juvenal da
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http://lattes.cnpq.br/6736396213946663
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https://orcid.org/0000-0002-8401-376X
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https://lattes.cnpq.br/6226777080239979
This thesis investigates how families of Early Childhood Education children perceive the Education for Ethnic-Racial Relations (ERER) that reaches them through the school, the child, and their own trajectories. The aim is to understand the perceptions of three families about the ERER practices developed in a preschool class of a Municipal Early Childhood Education Center in São Carlos-SP, recognized for an outstanding ERER practice in 2024, identifying the concept of ERER these perceptions approach, the elements that mediate them, and the dispositions that organize them. Qualitative in nature and exploratory in character, this research is configured as an instrumental case study and combines documentary analysis of the Political-Pedagogical Project and of the pedagogical documentation with three semi-structured interviews with the mothers. The findings show that each family's perception results from the encounter between the practice developed at school, which reaches families through the mediation of the children and the figure of the teacher, and the moral, affective, religious, and experiential dispositions and the racial position each family already carried. Families recognize ERER above all as a work of values of coexistence, respect for difference, and belonging, its formative dimension, whereas the dimension of structural transformation operates in another register. Each family's racial position shapes what is perceived and makes the demand for participation plural. It is concluded that including families is a criterion of quality of ERER in Early Childhood Education, and that listening to them is a condition for shared work.