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Efeitos da radiação no mineral zircão: Caracterização via espectroscopia micro-Raman e espalhamento de raios X em pequenos ângulos (SAXS)
(Universidade Federal de São Carlos, 2026-03-10)
Sales, Antonio Said Webbe
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Guedes, Sandro de Oliveira
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https://lattes.cnpq.br/5699746686380656
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Dias, Airton Natanael Coelho
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https://lattes.cnpq.br/7070166380084691
Radiation damage in zircon (ZrSiO₄) fundamentally compromises its reliability as a geochronometer by altering the crystalline structure through accumulation of α-recoil damage from uranium and thorium decay. This thesis presents an integrated investigation of radiation damage assessment, thermal annealing behavior, and nanoscale track morphology in zircon, employing complementary analytical techniques and advanced statistical methodologies to establish robust protocols for Raman-based thermochronology applications. The first component addresses a critical methodological gap in Raman spectroscopy preprocessing for radiation damage quantification. Twelve preprocessing combinations were systematically evaluated across six vibrational modes using 80 zircon spectra from radiation-damaged samples. Performance assessment employed fitting quality metrics and statistical validation with outlier detection protocols, algorithms (polynomial, spline, and comparing three baseline correction iterative AirPLS) combined with four normalization methods (min-max, area, peak, and vector). Results demonstrate that preprocessing effectiveness is highly mode-dependent: the ν₃(SiO₄) symmetric stretching mode at 1008 cm⁻¹ achieved superior fitting quality and precision with Spline baseline correction and Min-Max normalization, while ν₁ and ν₂(SiO₄) vibrational modes performed optimally with Polynomial baseline correction and area normalization. These findings establish standardized preprocessing protocols that enhance inter-laboratory comparability and analytical precision for U-Pb geochronology applications. The second component investigates crystalline recovery dynamics during isothermal annealing of metamict zircon through Raman spectroscopy and advanced statistical modeling. A dataset of 6,225 valid spectral observations was analyzed using Generalized Additive Models (GAM), segmented regression with Differential Evolution optimization, and paired bootstrap methods to test six fundamental hypotheses. Results confirm non-linear model superiority and reveal a two-phase recovery characterized by an initial phase (Stages I-II, 473-840 K) with preferential external mode recovery and higher variability (CV ratio = 1.56), followed by a final phase (Stage III) where SiO₄ tetrahedral modes dominate and variability converges (CV ratio = 0.92). Empirical breakpoints at 607 K and 840 K validate Geisler’s three-stage phenomenological model, while bootstrap analysis reveals non-monotonic behavior in band area ratios with a peak at 622 K. These quantitative constraints provide a foundation for Raman-based low-temperature thermochronology. The third component integrates Small-Angle X-ray Scattering (SAXS) measurements to characterize nanoscale ion track morphology in swift heavy-ion irradiated zircon. SAXS analysis using the hard cylinder model with Gaussian polydispersity yielded track radii ranging from 3.32 to 4.99 nm across seven samples. The correlation between SAXS track parameters and Raman FWHM is not simply linear: the sample with the largest track radius (4.99 nm) exhibits the lowest FWHM (7.38 cm⁻¹), whereas the sample with the smallest radius (3.32 nm) presents a FWHM of 13.05 cm⁻¹, indicating that reduced track radii do not necessarily imply lower vibrational disorder. This behavior reflects the fact that the two techniques respond to structurally distinct aspects of radiation damage — short-range vibrational disorder and physical nanoscale track morphology, respectively — with direct implications for the calibration of Raman parameters in fission track thermochronology. Taken together, the standardized Raman preprocessing protocols, statistical modeling of recovery kinetics, and structural characterization by SAXS offer a starting point for the standardization of Raman-based zircon analysis in thermochronological contexts, although their generalization depends on validation with independent datasets and varied chemical compositions. It should be noted that Transmission Electron Microscopy (TEM), included in the original research scope and reflected in the title, could not be performed due to the non-return of samples sent to the Australian Synchrotron for SAXS characterization, which also precluded the TEM stage; this absence does not affect the results obtained by Raman spectroscopy and SAXS.
Bioética, vulnerabilidades e participação social na avaliação de tecnologias em saúde: uma leitura das decisões da CONITEC em doenças raras
(Universidade Federal de São Carlos, 2026-03-10)
Hanshkov, Viviane
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Silva, Geovani Gurgel Aciole da
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https://lattes.cnpq.br/6146469366214279
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https://orcid.org/0000-0002-6400-8293
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https://lattes.cnpq.br/0325866876028694
This dissertation examines vulnerabilities and public participation in Health Technology Assessment (HTA) processes conducted by the National Committee for Health Technology Incorporation (CONITEC) in the Brazilian Unified Health System (SUS), with emphasis on rare diseases. A total of 83 technical reports issued between 2015 and 2024 were analyzed using a qualitative approach based on documentary analysis, systematic organization of data, and content analysis of contributions submitted during public consultations. The findings, interpreted through the lenses of Science, Technology and Society (STS) studies and bioethics, reveal that the vulnerabilities of patients and family members emerge in multiple dimensions—physical, emotional, social, economic, and related to access barriers—and appear frequently within public consultation inputs. The analysis shows that such vulnerabilities exert a real but not decisive influence on the modification of preliminary recommendations: they enhance the social legitimacy of the process and enrich the understanding of the disease context, but only lead to recommendation changes when aligned with additional clinical evidence, reduced methodological uncertainty, or economic negotiations that make the technology viable for the health system. Thus, economic considerations and the robustness of scientific evidence remain the central determinants of decision-making, whereas vulnerabilities function as interpretive and ethical elements that expand moral sensitivity but do not operate as autonomous criteria. The study concludes that, although public participation within CONITEC has advanced, challenges remain regarding the effectiveness of contributions and the systematic consideration of equity. This dissertation contributes to the STS field by problematizing the social construction of health technology decisions and by reinforcing the need to integrate bioethical principles into policies for rare diseases.
Estudo do perfil químico e da atividade inseticida de Parahancornia amapa no controle de Atta sexdens
(Universidade Federal de São Carlos, 2026-03-10)
Franco, Lulliana
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Fernandes, João Batista
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https://lattes.cnpq.br/2691336077459602
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https://orcid.org/0000-0002-2924-3327
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https://lattes.cnpq.br/2218269668179713
Leaf-cutting ants of the genera Atta and Acromyrmex are important agricultural pests in Brazil, especially in Pinus and Eucalyptus plantations, due to the intense defoliation associated with the cultivation of the symbiotic fungus Leucoagaricus gongylophorus. Although chemical control is widely used, many conventional insecticides exhibit low biodegradability and high environmental impact, which has encouraged the search for alternative control strategies based on natural products. In this context, this study aimed to evaluate the insecticidal potential of Parahancornia amapa (Apocynaceae) in the control of Atta sexdens ants. Metabolites from leaves and bark were extracted using hexane and ethanol. The hexane extract from the leaves and the ethanolic extract from the bark showed significant insecticidal activity. Based on these results, the ethanolic bark extract, which exhibited 70% activity, was selected for bioguided fractionation, initially resulting in a more active methanolic fraction (≈90%). This fraction was subsequently subjected to liquid–liquid partitioning, yielding organic and aqueous subfractions. From the organic subfraction, three compounds previously unreported for the species were isolated and structurally characterized, belonging to the benzopyran class: one pterocarpan, one chroman, and one dimer. The isolated compounds showed moderate insecticidal activity; however, the highest activity was observed for the aqueous subfraction, which exhibited 68% mortality, suggesting a high content of condensed tannins. The comparison among the results obtained for the isolated compounds, the aqueous subfraction, and the original fraction indicated that the most pronounced insecticidal activity is associated with the combined action of the metabolites present in the sample, supporting the hypothesis of a synergistic effect. Additionally, the analysis of the chemical profile of the species by UHPLC-QTOF-MS/MS allowed the annotation of several secondary metabolites, including flavonoids, catechins, coumarins, iridoids, phenolic acids, pterocarpans, lignans, benzopyrans, and terpenes. The results obtained expand the knowledge of the chemical profile of P. amapa, which remains scarcely explored in the literature, as well as its biological potential, highlighting its relevance as a promising source for the sustainable control of leaf-cutting ants.
Investigação empírica dos desafios e oportunidades da construção volumétrica offsite no Brasil: um estudo baseado em survey
(Universidade Federal de São Carlos, 2026-03-10)
Monteiro, Liza Bruna Reis
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Paliari, José Carlos
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http://lattes.cnpq.br/9387796929252598
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http://lattes.cnpq.br/7055627199068148
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Lordsleem Júnior, Alberto Casado
Industrialization in the construction sector aims to enhance efficiency, quality, productivity, and sustainability by adopting industrial production methods. Despite gradual progress in Brazil, the large-scale implementation of industrialized construction - particularly volumetric offsite construction - remains constrained by multiple technical, economic, cultural, logistical, and institutional barriers. This study investigates the main challenges faced by the Brazilian Construction Industry in adopting volumetric offsite construction and identifies viable strategies to overcome them. A Systematic Literature Review was conducted to identify and consolidate the principal challenges reported in the Brazilian context. These findings informed the development of a Likert-scale questionnaire, which was pilot-tested and subsequently administered to professionals across the construction supply chain via survey. The results were analyzed through the Relative Importance Index (RII), enabling the ranking and categorization of challenges. The findings indicate that the most critical challenge categories are Financial (RII = 0.830), Governmental and Regulatory (RII = 0.826), and Cultural and Market-related (RII = 0.804). The highest-ranked individual challenges (RII > 0.80) include the transportation of large-scale modules, cultural resistance, shortage of skilled labor and market experience, lack of tax neutrality, and slow structural and administrative reforms. Proposed strategies to address these barriers include fiscal incentives and specific credit lines, regulatory updates and streamlined licensing, and enhanced technical dissemination, pilot projects, and stakeholder training. The study contributes empirical evidence to support decision-making by public and private stakeholders. It provides strategic guidance to foster the broader adoption of volumetric offsite construction in Brazil, promoting a transition towards more efficient and sustainable construction models.
Análise técnico-econômica e ambiental de biorrefinarias de macroalgas
(Universidade Federal de São Carlos, 2026-03-11)
Kanematsu, Simon
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Cruz, Antonio José Gonçalves da
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https://lattes.cnpq.br/1812806190521028
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https://orcid.org/0000-0001-6830-9512
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https://lattes.cnpq.br/8694905355887445
The development of macroalgae-based biorefineries has emerged as a promising pathway for the sustainable production of biofuels and high-value bioproducts. This thesis evaluates, independently, two industrial-scale routes: cellulose nanocrystals (CNC) production from Sargassum sp. and ethanol production from Kappaphycus alvarezii. The processes were modeled based on the scale-up of experimental data and literature sources, enabling the establishment of mass and energy balances, equipment sizing, and estimation of capital (CAPEX) and operating (OPEX) costs. Economic feasibility was assessed through the Minimum Selling Price (MSP), Net Present Value (NPV), and Internal Rate of Return (IRR), complemented by sensitivity and uncertainty analyses using Monte Carlo simulation, while environmental performance was evaluated following ISO 14040/14044 standards. For CNC production from Sargassum sp., four scenarios were assessed: S1) sap, alginic acid, protein, and CNC; S2) sap, alginic acid, and CNC; S3) sap and CNC; and S4) CNC only. CAPEX ranged from approximately US$113.72 to 141.29 million, while the MSP values were US$14,805.67/ton (S1), US$11,098.54/ton (S2), US$3,521.02/ton (S3), and US$8,546.04/ton (S4). Scenarios with higher product diversification exhibited increased CAPEX without proportional reductions in MSP. The most favorable configuration (S3), focused on CNC and sap production, showed the lowest MSP and best environmental performance. Sensitivity analysis indicated that hydrolysis efficiency, minimum attractive rate of return, and CAPEX are the most critical variables affecting MSP. Uncertainty analysis (95% confidence interval) showed MSP ranges of US$7,694.07-22,102.52/ton (S1), US$5,405.69-16,936.40/ton (S2), US$1,915.80–5,105.39/ton (S3), and US$6,199.59–10,695.37/ton (S4). From an environmental perspective, Life Cycle Assessment (LCA) indicated negative eutrophication potential (EP) values ranging from -0.144 to -0.05 kg PO₄³⁻ eq/kg CNC, associated with nutrient uptake during cultivation, and global warming potential (GWP) values between 1.52 and 10.53 kg CO₂ eq/kg CNC. Independently, ethanol production from Kappaphycus alvarezii was evaluated. The integrated process (including sap, yeast, and carbon credits-CBIOs) presented a CAPEX of US$148 million, IRR of 57.77%, and NPV of US$1,028.69 million. However, ethanol production as a standalone product resulted in a negative NPV (US$-2,003.07 million) and IRR below the minimum attractive rate of return, indicating economic infeasibility. Sensitivity analysis showed strong dependence on sap selling price and biomass throughput, while Monte Carlo simulation indicated a 90.64% probability of positive NPV under integrated conditions. In contrast, LCA results showed highly favorable environmental performance, with negative GWP (-0.6 kg CO₂ eq/kg) and EP (-0.14 kg PO₄³⁻ eq/kg). Overall, macroalgae biorefineries demonstrate strong environmental performance; however, their economic viability is highly dependent on product portfolio and process integration. High-value products such as CNCs improve feasibility, whereas ethanol production requires coproduct valorization, indicating that the main barrier to industrial implementation is economic rather than technical or environmental.
Liberdade individual e obediência às leis: crítica de Isaiah Berlin à teoria política de Jean-Jacques Rousseau
(Universidade Federal de São Carlos, 2026-03-11)
Almeida, Guilherme do Couto de
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Lopes, Marisa da Silva
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https://lattes.cnpq.br/5427042421727621
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https://lattes.cnpq.br/6559530459689554
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Lopes, Marisa da Silva
In The Social Contract, Jean Jacques Rousseau sets out the political principles that govern the existence of the political body born of the social pact. By explicating the concepts of individual will, general will, and the common good, Rousseau maintains that the contracting individual receives his freedom from the pact, grounded in obedience to laws made by the people themselves. This freedom reflects popular sovereignty and the exercise of the general will as the guiding principle of the State and of civil society. The Genevan further qualifies this point by stressing that the associate preserves his individual freedom precisely by ordering his life through submission to the laws he himself has established. The present study aims to refute Isaiah Berlin’s critique of the individual freedom proposed by Jean Jacques Rousseau in The Social Contract. Berlin argues that Rousseau’s conception of freedom is illusory, claiming that the general will, when interpreted as an absolute, can lead to despotism and to the oppression of individual will. This study contends, however, that such criticism rests on a biased interpretation of Rousseau’s theory, especially insofar as it is grounded in a conception of freedom as the satisfaction of one’s own individual interests within the limits imposed by respect for the interests of others (negative liberty). The purpose is to address the core of the tension between individual freedom and collective authority through the lenses of Berlin and Rousseau—a theme that demands analytical precision and a deep grasp of its conceptual nuances. Berlin’s most forceful criticisms of Rousseau will be examined, especially as they concern the possibility that Rousseau’s ideas might conduce to tyranny or serve to justify totalitarian regimes. Accordingly, this dissertation proposes a critical analysis of Isaiah Berlin’s interpretation of Jean Jacques Rousseau’s political theory, specifically Rousseau’s conception of freedom and its implications for the organization of the State. The central hypothesis is that Berlin’s critique, although relevant within the context of twentieth century liberal thought, fails to grasp the complexity and the institutional safeguards present in Rousseau’s system—safeguards that prevent the degeneration of the general will into authoritarianism. More specifically, the research will examine how Rousseau articulates a political model in which genuine freedom is achieved not through the negation of individual will, but through its integration into the general will, expressed in laws collectively enacted. The method employed will consist in an exegesis of Rousseau’s primary texts - chiefly The Social Contract - and of Berlin’s writings, especially “Two Concepts of Liberty,” confronting them with the extensive secondary literature devoted to this controversy. The structure of the work, outlined below, is intended to deepen this analysis, culminating in a systematic response that reaffirms the continuing relevance of Rousseau’s political philosophy for understanding freedom and democratic legitimacy. Finally, the dissertation is grounded in a critical analysis of Rousseau’s works and of contemporary interpretations, seeking to clarify that individual freedom and the general will are not antagonistic, but complementary within the context of political life.
Dados ambientais, espaciais e biológicos da bacia hidrográfica do Rio Pinhal
(Universidade Federal de São Carlos, 2026-03-12)
Cetra, Mauricio
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https://lattes.cnpq.br/6775493342513120
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https://orcid.org/0000-0002-3902-0661
Planejamento de rotas em ambientes dinâmicos: uma comparação entre algoritmos na RoboCup SSL
(Universidade Federal de São Carlos, 2026-03-12)
Barbosa, Gabriel Souza
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Pazelli, Tatiana de Figueiredo Pereira Alves Taveira
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https://lattes.cnpq.br/2574900514697052
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https://orcid.org/0000-0001-9468-6303
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https://lattes.cnpq.br/3939706357282727
This work presents a comparative analysis between classical and incremental path planning algorithms applied to the RoboCup Small Size League (SSL), an environment characterized by high dynamics, multiple robots, and frequent physical interactions among them. In this context, the choice of the path planner directly influences navigation safety, trajectory efficiency, and the overall team performance, which justifies the need for a structured evaluation of different approaches. The algorithms Dijkstra, A*, Lifelong Planning A (LPA*), and D* Lite were implemented and compared, all operating on the same Visibility Graph representation to ensure a common basis for analysis. The experiments reproduce typical game situations involving both static and dynamic obstacles, allowing the observation of how each method responds to varying levels of environmental demands. The evaluation combined qualitative visual analyses and quantitative performance metrics, along with full-match simulations, highlighting clear differences between classical and incremental planners, particularly regarding adaptation to environmental changes and collision occurrence. The results provide a consistent understanding of the advantages and limitations of each approach and offer practical support for selecting path planning strategies in mobile robotic systems operating under dynamic conditions.
A angústia diante da morte: um estudo à luz da psicanálise freudiana
(Universidade Federal de São Carlos, 2026-03-13)
Lima, Bruna Souza de
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Câmara, Leonardo Cardoso Portela
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https://lattes.cnpq.br/0876503068661138
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https://lattes.cnpq.br/3789210665175758
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https://orcid.org/0000-0001-8240-1569
This research aims to investigate and understand anxiety in the face of death in light of Freudian psychoanalytic theory, especially in conjunction with the formulations of the second theory of anxiety. It also seeks to understand how cultural structures mobilize to attribute meaning and manage this type of anxiety. To carry out the investigation, a historical overview of the subject's relationship with death in the West was constructed, as well as an analysis of the development of the notion of anxiety in the face of death in Freud's work. Next, the main metapsychological concepts related to it were explored in depth, namely: anxiety, helplessness, castration anxiety, anxiety in the face of the superego, and the constitution of the superego. The relationship between religion and death is also discussed, examining the origin of religious conceptions based on the experience of helplessness and nostalgia for the father figure, and the relationship between science and anxiety in the face of death, exploring the articulation between the death drive and the destruction drive and the role of science in enhancing the destruction of others through the development of military technologies. It is proposed that anxiety in the face of death is not reduced to an instinctive fear of biological extinction, but articulates psychic dimensions related to helplessness, loss of protection, and the instances that sustain the subject.
Desenvolvimento de método por ICP-MS utilizando AQbD para determinação de impurezas elementares em soluções injetáveis
(Universidade Federal de São Carlos, 2026-03-13)
Viola, Wellington Rogério
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Carneiro, Renato Lajarim
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https://lattes.cnpq.br/8065852319463976
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https://lattes.cnpq.br/6976226340840670
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Silva, Ana Beatriz Santos da
The presence of elemental impurities (EI) in medicines, such as heavy metals, represents a risk to human health due to their high toxicity even at low concentrations, and to ensure patient safety, it is essential to carry out a rigorous assessment of these contaminants. The international guideline ICH Q3D (International Council for Harmonisation Guideline Q3D: Guideline for Elemental Impurities) establishes PDE (Permitted Daily Exposure) limits based on toxicological data and the route of drug administration. In addition, chapters of the USP (United States Pharmacopeia) describe modern analytical techniques, such as ICP-MS (Inductively Coupled Plasma Mass Spectrometry) and ICP OES (Inductively Coupled Plasma Optical Emission Spectrometry), which allow for the detection and quantification of these impurities with high sensitivity, constituting an effective quality control system. In view of the need to identify and control inorganic contaminants originating from raw materials, manufacturing processes, equipment, and packaging in the final product, this work aims to develop a safe and validated analytical method using ICP-MS, through AQbD (Analytical Quality by Design), for the determination of the 24 elemental impurities controlled by the guideline in injectable-matrix pharmaceuticals. To achieve this objective, the ATP (Analytical Target Profile) was defined as a method capable of quantifying IE in injectable solutions, with an average and individual recovery percentage between 70 and 150%, RSD ≤ 20%, discovery curve scanning coefficient ≥ 0.99, and a detection limit greater than 0.2 J μg/L. If the method is capable of quantifying the element at concentrations equal to or lower than 30% of “J”, it may, in some cases, even eliminate the need for continuous monitoring. Next, a cause-and-effect (Ishikawa) diagram was developed with the aim of identifying the potential critical method parameters of the analytical procedure. These parameters were subsequently classified according to their risk using the FMEA (Failure Mode and Effects Analysis) tool, resulting in the selection of four experimental factors with the greatest potential impact on the analytical response: nebulizer gas flow (L/min), plasma power (W), acidity of the diluent solution (% HNO₃), and sample dilution factor. These factors were evaluated at three coded levels (–1, 0, +1), following an experimental design based on a CCD (Central Composite Design), implemented using the statistical software Minitab. The study generated a total of 155 experiments, aiming to model and understand variations in the analytical response resulting from intentional changes in the selected parameters. This approach sought to define the method’s MODR (Method Operable Design Region), within which analytical performance meets the criteria established in the ATP, ensuring robustness, precision, and reliability throughout the method’s lifecycle. The results obtained showed recovery values consistent with the applied spiking levels, falling close to the upper limit of the specification range (100%). Given the robustness, consistency, and analytical performance observed, it was concluded that the parameters defined in the DoE (Design of Experiments) are suitable for adoption as the definitive method, both for constructing analytical calibration curves and for sample preparation, ensuring reliability and reproducibility in subsequent processes.
Traços do tempo: a representação das experiências afro-brasileiras em “Encruzilhada” (2016) e “Angola Janga” (2017), de Marcelo D’Salete
(Universidade Federal de São Carlos, 2026-03-13)
Lima, Gabriela Ferreira
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Medeiros, Priscila Martins de
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https://lattes.cnpq.br/8021362429861754
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https://lattes.cnpq.br/8660100737885511
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Sousa, Karina Almeida de
This research aimed to analyze how the graphic novels Encruzilhada (2016) and Angola Janga: Kingdom of Runaway Slaves (2017), by Marcelo D’Salete, represent the experiences of racism and Black resistance in Brazil. We started from the premise that Black arts and aesthetics in general, and the graphic novels selected here specifically, are important contributions to understanding the social and cultural dynamics that shaped the Afro-Brazilian experience. Our investigation starts from the following sociological problem: in what way and with what tools do the comic books Encruzilhada and Angola Janga: Kingdom of Runaway Slaves, by Marcelo D’Salete, represent the experiences of racism and black resistance in Brazil? More specifically, we sought to: a) sociologically analyze the production process and the meanings of the artistic and narrative choices present in Angola Janga and Encruzilhada; b) explore how the interpretations and meanings deposited by the author in both productions challenge the predominant narratives about Afro-Brazilian history and experiences; and c) investigate how the works Encruzilhada and Angola Janga develop the categories of time and memory to illustrate Afro-Brazilian resistance and struggle. This research adopted a qualitative approach, using iconography and content analysis to explore the visual and narrative elements present in the works. In addition, an in-depth interview was conducted with the author Marcelo D'Salete. Overall, the research demonstrates that Encruzilhada (2016) and Angola Janga: Kingdom of Runaway Slaves (2017) constitute visual counter-narratives that reconfigure the representation of Afro-Brazilian experiences by moving black individuals from the historical condition of objects of violence to the position of agents of memory and resistance. Through aesthetic and narrative choices, D’Salete articulates the past and present, highlighting the continuities of the racist structures of Brazilian society and, at the same time, the strategies of black resistance.
Análise do comportamento e preconceito racial: uma história de pesquisa
(Universidade Federal de São Carlos, 2026-03-13)
Passarelli, Denise Aparecida
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Roche, Bryan
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https://orcid.org/0000-0001-7413-2207
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Rose, Julio Cesar Coelho de
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https://lattes.cnpq.br/3386857761295187
This thesis investigates anti-Black racial bias as symbolic responding organized by social, cultural, and historical contingencies, proposing an integrated research agenda that combines conceptual analysis, evaluation of explicit and implicit measures, and experimental intervention studies. Chapter 1 presents the theoretical framework, defining racial prejudice as relational responding and discussing conceptual and methodological challenges in its measurement and modification. Chapter 2 provides a critical review of empirical research on anti-Black racial bias within Behavior Analysis, identifying gaps that guide the subsequent experimental studies. Chapter 3 focuses on the evaluation of racial bias measures. Study 2, conducted with children aged 8 to 10 years, examined the temporal stability of an explicit valence measure (Likert scale) and the Function Acquisition Speed Test (FAST), an implicit measure, using a repeated-measures design, demonstrating high stability and sensitivity of the FAST to anti-Black racial bias. Study 3, also with children aged 8 to 10 years, employed a multimodal analysis of racial prejudice, identifying a substantial gender effect characterized by the devaluation of Black women, as well as contextual variation in social preference, indicating contextual control of relational responding. Chapter 4 presents intervention studies with children based on the stimulus equivalence paradigm. Study 4, with children aged 8 to 10 years, replicated procedures described by Mizael et al. (2016, 2022), demonstrating the formation of equivalence classes between Black faces and positive stimuli, with reductions in negative relations and valence differences, albeit with limited generalization and social desirability effects. Study 5, with 6-year-old children, showed greater convergence across measures and partial generalization, though without stable maintenance for all participants. In Study 6, using word-based equivalence procedures and longitudinal follow-up, produced more robust generalization effects and evidence of social validity, although changes occurred gradually and heterogeneously, with varying patterns of relational flexibility and resistance to change. A common finding across Experiments 3, 4, and 6 was that the absence of equivalence class formation was associated with the absence of change in racial bias measures. Chapter 5 presents adult study. Study 7, conducted with 116 White Irish adults, evaluated the effects of different FAST-based training configurations on implicit and explicit measures, including a shooter task based on the Police Officer’s Dilemma Task, the Modern Racism Scale, and facial valence ratings. The stereotype-consistent condition exacerbated bias relative to the control condition, whereas the counter-stereotypical and flexibility conditions produced mitigating effects, with the former being the most effective. Overall, this dissertation contributes to a systematic research agenda on anti-Black racial bias, demonstrating that behavioral procedures can reorganize previously established classes while also delineating the possibilities and limits of modifying racial relational control across development and adulthood.
Análise da endogamia das coautorias científicas de pesquisadores da UFSCar credenciados em programas de pós-graduação
(Universidade Federal de São Carlos, 2026-03-13)
Soares, Vinícius Rafael Micali
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Faria, Leandro Innocentini Lopes de
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https://lattes.cnpq.br/0767710394930118
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https://lattes.cnpq.br/1454684702549872
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Faria, Leandro Innocentini Lopes de
The Lattes Platform has established itself as a fundamental database for the production of Science and Technology indicators in the Brazilian context. Aiming to analyze academic inbreeding in the scientific co-authorships of researchers at the Federal University of São Carlos (UFSCar), this research developed an integrated computational procedure capable of coordinating different technologies for the extraction, treatment, processing, and visualization of bibliometric data. The methodology involved automated data collection from the Lattes Platform, metadata treatment through Python scripts, mapping of scientific co-authorship networks using a Java application, and the generation of visualizations with geolocation features. The analyzed dataset comprises 86,341 co-authorship records in full journal articles up to the year 2024, corresponding to 24,612 unique productions, involving 664 researchers from UFSCar – São Carlos Campus accredited in graduate programs, and 7,322 co-authors with professional addresses registered in the Lattes Curriculum. The results confirm the research hypothesis by showing that the developed procedure made explicit the collaboration relationships that are hidden in the standard interface of the Lattes Platform. Evidence indicates a predominance of non-inbred co-authorships and heterogeneity in inbreeding levels according to the unit of analysis, in addition to showing no linear associations between inbreeding and geographical distance. The research demonstrates the effectiveness of the computational procedure for the empirical diagnosis of academic inbreeding and highlights the potential of visualizations for analyzing the dynamics of scientific collaboration from an architectural and interdisciplinary perspective.
Somos mulheres, não somos feministas: a presença digital das deputadas conservadoras e a equidade de gênero (2023-2024)
(Universidade Federal de São Carlos, 2026-03-13)
Rosseto, Lourdes Maria Porto
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Silva, Gleidylucy Oliveira da
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https://lattes.cnpq.br/1871892858720738
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https://lattes.cnpq.br/5701070339884050
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Kerbauy, Maria Teresa Miceli
This research investigates how neoconservative female parliamentarians re-elected in 2022 update their agenda in the digital environment regarding themes related to gender equity following the defeat of President Jair Messias Bolsonaro. The general objective of the study is to analyze how these women instrumentalize female identity as a strategic resource to promote neoconservative political views and delegitimize gender equity policies. To this end, the Instagram profiles of Congresswomen Bia Kicis and Carla Zambelli, both from the Liberal Party (PL), are analyzed during the 2023-2024 biennium. The methodology is anchored in Computational Social Science, employing Natural Language Processing (NLP) techniques, social network analysis, and multimodal qualitative analysis. The results indicate that, contrary to the cooling-off hypothesis, the patriotic and nationalist agenda remains central, strategically merging with family and religion agendas. A division of discursive labor is observed: while Carla Zambelli mobilizes engagement through political and affective maternalism, Bia Kicis operates a strategic legalism to contest democratic institutions. It is concluded that the digital mandate of these parliamentarians instrumentalizes "womanhood" and moral panic as tools for base cohesion and the maintenance of gender hierarchies, adapting resiliently to the opposition context.
Variáveis de proteção para burnout parental: uma investigação quali-quantitativa
(Universidade Federal de São Carlos, 2026-03-13)
Pedroso, Julia Dallasta
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Barham, Elizabeth Joan
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https://lattes.cnpq.br/9868595523538592
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https://orcid.org/0000-0002-7270-4918
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https://lattes.cnpq.br/6718235387859444
Parental burnout is a condition of physical, mental, and emotional exhaustion associated with chronic stress related to parenting responsibilities. Factors such as low social support, coparenting conflicts, and underdeveloped socioemotional skills appear to contribute to its development. This study investigated the relationship between parental, coparental, and marital skills and symptoms of parental burnout, as well as the effects of programs and materials focused on parenting and coparenting. A total of 247 mothers and fathers who had or had not participated in programs or accessed materials on these topics took part in the study. Instruments assessing parental burnout, coparenting relationship, parenting styles, and marital social skills were administered. In addition, 40 participants completed semi-structured interviews about coparenting and parental well-being. The results showed that coparental support and expressiveness and empathy skills predicted lower parental burnout scores. In contrast, coparental conflict, inconsistent punishment, lax discipline, physical abuse, and, surprisingly, assertive conversational skills and proactive self-control predicted higher burnout scores. Differences were also observed in coparenting relationship quality, marital social skills, and parental burnout symptoms between parents who had or had not participated in interventions and accessed parenting-related materials. The interviews highlighted the importance of the coparenting relationship for parental well-being. Despite limitations related to the sample and the diversity of the analyzed programs, the findings suggest that interventions aimed at strengthening coparental, parental, and marital skills may act as protective factors against parental burnout.
Aspectos morfológicos e germinativos de Eugenia velutifolia Mazine & Sobral (Myrtaceae), uma espécie endêmica do Cerrado de São Paulo.
(Universidade Federal de São Carlos, 2026-03-13)
Martins, Isabela Prestes
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Valdemarim, Karinne Sampaio
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https://lattes.cnpq.br/8002996348083277
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https://orcid.org/0000-0002-9564-1163
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Capelo, Fiorella Fernanda Mazine
The Myrtaceae family stands out for its high diversity and ecological importance in the Cerrado, especially the genus Eugenia, which comprises numerous species with ecological significance and economic potential. Eugenia velutifolia Mazine & Sobral is a recently described species (2019), endemic to the São Paulo Cerrado and critically endangered, lacking information regarding its reproductive biology. This study aimed to expand morphological and taxonomic data, re-evaluate its conservation status, and evaluate the species' germination capacity. Fruits were collected in a Cerrado area located in the municipality of Salto de Pirapora (SP), and the collected material (voucher) was deposited in the SORO herbarium at the Federal University of São Carlos (UFSCar), Sorocaba campus. Morphological analyses were based on fieldcollected material and herbarium specimens. The germination test was conducted at the Seedling and Seed Laboratory (LaSem) at UFSCar. The morphological description of E. velutifolia was expanded to include data regarding the bracts, bracteoles, underground system and, primarily, the fruits and seeds, which had been unknown since its original description. The fruits are predominantly rounded, measuring 3.9–13.2 × 4.05–11.7 mm, monospermic, with coloration ranging from yellow to dark purple. The seeds measure 2.95–10.7 × 2,.5–10.5 mm, are light brown, and possess an eugenioid embryo. Germination in E. velutifolia is hypogeal, starting approximately 30 days after sowing. The average germination time is 37 days, the germination success rate was 50.42%, and the germination speed index was 1.97, with variation among parent trees. Seedlings develop over a period of 75 days, which is unusual compared to other species of the genus that exhibit faster development. The endemism and anthropogenic pressure highlight the need for proper management, including propagations protocols, as well as the development of future actions for ex situ conservation to ensure the species' survival.
Mapas auto-organizáveis crescentes para classificação de logs de firewall em fluxos contínuos de dados
(Universidade Federal de São Carlos, 2026-03-13)
Giarini, Wagner Rafael
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Cerri, Ricardo
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https://lattes.cnpq.br/6266519868438512
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https://orcid.org/0000-0002-2582-1695
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https://lattes.cnpq.br/6461896471699749
The exponential increase in data volume and the dynamic nature of computer networks have imposed significant challenges on information security. In this context, classification in Continuous Data Streams (CDS) becomes essential, especially for Network Security Systems (NSS). These applications require techniques that handle memory constraints, processing time, and non-stationary data. This work proposes an adaptation of the Growing Self-Organizing Map (GSOM) for classifying firewall logs in CDS. The GSOM architecture was considered suitable, as it adjusts neuron weights to follow the gradual evolution of patterns and expands its structure to represent new behaviors as they emerge. For evaluation, real data from an operational firewall was used, classified into the actions “Allow”, “Deny”, “Reset-Both”, or “Drop”. The experiments followed an approach with offline (initial training) and online phases, where three update strategies were proposed: (1) nearest winner neuron location, keeping the map fixed; (2) dynamic map expansion, adding new neurons to represent emerging patterns; and (3) refinement of existing neuron weights, adjusting the map without altering its structure. The performance of the GSOM was evaluated in four temporal scenarios, including a combined scenario, and compared with established methods such as Incremental SVM and Adaptive Random Forest (ARF). The comparison established an upper bound of performance for the ideal scenario of zerolabel latency. Although ARF demonstrated overall superiority, its high computational cost and dependence on immediate labeling limit its practical application. It is concluded that GSOM is a viable solution for real-world classification in CDS with infinite label latency, where complete supervision is operationally unfeasible.
Efeito da interação entre microplásticos de filme mulching e pesticida tebuconazol no desenvolvimento do tomate-cereja (Solanum lycopersicum L.)
(Universidade Federal de São Carlos, 2026-03-13)
Sebastião, Glaucia Isabel de Andrade
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Barbosa, Alice Pita
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https://lattes.cnpq.br/3328314264518039
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https://orcid.org/0000-0003-0028-6398
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Waldman, Walter Ruggeri
The increasing use of low-density polyethylene (LDPE) mulching films in agriculture has contributed to rising microplastic contamination in soils, raising concerns about their ecotoxicological effects and their interactions with pesticides. In this study, we investigated four LDPE films with different formulations and degradation levels and found that UV-C photodegradation altered their structural and chemical properties in distinct ways, thereby modifying their sorption capacity. Notably, the degraded silver film showed the highest removal of the fungicide tebuconazole from solution and proved to be the most susceptible to degradation under the conditions tested. In addition, we observed that the incorporation of pristine and degraded microplastics into the soil influenced the early development of cherry tomato (Solanum lycopersicum L.), promoting significant changes in biomass allocation patterns (SLA, SMF, RSR, and LMR), although total growth parameters were not consistently affected. Our findings indicate that, beyond polymer type, formulation and degradation level are key factors governing microplastic–plant interactions. By integrating degradation dynamics, sorption processes, and biological effects, this study advances the understanding of the complexity of these interactions in the environment and highlights the importance of considering chemical diversity and plastic aging in ecotoxicological assessments and environmental modeling.
Biocatalyst engineering applied to the synthesis of fatty xylose esters derived from the C-5 fraction of lignocellulosic residues
(Universidade Federal de São Carlos, 2026-03-16)
Souza, Leonardo de
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Tardioli, Paulo Waldir
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https://lattes.cnpq.br/0808991927126468
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https://lattes.cnpq.br/5597908810221416
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Perna, Rafael Firmani
The growing demand for sustainable, low-environmental-impact surfactants has driven the development of biotechnological routes capable of converting renewable feedstocks into high-value products. In this context, the enzymatic synthesis of xylose fatty acid esters stands out as a promising alternative, particularly due to its potential do valorize the C5 fraction of lignocellulosic biomass, which remains underexploited in industrial applications. However, challenges related to low solubility of xylose, the limited stability of biocatalysts, and reduced catalytic efficiency in non-conventional media still hinder the implementation of these processes. This thesis aimed to develop and evaluate integrated strategies for the enzymatic production of xylose esters, addressing key gaps in biocatalyst engineering, reaction medium selection, and the use of biomass-derived feedstocks. Initially, the state of the art in the enzymatic synthesis of xylose esters was assessed through systematic literature mapping, enabling the identification of recurring strategies, limitations, and opportunities related to catalysts, acyl group donors, solvents, and downstream processing. The results indicated that lipases are the preferred biocatalysts for xylose ester synthesis. Additionally, solvent selection was identified as a crucial factor, with oleic acid, lauric acid, and methyl and vinyl esters being the most commonly employed acyl donors. Subsequently, post-treatment strategies were investigated for the commercial biocatalyst Novozym® 435. The results demonstrated that coating with polyethyleneimine followed by crosslinking with glutaraldehyde yielded more robust biocatalysts, resulting in a 2.3-fold increase in oleic acid conversion when a deep eutectic solvent was used to solubilize xylose, and a 1.5-fold increase when methyl ethyl ketone and tert-butanol were employed. In addition, post-treatment improved operational stability over successive reaction cycles, with approximately 75% retention of catalytic activity after five reuse cycles. A key advancement of this work was the use of a chloride–xylose deep eutectic solvent, which significantly enhanced xylose solubility, reaching concentrations above 600 mM, substantially higher than those observed in conventional organic solvents (7 mM in methyl ethyl ketone and 60 mM in tert-butanol). This increased solubility directly improved enzymatic performance, enabling higher conversion rates and high selectivity toward xylose monoesters. In parallel, the effects of different immobilization protocols and metal modification of the lipase Eversa® Transform 2.0 were evaluated, revealing variations in catalytic activity, thermal stability, and specificity. Spectroscopic analyses confirmed conformational changes in the immobilized enzymes, allowing correlation between immobilization pH and the observed hydrolytic activity and catalytic specificity. Finally, the feasibility of producing xylose esters from sugarcane bagasse was demonstrated through the integration of biomass pretreatment and enzymatic conversion steps. Pretreatment with acetic acid and hydrogen peroxide resulted in a fourfold increase in sugar release during enzymatic hydrolysis with xylanases, compared to untreated bagasse. Biocatalysts prepared by immobilizing Eversa® Transform 2.0 at pH 5 in the presence of 100 mM NaCl, followed by metal modification with MgCl₂, were evaluated. The non-metal-modified biocatalyst exhibited superior performance, achieving 15% oleic acid conversion and 63% xylose conversion. Overall, the modulation of biocatalyst properties through immobilization and post-treatment strategies, the use of deep eutectic solvents in xylose esterification, and the application of xylose derived from sugarcane bagasse significantly advance the field of applied biocatalysis for sugar ester synthesis. This findings provide concrete perspectives for the development of sustainable industrial routes for biosurfactant production.
Quando o meu eu é uma extensão do outro: uma etnografia sobre o assistencialismo prisional da Igreja Universal
(Universidade Federal de São Carlos, 2026-03-16)
Ruiz, Mônica Pereira
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Ohlson, Olof Kjell Oscar
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https://lattes.cnpq.br/4293686059879161
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https://orcid.org/0000-0002-1819-9658
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https://lattes.cnpq.br/3888652607357059
This dissertation analyzes the prison-based social assistance work of the Universal Church of the Kingdom of God (IURD) through its social outreach group “Universal in Prisons” (UNP), active in the Campinas region and surrounding areas. Based on an ethnography conducted among the group’s volunteers, combining participant observation and interviews, it seeks to understand the functioning of UNP through its social practices and the meanings attributed by the participants themselves. Although the literature on the IURD’s social engagement tends to emphasize the theology of spiritual warfare and institutional discourses as key explanatory frameworks, this research prioritizes the volunteers’ perspectives on their own activities, highlighting that the group is composed of individuals who have experienced incarceration, either directly or through the experience of family members and close acquaintances. The findings show that the experience of imprisonment is not limited to a biographical fact, but constitutes a fundamental element in the production of meanings that guide action within UNP, shaping volunteers’ religious and social engagement.