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Modelos de sobrevivência induzida por fragilidade da família PVF: uma abordagem bayesiana
(Universidade Federal de São Carlos, 2026-03-27)
Pedraza, Carlos Franklin Taco
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Opazo, Miguel Angel Uribe
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https://lattes.cnpq.br/4179444121729414
;
https://orcid.org/0000-0001-8937-4815
;
Cancho, Vicente Garibay
In survival analysis, it is common to incorporate covariates such as age, sex, disease severity, among others. However, there are several unobserved factors that may also influence survival, including overall health status, lifestyle, occupation, or genetic predisposition. Such factors are often referred to as frailty and represent unobserved heterogeneity among individuals in the study. The objective of this work is to develop frailty models capable of capturing this unobserved heterogeneity in survival data. We introduce a new class of survival models that combines population unobserved heterogeneity and the presence of cured individuals through the incorporation of frailty terms from the PVF family (Power Variance Functions), referred to as PVF-Induced Defective (PVF-ID) models. This framework extends the classical theory of frailty models and defective lifetime models, allowing researchers to flexibly model the presence of long-term survivors. Inference is performed through a fully Bayesian procedure implemented via Hamiltonian Monte Carlo, while relevant frequentist properties are assessed through simulation studies. When applied to survival data related to HIV/AIDS, the model consistently identifies the effects of the covariates. Additionally, a bivariate survival model with cure fraction and frailty is proposed, based on Poisson mixtures and the PVF family. The model is extended to a regression framework, allowing the assessment of covariate effects on survival times. Inference is conducted under a Bayesian approach using Hamiltonian Monte Carlo implemented in RStan, and simulation studies are carried out to evaluate the performance of the estimators. The flexibility of the proposed structure allows the model to capture both dependence between failure times and unobserved heterogeneity. The practical utility of the model is illustrated using a real dataset.
Caracterização de superfícies texturizadas por vibração: análise de parâmetros de rugosidade e molhabilidade
(Universidade Federal de São Carlos, 2026-03-27)
Moraes, Alvaro Araujo de
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Antonialli, Armando Ítalo Sette
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https://lattes.cnpq.br/4367459395417045
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Moreira, Debora Carneiro
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https://lattes.cnpq.br/4361739459398814
Surface engineering has become an essential field for understanding how topographical characteristics influence the functional performance of materials in different applications, such as heat exchangers. Therefore, investigating the relationship between manufacturing parameters, machining vibrations, and variations in surface roughness parameters has attracted increasing scientific and technological interest. In this context, vibrations induced by actuators or inherent to machining processes can significantly alter surface morphology, resulting in surfaces with distinct characteristics depending on the process conditions. Thus, the present work aims to characterize flat machined surfaces of aluminum, brass, and stainless steel produced through turning and milling processes under different machining conditions, with emphasis on the analysis of roughness and wettability parameters. The characterization of the surface topology of the samples was carried out using confocal microscopy, evaluating the parameters of average roughness (Ra), skewness (Rsk), and kurtosis (Rku). Wettability analyses were performed using an optical tensiometer, enabling measurements of static, advancing, and receding contact angles, with distilled water used as the working fluid. The results obtained from turning indicated that, for all analyzed materials, samples produced under more severe machining parameters exhibited higher contact angles compared to surfaces manufactured under milder conditions. In contrast, the opposite behavior was observed for aluminum samples produced by milling, where higher contact angle values were associated with the higher speed condition corresponding to unstable machining. Overall, a consistent association was observed between the behavior of the skewness parameter and static contact angles, since in several cases where skewness varied, variations in static contact angle were also observed. These results contribute to the understanding of the influence of vibrations on the topographical characteristics of machined surfaces, supporting the correlation between manufacturing conditions, surface roughness, and wettability.
Concepções de controle dos frigoríficos brasileiros: uma análise sobre a JBS, Marfrig e Minerva
(Universidade Federal de São Carlos, 2026-03-27)
Souza, Pedro Henrique de
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Candido, Silvio Eduardo Alvarez
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https://lattes.cnpq.br/0194644249955417
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https://orcid.org/0000-0002-5275-6577
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https://lattes.cnpq.br/7691056908112326
This paper analyzes the transformations in the conceptions of control of the main companies in the Brazilian meatpacking companies: JBS, Marfrig, and Minerva, addressing how their strategies and management models were reconfigured in the context of the sector's consolidation and the financialization of the economy. The theoretical framework is based on Fligstein's economic sociology, especially the notion of conceptions of control. It engages with the literature on financialization and the Varieties of Capitalism approach, situating the Brazilian case within its specific institutional arrangement. It starts from the premise that conceptions of control express internal power dynamics within companies and their position in a field marked by disputes, state mediation, and market pressures. Methodologically, a multiple case study approach was adopted, analyzing the trajectory of the companies based on documentary analysis of corporate reports and corporate documents from 2007 to 2024. The investigation focused on dimensions such as acquisitions and mergers, shareholding composition, capital structure and leverage, profiles of the board of directors and management boards, and dividend distribution, allowing for a processual understanding of organizational transformations. The results indicate that the expansion of the companies, which became dominant in the national market and protagonists in the global protein trade, was driven by growth strategies via mergers and acquisitions, financed by leveraged capital structures and access to the stock market. The initial public offering (IPO) represented a turning point, redefining performance criteria and expanding the influence of institutional investors. A progressive professionalization of management and a reconfiguration of the role of the founding families were observed, in an environment increasingly driven by financial metrics. In terms of control concepts, the consolidation of shareholder value orientation was identified as the dominant principle throughout the analyzed period. The dynamics of the sector thus reveal a field of strategic action in which the State, companies, and investors interact, highlighting a hybrid form of financialization in Brazilian capitalism. It is concluded that the transformations in the conceptions of control of these corporations express broader changes in the organization of agro-export capitalism in Brazil, contributing to a critical understanding of financialization in emerging economies and its effects on governance and business action.
A nossa luta é essa: uma etnografia com as lutas de moradores(as) removidos(as) pelo Programa de Urbanização de Favelas numa área entre a favela de Heliópolis e São João Clímaco
(Universidade Federal de São Carlos, 2026-03-27)
Guidotti, Marcos Vinícius Silva
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Villela, Jorge Luiz Mattar
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https://lattes.cnpq.br/8301325600502054
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https://orcid.org/0000-0001-5240-4654
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https://lattes.cnpq.br/6165756473470045
In this research, conducted in the area of the Heliópolis favela and the São João Clímaco neighborhood (southern zone of São Paulo), an ethnographic study was carried out on the effects of the national policy of recent decades aimed at combating precarious settlements – understood from the development of the Favela Urbanization Program – specifically its housing and social interventions. To achieve this objective, the thesis is structured into five chapters that articulate theoretical, documentary, and ethnographic analysis. The first chapter ethnographically reconstructs the formation of the field of urban studies, demonstrating how the central lens defining favelas as spaces of precarious housing was consolidated, focusing on the theoretical/discursive bases that would later be assimilated by the national public housing policy studied. The second chapter specifically examines the transition of this alignment between the theory of urbanization (of large cities) and housing policies, analyzing the theoretical-political fold through which the critical diagnosis of the unequal city – forged in the struggles against the military dictatorship – was converted into housing management technology, focusing on the description of how this academic knowledge underpinned the national policy to combat precarious settlements in urban Brazil (materialized in the Favela Urbanization Program). The third chapter introduces the ethnographic perspective of the research field, describing the historical action of residents who formed the local social movement in the Heliópolis region and their influence on the territorialization of the Favela Urbanization Program's intervention, explaining how local housing struggles were both recognized and resignified by the Program. The fourth chapter complicates this understanding by presenting other voices, knowledges, and housing arrangements that escaped the standardizing planning of the Favela Urbanization Program, pointing to the diversity and complexity of the ways of living in the favela that were obscured by the housing intervention studied. Finally, the fifth chapter focuses on the concrete experience of removal and waiting resulting from the intervention, detailing ethnographically how the lives of residents of the studied area were transformed by forced displacement, dependence on housing assistance programs, and prolonged uncertainty regarding the housing promised with the development of the Favela Urbanization Program; which, according to statements gathered in the research, produced a new form of vulnerability. The research, based on intensive fieldwork and bibliographic and documentary research, made it possible to confront the official project of the city with the understandings of struggle held by the population objectified by that project. The thesis concludes that urban interventions such as the Favela Urbanization Program, by ignoring the complexity, history, and disputes inherent in the ways of living in favelas, not only fail to solve housing problems but often intensify them, demanding from favela residents constant reinventions of their struggles for the right to housing and to live in the city.
Trajetórias políticas e o perfil das vereanças em Sorocaba/SP.
(Universidade Federal de São Carlos, 2026-03-27)
Tomoto, Thiago Hideo
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Alves, Mariana Faiad Batista
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https://lattes.cnpq.br/3951073428352583
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Santos, André Cordeiro Alves dos
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https://lattes.cnpq.br/2131880667704281
Analyzing institutional politics in Brazil requires an examination of its past as a means to understand the present and envision possibilities for "other futures." It is fundamental, therefore, to recover the profiles of representatives who have occupied decision-making spaces and to identify the interests and objectives that permeated the sphere of institutional political representation. Consequently, understanding the profiles of city councillors (vereadores) in Sorocaba/SP, within a timeframe beginning in 1948, constitutes the central object of this thesis, which seeks clues to understand institutional political dynamics.The focus on Sorocaba’s local legislature is configured not merely as a research possibility, but as a recovery of the author's own political trajectory within the city. This lived experience becomes an investigative tool intertwined with scientific research, structured under rigorous sociodemographic analysis, fieldwork, and theoretical foundation. Thus, examining the locality from this perspective serves as a strategy to identify potential generalizations that assist in understanding electoral dynamics at state, national, and global levels. The recovery of these dynamics at the territorial level allows for an understanding of the vestiges of the roots that forge the relations between representatives and the represented. The identification of phenomena such as coronelismo (colonelism), mandonismo (bossism), and clientelism - and their developments through the lenses of the "legislator," the "procurer," and the "welfare provider" - comprises the framework chosen by the author to categorize, based on semi-structured interviews, the councillors elected for the first time in the 2024 elections. Furthermore, this study seeks to demonstrate how this modus operandi perpetuates itself, alongside the hypothesis of an emerging new group, termed by the author as the "personalist" group. This profile does not necessarily maintain a bond with the territory, a party project, or a political party; rather, it fosters a direct identification with the voter through themes that transcend local jurisdiction and the traditional role of the councillor, mediated primarily by social networks. Finally, the study reflects upon the profiles of councillors in Sorocaba/SP, emphasizing variables such as gender, race, religion, and marital status, in search of investigative evidence on how these new profiles may reorganize the dynamics of institutional politics.
Caracterização bioquímica e funcional de F-box like proteins em Leishmania infantum
(Universidade Federal de São Carlos, 2026-03-27)
Regatieri, Wesley Klaysson Pereira
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Teixeira, Felipe Roberti
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https://lattes.cnpq.br/3568850159381693
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https://lattes.cnpq.br/8184041108175983
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https://orcid.org/0000-0003-1004-9708
A proteólise intracelular em eucariotos é mediada principalmente pelo Sistema Ubiquitina–Proteassoma (SUP), que envolve as enzimas E1, E2 e E3, sendo estas últimas responsáveis pelo reconhecimento dos substratos. Em protozoários parasitos, como Leishmania infantum, o SUP é essencial para adaptação ao ciclo de vida e sucesso do parasitismo, embora ainda seja pouco explorado, especialmente as E3 ubiquitina-ligases. Este estudo teve como objetivo caracterizar bioquimicamente e funcionalmente as proteínas F-box-like LinfFlp2 (LINF_240015400) e LinfFlp3 (LINF_150014400), adaptadores da E3 ubiquitina ligase LinfCRL1 de L. infantum. Parasitos expressando LinfFLP2-HA e LinfFLP3-HA foram submetidos à imunoprecipitação seguida de espectrometria de massas para identificação de proteínas associadas. Os interactomas revelaram 44 proteínas exclusivas para LinfFlp2, 125 para LinfFlp3 e 106 proteínas compartilhadas nos interactomas de LinfFlp2 e LinfFlp3, sugerindo redundância funcional. Para validação das interações em células HEK293T, os genes Replication protein A subunit (LINF_280024500), RNA-binding protein 29 – putative (LINF_180007200), Leucine-rich repeat protein – putative (LINF_340011100) e Putative mitochondrial carrier protein (LINF_020012000) foram clonados em vetores para expressão em células de mamíferos em fusão com myc no N-terminal. Ensaios de co-imunoprecipitação demonstraram que a proteína LRR é um potencial ligante de LinfFlp3. Em L. infantum, demonstramos através de CRISPR-Cas9 que as linhagens nocaute de LinfFLP2 não resultou em impacto no crescimento promastigota, enquanto não foi possível obter o nocaute completo de LinfFLP3, sugerindo caráter essencial. A inserção de uma cópia de LinfFLP3-HA no locus 18S ribossomal do parasito e posterior nocaute das duas cópias genômicas resultou em linhagem viável (DKO-LinfFLP3-HA), reforçando a essencialidade deste gene para L. infantum. O nocaute de uma das cópias do gene SKO LinfFLP3, DKO-LinfFLP3-HA e LinfFLP2-HA não apresentou alteração significativa de crescimento e não observamos alteração nas fases do ciclo celular das linhagens SKO-LinfFLP3 ou DKO-LinfFLP3-HA. Finalmente, análises de microscopia confocal demonstraram que LinfFlp2 e LinfFlp3 apresentam distribuição predominantemente citoplasmática granular e perinuclear com sutil localização nuclear. Em conjunto, os dados sugerem redundância funcional entre LinfFlp2 e LinfFlp3, ampliando a compreensão das LinfFlps na biologia de L. infantum.
Capacidade resistente de vigas celulares mistas de aço de alta resistência e concreto à instabilidade no montante da alma
(Universidade Federal de São Carlos, 2026-03-27)
Ferreira, Lucas Gomes
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Ferreira, Felipe Piana Vendramell
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https://lattes.cnpq.br/5933034803347448
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https://orcid.org/0000-0001-8007-789X
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Nardin, Silvana de
This study aims to investigate the resistance capacity of high-strength steel composite cellular beams with concrete slabs against web-post buckling. To this end, nonlinear geometric and material analyses were performed using the ABAQUS® software. The numerical model was validated against experimental data from physical models of composite cellular beams with concrete slabs. Four reference models were used as a basis for a parametric study carried out in two stages. In the first stage, the influence of the steel yield strength was investigated for S460, S690, and S960 steels (with yield strengths of 460 MPa, 690 MPa, and 960 MPa, respectively), without geometric variations. In the second stage, variations in steel strength were combined with variations in the following ratios: the opening diameter to the unexpanded steel profile height (Do/d), taking values of 0.8, 0.9, 1.0, and 1.1; and the center-to-center spacing to opening diameter ratio (p/Do), taking values of 1.2, 1.3, 1.4, and 1.5. For the variations of the validated symmetric profile models, CCB1 from Nadjai et al. (2007) and CCB3 from Müller et al. (2006), as well as the asymmetric model CCB2 (asymmetry ratio of 1.13) also from Nadjai et al. (2007), web-post buckling remained the predominant failure mode across all steel grades during the first stage, with maximum strength gains ranging from 24.6% to 60.8% for S690 and from 54.0% to 83.4% for S960. For variations of model CCB4, also from Müller et al., (2006), which has a top-to-bottom tee asymmetry ratio of 2.8, only local web buckling of the top tee was observed in the first stage, regardless of yield strength, with strength gains of 28% for S690 and 68% for S960. In the second stage, increasing Do/d tended to reduce the maximum strength, while increasing p/Do generally increased it, although complex interactions between geometry and steel yield strength were observed. For the CCB1, CCB2, and CCB3 variations, as steel strength increased, failure modes shifted toward those involving the formation of Vierendeel plastic mechanisms, either in isolation or combined with web-post buckling. For the CCB4 variations, the failure mode shifted from pure local web buckling of the top tee to an interaction between this failure mode and the Vierendeel plastic mechanism. The numerically obtained maximum strength values were compared with four analytical verification models: Panedpojaman et al. (2014), Grilo et al. (2018), AISC Steel Design Guide 31 (2016), and BS EN 1993-1-13 (2024). The comparison shows that most formulations underestimate the maximum resistance capacity of high-strength steel–concrete composite cellular beams. When analyzing the effect of increasing steel yield strength on maximum strength, the AISC Steel Design Guide 31 (2016) method showed an increase in the F_numerical/F_analytical ratio, while the other methods showed a decrease in this ratio as strength increased. Furthermore, all methods exhibited high coefficients of variation, often exceeding 40%, indicating high relative data dispersion. This level of variability compromises the reliability of predictions for high-strength steels, suggesting that current formulations do not adequately capture the instability and plastification phenomena in composite cellular beams with high-strength steel profiles.
Avaliação da contaminação por microplásticos no processo produtivo de queijos
(Universidade Federal de São Carlos, 2026-03-27)
Avancini, William Faneca
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Waldman, Walter Ruggeri
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https://lattes.cnpq.br/0616238673458322
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https://orcid.org/0000-0002-7280-2243
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https://lattes.cnpq.br/2215613043098121
The detection of microplastics in dairy matrices presents complex analytical challenges due to the density of lipids and proteins. Given these technical limitations, this research shifted the investigative focus from end-product analysis to mapping vulnerabilities within the production process. The objective of this study was to identify and evaluate critical points of microplastic contamination in the cheese manufacturing chain using a qualitative and descriptive approach. The methodology consisted of a comparative case study involving industrial units in Brazil and three strategic hubs in the European Union: the Netherlands, Spain, and Italy. The results allowed for the categorization of risks based on mechanical, thermal, and chemical stresses of polymers in contact with food. It was identified that extreme automation (Netherlands) and pressing time (Spain) are relevant vectors, but the highest criticality lies in industrial slicing and grating (Italy), where the increased plastic-to-food contact area enhances physical migration. The study concludes that the Brazilian regulatory framework presents a "blind spot" by focusing primarily on chemical stability while neglecting the physical degradation of equipment. The adoption of preventive replacement protocols for polymeric materials is recommended to mitigate the accidental ingestion of microparticles by consumers.
Uso do condicionamento operante como ferramenta de conservação ex-situ em instituições brasileiras
(Universidade Federal de São Carlos, 2026-03-27)
Moraes, Caroline Rodrigues de
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Schlindwein, Marcelo Nivert
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https://lattes.cnpq.br/9690898537150950
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https://orcid.org/0000-0001-8174-5941
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https://lattes.cnpq.br/1785412307114204
Operant conditioning has become established as a strategic tool in the management of wild animals kept in ex situ conservation programs. This study investigated the practical application of operant conditioning in Brazilian institutions (zoos, wildlife triage and rehabilitation centers, breeding facilities, among others), analyzing the profile of training protocols, their purposes, and the technical limitations faced. The methodology consisted of a literature review and the application of a diagnostic form, preceded by a pilot study to validate and refine the instrument, which was subsequently applied to 201 institutions, of which 29 responded (30 including the pilot).The results indicate that operant conditioning is widely used in Brazilian ex situ conservation institutions, being implemented in 70% of the participants and under development in an additional 16.7%. Its application is mainly concentrated on large mammals and birds, particularly felids, primates, and psittacine, revealing marked taxonomic selectivity to the detriment of reptiles and invertebrates. Operant conditioning is primarily employed to facilitate daily and veterinary management, promote animal welfare, and reduce the need for physical and chemical restraint, with a predominance of positive reinforcement techniques. Although most institutions report having trained professionals, the lack of specialized technical training and the absence of systematic behavioral assessments, such as the use of ethograms, represent significant limitations. It is concluded that, despite its strong potential as a management and conservation tool in Brazil, operant conditioning still requires greater technical standardization and broader taxonomic application to be consolidated as a robust strategy for animal welfare, rehabilitation, and wildlife release.
A ética do amor como dimensão do cuidado em Terapia Ocupacional
(Universidade Federal de São Carlos, 2026-03-28)
Gabarra, Leonardo Lima
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Silva, Carla Regina
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https://lattes.cnpq.br/6417501858864106
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https://orcid.org/0000-0002-7079-8340
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https://lattes.cnpq.br/3799784387963001
The present study investigated the ethics of love and its inseparability from occupational therapy care. Far removed from romantic or charitable meanings, love is understood as a feeling-action with political and transformative power, capable of confronting the violence and oppression that permeate subjects and populations historically marginalized. The research analyzed interviews with occupational therapists, interpreted through thematic analysis. Two themes emerged, demonstrating how loving practices strengthen relationships, promote objective and subjective transformations—both individual and collective—and sustain the struggle against violence present in the lives of individuals and communities. Although recognized as essential, love remains stigmatized and is often associated with fragility or seen as incompatible with technique and professionalism. The results indicate that it must be assumed as an ethical and political force, capable of fostering horizontal relationships, affirming diversity, and resisting oppressive logics. In Occupational Therapy, the ethics of love appears as a condition for humanized and transformative care, shifting professional practice away from rigid protocols toward actions committed to life, dignity, and social justice. To embrace it as an ethic transversal to the caring professions is to affirm its collective, community-based, and liberatory dimension. “Politics of love” thus become an inspiration for sustaining the well-being of all beings—human or non-human—and for recognizing care as a practice of freedom.
Uma análise de memes ofensivos e de cunho político no contexto da eleição brasileira de 2022
(Universidade Federal de São Carlos, 2026-03-30)
Lopes, Leandro de Oliveira
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Iasulaitis, Sylvia
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https://lattes.cnpq.br/4226275371443693
;
https://orcid.org/0000-0002-3526-1003
;
https://lattes.cnpq.br/1685606169755410
This dissertation analyzes 400 offensive political memes shared during the 2022 Brazilian electoral period on the social media platform X (formerly Twitter). In addition to investigating the discursive dynamics present in these contents, the study proposes a methodological update for the analysis of offensive political memes by incorporating specific categories of political attack into the taxonomy traditionally used in this type of research. The objective is to understand how these memes, particularly those focused on the Brazilian political scenario, seek to validate their respective ideologies by discrediting opponents and delegitimizing opposing discourses through offense. The research considers memes as multimodal discursive and cultural artifacts embedded within the context of contemporary digital culture and, at the same time, is grounded in an Information Science perspective that understands information as a thing, treating memes as documents. From this perspective, memes cease to be merely ephemeral content and instead become evidence of knowledge, values, and cultural and political practices shared by social groups. Initially, a theoretical review was conducted tracing the shift in the concept of the meme from its origins in memetic theory to its appropriation by communication and digital culture studies in the form of called internet memes. Following this review, the characteristics of the database used were presented, and the curation procedures guiding the analytical construction were described, including the stages of classification and cataloging of the memes. For the analysis, a typological content model was initially adopted, classifying political memes according to three main categories subdivided into twelve subcategories. The empirical analysis, however, revealed limitations in this taxonomy when it became necessary to capture certain forms of attack present in the corpus. In response to this limitation, the research proposed an update to the analytical model, incorporating new categories related to political attack strategies, namely accusation, morality, fake news, and violence. The results demonstrate significant discursive differences between the political spectrums analyzed: while memes associated with the left tend to concentrate on strategies of ridicule, political humor, and symbolic moralization, memes linked to the right show a higher incidence of accusation and content classified as fake news. This expansion makes it possible to refine the analysis of offensive political memes, more accurately understand the discursive dynamics involved in the circulation of such content in digital environments and offer methodological contributions for future studies on digital political communication, participatory culture, and meme analysis.
Trajetórias escolares de alunos surdos e/ou com deficiência auditiva na educação básica: um estudo longitudinal de 2008 a 2023 no município de João Pessoa
(Universidade Federal de São Carlos, 2026-03-30)
Fernandes, Francyllayans Karla da Silva
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Schneider, Gabriela
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http://lattes.cnpq.br/7221139835915668
;
https://orcid.org/0000-0002-6346-2849
;
Lacerda, Cristina Broglia Feitosa de
This dissertation analyzes the materialization of national educational policies aimed at ensuring access, retention, and completion of Basic Education for deaf students and/or students with hearing impairment in the municipality of João Pessoa, Paraíba, Brazil, from 2008 to 2023. The study is grounded on the assumption that, although the Brazilian legal framework has significantly advanced in recognizing the educational rights of this population especially through the strengthening of inclusive education and bilingual education perspectives structural and institutional challenges continue to limit the effective implementation of these rights throughout students’ educational trajectories. The guiding research problem seeks to understand how inclusive and bilingual policies have contributed, in terms of access, retention, and completion, to the educational trajectories of thirteen cohorts of deaf students enrolled in Basic Education in João Pessoa (PB) in 2008 and followed until 2023. The general objective was to analyze these students’ educational trajectories, identifying patterns of regularity, irregularity, and interruption, as well as the impacts produced by educational policies throughout the period under investigation. Methodologically, this is a quantitative longitudinal study based on the analysis of microdata from the School Census produced by the National Institute for Educational Studies and Research Anísio Teixeira (Inep). Enrollment tracking was conducted through the Protected Data Access Service (Sedap), enabling the individual monitoring of 183 students identified as deaf and/or with hearing impairment, distributed across thirteen cohorts, from Early Childhood Education to the third year of Upper Secondary Education. The variables analyzed included promotion, grade repetition, dropout, migration to Youth and Adult Education (EJA), and completion of Basic Education. The typologies of educational trajectories regular, slightly irregular, highly irregular, and interrupted were developed based on the proposal by Souza, Senkevics, and Rodrigues (2024), allowing the classification and description of school pathways over time. In addition, a documentary analysis of the normative framework supporting Brazilian educational policy was carried out, highlighting the Federal Constitution of 1988, the National Education Guidelines and Framework Law (LDB), the National Education Plan (PNE 2014–2024), the Brazilian Inclusion Law (LBI), Decree No. 5.626/2005, and Law No. 14.191/2021. This analysis discusses tensions between the context of policy production and the context of practice, revealing contradictions between legal advances and operational limitations in policy implementation within education systems. The results indicate that, although formal access to mainstream schooling has expanded, the educational trajectories of deaf students and/or students with hearing impairment remain marked by high levels of age-grade distortion, grade repetition, and dropout, particularly during transitions between educational stages, especially from lower secondary education to upper secondary education. Access has not consistently translated into sustained retention and completion, pointing to weaknesses in the implementation of inclusive and bilingual education policies, particularly regarding the pedagogical, linguistic, and institutional conditions required to guarantee the right to education. This dissertation contributes to the advancement of longitudinal studies on deaf education in Brazil by providing empirical evidence that highlights the gap between rights ensured at the normative level and the actual conditions of schooling. By exposing the limits of formal universalization, the study reinforces the need for public policies that articulate access, retention, meaningful learning, and completion, ensuring the full educational experience of deaf students within Basic Education.
Reciclagem de sucata de usinagem de aço inoxidável austenítico visando uso em manufatura aditiva
(Universidade Federal de São Carlos, 2026-03-30)
Shimoda, Rafael Daiki
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Gargarella, Piter
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https://lattes.cnpq.br/4641435644243916
;
https://orcid.org/0000-0003-4445-5819
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https://lattes.cnpq.br/2566785259765058
Metals are widely used as raw materials in the manufacturing of industrial components. However, the exploration of mineral reserves, as well as extraction and beneficiation processes, require high energy consumption and often occur in environmentally sensitive regions. In this scenario, the circular economy emerges as a strategic alternative to reduce dependence on primary resources and minimize the energy impacts associated with metal production. Nevertheless, the feasibility of reuse depends on obtaining recycled materials with properties equivalent to those of the original raw material. In this work, the reuse of stainless steel chips, predominantly from the 316L alloy, was investigated as a raw material for powder production via gas atomization, followed by its application in additive manufacturing through Laser Powder Bed Fusion (LPBF). Initially, a systematic study was conducted on cleaning the chips, emphasizing the removal of organic contaminants, evaluating methods such as water washing, the use of an aqueous solution containing a commercial surfactant, and/or controlled heating. After defining the optimized cleaning method, the chips were cleaned and remelted to produce ingots, which were then gas-atomized. The resulting powders were sieved, resulting in predominantly spherical particles in the 20–75 µm size range, suitable for the LPBF process. Samples were then produced by LPBF and characterized regarding microstructure, phase formation, and mechanical properties. The results indicated that the most efficient cleaning method, evidenced by the greatest mass variation, was the combination of washing with an anionic surfactant solution (volume ratio of 0.005) and heating at 300 °C, as shown by the mass variation analyses. Heating without washing, although with a similar mass variation, performed similarly but caused color changes in the chips, suggesting possible carbon incorporation on the surface. The powders obtained were sieved, resulting in predominantly spherical particles in the 20–75 µm range with good flowability, suitable for LPBF processing. The powder produced from recycled material exhibited adequate flowability and morphology for LPBF processing. However, microstructural analysis of the samples manufactured by LPBF revealed the presence of cracks along grain boundaries, associated with solidification cracks, which mainly occurred due to the high carbon content in this material.
Efetividade do Programa Nacional de Alimentação Escolar (PNAE) em tempos de pandemia: uma análise de dois municípios da região sudoeste paulista
(Universidade Federal de São Carlos, 2026-03-30)
Godoi, Ronaldo Wilson de
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Hoffmann, Wanda Aparecida Machado
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https://lattes.cnpq.br/7609135667093837
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https://orcid.org/0000-0002-1359-1802
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https://lattes.cnpq.br/9916231359218456
This research encompasses an analysis of the effectiveness of the National School Feeding Program (PNAE) during the pandemic, considering the program's adaptation strategies in the face of the public calamity. It is a qualitative study conducted in two municipalities in the southwestern region of the State of São Paulo. Semi-structured interviews were carried out with program managers and nutritionists in the studied municipalities. Before the pandemic, while students were attending school and had proper access to school meals, the program strongly contributed to the development, growth, and personal performance of each student, fostering the formation of healthy eating habits. However, during the Covid-19 pandemic, a new scenario emerged, drastically affecting in-person education systems and students' access to school meals in public schools. After the gradual resumption of in-person classes in schools, students regained access to school meals. Despite the program adopting new adaptation strategies during the pandemic, beneficiary students still experienced a degree of food insecurity due to a lack of access to in-person school meals. Program managers and nutritionists took some initiatives during the COVID- 19 pandemic, such as providing food baskets, vegetables, and prepared meals, but these were insufficient to guarantee adequate nutrition, leading to losses in the quality of teaching and learning for students. This research highlighted the importance of managing the National School Feeding Program (PNAE) in the southwestern region of the state of São Paulo. Furthermore, it contributed to enabling nutritional managers of public policies to reflect on, adapt to, and develop effective strategies for implementing food security policies, whether in optimistic or pessimistic scenarios.
A terceira margem da literatura: transferências entre sistemas de cultura em The Last Of Us Parte 2
(Universidade Federal de São Carlos, 2026-03-31)
Lisita, Bianca Francischini
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Rocha, Rejane Cristina
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https://lattes.cnpq.br/5669300635333699
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https://lattes.cnpq.br/0363783716038166
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https://orcid.org/0000-0003-2735-0185
This thesis investigates The Last of Us part 2 through the lens of Polysystem Theory (Even-Zohar, 1990), proposing that the game constitutes a nomadic product that inhabits a “third margin” between the print literary system, the digital literature system, and the electronic games system. Drawing on the Rosian metaphor of the crossing—which informs both the methodological gesture and the analytical trajectory—the study problematizes the historical indefinition of the literary object, arguing that literariness is not an intrinsic attribute of the text but rather the result of systemic forces mobilized by institutions, repertoires, producers, consumers, and markets. The first part examines the print literary system, highlighting its central position within the literary polysystem and the legitimizing role of the book, singular authorship, and inherited repertoires from a tradition which, although dominant, remains in constant tension with peripheral strata. The study then analyzes the digital literature system, focusing on the role of the Electronic Literature Organization and showing how multimodality, algorithmic processes, and material experimentation broaden the notion of literariness beyond the written word. In this third margin, The Last of Us part 2 is shown to function as a catalyst for frictions among these systems: its audiovisual narrative, its sensorial reading aesthetics, and its programming as a meaning-making agent instantiate what the dissertation terms a “novel of images,” a mode of narrativity that displaces the reader-player into a hybrid interpretive position. The analysis also reveals a crisis of authorship, disputes over legitimacy, and tensions between expectations of interactivity and authorial control within the game system. These conflicts confirm that the product is the core of a systemic misalignment, challenging stable taxonomies and demonstrating that contemporary cultural objects circulate across mutually influencing systems. The study concludes that The Last of Us part 2, by refusing a fixed position, makes visible the polysystem’s own movement: a literature in transit that requires of the researcher not the comfort of familiar margins, but the courage to inhabit the center of the river, where new narrative forms emerge and take shape.
Modificação química de quitosana com etoximetilenos: otimização reacional, caracterização e aplicação na adsorção de cristal violeta e diclofenaco
(Universidade Federal de São Carlos, 2026-03-31)
Mathias, Samir Leite
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Dufresne, Alain
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https://lattes.cnpq.br/2836712749450886
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https://orcid.org/0000-0001-8181-1849
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Menezes, Aparecido Junior de
The increasing presence of organic contaminants in aquatic environments has stimulated significant interest in the development of new adsorbent materials capable of efficiently removing these compounds from water. Among the materials investigated for this purpose, chitosan stands out as a promising biopolymer due to its abundance, biodegradability, and the presence of reactive functional groups along its polymeric backbone. However, the adsorption performance of chitosan can be significantly enhanced through chemical modifications that alter its structure and surface properties. In this context, the aim of this project was to develop functionalized chitosan derivatives through nucleophilic vinylic substitution reactions using alkoxymethylene derivatives bearing different substituent groups, and to investigate how the electronic nature and density of these functional groups influence the adsorption performance of the material. Initially, chitosan was modified using (Ethoxymethylene)malononitrile, allowing the establishment of suitable reaction conditions for polymer functionalization through the formation of conjugated enamine structures, achieving a degree of substitution of up to 0.91. Subsequently, new chitosan derivatives were synthesized using Diethylethoxymethylenemalonate and Ethyl 2-cyano-3-ethoxyacrylate (Ethyl (ethoxymethylene)cyanoacetate), introducing diester and ester–nitrile groups, respectively. For these systems, reaction conditions were optimized using a design of experiments approach in order to maximize the degree of polymer functionalization. The obtained materials were characterized by different analytical techniques to evaluate the structural and physicochemical modifications resulting from the introduction of these functional groups. The adsorption performance of the synthesized derivatives was evaluated for the removal of model organic contaminants from aqueous solutions, including the dye crystal violet and the pharmaceutical compound diclofenac. The results demonstrated that chemical modification of chitosan significantly altered the surface properties of the material, directly influencing its adsorption capacity. An increase in the density of functional groups along the polymer chain led to enhanced affinity between the adsorbent material and the investigated contaminants, reaching a maximum adsorption capacity on the order of 219 mg.g-1 for diclofenac and 383 mg.g-1 for violet crystal. Overall, the results obtained in this thesis demonstrate that the chemical modification of chitosan through nucleophilic vinylic substitution reactions represents an efficient strategy for the development of new biopolymer-based adsorbent materials. In addition to improving the adsorption performance of chitosan, this synthetic approach also opens new perspectives for the development of functional polymeric materials with tunable properties for environmental applications.
Coumarin–dihydropyrimidinone hybrids as promising agents against ovarian cancer: synthesis, SAR, and in silico evaluation
(Universidade Federal de São Carlos, 2026-03-31)
Santos, Jhonathan dos
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Martinez, Alice
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Abe, Saulo Henrique Mendes
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Mello, Marcos Vinícius Palmeira de
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Santos, João Pedro Araujo dos
The coumarin scaffold is widely recognized for its broad range of biological activities, including antibacterial, anti-HIV, and anticancer properties. In parallel, molecular hybridization has emerged as an effective strategy to enhance biological activity and expand chemical diversity within drug discovery libraries. In this study, a series of coumarin–dihydropyrimidinone (DHPM) hybrids were synthesized via a Biginelli multicomponent reaction. The in vitro cytotoxic activity of these compounds was evaluated against a panel of cancer cell lines. A structure–activity relationship (SAR) analysis was carried out to elucidate the influence of different substituents and physicochemical properties on anticancer activity. Among the synthesized compounds, LSPN925 emerged as a good anticancer candidate and was further investigated for its effects on cell morphology and colony formation. In addition, in silico pharmacokinetic and toxicological evaluations were performed for the most active compounds to predict their drug-likeness and safety profiles. The preliminary SAR analysis revealed that lipophilicity and molecular volume of the compounds play a critical role in modulating their cytotoxic activity, highlighting these parameters as key considerations in the rational design of new coumarin-based anticancer agents. Overall, these findings support the potential of coumarin–DHPM hybrids as promising scaffolds for further anticancer drug development.
A educação midiática e o discurso neoliberal nas plataformas digitais educacionais de formação docente de língua portuguesa
(Universidade Federal de São Carlos, 2026-03-31)
Souza, Parla Camila dos Reis de
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Sargentini, Vanice Maria Oliveira
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http://lattes.cnpq.br/1406919572611392
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https://orcid.org/0000-0002-7760-3075
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https://lattes.cnpq.br/2923838793375892
This dissertation examines how the Brazilian educational digital platforms EducaMídia and Escolas Conectadas construct Media Education within a broader field structured by neoliberal rationality. Drawing on Michel Foucault’s concepts of archive, veridiction, tékhne, and parrhesia, I analyze how these platforms position themselves as legitimate authorities in the training of Portuguese Language teachers in Basic Education, thereby displacing the public university from its historically established role in teacher formation. The corpus is constituted, in Foucauldian terms, as an archive comprising EdTech mapping reports, national guidelines and regulatory documents issued by the Ministry of Education (MEC), editorials and institutional materials produced by the platforms, and technical notes from INEP concerning the acquisition of digital devices and internet access in Brazilian public schools. This archive enables an examination of the ongoing platformization of Basic Education, with particular attention to its epistemic claims, economic investments, and institutional entanglements. I argue that the consolidation of platform-based Media Education is closely linked to increased investment in educational startups and to policy decisions by MEC that favor digital mediation and competency-based frameworks. Through a discourse-analytic reading informed by Christian Laval and Pierre Dardot’s account of neoliberal governmentality, I demonstrate how the platforms mobilize tékhne as a regime of technical expertise that produces pedagogical “enchantment” through design, usability, and apparent efficiency. Simultaneously, their short-term training formats and modular courses reproduce neoliberal logics of flexibilization, responsibilization, and market-oriented accountability, thereby legitimizing public expenditures at the municipal, state, and federal levels that sustain the infrastructure of platformization. Pedagogically, I show that the lesson plans, workshops, and training modules offered by these platforms are characterized by the absence of explicit bibliographic grounding, the lack of articulated methodological frameworks, and a marked superficiality in their treatment of multimodal and journalistic-media genres. These genres are objectified and didacticized in ways that reduce their discursive complexity. I contend that this configuration functions as a mechanism of subjection—what Foucault conceptualizes as a process of minoritization—through which teachers are incorporated into platform-dependent forms of professional practice.
Democracia, liberdade e gênero: ressignificações perigosas no discurso de Jair Bolsonaro (2019-2022)
(Universidade Federal de São Carlos, 2026-04-01)
Camargo, Bruna Quinsan
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Cepêda, Vera Alves
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https://lattes.cnpq.br/4917331423373631
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https://orcid.org/0000-0002-1419-0090
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https://lattes.cnpq.br/7320245973318541
This study analyzes how the presidential discourse of Jair Bolsonaro, disseminated in live streams on YouTube between 2019 and 2022, operates through the reconfiguration of the meanings of freedom and democracy, contributing to processes of dedemocratization in which democracy is undermined in the name of democracy itself. To investigate how the discourse of Jair Bolsonaro reformulates the concepts of freedom and democracy in order to promote dedemocratization, the transcriptions of the live streams were analyzed by Content Analysis, with the aid of the software MAXQDA. It is argued that Bolsonaro’s discourse operates through three articulated moves. First, it constructs a binary opposition that associates the left with communism, corruption, and dictatorship, while presenting the right as synonymous with democracy and freedom, a narrative that enables the delegitimization of democratic institutions portrayed as infiltrated and captured by an ideological enemy. Second, it redefines the meaning of freedom and democracy by linking them to the defense of traditional Christian morality, framing feminist and gender agendas as threats to the family, to society, and to democracy itself. Finally, it identifies democracy with the figure of the leader and with the will of his followers, converting personal loyalty into a criterion of political legitimacy and hollowing out democratic pluralism. The results show that this discursive configuration delegitimizes democratic institutions and the defense of gender- and sexuality-related rights in the public debate, personalizes political authority by transforming loyalty to the leader into a criterion of legitimacy, treats political opponents as enemies and restricts pluralism, and normalizes the acceptance of extra-institutional solutions, such as coups d’état, thus contributing to processes of democratic erosion in Brazil.
Pomacea figulina (Spix in Wagner, 1827) (Mollusca, Gastropoda) como uma espécie-modelo para ensaios ecotoxicológicos e monitoramento ambiental de microplásticos em águas doces
(Universidade Federal de São Carlos, 2026-04-01)
Woppe, Natalia
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Arruda, Eliane Pintor de
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https://lattes.cnpq.br/8843243211552880
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Waldman, Walter Ruggeri
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https://lattes.cnpq.br/0616238673458322
This dissertation analyzed the occurrence and effects of microplastics in the gastropod mollusk Pomacea figulina (Spix in Wagner, 1827), to evaluate its potential as a bioindicator in aquatic environments. The work was organized into a general introduction, three articles, and conclusions. In the first article, a protocol for rearing the species in the laboratory was developed, testing different diets to identify the ideal conditions for growth and survival. This is an essential step, given the difficulties encountered in waters with low hardness, which compromise the integrity of the shells. The results demonstrated that the combination of feed with kale was the most efficient regime, while the diet composed exclusively of kale resulted in high mortality. The second article characterized microplastics present in specimens collected from a tributary (Rio Pirajibu-Mirim - 23°29'24.2" S; 47°23'06.3" W) of the Sorocaba River, analyzing the color, shape, size, chemical characterization, and abundance of the eliminated particulates. Fibers and fragments were identified as the predominant components, and it was found that clearance is not linear, suggesting temporary retention in the digestive tract. The third article consisted of controlled exposure experiments (72 h) to polyethylene microplastics at different concentrations (10% and 20%), allowing the evaluation of elimination patterns and the possibility of bioaccumulation. Taken together, the results demonstrate that P. figulina presented characteristics favorable to biomonitoring, such as regional abundance, capacity to ingest plastic particles, and sensibility to impacted environments. The dissertation provided data on the maintenance of the species under laboratory conditions and on the effects of microplastics on freshwater mollusks, presenting it as a promising model for studies of plastic pollution in continental ecosystems.