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Controle de velocidade de um robô móvel autônomo utilizando lógica fuzzy
(Universidade Federal de São Carlos, 2026-01-07)
Souza, Hugo da Silva e
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Inoue, Roberto Santos
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https://lattes.cnpq.br/6221209121565990
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https://orcid.org/0000-0003-2813-9330
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https://lattes.cnpq.br/1424302433606983
The increasing adoption of autonomous mobile robots in industrial, logistics, and academic applications imposes significant challenges on speed control, especially in scenarios subject to nonlinearities, uncertainties, and load variations. Traditionally, speed control is performed using classical controllers, such as the Proportional–Integral (PI) controller, which provides satisfactory performance in linear systems but exhibits limitations under dynamic operating conditions. In this context, this work proposes the development and validation of a fuzzy logic–based speed control system applied to a differential-drive autonomous mobile robot. The fuzzy controller was designed using a Mamdani-type inference system, with the speed error and the variation of the error as input variables and an incremental control output. The methodology included experimental plant characterization, embedded system implementation, and experimental tests under different load conditions. The performance of the fuzzy controller was compared with that of a classical PI controller using metrics such as response time, steady-state error, and the Integral of Absolute Error (IAE). Experimental results demonstrate that the fuzzy controller achieved improved robustness and superior speed tracking performance, particularly under load variations, validating the proposed hypothesis and highlighting the potential of fuzzy logic for mobile robotics applications.
Prevalência de leveduras da espécie Saccharomyces cerevisiae na produção de etanol: seleção de linhagens promissoras para o melhoramento da eficiência produtiva
(Universidade Federal de São Carlos, 2026-01-07)
Silva, Dario Sampaio da
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Cunha, Anderson Ferreira da
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https://lattes.cnpq.br/0329741640375661
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https://lattes.cnpq.br/6773069968922725
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https://orcid.org/0009-0001-6976-4098
Fuel ethanol production in Brazil relies on the performance of industrial Saccharomyces cerevisiae yeasts, which are subjected to successive stresses during the fermentative process. In this study, twenty industrial strains were evaluated through the integration of molecular and physiological analyses, using strain CAT-1 as a control, with the aim of selecting promising strains for industrial application. Molecular analyses confirmed the identity of the strains as S. cerevisiae and revealed high genetic diversity, with the formation of four main genotypic groups, in addition to strains displaying unique genotypic profiles. Physiological performance, assessed based on growth profiles in different media, enabled the calculation of the Total Performance Index (TPI), highlighting strains 2018-12, 2018-08, 2023-02, and 2022-13 as exhibiting superior growth compared to the control. Acid stress tolerance, evaluated through viability and cell concentration after acid treatment, was integrated into the Acid Treatment Tolerance Index (ATI), identifying strains 2022-15 and 2023-06 as among the most resistant. The combined analysis of TPI and ATI allowed the classification of the strains into three distinct physiological profiles: high growth performance with low acid tolerance; high acid tolerance with moderate performance; and a balanced profile between growth and stress tolerance. In this context, strains 2022-13 and 2022-04 stood out for their balanced performance, emerging as the most promising candidates for application in industrial ethanol production processes. These results demonstrate that the integration of molecular and physiological approaches is an efficient strategy for selecting yeasts adapted to the industrial fermentative environment.
Conjunto de dados da tese "A artesania sociológica de Heleieth Iara B. Saffioti (1934–2010): trajetória e práxis"
(Universidade Federal de São Carlos, 2026-01-07)
Moraes, Samantha Camacam de
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https://lattes.cnpq.br/5705942169738314
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https://orcid.org/0000-0001-5058-8445
Os Awaeté e os Toria: associativismo e relações interétnicas na TI Apyterewa
(Universidade Federal de São Carlos, 2026-01-07)
Daniel, Sofia Scanavini
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Carvalho, Joelson Gonçalves de
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https://lattes.cnpq.br/0141039743607067
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https://orcid.org/0000-0003-4894-1400
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https://lattes.cnpq.br/6231265590580046
The Apyterewa Indigenous Land, located in the state of Pará, has been subject to systematic invasions and attacks since the 1980s. Within this context is situated the Parakanã Indigenous people, who self-identify as Awaeté. This study seeks to understand the relational dynamics between the Parakanã and the Associação Indígena Tato’a (AIT), which constitutes the sole representative entity of the people in their relations with the State and partner organizations, and whose team is composed of both Indigenous and non-Indigenous members. The analysis is based on an ethnographic study conducted during the General Assembly of the Parakanã People, which served as a space for meetings among indigenist agencies, partner organizations, the AIT, and the community. In order to examine the internal functioning of the association, an interview was carried out with Tato’a’s technical advisor. Given that the focus of the research lies in the community’s perspectives on the association, semi-structured interviews were also conducted with five Indigenous participants, who articulated their views regarding the association’s work, achievements, and relationships with the non-Indigenous staff employed by the AIT. To apprehend the nuances of each interview, the method of content analysis was employed. Based on the findings of the research, it can be concluded that the relationship between the Indigenous community and the association extends beyond that of a people and the entity that represents or supports them. The AIT has become the voice, organizational form, and locus of resistance of the Parakanã people themselves, managed in accordance with their own interests. The relationship with non-Indigenous individuals working within the AIT is not devoid of criticism, yet it operates both within professional and bureaucratic domains and within the sphere of informal relations, shaped by socio-affective ties.
Avaliação do uso de sistema de automação para cultivo de cogumelo Psilocybe cubensis
(Universidade Federal de São Carlos, 2026-01-08)
Tacone, Allan Johnny
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Santos, André Cordeiro Alves dos
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https://lattes.cnpq.br/2131880667704281
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https://orcid.org/0000-0001-6323-5200
This study evaluated the effectiveness of a low-cost automation system applied to the cultivation of Psilocybe cubensis, comparing it to traditional manual cultivation. Six cultivation greenhouses were built, three automated and three controlled, in which three main parameters were evaluated: dry weight, basidiocarp size, and total number of "individuals". The automated system controlled the temperature by hysteresis (27–29 °C) and performed programmed air exhaust cycles. The results demonstrated that the automated system produced larger mushrooms (Control: 170.64 cm and average: 56.88 cm; Automated: 223.45 cm and average: 74.48 cm), in greater quantity (Control: 15 units; Automated: 20 units); and with greater dry weight (Control: 13.085 g; Automated: 20.393 g). Although the increase in average weight was modest, the significant growth in height and total productivity indicates that temperature and exhaust control aided in the development of the basidiocarps. It is concluded that accessible automated systems can improve the efficiency and standardization of mushroom cultivation, even under simple conditions, reinforcing the potential of Agriculture 4.0 in mushroom farming. Future improvements are suggested, including the automation of humidity control and the integration of CO₂ sensors.
Surface activation of Monel 400 alloy as novel electrode for hydrogen production: insights on electrocatalysis and electroactive surface area
(Universidade Federal de São Carlos, 2026-01-09)
Freitas, Jhonys Machado
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Sgarbi, Ricardo
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Ruotolo, Luis Augusto Martins
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https://lattes.cnpq.br/2068549631838036
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https://lattes.cnpq.br/2388966785886132
This work investigates Monel 400 as a non-noble metal electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media, focusing on performance enhancement through electrochemical dealloying. Controlled electrocorrosion at 0.20 V and 0.45 V for different durations produced Ni-rich porous surfaces with significantly increased electrochemically active surface area (ECSA). Among the tested conditions, dealloying at 0.45 V for 60 min delivered the best performance, with overpotentials of 240 mV at −10 mA cm−2 and 389 mV at −80 mA cm−2, a Tafel slope of 105 mV dec−1, and a 20-fold increase in ECSA relative to pristine Monel. SEM and EDS revealed the formation of a hierarchical Ni ligament network with partial Cu depletion, while EIS confirmed enhanced capacitive and transport properties. The catalyst also demonstrated stable operation for 72 h. These results highlight dealloyed Monel 400 as a robust, scalable, and efficient HER catalyst for alkaline water electrolysis.
Cônicas: uma forma interessante para abordar o tema no ensino médio
(Universidade Federal de São Carlos, 2026-01-09)
Zambon, Raphael Carlini
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Barros, Tomas Edson
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https://lattes.cnpq.br/5442017085057925
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https://lattes.cnpq.br/3916639528250159
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Barros, Tomas Edson
The present study examines the role of manipulatives and digital technologies—specifically mathematical modeling and the use of GeoGebra—in the teaching and learning of conic sections, a topic often overlooked by high school mathematics teachers and one in which many students encounter considerable difficulty. The research investigated whether these approaches enhanced students’ understanding and performance, employing a methodology centered on practical challenges and computer-lab activities. Grounded in constructivist theory, the work emphasizes the importance of active learner engagement with the environment as a catalyst for meaningful learning. The project was designed to lead students to discover the conic sections through hands-on modeling, subsequently deepening their knowledge via theoretical instruction and enriching it with detailed exploration using GeoGebra. Group work in the creation of physical models initiated the discovery process. The lessons were developed in response to students’ questions and misconceptions arising during model construction, as well as to meet the curricular requirements of high school mathematics. Through modeling, problem-solving, and technological interaction with the conic sections, students experienced the mathematical content in a distinctive, contextualized, and engaging way. Keywords: Conic sections, Geogebra, manipulative models.
“Eu visto preto por dentro e por fora”: interseccionalidades entre o rap oralizado e o rap sinalizado
(Universidade Federal de São Carlos, 2026-01-09)
Barros, Kamilly Castanha
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Vasconcelos, Stephanie Caroline Alves
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https://lattes.cnpq.br/2163002687410761
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https://orcid.org/0000-0001-7323-9440
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https://lattes.cnpq.br/7408548722149692
This study investigates how spoken rap and signed rap converge historically and socially, taking musical experiences as a starting point for academic reflection. The research stems from the observation of the lack of debate within universities regarding art produced by Black bodies, as well as by Black Deaf bodies within rap, and seeks to understand how art becomes a space of re-existence, allowing Deaf and peripheral subjects to recognize themselves as producers of culture. Grounded in historical-dialectical materialism and an intersectional perspective, the study discusses how spoken rap and signed rap, despite their distinct structures, converge in their purposes of denunciation, resistance, and the affirmation of insurgent identities. These artistic expressions, shaped by race, class, gender, and disability, confront mechanisms of social exclusion sustained by racism and capitalism, while simultaneously breaking with Eurocentric narratives imposed by matrices of oppression. The research demonstrates that spoken rap and signed rap share not only a critique of systemic violence, but also a re-signification of the acronym RAP (rhythm and poetry) as a practice linked to social movements and strategies of aquilombamento. Thus, it is concluded that both artistic forms make it possible to retell invisibilized histories, re-signify identities, and produce new forms of collective resistance.
Aprendizado de métricas para filtragem não local e classificação de imagens tomográficas de sementes agrícolas
(Universidade Federal de São Carlos, 2026-01-15)
Brito, André Ribeiro de
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Levada, Alexandre Luis Magalhães
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https://lattes.cnpq.br/3341441596395463
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https://lattes.cnpq.br/8676076486184629
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Levada, Alexandre Luis Magalhães
Image denoising is a recurrent problem across a wide range of applications, from preprocessing in computer vision to computer-aided diagnosis. This work proposes and evaluates an enhanced Non-Local Means (NLM)–based filtering approach, termed Dual Non-Local Means (Dual NLM), which incorporates information-theoretic divergence measures to quantify similarities between image regions. We investigated the Kullback–Leibler, Bhattacharyya, Hellinger, and Cauchy–Schwarz divergences with the objective of preserving edges and fine details while more effectively reducing Gaussian noise. Experiments were conducted on 18 tomographic images from different agricultural crops (sunflower, chickpea, wheat, seed mix, jatropha, and soybean), corrupted with additive Gaussian noise of variance 𝜎𝑛 = 10. Quantitative evaluation using the Peak Signal-to-Noise Ratio (PSNR) demonstrated that the Dual NLM variants based on Cauchy–Schwarz and Kullback–Leibler divergences outperform, on average, the standard NLM and classical filters (Wiener, Anisotropic Diffusion, and Total Variation). In a subsequent stage, we investigated the usefulness of the restored images for pattern analysis. Local descriptors (patches) were extracted, and two dimensionality-reduction strategies were compared: SEI-ISOMAP (with stochastic diffusion distances) and PCA. The resulting embeddings were evaluated using trustworthiness, Pearson correlation between pairwise distances, and silhouette index, and subsequently used as input to supervised classifiers (KNN, SVM with RBF kernel, and Random Forest), whose performance was assessed in terms of accuracy and macro-𝐹1 under stratified cross-validation. The results indicate that SEI-ISOMAP provides better structural preservation and class separability than PCA, and that the combination Dual NLM + SEI-ISOMAP + Random Forest achieves the best average classification performance. Overall, the findings highlight the potential of combining information-theoretic similarity measures with diffusion-based dimensionality reduction for restoration and discriminative analysis of tomographic images corrupted by Gaussian noise.
Dieta e dispersão de sementes por lobo-guará (Chrysocyon brachyurus) em área de Cerrado antropizado, na região de Mogi-Guaçu - SP
(Universidade Federal de São Carlos, 2026-01-19)
Ercolin, Gabriele Arthur
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Rocha, Vlamir José
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https://lattes.cnpq.br/8044368595391973
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https://orcid.org/0000-0002-9889-8773
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https://lattes.cnpq.br/2088701157045136
The maned wolf (Chrysocyon brachyurus), largest canid in South America, is classified as a vulnerable species, mainly due to habitat loss and alteration, hunting pressure, risk of diseases transmitted by domestic animals and road kills. Feeding primarily on small vertebrates, insects and fruits, especially of the “wolf fruit”, the maned wolf plays an important role as a seed disperser, being essential for the maintenance of the ecosystems in which it occurs. Therefore, this study aimed to analyze the feeding ecology of this species, describing quantitatively and qualitatively its diet and its role as a seed disperser in a human-modified landscape at Fazenda Campininha in Mogi Guaçu. A total of 109 scats were collected, resulting in 27 identified taxa, with Solanum lycocarpum, Poaceae and Cricetidae showing the highest frequencies of occurrence among samples. Germination test was conducted with S. lycocarpum seeds, showing a germination rate of 6% for seeds recovered from scats, whereas seeds obtained directly from fruits showed a germination rate of 2.5%, in addition to a lower mean germination time (MGT) and a higher germination speed index (GSI) for ingested seeds. Seed viability was assessed using the tetrazolium test, indicating an average viability of 90% for seeds recovered from scats. These results highlight the importance of the maned wolf in seed dispersal and the provision of ecological services, emphasizing the need for the conservation of the species to ensure the functioning of Cerrado ecosystems.
Ressignificando a família em contextos não-monogâmicos: práticas de cuidado e apoio
(Universidade Federal de São Carlos, 2026-01-20)
Silva, Jéssica Vieira da
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Leite Júnior, Jorge
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https://lattes.cnpq.br/7253561448346772
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https://orcid.org/0000-0001-6234-9169
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https://lattes.cnpq.br/8573083103433873
This research investigated the processes of redefining the concept of family in three non monogamous groups. The analysis considered both digital and physical spaces focused on sociability and the construction of collective bonds. The study aimed to understand how participants conceive, negotiate, and reinterpret family, kinship ties, and care practices. Instead of positioning themselves as just another type of family among others, these communities frequently propose new ways of naming and understanding affective bonds, destabilizing normative parameters centered on monogamy, conjugality, and consanguinity. Based on Pierre Bourdieu's theory of social classification systems, the study seeks to understand how these subjects, as classifying agents, develop alternative symbolic references, questioning legal and cultural conventions and asserting other legitimate ways of living interpersonal relations and affective ties. The research also analyzed the role of friendships as a structural element of these relational webs, highlighting alternative forms of organization and care that challenge traditional family models. The study is supported by theoretical frameworks on family, kinship, care, and gender, allowing the investigation to be situated within a broader context of different relational arrangements and affective practices. To this end, ethnography was adopted as the research method, focusing on the observation of interactions within the groups and on interviews conducted with the organizers of these spaces, seeking to apprehend the practices, discourses, and daily negotiations that sustain these experiences and reveal new ways of signifying family and care.
A trajetória da distribuidora O2 Play na busca de caminhos possíveis
(Universidade Federal de São Carlos, 2026-01-22)
Camargo, Rogério Zagallo
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Sá Neto, Arthur Autran Franco de
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https://lattes.cnpq.br/5055550097454248
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https://orcid.org/0000-0003-4455-8105
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https://lattes.cnpq.br/6274353645354362
This research investigates the trajectory of the distributor O2 Play during its first ten years of operation, examining the possible paths of audiovisual distribution that have emerged as a result of technological, market, and public policy transformations in Brazil and worldwide over recent decades. The study analyzes the impact of public policies such as FUNCINE (Funds for the Financing of the National Film Industry), PAR (Additional Revenue Award), and the FSA (Audiovisual Sector Fund), and their relationship with the creation of a favorable environment for the emergence of new Brazilian independent distributors, including O2 Play. A qualitative methodology was applied to the analysis of official data on theatrical film releases and public investments received by the distributor, as provided by OCA (the Brazilian Observatory of Cinema and Audiovisual) of ANCINE (the National Cinema Agency), Audiovisual Sector Fund, and BRDE (Regional Development Bank of the Extreme South). The research mapped the various distribution strategies pursued by O2 Play, ranging from theatrical exhibition to free-to-air and pay television, and extending to digital platforms, across a wide range of negotiation formats. The study concludes with a case study of the documentary Chorão, Marginal Alado (Felipe Novaes, 2021), distributed by O2 Play.
Coleções entomológicas como ferramenta pedagógica na transformação das representações sociais sobre a diversidade dos insetos
(Universidade Federal de São Carlos, 2026-01-23)
Oliveira, Rubens Coutinho Soares
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Dias, Angélica Maria Penteado Martins
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https://lattes.cnpq.br/8637344058859147
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https://orcid.org/0000-0002-8371-5591
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https://lattes.cnpq.br/4898340644268325
This study investigated the contributions of building entomological collections as an active pedagogical strategy for transforming the negative social representations of elementary school students about insects. The qualitative-quantitative research was conducted with 23 seventh-grade students from a public school in São Carlos, São Paulo, using pre- and post-intervention questionnaires to map changes in affective, conceptual, and taxonomic dimensions.Based on Moscovici's Theory of Social Representations and Abric's structural approach, as well as Costa Neto's Ethnoentomology and Paulo Freire's pedagogy of autonomy, the study initially diagnose da strong “Entomoprojective Ambivalence,” where feelings of disgust and fear predominated, associated with a negative utilitarian view and taxonomic errors. The results obtained after the collection assembly workshop revealed a significant reversal in the affective polarity of the class: the feeling of “Disgust” was drastically reduced, giving way to “Curiosity,”which became the dominant feeling, although “Fear” remained stable, suggesting the resistance of the central core of the representation. In the cognitive sphere, a qualitative leap was observed in the morphological accuracy of the drawings and a 76.32% reduction in taxonomic identification errors,indicating the overcoming of the “insect” ethnocategory. Furthermore, there was a transition in functional perception, which shifted from the notion of “harmfulness/uselessness” to an “Ecological Systemic” understanding. It can be concluded that the direct and technical manipulation of specimens acted as an effective mediating device in the flexibilization of the peripheral system ofsocial representations, allowing students to transition from naive curiosityto epistemological curiosity, reconfiguring their relationship with biodiversity from one of extermination to one of scientific investigation and respect.
Surface functionalization of the AA2017 aluminum alloy powder for use in additive manufacturing
(Universidade Federal de São Carlos, 2026-01-23)
Batistão, Bruna Fernanda
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Gargarella, Piter
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https://lattes.cnpq.br/4641435644243916
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https://orcid.org/0000-0003-4445-5819
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https://lattes.cnpq.br/4842890331231831
Additive manufacturing (AM) of high-strength aluminum alloys faces challenges due to their high reflectivity, high thermal conductivity, poor powder flowability, and susceptibility to solidification cracking during laser powder bed fusion (L-PBF). These issues hinder stable powder spreading, full densification, and microstructural control, thus limiting their industrial applicability. In this context, the objective of this work was to investigate the surface functionalization of gas-atomized AA2017 powder – an aircraft Al-Cu-Mg alloy from the 2xxx series (EN AW-2017, AlCu4MgSi) – as a viable strategy to improve flowability, laser absorption, and solidification behavior during L-PBF processing. Two approaches were explored: chemical etching using acidic (HNO3) and basic (NaOH) solutions, and the addition of TiC particles with different sizes and concentrations. Chemical etching treatments improved powder flowability and laser energy absorption but promoted the formation of oxide layers on powder surface, which increased oxidation-related porosity in the as-built samples. Conversely, the addition of TiC effectively modified the alloy solidification, promoting strong microstructural refinement and a columnar-to-equiaxed transition, along with the formation of coherent Al3Ti particles, resulting in dense and crack-free samples. A key and novel outcome of this work is that fine micrometer-sized TiC particles (<4 μm) outperformed nanoparticles in enhancing the microstructure and mechanical properties of the AA2017 alloy. Although nanoparticles can theoretically provide greater grain refinement and strengthening, their strong tendency to agglomerate limited their efficiency. Therefore, the addition of fine micrometer-sized TiC particles proved to be a practical and efficient route to improve the processability of high-strength aluminum alloys by L-PBF, while also being safer to handle than nanoparticles. Additionally, to the best of the author's knowledge, this work provides important and new insights into the mechanisms governing grain refinement, strengthening, and discontinuous yielding behavior in TiC-modified 2xxx series aluminum alloys in L-PBF for the first time in the literature.
Planejar em Desenhos: a visão das professoras de Educação Infantil
(Universidade Federal de São Carlos, 2026-01-23)
Mucheroni, Alice Meirelles
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Zanon, Dulcimeire Aparecida Volante
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https://lattes.cnpq.br/1811225448261362
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https://orcid.org/0000-0002-3728-6175
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https://lattes.cnpq.br/7450009330370517
This research investigated the use of drawing as a resource for pedagogical planning in Early Childhood Education, seeking to answer the central question: what is the teachers’ view of the action of planning through drawings? The scarcity of studies that relate drawing and planning reinforced the relevance of the investigation. The theoretical foundation of the research leads us to understand the drawing of planning as an ethical and aesthetic act, in which the teacher is constituted in a dialogical relationship with the other, assuming their uniqueness and responsibility toward the world. This perspective is articulated with Participatory Pedagogies, which value the child as protagonist and the listening of their multiple languages. In this context, drawing takes a place in sensitive planning, conceived as a flexible, documentary, and expressive pathway. The study also dialogues with the idea of the Reflective Teacher, which leads us to reflect on drawing as a tool for reflection in action and the transformation of practice, and with Visual Literacy, which legitimizes drawing as an essential competence for thinking, organizing, and communicating pedagogical ideas. The data were produced in five meetings held at a Municipal Center for Early Childhood Education in São Carlos, with the participation of eleven teachers. As instruments, we obtained the drawings produced by the teachers, written records, the researcher’s reflective journal, conversation circles, and word clouds, which were analyzed using Discursive Textual Analysis (DTA). The results initially showed insecurity and resistance among the teachers to drawing, resulting from the predominance of writing in pedagogical practice. However, throughout the meetings, drawing was re-signified as a resource that favored clarity, organization, and playfulness in planning. The participants recognized that drawing made it possible to get closer to their own pedagogical intentions, as well as to broaden reflection on the spaces, times, and materials of Early Childhood Education. We conclude that drawing can be incorporated into planning as a complementary language, enriching the process of pedagogical organization and strengthening child-centered practices. The research contributed to the professional development of the teachers and resulted in an educational product composed of suggestions for integrating drawing into teaching planning.
Avanços e limites de intervenções urbanísticas em assentamentos informais de municípios de médio porte no Brasil e Argentina
(Universidade Federal de São Carlos, 2026-01-26)
Almeida, Natasha Nême Gonçalves de
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Ursino, Sandra Valeria
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https://orcid.org/0000-0002-6136-5105
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Gonçalves, Luciana Márcia
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https://lattes.cnpq.br/9491069760631962
In the 20th century, the rapid demographic growth and the uncontrolled urban expansion in Latin America contributed to the formation of informal settlements in the cities. The right to adequate housing has been widely studied at the international level; however, its multidimensional character, according to the definitions of the UN General Comment N. 4, still lacks parameters for analysis and application. An important step to define such parameters is the evaluation of political actions promoted by legal instruments. Urban and housing policy went through important milestones — in Brazil, through the Federal Constitution (1988) and the City Statute (2001), and in Argentina, through the Constitution (1994) and the Ley de Acceso Justo al Hábitat (2013). In both countries, especially in the area of land tenure and urban regularization, the revision implemented in Brazil by the Federal Law of Urban Land Regularization (13.465/2017) and, in Argentina, by the National Law of the Regimén para la Integración Socio-urbana (27.453/2018) brought significant changes. Moreover, despite the diversity of housing programs implemented in Argentina and the Minha Casa Minha Vida Program in Brazil, the housing needs of the low-income population persists, and access to urbanized land remains highly financialized. Considering such paradigm changes in the last 15 years, the objective of this study was to analyze the results promoted by these changes in the legal and regulatory framework regarding access to urbanized land by low-income populations. For this purpose, the advances and limits of intervention policies in informal settlements were evaluated, considering land tenure and urban regularization at the municipal and/or provincial levels, based on six selected cases of urbanization, removal, and regularization — completed or in an advanced stage — in the medium-sized cities of Bauru (Brazil, State of São Paulo) and La Plata (Province of Buenos Aires). The methodology included bibliometric and bibliographic review, documental research, field research, and qualitative-quantitative evaluation of the right to adequate housing involving the dimensions of tenure security, location, and availability of services, materials, facilities, and infrastructure. The results provided an exchange of experiences involving political actions applied in both cities, based on the selected case studies.
Métodos: estabilidade a longo prazo da regulação autonômica e cardiovascular em um modelo de serpente descerebrada
(Universidade Federal de São Carlos, 2026-01-26)
Leite, Cléo Alcantara Costa
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https://lattes.cnpq.br/2031764784233552
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https://orcid.org/0000-0002-5648-5903
A pele dos anfíbios como fontes de biomarcadores para estudos de monitoramento ambiental: uma revisão bibliográfica sistemática
(Universidade Federal de São Carlos, 2026-01-27)
Chiaperini, Matheus Henrique da Silva
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Salla, Raquel Fernanda
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https://lattes.cnpq.br/1738422158151824
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https://lattes.cnpq.br/8689050972573634
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Carvalho, Cleoni dos Santos
Amphibians constitute a broad and diverse group and are considered reliable bioindicator models due to their high sensitivity to environmental changes. Amphibian skin is a semipermeable, vascularized organ endowed with multiple functions and complex characteristics, which can be used as valuable tools in ecotoxicological studies. However, the application of cutaneous biomarkers in amphibian research remains limited and scattered throughout the literature, which may hinder an integrated understanding of their potential as well as their possible limitations. Therefore, the aim of this study was to conduct a systematic literature review, critically analyzing scientific publications on cutaneous biomarkers that have been employed in ecotoxicological studies involving amphibians. To this end, a qualitative–quantitative systematic literature search was carried out, focusing on articles published between 1900 and 2024. Searches were performed using web-based search tools and scientific databases (Google Scholar, Scopus, Web of Science, PubMed, and ScienceDirect), applying specific combinations of keywords and selecting and classifying articles according to predefined eligibility criteria. The screening process resulted in 54 articles published worldwide, demonstrating that these specific types of biomarkers remain underestimated in scientific research. The geographical distribution of the studies revealed a predominance of publications from European and Latin American countries. Among the experimental models, adult-stage anurans were the most frequently used, and the sex of the individuals was not reported in most studies (74.1%). The results also showed a predominance of studies that did not report the anatomical region of the skin used as the source of cutaneous tissue samples (e.g., ventral, dorsal, lateral skin). Regarding ecotoxicological assay types, studies involving direct dermal exposure and acute exposure durations predominated, indicating a greater interest in simulating immediate effects in toxicological assays. The most frequently studied contaminant classes were agrochemicals and metals, reflecting a preference for more “classical” toxicants in toxicology, while emerging contaminants remained underrepresented, such as industrial residues (3.2%) and radiation (6.4%). The most commonly applied biomarker classes were physiological analyses (33.9%), followed by histological (32.2%) and morphological (18.6%) assessments, highlighting the relevance of the skin as one of the main routes of entry and absorption for various environmental compounds. Overall, our findings not only compiled and organized relevant ecotoxicological data for amphibian studies but also highlighted several methodological limitations that still need to be addressed in future research. It is expected that this compilation may serve as a robust and relevant foundation to encourage further studies to expand the application of cutaneous biomarkers as a promising tool in amphibian research.
Motivações e percepções de consumidores sobre veículos híbridos e elétricos: um estudo na região de Campinas/sp
(Universidade Federal de São Carlos, 2026-01-27)
Anastacio, Evelyn Rodrigues
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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/3545720742004188
This study aims to analyze the purchase motivations of consumers of hybrid and electric vehicles in the Campinas/SP region. A qualitative approach with an exploratory and interpretive character was adopted, grounded in theoretical frameworks from marketing, consumer anthropology, and sustainability studies. Data collection was conducted through semi-structured interviews with owners of these vehicles. In the specialized literature, electromobility is often associated with attributes of environmental sustainability. However, the results indicate that, in the context investigated, purchase decisions are predominantly driven by economic factors related to cost–benefit considerations, while technological attributes play a complementary role. Environmental sustainability proved to be secondary, being mobilized instrumentally within economic evaluations. The findings highlight a mismatch between green marketing discourses and the motivations effectively activated in consumer behavior within the field of electromobility.
Influência da adição de fibras no comportamento ao cisalhamento de vigas de concreto de alta resistência
(Universidade Federal de São Carlos, 2026-01-27)
Vaz, Viviane Visnardi
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Almeida, Ricardo Laguardia Justen de
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https://lattes.cnpq.br/7352278288074474
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https://orcid.org/0000-0002-4251-1146
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Parsekian, Guilherme Aris
The understanding of shear behavior in reinforced concrete beams is a relevant topic in structural engineering, especially with the introduction of fibers into the cementitious matrix, which increases the complexity of the resisting mechanisms but provides gains in ductility, residual strength, and crack control. Research has focused on conventional-strength concretes, leaving gaps regarding the performance of high-strength concretes (C55–C90) with diverse types and dosages of fibers and their behavior in beams without transverse reinforcement. This study investigated the contribution of fibers to the shear resistance of high-strength fiber-reinforced concrete (HSFRC) beams without stirrups and conducted a critical assessment of the applicability of the design equations of ABNT NBR 16935 (2021) for estimating the shear capacity of these beams, which are currently not addressed by the standard. The results were compared with recent international guidelines from Eurocode 2 (2023) (EC2) and the fib Model Code 2020 (2024) (MC2020). The experimental program included the mechanical characterization of C55, C70, and C90 concrete reinforced with steel fibers and macro-synthetic fibers (0.5% and 1.0%), comprising compressive strength, elastic modulus, residual flexural tensile strength, and direct shear strength tests using the JSCE-SF6 and push-off methods. HSFRC beams without transverse reinforcement were evaluated to evaluate the influence of concrete strength, fiber type, and fiber dosage on shear behavior. Digital image correlation (DIC) was employed in selected tests to analyze the cracking process. The results showed that fiber addition increased the cracking load, controlled crack opening, and enhanced shear resistance, particularly in the case of steel fibers. The direct shear test methods exhibited significant variability in their results, indicating the need for standardization. The analysis revealed that ABNT NBR 16935 (2021) tends to overestimate the shear capacity of HSFRC beams, whereas the EC2 and MC2020 formulations proved to be more conservative. A calibration of the EC2 equations was proposed, resulting in improved agreement with the experimental results and reduced dispersion. These findings provide a relevant contribution to Brazilian standardization, aligned with experimental evidence and international trends, enabling the safe and economical use of fiber-reinforced concrete in structural elements.