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Base de dados da pesquisa: não se brinca com coisa séria: o humor em discursos sobre a leitura
(Universidade Federal de São Carlos, 2026-06-10)
Silva, Jeniffer Aparecida Pereira da
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Curcino, Luzmara
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https://lattes.cnpq.br/6680592122128813
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https://orcid.org/0000-0003-2384-3943
Futebol feminino em perspectiva histórica: o machismo estrutural e a deslegitimação de Marta como rainha do futebol
(Universidade Federal de São Carlos, 2026-06-10)
Oliveira, Amanda Coelho Cruz Alves de
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Carvalho, Pedro Henrique Varoni de
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https://lattes.cnpq.br/0019513394358070
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https://orcid.org/0000-0002-1492-4891
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https://lattes.cnpq.br/6461637749237788
This study aims to analyze manifestations of hate speech directed at women’s football, especially toward the athlete Marta Silva, observing how these statements resume historically constructed meanings about the place assigned to women in sports. The research is based on the symbolic contradiction between the consecration of a “King of football” and the difficulty in legitimizing a “Queen of football”, focusing on comments about the athlete Marta Silva on social media. As a theoretical foundation, the concepts of statement and archive by Michel Foucault, the discussions on structural sexism by Pierre Bourdieu, and the concept of technodiscourse by Marie-Anne Paveau are used. The analysis demonstrates that many comments reproduce misogynistic discourses and reinforce historical inequalities still present in women’s football.
Alianças contingentes: identidade, ressentimento e redistribuição no movimento LGBTQIA+
(Universidade Federal de São Carlos, 2026-06-11)
Couto, Guilherme Pessatti do
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Sanchez, Fábio José Bechara
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https://lattes.cnpq.br/6423443695464907
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https://lattes.cnpq.br/0522025448915690
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Leite Júnior, Jorge
This dissertation investigates how the LGBTQIA+ Movement constitutes itself as a collective political subject in the context of the reopening of institutional channels for participation during the third government of Luiz Inácio Lula da Silva. The analysis takes as its empirical object the 4th National Conference on the Rights of LGBTQIA+ People, encompassing its state (São Paulo) and national stages, and combines participant observation with documentary analysis of the proposals approved throughout the conference process. The study is organized around three analytical axes: the forms of political articulation among the different subjects within the movement; the demands directed toward the State; and the internal dynamics of conflict and coalition. The first chapter examines identity as a theoretical problem, drawing on queer theory, debates on identitarianism, and the historical formation of the movement’s subjects. The second chapter analyzes conflicts observed in the field, with emphasis on the expansion of subjects named by the movement, disputes surrounding intersectionality as a political grammar, and resentment as a structuring affect of internal relations, especially between gay men and other political subjects. The third chapter examines the proposals produced at the Conference, mapping demands related to institutional advocacy, labor, education, combating violence, social protection, and health, as well as the tensions and consensuses involved in constructing a common agenda. The findings indicate that the identity politics of the LGBTQIA+ Movement cannot be reduced to a fragmentary dynamic; rather, it constitutes a field of disputes in which demands for recognition and redistribution are articulated in contingent ways. The notion of contingent alliances is proposed to describe coalitions formed not from a pre-existing shared identity, but from situated negotiation among differences and the perception of partially convergent interests. By historicizing the movement’s internal tensions and analyzing how resentment simultaneously fractures and fuels political mobilization, the research contributes to questioning interpretations that associate identity politics with the fragmentation of the progressive political field.
Monitoramento do desgaste de ferramentas de usinagem de painéis sanduíche por meio de análise de vibrações e microscopia
(Universidade Federal de São Carlos, 2026-06-11)
Perruci, Marcelo de Jesus
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Shiki , Sidney Bruce
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http://lattes.cnpq.br/0573973677787523
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https://orcid.org/0000-0001-9373-3630
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https://lattes.cnpq.br/3785044141613175
The application of composite materials has expanded across various areas of modern industry, driven by the search for lighter and stronger components. These materials exhibit characteristics such as high specific stiffness, corrosion resistance, and low mass, making them attractive to sectors such as automotive, naval, sports, wind energy, and biomedical segments. However, it is in the aeronautical industry that composite materials have the most significant use, being employed in the manufacture of fuselages, wings, and internal components, with the main purpose of reducing the total weight of aircraft, promoting greater fuel efficiency, increased flight range, and reduced emissions. The processing of these materials is largely carried out by CNC machining centers, equipped with cutting tools developed to handle the abrasiveness and heterogeneity of composites. Such tools have high development and acquisition costs and are subject to accelerated wear during the process, which reinforces the need for strategies that allow for maximum utilization of their service life without compromising the quality and integrity of the final product. In this context, this study proposes monitoring the condition of cutting tools through a combination of direct and indirect methods. The direct method employs geometric characterization of the cutting edges of the tools using microscopy, while the indirect method utilizes the analysis of mechanical vibrations captured by sensors integrated into the CNC machine spindle. The methodology consists of the periodic collection of vibration signals throughout the tool lifespan, followed by analysis of the cutting edge condition through microscopic image analysis. The correlation between vibration levels and wear conditions observed in the microscopy analyses highlights the potential for using this information together to build a predictive model for estimating the optimal tool usage time, contributing to greater production efficiency.
Restauração ecológica: monitoramento legal e estratégias de seleção de espécies frente a eventos climáticos extremos
(Universidade Federal de São Carlos, 2026-06-12)
Viveiros, Emerson
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Silva, José Mauro Santana da
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http://lattes.cnpq.br/1206055452889306
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https://lattes.cnpq.br/7626133122217528
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https://orcid.org/0009-0008-3174-8026
This thesis investigates key challenges to the success of ecological restoration in the context of climate change, integrating two complementary dimensions: the assessment of monitoring in restored areas and the selection of species that are more resilient to extreme climatic events. In the first chapter, the study critically analyzed the capacity of the monitoring model established by SMA Resolution No. 32/2014 to adequately represent the ecological condition of restoration projects when results are aggregated at the project level. Based on data from 12 projects distributed across 453 polygons in the Promissão Reservoir region, along the Tietê River (São Paulo State, Brazil), the study demonstrated high spatial heterogeneity in the legal indicators and highlighted the risk of masking critical areas, which may compromise the evaluation of legal compliance. In the second chapter, the thesis investigated how functional traits of plant species, such as leaf thickness, the presence of trichomes, and crown shape, influence frost tolerance in restoration areas, providing support for the selection of species better adapted to adverse climatic conditions. Taken together, the results show that restoration effectiveness depends both on monitoring criteria that are more sensitive to ecological variability and on the incorporation of species-selection strategies capable of increasing the resilience of restored plantings to extreme events. The thesis therefore contributes to the technical and scientific advancement of ecological restoration, with practical implications for planning, monitoring, and the formulation of public policies in Brazil.
Um território e suas complexidades e multiplicidades espaço-temporais: caracterização das condições ambientais e de qualidade de vida na Terra Indígena Tupiniquim (Aracruz - ES)
(Universidade Federal de São Carlos, 2026-06-12)
Martins, Yãnayá Pêgo
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Mattos, Sérgio Henrique Vannucchi Leme de
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https://lattes.cnpq.br/8205497519881678
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https://orcid.org/0000-0002-1874-8290
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Tupiniquim
Understanding contemporary environmental dynamics requires a complex systems perspective, in which the environment is conceived as a network of multiple interconnected components. The Tupiniquim Indigenous Territory, located in Aracruz, Espírito Santo, Brazil, exemplifies this complexity due to its intense historical and spatial transformations. This study aims to examine the dynamics between society and nature within this territory through a spatiotemporal assessment of environmental quality and quality-of-life indicators. The methodological approach was based on the Pressure–State–Response (PSR) framework, focusing exclusively on state indicators. Geographic Matrix analysis and Geographic Information Systems (GIS) were employed to conduct a comparative assessment of Brazilian Institute of Geography and Statistics (IBGE) census data from 2010 and 2022. The results revealed an uneven evolution in the provision of infrastructure and basic services across the territory. Water supply coverage through the public distribution network and solid waste collection services expanded substantially in several census sectors. However, public sewage network coverage remained limited or absent in most areas, reinforcing reliance on inadequate sanitation solutions. In the socioeducational dimension, the data indicated a percentage decline in literacy rates. This apparent decline primarily resulted from the methodological fragmentation of the territory in the 2022 Census, which increased the number of census sectors from seven to sixteen. This change improved the spatial resolution of the survey and exposed areas of long-standing vulnerability. In addition, intensive land-use classes, particularly mixed-use mosaics and pasturelands, expanded at the expense of native vegetation. The findings indicate that strengthening sustainability in the region requires the implementation of integrated territorial management strategies capable of promoting equitable access to basic services while addressing the urgent need for environmental conservation. Such measures are essential to safeguarding the autonomy, social cohesion, and cultural identity of Indigenous peoples.
Projeto de Monitoramento e Telemetria de um Sistema BAJA utilizando LoRa e RTOS
(Universidade Federal de São Carlos, 2026-06-12)
Marmirolli, Guilherme
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De Francisco, Carlos Alberto
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https://lattes.cnpq.br/1246572405382250
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https://orcid.org/0000-0001-6472-5957
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https://lattes.cnpq.br/8397038859893862
BAJA SAE vehicles operate in adverse off-road environments, subject to vibrations, impacts, and large distances from reference stations, which makes real-time monitoring challenging with conventional wireless communication technologies that impose significant range and robustness limitations. In this context, this work presents the development and experimental validation of an embedded monitoring and telemetry system for BAJA SAE vehicles, based on LoRa communication and Real-Time Operating System (RTOS) task management. The proposed system consists of a custom printed circuit board designed for the acquisition of engine rotational speed, vehicle speed, continuously variable transmission (CVT) temperature, and triaxial acceleration data, using Hall-effect sensors (A3144), a Type-K thermocouple with MAX6675 interface, and an MPU6050 accelerometer. Data processing is performed by an ESP32 microcontroller running FreeRTOS, with task distribution across its dual-core architecture to ensure efficient real-time operation. Wireless data transmission is carried out through the E220-900T22D LoRa module operating at 915 MHz, while local data logging is implemented through an SD card interface. Experimental validation demonstrated temperature measurement error within the manufacturerspecified tolerance of approximately 2 °C, coherent sensor responses for rotational speed and vehicle speed with minor delay and damping effects, and proper accelerometer operation for gravitational acceleration detection. Field tests of the LoRa communication link confirmed compliance with the 500 m range requirement imposed by BAJA competition conditions. Sending 18 bytes, it achieved packet loss rates below 5% and -85 dBm received signal strength at this distance using omnidirectional 6 dBi antennas. The results validate the proposed architecture and demonstrate its technical feasibility for real-time telemetry applications in BAJA SAE competitions.
Web currículo como possibilidade de uso dialógico das TDIC na EJA presencial no estado de São Paulo
(Universidade Federal de São Carlos, 2026-06-12)
Nogueira, Marcela Fontao
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Fernandes, Jarina Rodrigues
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http://lattes.cnpq.br/6612611612919706
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http://lattes.cnpq.br/7068478667644135
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https://orcid.org/0000-0001-5599-9366
The integration of digital information and communication technologies (ICTs) into teaching and learning processes in Youth and Adult Education (EJA) is an ethical and urgent issue, given the structuring nature of ICTs in contemporary society, within a context of profound inequalities. The general objective of this research was to contribute to the understanding of possibilities for integrating ICTs into teaching and learning processes with young people and adults, starting from the teacher's perspective and aiming for a dialogical education. The specific objectives were: i) to investigate educational public policies adopted by municipalities in the state of São Paulo during the COVID-19 pandemic regarding the use of ICTs; ii) to identify the uses of ICTs in the daily lives of teachers in pedagogical practices before the pandemic, during the period of remote activities, and upon returning to in-person activities; iii) to recognize the dialogical use of ICTs in pedagogical practices in EJA. The theoretical framework was anchored in Paulo Freire's constructs that focus on dialogical and emancipatory education, as well as in authors who propose the integration of ICTs into basic education based on the contributions of dialectical materialism. To this end, a qualitative research study was conducted, of a bibliographic, documentary, and empirical nature, with fourteen teachers from twelve municipalities in the state of São Paulo. In the field research, the instruments used were an on-line questionnaire and a semi-structured interview. As a result, we identified that during the pandemic, the education departments of the municipalities analyzed did not provide adequate infrastructure for the development of teaching work in relation to the use of ICT during the period of emergency remote teaching (ERT); upon returning to in-person activities, there was an increase in the use of digital technologies, both in terms of frequency and types of devices; and finally, beyond the integration of ICT into teaching and learning processes, the participants in this study were dialogical in their pedagogical practices with the use of ICT, in search of the unprecedented viable.
Implementação da metodologia lean em uma instituição de ensino superior pública: revisão de literatura e estudo de caso.
(Universidade Federal de São Carlos, 2026-06-12)
Almeida Junior, Antonio Tadeu de
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Lizarelli, Fabiane Letícia
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http://lattes.cnpq.br/4525431419326559
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https://orcid.org/0000-0002-8959-9982
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http://lattes.cnpq.br/3906401395048893
This dissertation investigates the application of the Lean methodology in several Higher Education Institutions (HEIs), combining a systematic literature review with a proposal for practical implementation in the diploma issuance process at a public university. Given the growing interest in the application of Lean and Lean Six Sigma (LSS) in service environments, including the educational sector, this work aims to identify processes that benefit from its application, the tools used, the barriers faced, and strategies for overcoming them. The first stage consisted of a Systematic Literature Review (SLR), conducted in the Scopus and Web of Science databases, resulting in the analysis of 88 articles, of which 48 empirical studies were selected to answer the research questions. The analysis allowed for mapping the areas of application, the types of projects developed, the most frequently used tools, and the adjustments made for the context of HEIs. The second stage proposes the application of Lean in the undergraduate diploma issuance process, using a case study in a public HEI, seeking to evaluate gains in efficiency, response time, and waste reduction. This research contributes to the consolidation of knowledge about Lean in higher education, especially in the public sector, and provides support for managers interested in improving academic and administrative processes in HEIs.
Democracia, comunicação científica e plataformas digitais: as artes como mediação ética e transformadora do conhecimento
(Universidade Federal de São Carlos, 2026-06-15)
Manzini, Mariana
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Ribeiro, Renilson Rosa
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http://lattes.cnpq.br/4919452710416508
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https://orcid.org/0000-0002-2809-1376
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http://lattes.cnpq.br/2471152208842772
This article discusses the relationships between democracy, scientific communication, and the arts, analyzing how artistic practices can function as forms of mediation, humanization, and democratization of knowledge in contemporary contexts marked by structural inequalities and the logic of digital platforms. Drawing on an interdisciplinary approach, it brings together contributions from communication studies, sociology, philosophy, anthropology, and critical education to examine the effects of contemporary capitalism on emotions, knowledge production processes, and regimes of symbolic circulation. The text mobilizes the song “Marujo” by the band Puro Suco, as well as elements of Brazilian popular culture, especially the figure of Iara, as metaphors for the experience of knowledge understood as a collective journey, traversed by tensions, displacements, and possibilities of social transformation. It argues that scientific communication must move beyond strictly technical models, incorporating cultural, aesthetic, and emotional dimensions capable of broadening access to knowledge, strengthening democratic practices, and fostering more inclusive forms of social participation.
Polarização política no Brasil e redes sociais: uma análise do Twitter/X como formação de bolhas ideológicas
(Universidade Federal de São Carlos, 2026-06-15)
Maiochi, Julia Eduarda
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Ribeiro, Renilson Rosa
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http://lattes.cnpq.br/4919452710416508
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https://orcid.org/0000-0002-2809-1376
This study investigates the hypothesis that the use of Twitter/X contributes to the intensification of political polarization in Brazil by fostering the formation of ideological bubbles and the circulation of polarized content. Its main objective is to analyze how the platform’s algorithmic architecture influences the quality of public debate and democratic foundations within the Brazilian context. The research adopts a qualitative and interpretive approach, based on a bibliographic review of national and international academic literature in the fields of political communication, digital platforms, democracy, and polarization. The discussion is grounded in the concept of surveillance capitalism to understand how algorithmic personalization and the attention economy encourage homogeneous information environments, often referred to as echo chambers. The findings indicate that Twitter/X acts as a catalyst for political polarization by privileging emotionally engaging content and facilitating the circulation of polarized and disinformative narratives. It is concluded that the platform significantly contributes to the strengthening of rigid political identities and to the fragmentation of the democratic public sphere.
Diagnóstico de influência e validação em modelos não lineares com efeitos mistos
(Universidade Federal de São Carlos, 2026-06-15)
Pinheiro, Camila Xavier Sá Peixoto
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Russo, Cibele Maria
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http://lattes.cnpq.br/1011098065426388
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http://lattes.cnpq.br/0093205921769184
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Russo, Cibele Maria
Nonlinear mixed-effects (NLME) models are a widely used statistical tool for modeling data with hierarchical structure and nonlinear relationships among variables. Despite their flexibility, the adequacy and robustness of NLME models depend on careful evaluations of the influence of individual observations and the predictive performance of the fitted models. This thesis develops and evaluates methods aimed at influence diagnostics and validation of NLME models. Initially, results are presented for local influence diagnostics in nonlinear mixed-effects models under the Scale Mixture of Skew-Normal (SMSN) family of distributions, where several perturbation schemes are applied to analyze model sensitivity using two pharmacokinetic datasets. Subsequently, a systematic analysis of different validation methods for normally distributed NLME models is developed, comparing error and variability measures across resampling schemes. Finally, new diagnostic approaches are proposed for NLME models under the normal distribution. The results contribute to improving predictive assessment and influence analysis in nonlinear mixed-effects models.
Patrimônio cultural na região metropolitana de São José do Rio Preto (SP): diagnóstico territorial e análise das políticas públicas
(Universidade Federal de São Carlos, 2026-06-16)
Maltarolo, Maria Heloísa
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Guimarães, Camila Ferreira
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http://lattes.cnpq.br/7623330251944001
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https://orcid.org/0000-0002-6776-588X
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Miyasaka, Elza Luli
The intensification of urbanization and metropolitanization in Brazil has led to socio-spatial changes and the emergence of new urban demands, including growing concern with cultural and historical heritage assets, which culminated in a national heritage-making process. Contemporary society draws upon the past to shape its identity in the present, selecting and aligning memories with current values and objectives, so that cultural heritage encompasses diverse dimensions and principles, expressed through both tangible and intangible forms. This research aims to analyze the cultural heritage of the Metropolitan Region of São José do Rio Preto (MRSJRP) through a territorial diagnosis and an analysis of public preservation policies, seeking to understand the spatial distribution of cultural heritage assets, the existing protection instruments, and the challenges associated with heritage management at the metropolitan scale. The research is justified by the need to bring together the agendas of metropolitan planning and cultural heritage preservation, which have historically been addressed separately. In this context, the bibliometric analysis identified an increase in scientific production on heritage and metropolitan regions over the past five years and points to a research gap that remains insufficiently explored. The methodological strategy adopted consists of a case study and a qualitative approach, combined with theoretical and empirical research and cartographic analysis. These procedures enabled an understanding of the socio-spatial dynamics within which the region's cultural heritage assets are embedded. The results demonstrate that, although administrative structures dedicated to culture exist, mechanisms for the recognition, preservation, and protection of cultural heritage in the municipalities of the metropolitan region remain insufficient and fragmented. Challenges in urban legislation and limited social participation hinder the integration of heritage preservation, urban planning, and regional development, highlighting the need for more integrated cultural public policies that are responsive to the territorial specificities of the MRSJRP.
Otimização e validação de métodos por cromatografia gasosa com detector de ionização por chama (GC-FID) para determinação de alcanos: uma revisão bibliográfica
(Universidade Federal de São Carlos, 2026-06-16)
Santos, Isabela Pereira dos
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Schio, Natali
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http://lattes.cnpq.br/9916003002438166
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Fadini, Pedro Sérgio
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http://lattes.cnpq.br/3255060531838427
Alkanes constitute an important class of hydrocarbons widely used in environmental, petrochemical, and petroleum contamination monitoring studies. In this context, gas chromatography coupled with a flame ionization detector (GC-FID) stands out as one of the main techniques employed for the determination of these compounds due to its high selectivity, sensitivity, and reproducibility. The present study aimed to conduct a literature review on the optimization and validation of analytical methods using GC-FID for the determination of alkanes in different matrices. To achieve this, studies published in the scientific literature addressing parameters related to sample preparation, chromatographic conditions, and analytical validation criteria were analyzed. The results demonstrated that the optimization of factors such as oven temperature, carrier gas flow rate, and extraction conditions, that is, sample preparation procedures, directly influences the analytical performance of the method, contributing to improvements in chromatographic separation, sensitivity, reduction of analysis time, and minimization of matrix effects, thereby enhancing analyte quantification. The reviewed studies also highlighted the importance of employing statistical optimization tools, which enabled the simultaneous evaluation of multiple experimental variables and their interactions. Furthermore, the applicability of alkane determination in different matrices was observed, including environmental and food samples, highlighting its potential for hydrocarbon characterization in water, soil, and sediment samples, petroleum contamination monitoring, and authentication of products such as vegetable oils. In addition, the reviewed studies presented satisfactory results for validation parameters, including linearity, limits of detection, and limits of quantification, demonstrating the reliability of the technique. It can be concluded that GC-FID is an efficient analytical tool for the determination of alkanes, and that method validation is essential to ensure the quality and reliability of the obtained results.
Caracterização e aplicação da lignina da palha de milho como coagulante e auxiliar de coagulação orgânico na remoção da turbidez de água
(Universidade Federal de São Carlos, 2026-06-16)
Diniz, Joice Pereira
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Gonzalez, Beatriz Cruz
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https://lattes.cnpq.br/4777395189579793
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Matos, Andreia Pereira
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https://lattes.cnpq.br/6155202940087696
Water treatment plants (WTPs) are critical components of a municipality’s water supply system; they consist of the operational steps involved in treating surface water to ensure its quality and potability. One of these essential steps is coagulation, in which aluminum sulfate is commonly used. This coagulant presents both operational advantages and disadvantages for WTPs, raising the possibility of using plant-based polymers, such as lignin from corn stover. The objective of this study was to extract, modify, and apply lignin from corn stover as a coagulant and coagulation aid for turbidity removal. Extraction was performed using the soda pulping method, followed by chemical modification through oxidation with hydrogen peroxide. To validate the effects of the modification, the lignin was characterized using Ultraviolet-Visible Spectroscopy (UV-Vis), Nuclear Magnetic Resonance (¹H NMR), Thermogravimetric Analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and Energy-Dispersive X-ray Spectroscopy (EDS). Synthetic water was prepared, and batch Jar Tests were conducted using aluminum sulfate and lignin as primary coagulants to determine the optimal dosages for removal; subsequently, aluminum sulfate and lignin were applied as coagulation aids using the analysis of variance (ANOVA) methodology. The optimal dosages of aluminum sulfate were 80 mg. L⁻¹ for a settling time of 10 minutes and 50 mg. L⁻¹ for a settling time of 30 minutes; the lignins had no significant effect on turbidity removal, and their role as a coagulation aid was also ineffective, as confirmed by ANOVA with hypothesis testing (p-value > 0.05). Therefore, it was concluded that lignin was not capable of removing turbidity from the synthetic water within the predetermined times in the Jar Test. It is recommended that future studies use a turbidity level close to 100 NTU and evaluate the effects of lignin by altering the operational conditions of the Jar Test, such as pH.
A potencialização do jogo Jenga para o ensino da matemática: Geojenga
(Universidade Federal de São Carlos, 2026-06-17)
Albieri, Cristiane Janasi
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Salvador, José Antonio
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https://lattes.cnpq.br/2487171069472158
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https://orcid.org/0000-0003-3217-5035
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http://lattes.cnpq.br/5500914294114841
This dissertation analyzes the relevance of playful activities, such as games, in the educational process, understanding them as fundamental tools for the construction of mathematical knowledge and demonstrating greater student engagement. It highlights the Mathematics Teaching Laboratory (LEM) as the primary physical and institutional space for the conception, development, and execution of these playful practices.The study presents the process of creating and implementing the LEM within the school environment, emphasizing its role as a pedagogical innovation that integrates theory and practice.The central focus of this work is geometry, which led to the development of the game GeoJenga—an adaptation and enhancement of the traditional game Jenga, specifically designed for teaching geometry.In addition to addressing plane and spatial geometry, the study illustrates a transition from geometry to arithmetic and algebra by exploring patterns, ultimately leading to the topic of Arithmetic Progression (AP).
LiDAR no setor florestal: cubagem de pilhas de madeira e ferramenta para diagnóstico de árvores urbanas
(Universidade Federal de São Carlos, 2026-06-17)
Paula Santos, Maria Inês Corrêa de
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Reis, Cristiano Rodrigues
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http://lattes.cnpq.br/0033061087532936
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Thiersch, Cláudio Roberto
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http://lattes.cnpq.br/8791966697254106
The measurement and monitoring of forest resources depend largely on costly field methods that are sample-based and subject to the evaluator's subjectivity, whether in quantifying timber stocks or in diagnosing urban trees. In this context, computer vision—and, in particular, LiDAR (Light Detection and Ranging) technology, now available in portable, affordable devices—emerges as an alternative capable of replacing visual estimates with instrumental measurement. Accordingly, the objective of this study was to evaluate the application of computer vision in the forestry sector, using LiDAR in three contexts: mapping the state of the art, developing a method for scaling log piles, and characterizing urban trees for fall-risk analysis. The systematic review, conducted in the Web of Science and Scopus databases following the PRISMA protocol, identified 4,418 documents, of which 155 articles met the final eligibility criteria. A marked increase in publications was observed from 2019 onward, distributed across five themes: tree species classification (50 articles), forest monitoring (41), tree parameter measurement (26), tree segmentation and counting (20), and defect detection (18). Authorship was concentrated in China and the United States. A method was then developed for the volumetric estimation of Eucalyptus sp. log piles from point clouds obtained with an iPhone 14 Pro and a Hand-held Mobile Laser Scanner (HMLS). The method comprised noise removal, normalization, estimation of the face area by concave hull, and adaptive voxelization to calculate the stacking factor, with automation in a web application developed in the R language. Errors relative to the reference measurement ranged from −6.8% to +8.3%, all within the acceptable range. Finally, the HMLS was applied to the diagnosis of urban trees in a public square in the municipality of Piedade, São Paulo, through an adaptation of the TRAQ (Tree Risk Assessment Qualification) protocol. Of the 19 individuals evaluated, DBH ranged from 14.7 to 91.4 cm and the mean stem inclination was 5.24°, with only two individuals in the attention range. It is concluded that the use of portable LiDAR constitutes a viable, replicable, and low-cost alternative to conventional procedures, as it enables the assessment of timber stocks without exposing the operator to risks and objectifies the geometric parameters of arboreal risk analysis.
Blockchain adoption readiness in supply chain networks: a design science-based assessment model
(Universidade Federal de São Carlos, 2026-06-17)
Moraes, Katherine Kaneda
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Ganga, Gilberto Miller Devós
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https://lattes.cnpq.br/9062191157466610
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https://orcid.org/0000-0001-9328-5727
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https://lattes.cnpq.br/8018778062402678
Blockchain technology has attracted significant interest in supply chain management due to its potential to enhance transparency, traceability, and interorganizational coordination. Despite its promise, blockchain adoption in supply chain networks remains limited, largely due to the complexity of decision-making and the multidimensional nature of adoption challenges. Existing research has predominantly focused on identifying isolated barriers or success factors, offering limited guidance on how organizations can systematically assess their readiness before committing to implementation. The objective of this PhD thesis is to advance the understanding and assessment of organizational readiness for blockchain adoption in supply chain networks and to translate this knowledge into a decision-oriented evaluation model. To address this problem, the thesis adopts an article-based research design composed of four cumulative studies. The first two studies investigate technological and non-technological barriers to blockchain adoption in supply chains and the strategies proposed to mitigate them, with particular attention to adoption stages and stakeholder characteristics. The third study addresses the methodological problem of how readiness models for emerging digital technologies in operations and supply chain management should be designed and structured, resulting in a Design Science Research-based reference architecture. The fourth study builds on the preceding findings to design, develop, and evaluate an organizational readiness assessment artifact for blockchain adoption, employing fuzzy logic to operationalize readiness conditions and provide an interpretable overall readiness classification. The results of the thesis contribute to the literature by consolidating and structuring readiness conditions for blockchain adoption from technological, organizational, environmental, and interorganizational perspectives, and by demonstrating how existing theories can be consciously adapted to this context. Methodologically, the thesis contributes a systematic approach for developing readiness models and a validated readiness assessment artifact. From a practical perspective, the proposed model helps organizations assess their readiness to adopt blockchain, identify critical areas for improvement, and avoid premature implementation decisions. Overall, the thesis bridges conceptual discussions of blockchain adoption with actionable readiness assessment for supply chain networks.
Potencialidades da técnica libs e da análise multivariada na triagem de metais potencialmente tóxicos em bijuterias: uma revisão bibliográfica
(Universidade Federal de São Carlos, 2026-06-18)
Araujo, Thaila
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Pereira Filho, Edenir Rodrigues
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https://lattes.cnpq.br/3394181280355442
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https://orcid.org/0000-0003-0608-0278
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https://lattes.cnpq.br/8973532929810369
The growing commercialization of low-cost jewelry and ornaments has raised public health concerns due to the presence of potentially toxic metals, such as lead (Pb) and cadmium (Cd), in concentrations that frequently exceed regulatory limits. Given the limitations of conventional analytical techniques, such as the slow turnaround of Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) and the low stratigraphic sensitivity of X ray fluorescence (XRF), Laser-Induced Breakdown Spectroscopy (LIBS) emerges as a promising alternative. This work presents a bibliographic review on the use of LIBS for identifying contaminants in jewelry, based on studies that demonstrate the technique's effectiveness in complex metallic matrices, such as waste electrical and electronic equipment (e-waste). The essential role of chemometrics is discussed to mitigate the matrix effect and enable the recognition of compositional patterns. The review indicates that the ability to perform depth profiling allows for the distinction between surface coatings and the actual composition of the pieces' core, preserving the aesthetic integrity of the ornament. It is concluded that the integration between plasma physics and multivariate analysis algorithms establishes LIBS as a strategic Green Analytical Chemistry tool, with high potential for application in health surveillance systems and rapid market screening.
Projeto de dispositivo semiautomático para polimento de insertos em politriz metalográfica
(Universidade Federal de São Carlos, 2026-06-18)
Ribeiro, João Guilherme dos Santos
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Ventura, Carlos Eiji Hirata
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https://lattes.cnpq.br/1689198421096127
The technological advancement of machining processes and the increasing demand for dimensional accuracy require high-performance cutting tools with extended service life. However, cutting tools that are not properly prepared reduce process efficiency, leading to increased energy consumption and higher production costs. Individual insert preparation can be performed manually using a metallographic polishing machine. Nevertheless, the manual procedure presents inherent limitations, including low repeatability and a strong dependence on the operator’s experience to control variables such as contact pressure, polishing speed, and contact time, resulting in geometric inconsistencies that accelerate tool wear. This study presents the conceptual design of a semi-automatic device for polishing cutting inserts using a metallographic polishing machine, aiming to address this technological gap. The adopted methodology comprised a review of abrasive finishing processes, cutting tool manufacturing methods, and tool materials, followed by the establishment of design requirements based on the ALP-2 metallographic polishing machine (Alcrisa). The proposed device is based on a mechanism analogous to a slider-crank system. It is driven by a 25 W electric motor equipped with a gear reducer and a variable frequency drive (VFD), enabling precise control of the insert translational speed during polishing. The normal force is applied through a spring-loaded assembly consisting of a screw and compression spring, designed to provide a contact pressure ranging from 10 to 20 N/cm². The supporting structure was designed in aluminum to ensure adequate mechanical strength and corrosion resistance. The design results demonstrate the feasibility of a simple system capable of standardizing the polishing process on a metallographic polishing machine while controlling key process parameters, such as normal force and translational speed, thereby providing greater operational repeatability than manual polishing. As this study is limited to the conceptual design stage, prototype fabrication and experimental validation of the proposed device are recommended for future work.