Browsing by Issue Date, starting with "2024-07-29"

Filter results by year or month

Now showing 1 - 20 of 3505

Identificação de padrões de viagens urbanas por meio de análise espacial: estudo de caso de Araraquara, SP
(Universidade Federal de São Carlos, 2024-07-29)
Oliveira, Rafael Augusto de
;
Guerreiro, Thais de Cassia Martinelli
;
https://lattes.cnpq.br/2650555786682535
;
https://lattes.cnpq.br/3042103539298188
;
https://orcid.org/0000-0002-8019-3273
Urban mobility has been becoming increasingly important for the operation of cities, currently the greatest expressions of the human organization of life in society. As is related to the access to the various opportunities offered and daily activities in the urban environment, the growing interest in its planning has been consolidating, while its importance and complexity is beginning to be understood. In Brazil, urban mobility planning is the object of Urban Mobility Plans, mandatory for all municipalities with more than 20,000 inhabitants and that also have to elaborate Master Plans. In this context, the city of Araraquara, in the interior of São Paulo, in the process of its Urban Mobility Plan review, had several studies capable of diagnosing the conditions of transport, travels and mobility in its territory. In order to continue these papers, this research aims to apply spatial analysis and spatial statistics techniques to identify and understand patterns related to population travels. Using a Geographic Information System (GIS), a statistical computing environment and a spatial data analysis software, the data collected in the Origin-Destination Survey (O/D) conducted between 2020 and 2021 were used. The analyzes seek to complement previous papers, considering the spatial aspects of income, age, gender, reasons for travel and level of education related to travels using different modes of transportation. The results indicate that the significant distributions of each variable are similar to the distributions of trips as a whole, mostly around the central region and its surroundings, which proves to be a solid urban nucleus. Other secondary and emerging centers are identified in peripheral regions, mainly using alternative modes to the car. In fact, the analyzes can contribute to obtaining additional subsidies for public policies and urban mobility planning in Araraquara.
Mulheres negras na gestão da educação pública na prefeitura de Guarulhos
(Universidade Federal de São Carlos, 2024-07-29)
Nascimento, Gleicy Lopes
;
Rodrigues, Tatiane Cosentino
;
https://lattes.cnpq.br/8361431964064731
;
https://orcid.org/0000-0002-4402-2805
;
https://lattes.cnpq.br/3143604340056359
Although women dominate the management of public education in the municipality of Guarulhos, the representation of Black women in decision-making and leadership roles remains disproportionately low. Furthermore, there is a lack of research addressing the barriers these women face in accessing such positions. The intersection of gender, race, and class plays a crucial role in shaping the life trajectories of Black women, particularly in relation to their access to the labor market. This exploratory, qualitative study aims to map the presence of Black women in leadership roles within the school management system in Guarulhos. The second phase of the research, which builds upon the mapping, involves interviews designed to explore their personal trajectories, as well as their political and pedagogical actions within these management spaces. The central hypothesis of this study is that Black women view education as a platform for struggle, empowerment, and resistance, thereby reimagining the role of school management.
Indexação de dados de pesquisa pelo autor científico: análise de diretrizes de sistemas de autoarquivamento do Brasil, Espanha e Portugal
(Universidade Federal de São Carlos, 2024-07-29)
Lopes, Cesar Augusto
;
Dal'Evedove, Paula Regina
;
https://lattes.cnpq.br/1170937498266968
;
https://orcid.org/0000-0003-1521-2201
;
https://lattes.cnpq.br/2800049940351083
Unrestricted access to research data in digital repositories represents one of the pillars of Open Science. In this context, the proper assignment of thematic metadata during the archiving of such data is crucial, as it facilitates their retrieval and reuse. To ensure the effectiveness of this process, digital repositories, especially those that allow self-archiving practices, must provide scientific authors with documents containing clear guidelines for the assignment of descriptor terms and keywords to deposited data. Based on this premise, the following question arises: How do the guidelines of research data repositories linked to Brazil, Spain, and Portugal guide scientific authors in assigning keywords during the self-archiving process?. The main objective of this study is to analyze the guiding criteria present in the guidelines for the indexing of research data in digital repositories associated with these three nations, aiming to contribute to the formalization of more structured and transparent indexing procedures. The research adopts an applied, qualitative, descriptive, and exploratory approach, with bibliographic and documental data collection. The research universe consisted of digital repositories identified in the re3data directory. The analysis of documents from 21 (twenty-one) repositories qualified for investigation revealed that none of these self-archiving systems provides a formal document specifically titled "Indexing Policy" that addresses the thematic content representation of research data. Although such a document was not made available, it could serve as a basis for the development of complementary materials, such as Indexing Manuals, Self-Archiving Guides, and Instructions for Assigning Keywords. To meet the research objective, 15 (fifteen) guiding criteria for the assignment of keywords were identified and analyzed, defined based on the theoretical framework of the study and observations from the analyzed documents. It was found that the guidelines of the examined repositories do not comprehensively address all the essential aspects of effective keyword assignment by scientific authors. The instructions provided are often superficial and lack depth and relevance, with documents that do not present sufficiently structured and clear procedures. The study concludes that improving the quality of guiding documents for indexing, especially in self-archiving practices, should be a priority for the institutions responsible for managing these repositories. The criteria presented in this research can serve as a foundation for creating more efficient and robust documents capable of more accurately guiding scientific authors in the thematic representation of their research data.
Sistema de manutenção preditiva para eixos mecânicos em ambientes industriais
(Universidade Federal de São Carlos, 2024-07-29)
Bezerra, Felipe Gomes
;
Fontes, João Vitor de Carvalho
;
https://lattes.cnpq.br/9473668144091435
This work presents a methodology for calculating the lifecycle of mechanical shafts using the SN (Stress-Number) diagram, with a focus on implementing effective predictive maintenance. Traditionally, industrial maintenance was reactive, addressing failures only after their occurrence, which resulted in high costs and unexpected downtimes. Predictive maintenance, however, allows for the prediction of fatigue failures based on statistical analyses and past performance, facilitating timely interventions and extending the lifespan of components. The developed methodology involves the collection of geometric and material data of the shafts, application of loads, and performing stress and strength calculations. Using the SN diagram, the system predicts the durability of the shafts and stores this information in a continuously updated database. This database allows for accurate and predictive analysis of the components' condition, aiding in the identification of critical points and in planning maintenance interventions before catastrophic fatigue failures occur. The developed system not only contributes to the reduction of operational costs but also improves the efficiency and safety of industrial operations. By implementing a robust solution for the predictive maintenance of mechanical shafts, this work establishes a solid foundation for future research and advancements in the field of industrial maintenance.
Percepções dos servidores técnico-administrativos em educação sobre o teletrabalho na Universidade Federal de Mato Grosso
(Universidade Federal de São Carlos, 2024-07-29)
Zanini, Iolanda Francione
;
Assis, Karina Gomes de
;
https://lattes.cnpq.br/4058077286734344
;
https://lattes.cnpq.br/2754729576554332
This work aims to identify perceptions of technical-administrative employees about work, considering the teleworking pilot project at the Federal University of Mato Grosso. The pilot project was part of the initial phase of the implementation of the Brazilian Federal Government's Management and Performance Program (PGD), started in December 2022 and completed in the second half of 2023. For the analysis, a literature review was carried out on the transformations of the work, transformations in public administration in Brazil and the type of teleworking in the public and private, national and international context. An analysis of the perception of technical-administrative employees participating in the pilot project and their managers regarding teleworking was also carried out from a qualitative perspective. The results showed that teleworking is a reality that will continue to expand in the public service. The perception of employees involved in the pilot project at the Federal University of Mato Grosso (UFMT) indicated benefits in this new work organization, as well as problems to be overcome. The study proves to be relevant for developing knowledge about the consequences of implementing teleworking, as well as its potential and limitations in the context of a public higher education institution.
Participação no judiciário: (in)efetividade das ações populares e das ações civis públicas ajuizadas por associações na seara ambiental
(Universidade Federal de São Carlos, 2024-07-29)
Ribeiro, Elen Pessoa de Queiroz
;
Amarante Júnior, Ozelito Possidônio de
;
https://lattes.cnpq.br/7857430001310706
;
https://orcid.org/0000-0001-9604-9463
;
Oliveira, Celso Maran de
Citizen Lawsuits and Public Civil Actions, validate participatory democracy and, therefore, allows the achievement of environmental justice. Control made by the population should not only guarantee the protection of fundamental rights brought by the 1988 Federal Constitution, but, also, allow the will of the community to be respected. It reflects the Social State, whose freedoms granted to citizens allow the formation of critical thinking that transcends the individual. In this sense, the present research aimed to answer the following question: are Citizen Lawsuits and Public Civil Actions effective legal instruments that allow individuals, in the exercise of citizenship, to successfully protect the environment? To answer this question, data regarding Citizen Lawsuits and Public Civil Actions, in the state of São Paulo, in the period from 2015 to 2022, was collected in the National Register of Collective Actions of the National Council of Justice. The information found was analyzed according to the concepts of efficiency, effectiveness, according to the principle 10 of the Rio de Janeiro Declaration about Environment and Development and Sustainable Development Goal number 16 (SDG 16), which brings popular participation, access to justice and access information as essential elements to occur environmental protection by society. This research aimed to understand how these constitutional instruments were used: who were the protagonists in their use and how their treatment is carried out, once they have entered judiciary system. The data found showed that, in addition to the low number of Public Civil Actions, which were filed by associations, Popular Action also proved to be an underused instrument. The absence of popular participation is not the only factor that would explain these results: the conduction of the legal process itself also proved to be a limiting factor that discourages the use of these instruments.
Suporte de nanopartículas de metais de transição para desenvolvimento de materiais antimicrobianos
(Universidade Federal de São Carlos, 2024-07-29)
Libero, Laura Ordonho
;
Mascaro, Lucia Helena
;
https://lattes.cnpq.br/9130022476352844
;
https://orcid.org/0000-0001-6908-1097
;
https://lattes.cnpq.br/0642912938020671
The control of diseases caused by highly contagious microorganisms is a current global challenge, where mass vaccination has shown a positive impact but faces limitations in terms of development and availability. During the COVID-19 pandemic, the need for rapid interventions, such as lockdowns and mask usage, highlighted the importance of effective decontamination strategies. Recent studies indicate that metal nanoparticles and transition metal oxides can be a promising solution, with physicochemical properties that enable the effective elimination of pathogens. However, to ensure better applicability, the use of biopolymer chitosan is of extreme interest, as it presents biocompatibility and antimicrobial activity. Therefore, this work aims to present synthesis methods related to nanoparticles, the mechanisms associated with biocidal action, as well as the possible applications of these as surface coatings, food packaging, among others.
Fotocatalisadores modificados baseados em PHI para oxidação do álcool alílico para ácido acrílico
(Universidade Federal de São Carlos, 2024-07-30)
Costa, Danielly Tamires da Silva
;
Teixeira, Ivo Freitas
;
https://lattes.cnpq.br/9782517948999001
;
https://orcid.org/0000-0002-4356-061X
;
https://lattes.cnpq.br/4070759896367717
The production of plastics in the petrochemical industry significantly contributes to greenhouse gas (GHG) emissions, being responsible for 17% of global industrial emissions. In contrast, biomass, when used sustainably, is carbon-neutral because the carbon released during its combustion is used by plants in the photosynthesis process. Carbon nitrides are known as photocatalysts capable of promoting the oxidation of alcohols, including the conversion of aromatic alcohols to carboxylic acids under controlled conditions. However, the photooxidation of allyl alcohol to acrylic acid using carbon nitrides as catalysts has never been reported in the literature. In this study, we investigate the oxidation of allyl alcohol to produce acrylic acid using H-PHI, a crystalline carbon nitride with potential applications in oxidative reactions. The synthesis of the photocatalyst, based on crystalline carbon nitrides of the type (poly (heptazine imide) sodium (Na-PHI) followed procedures well reported in the literature. A series of catalysts with different degrees of protonation (H-PHI) were synthesized via controlled protonation of Na-PHI. The obtained catalysts were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR) and UV-spectroscopy. These catalysts were tested in photooxidation reactions of allyl alcohol to acrylic acid. Different variations in the reaction medium were explored, including solvent, amount of catalyst, and oxygen pressure as the oxidizing agent. These catalysts not only achieved high efficiency in conversion but also maintained excellent selectivity for the desired product. H- PHI catalysts proved to be more efficient than metal-doped PHI-based catalysts. Therefore, the results obtained demonstrate that protonated carbon nitrides (H-PHI) are a highly efficient and sustainable alternative to traditional catalysts, such as Mo8V2WOδ/SBA-15. Additionally, they are efficient at room temperature and low pressures. Our results indicate up to 100% selectivity for acrylic acid and 70% conversion using water as a solvent at room temperature.
Simulação computacional da prensagem de pós para a previsão de falhas em compactos verdes
(Universidade Federal de São Carlos, 2024-07-30)
Furlan, Matheus
;
Sciuti, Vinicius Fiocco
;
https://lattes.cnpq.br/0230261917656691
;
https://orcid.org/0000-0002-3709-3189
;
Canto, Rodrigo Bresciani
Numerical simulation is a powerful tool for reducing production costs and improving dimensional tolerance and mechanical properties of parts produced by powder pressing. The prediction of mechanical properties in green compacts, during and after compaction, is crucial for ensuring part integrity in subsequent processes, such as green machining and sintering. However, failure prediction in green compacts is a field yet to be explored. Additionally, the constitutive models used to represent the mechanical behavior of the powder calls for various calibration procedures. In this context, this project aims to explore the use of experimental procedures and numerical simulations to predict failures in green compacts. To do so, closed-die pressing tests were conducted using an instrumented die equipped with strain gauges, pistons with axial sensors, an axial load cell, and an LVDT sensor. The experimental signals were compared with their numerical counterparts to adjust the parameters of the Drucker-Prager/Cap (DPC) constitutive model, based on parameters obtained from the literature. Two materials were evaluated: alumina powder and PTFE powder. After these adjustments, rubber multiaxial pressing (RMP) tests were planned via numerical simulations, aiming at a geometry/condition in which pinching of the elastomeric mold occurs on the green compact. Experimentally, fractures were observed for both materials. By post-processing the simulation results of these RMP tests, it was possible to validate the DPC model as an indicator of the failures observed experimentally, despite the model's development for simulating material consolidation. The agreement was higher for greater pressure and density levels, and for alumina powder. Thus, the use of DPC models during pressing simulations may provide valuable information about certain conditions and regions that might experience failure, which can be directly applied to rubber mold projects for isostatic pressing and rubber multiaxial pressing.
Aumento da resistência à corrosão por refusão a laser do aço 316L
(Universidade Federal de São Carlos, 2024-07-30)
Cruz, Ana Larissa Soares
;
Gargarella, Piter
;
https://lattes.cnpq.br/4641435644243916
;
https://orcid.org/0000-0003-4445-5819
;
Koga, Guilherme Yuuki
Austenitic stainless steels (ASS), notably AISI 316L, are recognized for their combination of high mechanical strength, toughness, and corrosion resistance in various applications. However, the presence of manganese sulfide (MnS) in AISI 316L stands out as the main cause of pitting corrosion susceptibility. Since electrochemical corrosion is a surface-initiated process, LASER surface remelting (LSR) can be a quick and effective method for eliminating these inclusions, given the process characteristics: high energy density and high heating and cooling rates. This study aims to recover AISI 316L steel compromised by MnS using LSR. The conditions as received and after laser remelting with different energy densities were microstructurally characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. Additionally, the degree of sensitization (ISO 12732) and chloride-induced corrosion resistance were evaluated, the latter investigated by cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, and inductively coupled plasma mass spectrometry in 0.6 M NaCl solution. XPS analyses were conducted for further characterization of the generated films. Power levels of 150 W and 300 W at an energy density of 2000 J/cm² were found to effectively modify and solubilize coarse and acicular MnS inclusions, resulting in a refined and homogeneous microstructure. The remelted samples exhibit a thick and uniform passive layer rich in Cr₂O₃, with high resistivity values (ρδ), indicating superior electrochemical performance. The results highlight the synergistic effects of higher energy densities and power levels in restoring surface corrosion resistance, enabling the formation of more protective and uniform passive films.
Pensamento computacional, pensamento teórico e currículo escolar à luz da teoria histórico-cultural
(Universidade Federal de São Carlos, 2024-07-30)
Mattos, Francielle de
;
Mello, Maria Aparecida
;
https://lattes.cnpq.br/8338726751746542
;
https://orcid.org/0000-0003-2404-7957
;
https://lattes.cnpq.br/2292116311910266
Computational Thinking, as one of the themes of the document Computing Complement to the BNCC, aims to develop cognitive skills related to problem-solving in a structured and systematic way and to develop thinking through computation. Throughout this text, the research, of a theoretical and bibliographical nature, based on the studies of Vigotsky, Davidov, Leontiev, Tikhomirov, the study explored several perspectives on the concept of Computational Thinking (CT). This term has undergone several reformulations with the aim of contributing to the updating of the curricula of courses in the area of Computing in higher education and to the organization of the teaching of these contents in Basic Education. From this, emphasis was placed on its teaching in Early Childhood Education, especially in Preschool, and in the first two years of Elementary School. Thus, it sought to answer the following question: Is computational thinking, as proposed in the BNCC and in its complement in the Preschool phase and in the first two years of Elementary School, towards the development of students' theoretical thinking as proposed by the Historical-Cultural Theory? Thus, the main objective was to characterize and analyze the understanding of computational thinking from the perspective of the Historical-Cultural Theory, as presented in the document Computing: Complement to the BNCC, in the stages of early childhood education (preschool phase) and in the first two years of Elementary School. Having pointed this out, the thesis presents that computational thinking as mentioned in the official documents analyzed is not characterized as theoretical thinking, according to the Historical-Cultural Theory. To this end, the logical-historical movement of the concept “computational thinking” was discussed and subsequently in-depth studies on the need for its formalization and conceptualization were carried out. The analyses led to the elaboration of an integrative synthesis, which guides the formation of theoretical thinking in an articulated manner and resignifies the concepts of Computational Thinking in light of the Theory of Reorganization through Human-Computer Interaction. The results of the research indicated that the term “Computational Thinking”, as presented in the official documents BNCC and Computing: Complement to the BNCC, is not characterized as theoretical thinking according to the Historical-Cultural Theory. In conclusion, it was understood that these documents do not promote the principles of dialectical logic but emphasize "know-how" — skills and competencies — to the detriment of the development of concepts and the formation of theoretical thought.
Desenvolvimento de processos cromatográficos empregando ensaios de triagem e modelagem fenomenológica
(Universidade Federal de São Carlos, 2024-07-30)
Vieira, Felipe
;
Pádua, Thiago de
;
https://lattes.cnpq.br/8909812973749651
;
https://orcid.org/0000-0003-0694-6991
;
Ribeiro, Marcelo
Phenomenological models are valuable tools for developing chromatography methods. However, its applicability is impaired by the theorical complexity and accessibility to model parameters. Despite materials are usually select by screening protocols, data obtained during this phase are not used further in the development of the purification process. Here, a joint estimation procedure that integrates data from microplate screening with a single column experiment was proposed to estimate equilibrium and dispersion parameters for modeling gradient elution. Initial estimates of equilibrium isotherm parameters were derived from the screening data, which were then refined by incorporating column chromatogram data to estimate mass transport parameters and enhance isotherm predictions. The proposed method was validated with a reverse phase chromatography using a non-ionic surfactant and functionalized silica. The equilibrium parameters estimated with microplate data predicted a retention volume 8.9% far from experimental results, while the joint estimation prediction was 0.8% in the best-case scenario. In this case, results show that the use of screening data combined with an L-curve method effectively mitigated model overfitting, even when relying on a single gradient elution column assay. The presented protocol should speed up the process development and reduce the consumption of inputs with column experiments.
Contribuições do ensino bilíngue Libras/Português para a aquisição da linguagem
(Universidade Federal de São Carlos, 2024-07-30)
Isidoro, Jayni Roberta Ramos
;
Rubio, Cássio Florêncio
;
https://lattes.cnpq.br/8357993415342241
;
https://orcid.org/0000-0002-6986-1381
;
https://lattes.cnpq.br/7109381002780237
In this research, we will address the impacts of bilingual education with the inclusion of Libras alongside Portuguese, both for deaf and hearing individuals, and we will examine the influence of this type of education on linguistic acquisition and development. Based on theoretical references, such as Martins (2007) and Gouveia (2019), among others, we carried out a bibliographic analysis of authors who have already experienced bilingual education between sign language and oral language. The results point out, among other issues, a broader lexicon among hearing individuals who went through bilingual education compared to those who experienced monolingual education. Based on this finding, it is concluded that the bilingual oral language/sign language proposal is not only beneficial to deaf children, but also to hearing children.
Novos desenvolvimentos para dados de contagem
(Universidade Federal de São Carlos, 2024-07-30)
Santos, Naiara Caroline Aparecido dos
;
Lemonte, Artur José
;
https://lattes.cnpq.br/4283549028869521
;
https://orcid.org/0000-0002-0249-7474
;
Bazán Guzmán, Jorge Luis
This work investigates new developments in count data analysis, focusing on two methodologies: Item Response Theory (IRT) models and Generalized Linear Mixed Models (GLMM). The research focuses on the development and application of classical and Bayesian methods to improve the analysis of existing count models and to propose new models. The chapters of this thesis comprise manuscripts developed throughout the doctoral program. First, a study is presented with the Rasch Poisson count model, already existing in the literature, aiming at a better understanding and introducing a new approach through the method of nested and integrated Laplace approximations. Techniques for residual analysis are shown through graphical visualization, using randomized quantile residuals, and the methodology is applied in the field of Psychology. We explore alternative models for count responses, which overcome some of the limitations of the Rasch-Poisson model. We detail its formulation and estimation methods, under both Classical and Bayesian approaches. Additionally, we demonstrate the potential of residual analysis using graphs applied to data from an attention test. Next, when considering mixed models, we introduce a new proposal for count responses, based on the one-parameter Bell distribution, explicitly detailing its formulation and estimation under Classical and Bayesian approaches. We evaluate the parameter recovery of the proposed estimation methodology through a simulation study and also show the potential of its use in an application to epileptic seizure data. Finally, we propose a new mixed regression model based on the Bell-Touchard distribution parameterized by the mean. Simulation studies are presented, and the methodology is applied in a neurophysiological experiment. The various studies and applications throughout the text show that the proposals yield good results and have potential use by researchers in various fields, with the codes used for parameter estimation made available.
Qualidade do leite e efeito do processamento sobre a segurança microbiológica do Queijo Porungo
(Universidade Federal de São Carlos, 2024-07-30)
Cardoso, Maria Luiza
;
Pimentel Filho, Natan de Jesus
;
https://lattes.cnpq.br/9157232954010211
;
https://lattes.cnpq.br/5730405531015391
Porungo is a traditional artisanal cheese produced in the southwestern region of São Paulo state. Although the milk used in its production is not thermally treated, which could pose a risk of pathogen contamination, the curd undergoes a hot water stretching process. This study aimed to evaluate the quality of the raw milk used in the production of Porungo cheese, as well as the impact of processing on the contaminating microbiota. Milk samples were collected from seven cows at a Porungo cheese production unit and analyzed for somatic cell count (SCC), standard plate count (SPC), total coliforms, Escherichia coli, enterobacteria, molds and yeasts, Staphylococcus aureus, and Streptococcus spp., as well as chemical composition. Over the course of a year, samples of milk, fermented-whey, curd, cheese post-stretching, and cheese post-salting were collected and evaluated for aerobic mesophilic bacteria, total and thermotolerant coliforms, and S. aureus counts. Additionally, the effect of stretching in hot water at temperatures between 65 and 72 °C on the viability of Listeria innocua inoculated into the Porungo cheese curd was evaluated. Three of the seven cows evaluated had SCC levels above 400,000 SC/mL, with S. aureus detected at levels exceeding 3 log CFU/mL in all milk samples, indicating the presence of subclinical mastitis in some animals. All raw milk samples freshly collected had SPC levels below 4.5 log CFU/mL, while fat and total solids content were extremely low. Aerobic mesophilic bacteria and S. aureus counts were not influenced by the season but showed significant differences among the cheese processing stages. Although the stretching stage did not significantly reduce the microbial population in both groups evaluated, a significant reduction was observed in the cheese after salting. The total coliform population varied throughout the evaluation period and among the stages analyzed, with no samples showing contamination by thermotolerant coliforms. The stretching process reduced L. innocua contamination by more than 1 log CFU/g in the cheese curd. Therefore, it can be concluded that, in general, the microbial population is not significantly affected by the time-temperature combination used in the cheese stretching process (65 °C for 2 min). On the other hand, L. innocua showed sensitivity to the stretching process. Thus, low contamination levels in the cheese must be ensured by good milking practices combined with good manufacturing practices.
Análise do ensino-aprendizagem de alunos do ensino médio usando a sequência didática “Os passeios aleatórios do Homem de Ferro”
(Universidade Federal de São Carlos, 2024-07-30)
Campos, Guilherme Augusto Silvestre de
;
Venezuela, Antonio Luis
;
https://lattes.cnpq.br/8722224671269332
;
https://lattes.cnpq.br/1926207057247440
In this work, through the McNemar Test and the proficiency test, we show the student's level of learning through a didactic sequence based on “Mônica's Random Walks” which for us was adapted to “Iron Man's Random Walks” with students from high school at a public school in the city of Sorocaba. The proposal for the didactic sequence was developed based on the theoretical foundation of didactic engineering, in which the working steps during the process were divided into theoretical and practical experiments, where students had to answer two nine-question questionnaires before and after the didactic sequence, which were tabulated and analyzed using the McNemar test. The test brought us a measurement of the student's learning, which could be, does not apply or applies, but it leaves a certain doubt, as it did not consider low variations, for this reason we created a percentage proficiency test so that it was possible a visualization by segments and thus have more data and information to carry out the necessary comparisons. Therefore, we would be able to measure through the comparisons proposed by both the McNemar test and the proficiency test how much the student was or was not able to learn the pre-established concepts in this proposal.
Estudo da viabilidade da determinação da dissolução em meio aquoso de compostos óxidos utilizando a ferramenta open source orange data mining
(Universidade Federal de São Carlos, 2024-07-30)
Santos, Armando José de Sá
;
Andreeta, Marcello Rubens Barsi
;
https://lattes.cnpq.br/7904227795652627
;
https://lattes.cnpq.br/6286321140581380
;
https://orcid.org/0000-0001-8242-6571
Solubility, or the ability of a material to dissolve in a solvent, is a fundamental property of materials, especially for ceramics and glass. The complexity of solute-solvent interactions makes it difficult to accurately calculate solubility, and the lack of precise measurement methods can affect the reliability of the data. The dissolution rate, which is the speed at which a solute dissolve, is crucial in areas such as chemistry and pharmacology. The Noyes-Whitney equation, developed in 1897, describes how the dissolution rate is influenced by various factors. The chemical composition of a glass can significantly influences its properties, including solubility and dissolution rate. Data mining and machine learning can be used to predict these properties, assisting in the discovery and design of new materials. Neural Networks are particularly useful for predicting solubility and dissolution rate due to their ability to model complex relationships. Orange Data Mining is a data mining and machine learning tool that can be used to predict the solubility and dissolution rate of glasses based on their composition. The tool is intuitive and easy to use, allowing researchers to build models without the need for extensive coding. It is also capable of handling large data sets, essential for data mining, proposing a unified approach to predict both solubility and dissolution rate, using only the material composition as input. This simplifies the prediction process, making it more accessible and less dependent on complex data. In this work, through open-source software, a study of the feasibility of using this tool in predicting solubility and dissolution rate in aqueous medium applied to oxide compounds will be presented.
São Benedito e a Estação das Curas: saúde, devoção e constituições do território sul-mineiro
(Universidade Federal de São Carlos, 2024-07-31)
Pereira, Gabriela Acerbi
;
Dulley, Iracema Hilário
;
https://lattes.cnpq.br/3004789177515766
;
https://orcid.org/0000-0002-0791-5313
;
https://lattes.cnpq.br/4894088139327334
The thesis addresses family experiences of devotion in São Benedito and in the Pretos Velhos entities in the south of Minas Gerais, considering the connections between both sacred presences in the territory. Based on these experiences of devotion, we investigated how generational health maintenance practices not only affected the organization and maintenance of families from a spiritual point of view, the perpetuation of traditional festivities linked to saints or consultation with entities, but the historical constitution of the South of Minas Gerais itself, relating them to understandings about healing, care and faith. Considering spiritual actions in the context of family trajectories, perceptions and ways of doing things inherited from ancestors were articulated and recorded, and to what extent these ways can narrate the historical transformations of the city of Poços de Caldas and its surrounding areas where it was dismembered between the 18th and 19th centuries, such as the municipality of Caldas. Based on 1) the lived narratives and memories shared by devout families, 2) together with the photographic collections of each family nucleus, 3) the consultation of archival documentation associated with the Festivals for São Benedito and Nossa Senhora do Rosário in the 19th century and the enslaved population in the territory, 4) as well as a bibliographic review about the slavery structure and the post-abolition context in the southern region of Minas Gerais, previous and current devotional experiences are described and analyzed. In this direction, the fieldwork develops from the cures experienced connected to ancestors (family members and Pretos Velhos entities) and which also situate São Benedito as a doctor for the population. All these processes were also considered to be situated in a region that was named Healing Station at the turn of the 19th century to the 20th century due to the presence of thermal waters and which, due to this factor, experienced high institutional investments from the empire, erasure policies aimed at the black population and indigenous people of the territory and a modernization project based on the logic of whitening and urban development associated with scientific thermalism and tourist exploitation of the region in such periods.
Comportamento de oxidação em temperatura elevada do aço inoxidável austenítico AISI 201LN
(Universidade Federal de São Carlos, 2024-07-31)
Spósito, Eric Valmir
;
Silva, Rodrigo da
;
http://lattes.cnpq.br/3763016865133213
;
https://orcid.org/0000-0002-1381-1334
;
Rovere, Carlos Alberto Della
With a proposal to be more economical alloys, the 200 series austenitic stainless steels have shown increasing market shares, often replacing 304 stainless steel in domestic applications. Despite their usage also in high-temperature environments, the oxidation behavior in these situations is not yet widely understood, for there is a lack of investigations specifically aimed at those alloys. This project investigated the high-temperature oxidation behavior of AISI 201LN austenitic stainless steel. Samples were oxidized in air and characterizations via optical microscopy, scanning electron microscopy with energy-dispersive X-ray spectroscopy and X-ray diffraction were carried out. At 700 ºC little oxidation took place and the material presented a thinner and more compact oxide layer, with some defects like nodes and spallation; on the other hand, at 750 and 800 ºC the mass gain due to oxidation was approximately ten times more intense, and the material exhibited an oxide layer with a very irregular, porous morphology, with many cracks and severe spallation. Such differences were related to the different oxides formed at each combination of time and temperature, with the formation mainly of simple and complex Cr and Mn-rich oxides at the lowest temperature, while at the highest temperatures the formation of an external Fe-rich oxide took place. Ultimately it could be concluded that the oxidation resistance of the material is mainly driven by Mn, which induces the formation of non-protective oxides, detrimental to the oxidation resistance of the alloy.
Caminhos para o sucesso: a coalizão e as medidas provisórias no governo Bolsonaro
(Universidade Federal de São Carlos, 2024-07-31)
Bertolazzi, Marina Zen
;
Casalecchi, Gabriel Avila
;
https://lattes.cnpq.br/9759794253878555
;
https://lattes.cnpq.br/1033582855595085
Amid debates about the importance of institutional political arrangements for the maintenance and stability of the democratic regime, as well as a perception of the changing views on coalition presidentialism, the challenge faced by presidents in forming and maintaining necessary alliances in Congress stands out. The negotiation power concentrated in the hands of the Executive, a source for obtaining a coalition by using control over the ministerial organization of the government, the power of the agenda, and the decree power as tools for exchanging support, becomes essential for understanding a president's way of governing. The current situation in Brazil, here focused on the government of Jair Bolsonaro, presents challenges to the literature on coalition formation by witnessing a presidential candidate's choice not to officially engage with other parties, and raises questions about the efficacy of coalitions in governance and the way it is conducted. Throughout his government, however, the approach with the suprapartisan group Centrão has attracted attention. Considering his four-year term, this thesis aims to comparatively analyze governance in an isolated government and in a coalition government. The study focuses on the Provisional Presidential Decree presented by the sitting president, observing the impact on legislative success of the conversion of these decrees after obtaining support from 2021 onwards. The results indicate that the approach to parties, especially with the president of the Chamber of Deputies, provided significant support for the deliberation and approval of his decrees, but with an added caveat: the increased prominence of the Legislature and its growing interference in government projects.