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Esgoto doméstico tratado como aporte hídrico e nutricional no cultivo de antúrio de corte
(Universidade Federal de São Carlos, 2024-07-26)
Gasparini, Amanda Ramos
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Rodrigues, Josiane
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Souza, Claudinei Fonseca
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https://lattes.cnpq.br/4858219292242433
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https://lattes.cnpq.br/3314307065207131
In recent years, the agricultural sector has faced an increase in the demand for water resources and nutrients. However, human activities have impaired natural nutrient cycles, worsening the already uneven natural distribution of water. A sustainable option to mitigate water and fertilizer shortages is the use of treated domestic sewage, which, in addition to meeting the water demand of plants, provides nutrients and organic matter. This study evaluated the effects of the application of treated domestic sewage on the protected cultivation of anthurium. The experiment was conducted on suspended benches, where the plants were grown on coconut fiber substrate in Styrofoam gutters, within a protected environment. The treatments were: (TRA) treated domestic sewage supplemented with mineral fertilizers, (TA) drinking water supplemented with mineral fertilizers and (TR) exclusively treated domestic sewage. The experimental design was randomized blocks, with the data submitted to the Tukey test. The exclusive application of treated domestic sewage in the TR resulted in nutritional deficiency and below-average productivity for anthurium. The biometric parameters (length of stem, spadix, spathe, largest leaf, number of leaves, flowers and plant height) and productivity in TRA did not differ statistically from TA, indicating that the use of treated domestic sewage supplemented with nutrients showed high productivity compared to TR. Despite the presence of Escherichia coli in the treated sewage, the cultivation was safe, with no contamination in the plants. The TRA and TA treatments showed similar efficiency in water consumption, with averages of 1.9 and 1.8 mm per day, respectively, and higher water use efficiency (WUE) of 403 and 396 flowers m-3, due to fertilizer supplementation. The TR treatment had lower water consumption (1.5 mm per day) and lower efficiency (WUE of 343 flowers m-3), resulting in plants with inferior development and lower flower quality due to nutritional deficiency. Over two years, the TRA treatment had a productivity of 372,678 flowers per hectare, with no significant difference in relation to the TA treatment, which had 362,946 flowers per hectare. The TR treatment had a lower productivity of 257,767 flowers per hectare. It is concluded that the application of treated domestic sewage as an alternative and sustainable source of water and nutrients in coconut fiber substrate in a protected environment is viable for the cultivation of anthurium, without compromising the health safety of professionals and consumers.
Modelagem e análise de frequências de manipuladores paralelos acionados por cabos
(Universidade Federal de São Carlos, 2024-07-26)
Ribeiro Filho, Marcelo Cerchi Ribeiro
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Fontes, João Vitor de Carvalho
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https://lattes.cnpq.br/9473668144091435
Cable-Driven Parallel Manipulators (CDPRs) are an innovative class of robots that use cables instead of rigid links, offering high dynamics, load capacity, and flexibility. This work addresses the modeling and analysis of the natural frequencies of CDPRs, aiming to prevent resonance issues that can compromise the precision and operational efficiency of these systems. The developed methodology includes the mathematical modeling of CDPRs and the analysis of natural frequencies with variations in cable tension and end- effector position. The results indicate that system rigidity, and consequently the natural frequencies, are highly influenced by cable tension, especially in higher vibration modes, which showed greater sensitivity to positional changes compared to lower modes. The research demonstrated that increasing the minimum tension in the cables can reduce the risk of resonance, providing greater stability to the system. This study contributes to a better understanding of the dynamics of CDPRs and suggests control strategies for safe and efficient applications in fields such as astronomy, logistics, and medical rehabilitation.
Transferência de elétrons em complexos de Rutênio (II) Perileno Diimida
(Universidade Federal de São Carlos, 2024-07-26)
Tiyoda, Anderson Jun
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Carlos, Rose Maria
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https://lattes.cnpq.br/1589143355309943
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https://lattes.cnpq.br/0641091681781723
Ruthenium(II) polypyridyl complexes are among the most studied metal complexes, with numerous articles and book chapters dedicated to them due to their properties being used in technological and medical fields, such as applications in photocatalysis and dynamic phototherapy, among others. Photochemistry is one of the most important processes for living beings due to photosynthesis, which starts from simple molecules and sunlight to efficiently produce a complex carbohydrate and oxygen gas, the last being essential for aerobic living beings. Ru(II) complexes with perylene diimide (PDI) ligands exhibit interesting characteristics for studies of electron and charge transfer, such as long triplet state lifetimes in the nanosecond range. Due to this long lifetime, the complexes can be applied in the production of singlet oxygen and for photodynamic therapy.
Vesículas extracelulares: ações no microambiente tumoral e possíveis aplicações terapêuticas
(Universidade Federal de São Carlos, 2024-07-26)
Pachane, Bianca Cruz
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Altei, Wanessa Fernanda
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https://lattes.cnpq.br/3727790337302830
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https://orcid.org/0000-0002-6636-7951
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Araújo, Heloísa Sobreiro Selistre de
Extracellular vesicles (EVs) are particles delimited by a bilipid layer, secreted by cells for intercellular communication. EV release is favored under certain conditions, such as in cancer, where it interferes in multiple processes including the metastatic cascade and the tumor microenvironment. Studying the basic and applied biology of EVs enables the elucidation of new mechanisms of interest to human health, suggesting new therapeutic potentials. In this work, we explored the adhesive characteristic of EVs for in vitro applications, investigating their adsorption on glass surfaces using super-resolution microscopy and proposing a novel method for utilizing common laboratory materials for advanced applications. We investigated the detailed characteristics of EVs from breast cancer cells through proteomics, observing a clear difference in protein composition between hypoxic and normoxic vesicles. In cellular studies, the self-signaling of hypoxic EVs favored cell invasion under optimal oxygen conditions. In co-culture models using cells from the tumor microenvironment, we verified that hypoxic EVs act to recapitulate the cellular phenotype, maintaining cell cohesion in tumor and promoting a pro-tumoral microenvironment. Scaling up the study for potential therapeutic applications, we investigated the internalization of model EVs by human B cells ex vivo, corroborating previous findings in primate models and enabling further advancements in pharmacokinetic and biodistribution studies.
Recursos digitais em aulas de espanhol: experiências de professores durante as aulas remotas e presenciais
(Universidade Federal de São Carlos, 2024-07-26)
Bueno, Melanie Zambon
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Gregolin, Isadora Valencise
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https://lattes.cnpq.br/1015869228676997
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https://orcid.org/0000-0002-9345-3126
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https://lattes.cnpq.br/0397450512944041
Con la pandemia Covid-19, la interacción en lengua española se trasladó de un ambiente físico, en el que el contacto entre los alumnos era mutuo, a un ambiente virtual, que depende de varios factores para que ocurra, desde los equipos utilizados, como las computadoras, hasta la velocidad del internet (Kenski, 2003). Con eso, muchos alumnos se quedaron sin acceso a las clases, lo que perjudicó la interacción con sus profesores y amigos. El cambio del aula presencial para el virtual trajo también muchas discusiones acerca de la ubicuidad del conocimiento (Santaella,2013), llevando a la necesidad del desarrollo de nuevas competencias digitales, para que los docentes hicieran de las herramientas digitales más que simplemente un auxilio en las clases, hacerlas recursos digitales, parte de la planificación y del enfoque(Mayrink y Albuquerque-Costa, 2017). En vista de este escenario, desarrollamos una investigación en la graduación (Bueno, 2021) objetivando identificar, junto a un grupo de profesores de español de las enseñanzas fundamental y media, las posibilidades y limitaciones de tecnologías digitales utilizadas antes y durante la pandemia para la interacción con los alumnos, ya que interactuar en la clase de lengua española es muy importante para que el alumno pueda construir su conocimiento, según Amendolara (2008). Los resultados alcanzados en nuestra investigación anterior evidenciaron la importancia de profundizar más la recolección de datos y los análisis y, entonces, propusimos la continuidad de esta investigación en nivel de maestría. Son objetivos de esta disertación, por lo tanto, profundizar discusiones con respecto a la forma como son utilizadas las tecnologías digitales en la enseñanza y aprendizaje de lengua española, identificar cuáles recursos digitales fueron utilizados para promover la interacción por este mismo grupo de profesores de español con el regreso a las clases presenciales y discutir las dificultades de su inserción en clases, bien como sus potencialidades interactivas; además de entender la visión del grupo sobre Competencia Digital, para hacer una reflexión. Metodológicamente, la investigación posee carácter cualitativo-exploratorio (Oliveira, 2008) y longitudinal (Goldstein, 1979) y se desarrolló en tres etapas. En la etapa inicial, se realizó una revisión bibliográfica en Google Scholar y en Portal de Periódicos CAPES de investigaciones y publicaciones anteriores en el área de Lingüística y Lingüística Aplicada sobre el uso de recursos digitales para la enseñanza de español como lengua extranjera en Brasil. En posesión de estos datos, elaboramos un cuestionario y una entrevista semi estructurados que fueron respondidos por el grupo de profesores. La segunda etapa consistió en la recolección de respuestas para profundización y la última etapa consistió en la sistematización y el análisis comparativo de los datos recopilados en 2020-2021 y 2022-2023. La investigación se basa en estudios teóricos sobre el uso de tecnologías digitales en el campo educacional general (Kenski, 2003) sobre la tecnopedagogía crítica (Román-Mendoza, 2018) y sobre el uso de tecnologías en la enseñanza de lenguas en el campo de la Lingüística Aplicada (Soto, Mayrink y Gregolin, 2009; Paiva, 2008; Tallei, 2011;2014; Fraga, 2013; Gregolin, 2017; y Abio, 2017). Por medio de estos datos, se hizo posible identificar nuevas maneras de integrar tecnologías a prácticas didácticas durante la pandemia, tendencia que no se observó en las prácticas presenciales previas y posteriores a ella.
Variáveis hematológicas, imunológicas e regulação iônica em Tilápia-do-Nilo, Oreochromis niloticus coletadas em lagoas da Grande Vitória -Espírito Santo- em áreas de influência de atividades metalúrgicas
(Universidade Federal de São Carlos, 2024-07-26)
Carvalho, Luana Beserra de
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Souza, Iara da Costa
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https://lattes.cnpq.br/5391583114634391
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Fernandes, Marisa Narciso
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https://lattes.cnpq.br/3021357484136942
Aquatic ecosystems, especially those located close to urban centers and metallurgical activities, are receptors of wastewater and deposition of particulate matter from surrounding activities. Brazil is one of the largest producers and exporters of iron ore, with emphasis on the state of Espírito Santo, where two of the largest metallurgical complexes in the country are located, the Tubarão and Ubu Complex. In this scenario, this study aimed to evaluate the blood, gills and kidneys of Nile tilapia, Oreochromis niloticus collected in coastal lagoons influenced by metallurgical activities (Maemba and Carapebus) and in an aquaculture facility (Alegre) located in Alegre, 140 km from metallurgical industries. Water and sediment, and blood, gills and kidneys of O. niloticus collected in these lagoons and in Alegre were analyzed for the presence and concentration of metals. In fish, the relative condition factor (Kn) and multibiomarkers (hematological, immunological, physiological, genotoxicity and mutagenicity) were analyzed in the blood (plasma and erythrocytes) to evaluate animal health, and multibiomarkers (biochemical, morphological and physiological) were analyzed in the gills and kidneys to verify the mechanisms of osmotic and ionic regulation. The physical and chemical parameters of the water influence the ecosystem of these lagoons, the bioavailability of metals and the osmoregulation. The analysis of the main components separated Alegre from the other lagoons that are influenced by waste from metallurgical industries. Although some metals in the water and sediment of Alegre were higher than in the lagoons, the concentrations of metals in the blood of fish from Alegre were lower compared to that of fish collected in Maemba and Carapebus, while in the gills and kidneys, some metals were higher. higher than in the lagoons. Fish from the Maemba M1 lagoon showed anemia and lower osmolality. Fish from the Carapebus lagoon had higher percentage of micronuclei suggesting the presence of genotoxic agents in the water or sediment, and had the highest Cl- concentration, which may be related to an adjustment to the brackish water in which they live. The activity of Na+/K+-ATPase, H+-ATPase and carbonic anhydrase enzymes, ionocyte fractional area in the gill surface and in renal tubular area varied in the fish of lagoons due to physicochemical characteristics and metal concentration of the lagoons. In conclusion, fish from Alegre have the best health conditions when compared to fish located in lagoons close to metallurgical activities confirming the hypothesis that fish collected in lagoons close to mining and steel activities have a more compromised health due to the human influences around them compared to fish from a region without these industries (Alegre).
Teorema de Pitágoras: proposta de sequência didática para o trabalho com demonstrações no 9° ano do ensino fundamental
(Universidade Federal de São Carlos, 2024-07-26)
Gomes, João Lorena de Jesus Gomes
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Massago, Sadao
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https://lattes.cnpq.br/1915704875970931
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https://lattes.cnpq.br/1915704875970931
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https://orcid.org/0000-0002-3486-3811
This work adresses the role and importance of demonstrations in Mathematics classes for the final Years of Elementary Education. To this end, it considers as a starting point the BNCC, which includes the performance of demonstrations among the skills that students should acquire throughou their schooling. It discusses the demonstration as intrinsic characteristic of Mathematics, as a means of validation and advancement in the most diverse fields of study of this Science. It also presents he suggestion of three demonstration of the Pythagorean theorem that can be carried out together with 9th-grade students of Elementary Education, in order to answer the guiding question “How is it possible to perform demonstrations of the Pythagorean theorem in Elementary Education?”.
Desenvolvimento de produto e Tecnologia Assistiva: uma revisão sistemática de modelos de auxílio à prática projetual de dispositivos assistivos
(Universidade Federal de São Carlos, 2024-07-26)
Barros, Fabio Lopes
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Borrás, Miguel Ángel Aires
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https://lattes.cnpq.br/0247842684077591
The purpose of this study is to identify common patterns in the development processes of assistive products by conducting a systematic literature review. The study focuses on articles from scientific databases that present studies on the design process in Assistive Technology (AT). The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodological tool was used to identify 116 relevant articles on AT development methodologies in the Scopus, SciELO, and Web of Science databases. Based on the criteria proposed by the PRISMA logic 15 articles were selected for analysis. Despite the diversity of methodological approaches found, the data and information were systematized to identify patterns that unified them. The findings of this study revealed a methodological approach that unifies the patterns, and it is presented as the main result.
(Nano)partículas metálicas para diferentes arquiteturas de dispositivos eletroquímicos
(Universidade Federal de São Carlos, 2024-07-26)
Orzari, Luiz Otávio
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https://orcid.org/0000-0001-9707-9795
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Janegitz, Bruno Campos
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https://lattes.cnpq.br/7746094938977989
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https://lattes.cnpq.br/3384547719546332
In this doctoral thesis, new architectures of electrochemical systems for fuel cells, sensors and biosensors were developed. To this end, various methodologies for adding metallic particles to the surface of the working electrode were explored, following characterizations and investigations into their behavior and subsequent applications in energy efficiency and/or determination of analytes. Firstly, a multifunctional device was developed, exploring the combination of fuel cells with electrochemical sensing, in a single system. To this end, compositions of carbon-supported electrocatalysts were investigated, involving the metals Pd, Ag and Bi. In the ethanol oxidation reaction, the Pd50Ag45Bi05/C catalyst demonstrated interesting behavior and cost-efficiency, being subsequently used for the determination of dopamine in synthetic urine samples. Two analytical curves were obtained for the sensor: one involving the direct oxidation of dopamine from 4.0 to 40 µmol L−1, with a detection limit (LOD) equal to 0.035 µmol L−1; and another, due to the complexation that occurs between catecholamines and metal surfaces, from 0.2 to 1.0 µmol L−1, with a LOD of 0.14 µmol L−1. The second device is an electrochemical sensor and immunosensor, in which Pd nanoparticles were electrodeposited on the surface of the working electrode. To this end, a new conductive carbon black and polyvinyl acetate ink was developed to manufacture the three-electrode system. With the aid of Design of Experiments, the parameters for metal deposition were investigated and the sensor was applied to determine epinephrine in synthetic cerebrospinal fluid samples. Afterwards, the sensor was modified with cysteamine and glutaraldehyde for proper immobilization of Anti--synuclein. The biosensor was then used to construct a calibration curve of -synuclein phosphate buffer, with a linear range between 1.5 and 15 g mL−1 (LOD = 0.13 g mL−1) and in samples of human blood serum, in a linear range of 6.0 and 100.5 g mL−1 (LOD = 1.31 g mL−1), by electrochemical impedance spectroscopy, demonstrating its efficiency in more complex environments. The third system involved the use of Au microflowers electrodeposited on the surface of the previously developed conductive ink, to increase the capacitance response of the material. Design of Experiments was used to optimize the conditions of the self-assembled layers for biosensor modification. Once the best working conditions were defined, non-faradaic electrochemical impedance spectroscopy was used to find a linear range between capacitance and PARK7/DJ-1 concentration, corresponding to the region of 20 to 120 ng mL−1. The LOD obtained for this system was 0.207 ng mL−1. The device was then applied to a fortified synthetic cerebrospinal fluid sample, where it showed attractive responses using the spike and recovery method. Finally, a last device was developedfor the oxidation of ethanol, seeking to combine the properties of Au and Bi to produce a more attractive device for catalytic processes. Full factorial and Doehlert matrix designs were used to find an optimal composition between the metals. An extensive morphological and electrochemical characterization was carried out, seeking to understand the behavior of the conductive ink modified with each of the metals separately, as well as with their mixture. Considered a less efficient catalyst due to its high chemical stability, Au becomes much more efficient in synergy with low concentrations of Bi, but the material does not have complete regeneration of its surface, being more suitable for processes in which current generation must be high in a short space of time.
Formação continuada de professores (as) na educação infantil: contribuições para uma educação antirracista a partir das tertúlias dialógicas pedagógicas
(Universidade Federal de São Carlos, 2024-07-26)
Guedes, Helenice Aparecida Magalhães De Sousa
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Braga, Fabiana Marini
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https://lattes.cnpq.br/1103496815216263
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https://lattes.cnpq.br/9140519094204978
The thesis discusses the Dialogic Pedagogical Training of Teachers and its contributions to Anti-Racist Education, with a focus on Early Childhood Education. This approach is recognized as a Successful Educational Action, identified by the Includ-Ed project (2011). Based on the Communicative Methodology (CM), the main objective of the research was to analyze, through transformative and/or exclusionary elements reported by the research participants, how the continued education of Early Childhood teachers can contribute to Anti-Racist Education, with dialogic pedagogical gatherings as the central axis. The study aims to identify its contributions to anti-racist education and compliance with related laws, 10.639/03 and 11.645/08. The central thesis argues that Dialogic Pedagogical Gatherings are a tool that provides effective knowledge and instruments for the continued education of teachers to promote Anti-Racist Education. To this end, Dialogic Pedagogical Gatherings on Anti-Racist Education were conducted with in-service teachers and school staff through a course offered and certified by institutional means, in partnership with the research center to which the researcher belongs. The guiding questions of this study are: What knowledge do teachers have about Anti-Racist Education? What transformative and exclusionary elements do Dialogic Pedagogical Gatherings (DPG) offer Early Childhood teachers for the development of Anti-Racist Education? Data collection and organization were carried out through three instruments: Questionnaires, Communicative Interviews, and Communicative Discussion Groups (Gómez, 2006). The research involved 18 participants, including in-service teachers and members of the management team from two public municipal schools. The results indicate that dialogic pedagogical training, through DPGs, can contribute to promoting Anti-Racist Education and strengthening the ethnic and racial identity of children. For this, it is necessary to expand the inclusion of the topic in continued training and carry it out base on scientific evidence.
Função endotelial como indicador prognóstico, influência nos níveis de atividade física em pessoas idosas e evidências científicas sobre a reabilitação pulmonar em pacientes com síndrome pós-COVID-19
(Universidade Federal de São Carlos, 2024-07-26)
Oliveira, Murilo Rezende
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Silva, Audrey Borghi
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https://lattes.cnpq.br/4855616925791895
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https://orcid.org/0000-0002-3891-6941
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https://lattes.cnpq.br/6238891126104160
The COVID-19 pandemic has brought significant challenges to public health, particularly for vulnerable populations such as older people, COVID-19 patients, and those with persistent symptoms post-infection (Post-COVID-19 Syndrome). Given the knowledge gap and lack of evidence on the topic during the development of this thesis (from 2020 to 2024), our research group conducted studies to elucidate the main issues at each stage following the onset of COVID-19. Below are three of these studies: Study I - Objective: To evaluate the relationship between flow-mediated dilation (FMD) of the brachial artery, a non-invasive measure of endothelial function, with hospitalization days and mortality in patients diagnosed with COVID-19, and to compare these measures and outcomes in patients with and without COVID-19. Methods: A prospective observational study was conducted with 180 participants, including both confirmed COVID-19 patients (COVID-19 group) and suspected COVID-19 patients (Non-COVID-19 group). Clinical assessment and FMD measurements were performed within the first 24-48 hours of hospitalization. Patients were followed until discharge or death. Results: We evaluated 98 patients in the COVID-19 group and 82 in the Non-COVID-19 group. The COVID-19 group had longer hospital stays and higher mortality rates compared to the Non-COVID-19 group (p=0.01 and p<0.01, respectively). The COVID-19 group also showed a significantly greater reduction in both absolute and relative FMD (p<0.01 for both). Absolute FMD≤0.26 mm and relative FMD≤3.43% were identified as optimal cut-off points for predicting mortality and longer hospital stays. Kaplan-Meier analysis indicated that COVID-19 patients had a high probability of death within 10 days of hospitalization. Conclusion: Hospitalized COVID-19 patients exhibit early endothelial dysfunction, longer hospital stays, and higher mortality compared to those hospitalized for other reasons. Study II - Objective: To evaluate the available evidence on the physical activity levels of older people during the COVID-19 pandemic. Methods: This systematic review, registered in PROSPERO (CRD42021241116), included cross-sectional and cohort studies. The New Castle-Ottawa Quality Assessment Scale was used to measure study quality. Results: A total of 25 studies were found, including 14 cross-sectional and 11 cohort studies. The studies indicated that the older population was highly affected regarding physical activity levels and lifestyle during the COVID-19-induced restrictions, quarantines, and lockdowns. There was a significant reduction in physical activity levels, leading to declines in physical fitness and an increase in sedentary behavior, factors directly related to increased frailty in this population. Conclusion: Physical activity levels in the older population decreased during the COVID-19 quarantine period worldwide. Strategies to maintain physical condition should be encouraged with exercises that meet the needs of the older people during the pandemic to maintain and improve their health. Study III - Objective: To establish the effects of pulmonary rehabilitation in patients with persistent symptoms post-COVID-19 infection. Additionally, to compare the modalities of pulmonary rehabilitation services (face-to-face and telerehabilitation) and the duration in weeks (4-8 weeks and >8 weeks). Methods: This systematic review, registered in PROSPERO (CRD42022310788), included randomized clinical trials. Data extraction and quality assessment were performed independently by two reviewers. Methodological quality was evaluated using the Cochrane Risk of Bias Tool (RoB-1). Results: The literature search retrieved 1,406 articles, of which 7 studies explored the effects of pulmonary rehabilitation in patients with post-COVID-19 syndrome. The meta-analysis showed an increase in exercise capacity with pulmonary rehabilitation compared to control (6-minute walk test: mean difference: 60.56 m, 95% confidence interval: 40.75−80.36), a reduction in fatigue (Fatigue Severity Scale: MD: -0.90, 95%CI: -1.49 to -0.31), but no change in dyspnea (MD: -0.57, 95%CI: -1.32 to 0.17) and muscle strength (MD: 3.03, 95%CI: -1.89 to 7.96). There were no differences between telerehabilitation and in-person pulmonary rehabilitation regarding effects on peripheral muscle strength (p=0.42), dyspnea (p=0.83), and fatigue (p=0.34). No differences were found between programs of 4-8 weeks and >8 weeks concerning exercise capacity (p=0.83), peripheral muscle strength (p=0.42), and dyspnea (p=0.76). Conclusions: Pulmonary rehabilitation improves exercise capacity and reduces fatigue in patients with post-COVID-19 syndrome. The duration of pulmonary rehabilitation (4-8 weeks vs. >8 weeks) or modality (telerehabilitation vs. face-to-face) did not affect the outcomes, but data were limited and based on subgroup analyses. More evidence is needed to determine the optimal delivery mode and duration of pulmonary rehabilitation for post-COVID-19 syndrome. Final Considerations and Future Directions: Based on the findings, we conclude that these results reinforce the importance of considering non-invasive endothelial function assessment using FMD early in hospitals for COVID-19 patients. Additionally, this study underscores the need to seek measures to improve and restore physical activity levels in the elderly in the post-pandemic period and highlights the essential role of pulmonary rehabilitation in patients who were infected with COVID-19. However, evidence on the best form of distribution and duration of rehabilitation remains insufficient, and high-quality clinical trials are needed.
Plantas de cobertura como facilitadoras do cultivo de milho em sistema de plantio direto orgânico
(Universidade Federal de São Carlos, 2024-07-26)
Silva, Maira Abigail dos Santos
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Silva, Laura Fernanda Simões da
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https://lattes.cnpq.br/2235270776321472
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Fontanetti, Anastácia
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https://lattes.cnpq.br/3598362104615834
Cover crops can act as facilitators for the production of maize (Zea mays L.) in an organic no-tillage system. The mixture of species and/or isolated cultivation, mainly of legumes, can increase the availability of nitrogen (N) and phosphorus (P) for maize in succession. The aim of this study was to evaluate the potential of cover crops, isolated and in a mixture (mix), on N and P dynamics in the soil, mineral nutrition, and maize production in an organic no-tillage system. The experimental design was a randomized block design with 5 replications and 4 treatments: (1) Mix - Crotalaria ochroleuca, dwarf pigeon pea (Cajanus cajan, L. Millsp.), pearl millet (Pennisetum glaucum, L. R. Brown), and buckwheat (Fagopyrum esculentum Moench), (2) pearl millet, (3) C. ochroleuca, and (4) fallow/spontaneous vegetation. The green and dry mass production, lignin content, and macronutrient accumulation were evaluated in the cover crops. In the soil, ammonium, nitrate, available phosphorus (P) levels, and the activity of acid and alkaline phosphatase enzymes were assessed. For maize, chlorophyll index, foliar macronutrient content, and grain yield were evaluated. C. ochroleuca contributed to the supply of N (ammonium and nitrate) in sync with maize demand, and despite not increasing foliar N levels, it provided the highest maize grain yield. The inclusion of cover crops recognized for their efficiency in P absorption from the soil, such as dwarf pigeon pea and buckwheat, increased P accumulation in the dry mass of the mix. However, it did not increase soil P levels during the maize cycle sown in succession.
On the thermomechanical behavior of model composites using digital image correlation
(Universidade Federal de São Carlos, 2024-07-28)
Zago, Igor Paganotto
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Angélico, Ricardo Afonso
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https://lattes.cnpq.br/4572583709143785
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https://orcid.org/0000-0002-1621-9221
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Canto, Rodrigo Bresciani
In composite systems with incompatibility between the coefficients of thermal expansion (CTE) of their phases, stresses can lead to cracking of the material during a temperature variation. Analytical, numerical and experimental studies on the subject have been carried out. Experimentally, this topic is difficult to approach, since observing and measuring the effects of temperature variation in composite systems is not a trivial task. With the development and improvement of field measurement techniques such as Digital Image Correlation (DIC), a new approach is proposed in combination with the use of model composites. In the present study, mechanical and thermal properties of model composites phases composed of alumina and colloidal silica matrices with cylindrical inclusions of brass or zirconia were evaluated, and temperature variation experiments aided by DIC were carried out to obtain experimental displacement and strain fields. The model composites temperature variations were conducted up to 300, 600 or 900 ○C depending on the systems’s response up to that temperature. Such experiments allow the visualization of the model composites cracking, which can be quantified in terms of crack initiation and evolution. The quantification of cracking was done from the calculation of an inelastic strain field. Obtaining this field of both opposite faces of the tested systems and quantifying its cracking provides data for comparison with analytical and numerical modeling of cracking phenomena due to CTE incompatibility of such systems, results that do not exist in the literature. Thus, the data produced allows the modeling of this phenomenon to be carried out for the proposed composite systems, using the evaluated properties and having field information and parameterized cracking parameters for comparison.
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
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Guerreiro, Thais de Cassia Martinelli
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https://lattes.cnpq.br/2650555786682535
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https://lattes.cnpq.br/3042103539298188
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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
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Rodrigues, Tatiane Cosentino
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https://lattes.cnpq.br/8361431964064731
;
https://orcid.org/0000-0002-4402-2805
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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
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Dal'Evedove, Paula Regina
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https://lattes.cnpq.br/1170937498266968
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https://orcid.org/0000-0003-1521-2201
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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
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Fontes, João Vitor de Carvalho
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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
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Assis, Karina Gomes de
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https://lattes.cnpq.br/4058077286734344
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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
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Amarante Júnior, Ozelito Possidônio de
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https://lattes.cnpq.br/7857430001310706
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https://orcid.org/0000-0001-9604-9463
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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
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Mascaro, Lucia Helena
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https://lattes.cnpq.br/9130022476352844
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https://orcid.org/0000-0001-6908-1097
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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.