Principais Coleções do Repositório
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Assistente inteligente para gestão agrícola por meio de chatbot integrado ao whatsapp com inteligência artificial no monitoramento de lavouras de café
(Universidade Federal de Lavras, 2025-12-02) Andrade, Vinicius Habib; Correia, Luiz Henrique Andrade; Salgado, André de Lima; Reis, Renata Andrade; Estrella, Júlio Cezar
Contemporary agriculture faces the challenge of producing more food with fewer resources, balancing productive efficiency, environmental sustainability, and economic competitiveness. In this context, data-driven management becomes essential to support strategic and operational decision-making in the field. This study proposes and evaluates the use of an artificial intelligence–based conversational agent, integrated with WhatsApp, as a solution to centralize and interpret agricultural information. The developed system organizes climatic, financial, strategic, and operational data, providing accessible and personalized recommendations for farmers, with emphasis on coffee cultivation. The research is situated within the context of smart agriculture, aligned with the principles of Agriculture 5.0, exploring the potential of the Internet of Things (IoT) and artificial intelligence to promote more efficient, sustainable, and data-driven agricultural practices. The results obtained indicate strengthened autonomy of small and medium-sized producers, reduced waste, more rational use of inputs, and improved agricultural productivity.
A produção de significações sobre o Sistema Monetário Brasileiro nas aulas de matemática de uma turma do 4o ano do ensino fundamental
(Universidade Federal de Lavras, 2025-08-29) Silva, Ana Flávia; Caporale, Silvia Maria Medeiros; Gomes, Adriana Aparecida Molina; Ferrari, Fernanda Barbosa
This is a qualitative master's research project that aimed to investigate the production of meanings about the Brazilian Monetary System by a class of 20 fourth-grade elementary school students when they were involved in problem-solving practices and contexts. The researcher (a licensed Pedagogy professional) partnered with a fourth-grade classroom teacher, as the researcher was not yet working in a classroom. Data was collected from October 2 to October 6, 2023, during which 10 classes, each lasting 50 minutes, were conducted (two classes per day). Data was collected through audio and video recordings, students' written work, and the researcher's field diary. Based on this, the intention was to answer the following research question: What meanings about the Brazilian Monetary System are produced by fourth-grade elementary school students when they are involved in a practice mediated by problematizations? And to achieve the following general objective: to investigate evidence of students' production of meanings about the Brazilian monetary system when engaged in a problematizing practice. To achieve this general objective, the following specific objectives were proposed: to understand the movement and processes of producing meanings about the Brazilian Monetary System; to identify the arguments and strategies used by students in Problem Solving; to reflect on the process of becoming a teacher-researcher; and to propose an educational product about the Brazilian Monetary System through the methodological approach of Problem Solving. For data analysis, microgenetic analysis and the historical-cultural perspective were used, drawing on the works of Lev S. Vygotsky and other researchers who follow his line of thought. Two units of analysis were defined: the production of meanings about the Brazilian Monetary System, and the processes of becoming a teacher and becoming a researcher. Through the analysis, it was possible to perceive evidence of the students' meaning-making when they were involved in a problematized practice about the Brazilian Monetary System, based on the strategies and arguments produced during moments of interaction and the students' written work, as well as the production of meanings about teaching by the teacher-researcher.
Descrição Morfológica robusta e primeiros traços ecológicos para a população de Hyalella Smith, 1874 (Amphipoda: Hyalellidae) do Guareí
(Universidade Federal de Lavras, 2025-08-29) Nascimento, Amanda de Serpa; Bueno, Alessandra Angélica de Pádua; Silva, Marconi Souza; Silva, Carolina Vieira da
The present dissertation describes a new species of the genus Hyalella Smith, 1874, and investigates its ecological traits related to population structure and reproductive parameters in a freshwater ecosystem in southeastern Brazil. Variables such as sex ratio, body size, fecundity, and egg volume of females were analyzed. Significant results were observed for the analyzed variables, indicating that environmental factors directly influence life-history strategies. The morphological data collected supported the preparation of a taxonomic article, which resulted in the formal description of the new species. Distinguishing traits from the other 22 species reported for southeastern Brazil include: absence of a curved seta on the inner ramus of uropod 1 in males; sternal gills present on segments 3–7; presence of comb-scales on both gnathopods; gnathopod 2 with two distal plumose setae on the dactylus; uropod 3 with peduncle bearing three cuspidate setae with an accessory seta, and ramus with eight setae; maxilla 1 with seven serrate setae on the outer plate; and telson with four distal cuspidate setae and four lateral plumose setae on each side. Therefore, the results obtained reinforce the importance of environmental conditions in determining population and reproductive characteristics, contributing to the ecological understanding of the genus Hyalella and providing a basis for future conservation efforts.
Projeto institucional de leitura na educação infantil : da idealização à efetivação das práticas literárias
(Universidade Federal de Lavras, 2026-12-19) Karpinski, Nathália Andrade; Goulart, Ilsa do Carmo Vieira; Cabral, Giovanna Rodrigues; Marques, Fernanda Pedrosa Coutinh
The abstract should contain representative words of the work content, located below the abstract, separated by two spaces, preceded by the keyword expression. These representative words are spelled with the first letter lowercase, separated by semicolon. Early Childhood Education, particularly within the stage of Basic Education, is centered on providing children with diverse and meaningful experiences. In this sense, pedagogical work is required that stimulates the different fields of experience proposed by the National Common Curricular Base (BNCC), including language, in order to foster children’s ability to express themselves, interact with written materials, and engage in literary practices. Thus, written culture becomes part of the educational process, which calls for didactic-pedagogical actions that are more closely integrated with children’s social contexts. Therefore, understanding how teachers have been providing reading experiences for children can contribute to formative actions related to literary education. Based on these assumptions, this study aimed to investigate the institutional project of literary practices developed in Early Childhood Education within a municipal school system, from the perspective of the teachers who designed the project and those who implemented reading activities with children. To this end, a qualitative field research approach was adopted, using two data production instruments: semi-structured interviews with coordinators who designed the reading projects and the application of a questionnaire via Google Forms to teachers from the municipal school system of a city in the southern region of Minas Gerais, who work in preschool. The aim was to identify their perceptions and understandings regarding their knowledge of the reading proposals and the forms of knowledge that support teacher training in literary education. The research is grounded in the studies of Rildo Cosson (2014) on literary reading; Cecília Bajour (2012) on the development of reading comprehension; and Mônica Baptista (2022) on reading in Early Childhood Education. The analysis indicates that the reading practices developed contribute to children’s literary development and reveal both strengths and challenges. The results give visibility to the actions carried out in schools and highlight the need to strengthen teacher education and the conditions for implementing reading projects. As an Educational Product, a workshop on the theme of literary reading in Early Childhood Education was conducted, based on the studies carried out and aimed at students of the Pedagogy course, with the objective of enhancing teachers’ literary education.
Fungo micorrízico arbuscular no crescimento e na produção de cumarina em Mikania laevigata Shultz Bip. ex Baker
(Universidade Federal de Lavras, 2025-10-30) Rodrigues, Letícia da Silva; Carneiro, Marco Aurélio Carbone; Bertolucci, Suzan Kelly Vilela; Cardoso, Arnon Afonso de Souza; Resende, Luciane Vilela; Saggin Junior, Orivaldo José
Guaco (Mikania laevigata Shultz Bip. ex Baker) is a medicinal plant traditionally used to treat respiratory diseases such as cough and bronchitis. Its main bioactive compounds include coumarin, chlorogenic and dicaffeoylquinic acids, as well as essential oils containing germacrene D, caryophyllene oxide, and spathulenol. One strategy to enhance the production of these compounds is through soil microbiota management, with arbuscular mycorrhizal fungi (AMF) inoculation being a promising approach to stimulate plant growth and secondary metabolite synthesis in medicinal species. This study evaluated the effects of Rhizophagus clarus inoculation on the growth, coumarin production, and mycorrhizal symbiosis of M. laevigata cultivated under different soil conditions (autoclaved or non-autoclaved). The experiment was conducted in a completely randomized design, in a 2 x 2 factorial scheme, with 10 replicates. The factors evaluated were AMF inoculation (presence of inoculum – CF and absence of inoculum – SF) and soil condition (autoclaved – SA and non-autoclaved – SNA). Morphological variables (height, number of leaves, and shoot, root, and total biomass), coumarin content, mycorrhizal colonization, and spore density were analyzed. The treatment with non-autoclaved and inoculated soil (CFSNA) showed the best results, with a total biomass of 12.95 g, height of 216.2 cm, 71.4 leaves, coumarin content of 0.83 mg, 91.4% mycorrhizal colonization, and 212.5 spores/50 g of soil. In contrast, the treatment with autoclaved soil and no inoculation (SFSA) presented the lowest values for all variables. The coumarin content observed in CFSNA represented a 20.59% increase compared to SFSA, exceeding the minimum value established by the Brazilian Pharmacopoeia (6th edition), which requires at least 0.15% coumarin in dried M. laevigata leaves. The results demonstrate that the simultaneous presence of R. clarus and native soil microbiota enhances mycorrhizal symbiosis, promoting plant growth and intensifying the biosynthesis of coumarin, the main bioactive compound of M. laevigata. The significant increase in coumarin content reinforces the role of AMF in optimizing the plant’s secondary metabolism. Thus, the use of R. clarus represents an effective strategy for cultivating M. laevigata with greater productivity, higher coumarin levels, and improved pharmacological quality.