FCT - Trabalho de Conclusão de Curso

URI Permanente para esta coleçãohttp://200.137.215.59//handle/ri/11337

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Análise da aplicação do método de custeio variável: um estudo de caso em uma pequena empresa de produtos e serviços para veículos
(Universidade Federal de Goiás, 2025-06-17) Silva, Willer Paulo Leite da; Ribeiro, Matheus Rissa Peroni; Ribeiro, Matheus Rissa Peroni; Tinoco, Cynara Mendonça Moreira; Yamanaka, Lie
Given the decline in passenger tire sales in 2024 and the growing competitiveness in the sector, this study aimed to analyze the application of the variable costing method in a small vehicle products and services company, under the Simples Nacional tax regime, located in Goiânia, Brazil. By organizing product groups and identifying variable and fixed costs, cost management tools were applied, such as contribution margin, accounting and economic break-even points, safety margin, and degree of operating leverage (DOL). The results revealed that although car tires generated the highest annual revenue (50.69%), inner tubes showed greater proportional profitability, with a contribution margin of 88.16%. The first quarter recorded the highest revenue; however, the third quarter was the most profitable (R$ 18,919.20) with the highest margin (82.73%). The company surpassed the accounting break-even point (R$ 99,620.96), but did not reach the economic break-even, falling R$ 1,672.85 short of the annual target profit of R$ 72,000. The analysis of DOL across quarters helped to understand the effects of different strategic choices under varying seasonal conditions. It highlighted efficient performance in periods of lower demand—through reduced stock acquisition and focus on high-margin products—and loss of proportional profitability in the fourth quarter, when the company prioritized sales volume over margin, leading to a sharp rise in variable costs. It was concluded that the variable costing method was effective in providing insight into the company’s financial dynamics and in supporting strategic decision-making. Its continued use is recommended, combined with tighter inventory control, purchase planning based on sales forecasts, and more accurate assessment of individual product margins. This approach enables the company to better align its pricing and purchasing strategies with seasonality and its overall profitability goals.
Estudo aplicado sobre a eficiência produtiva e a qualidade final das lentes oftálmicas fabricadas com o uso de ferramentas diamantadas
(Universidade Federal de Goiás, 2025-06-17) Sá, Brena Carvalho de; Martins, Matheus Carrara; Troysi, Fernanda Christina Teotonio Dias; Troysi, Fernanda Christina Teotonio Dias; Martins, Matheus Carrara; Francisco, Roberto da Piedade; Garkauskas Neto, Bruno
The manufacture of ophthalmic lenses requires high accuracy and state -of -the -art technologies such as digital surface to ensure quality and performance. This quantitative study addressed how the wear and tear and reafiation of diamond tools influence lens machining in a Goiânia industry, which operates on demand, a condition in which materials vary according to customer orders, and it is not possible to control or segment processed materials. The research integrated the review of the surfing methods and the operational monitoring of two high -speed generators. The systematic collection of operational data, coupled with the Ishikawa diagram and the practices of the Six Sigma methodology, has allowed to establish control limits that guide preventive interventions. The results indicate that progressive wear reduces productivity and compromises the optical finish, but that statistical criteria enable exchanges or reafrações at the proper moment, increasing efficiency, reducing rework and minimizing losses.
Aplicação do modelo SERVPERF para avaliação dos serviços em uma clínica de implante capilar
(Universidade Federal de Goiás, 2025-06-12) Aidar, Sofia Peixoto Craveiro; Santos Neto, Agenor Sousa; Soares, Júlio Cesar Valandro; Soares, Júlio Cesar Valandro; Poltronieri, Camila Fabrício; Paula, Vinicius de Faria; Dourado, Rhayane Silva
There is a growing demand for high-tech hair treatments, as well as great competitiveness in the aesthetics market. Understanding the perceived quality of services from the customer's point of view is essential for identifying flaws, guaranteeing improvements, increasing customer satisfaction and developing competitive advantage. However, consumers' views are generally unknown or underestimated, which has a negative impact on customer loyalty and company success. The general aim of this study is to measure and analyse the perception of customers at a robotic hair implant clinic located in the city of Goiânia - GO. To this end, a study was carried out using the SERVPERF scale, where the scale was constructed through refinement stages and then applied to a sample of customers of the aforementioned company. The scale sought to identify customer perceptions of the clinic's services, as well as the relative importance of the scale's attributes. Subsequently, the scale data was collected and its results analysed in descriptive and inferential terms (multiple linear regression), identifying the perception of these customers. In this way, the positive aspects and sore points of the Robotic Clinic were diagnosed, as well as the most relevant items from the customers' point of view. Regression analysis also revealed the attributes of greatest relevance to the construct ‘Satisfaction’.
Gestão da qualidade na formalização de propriedades rurais: um estudo de caso sobre a transição organizacional de pessoa física para jurídica
(Universidade Federal de Goiás, 2025-06-16) Pereira, Matheus Höhl Maffra Magalhães; Dourado, Rhayane Silva; Soares, Júlio Cesar Valandro; Soares, Júlio Cesar Valandro; Tinoco, Cynara Mendonça Moreira; Costa Júnior, Nelson Dias da; Silva, Witalles Martins da
The Brazilian agribusiness sector has experienced significant growth and increased competitiveness in recent decades, demanding the modernization and professionalization of rural properties. Among the challenges faced by the sector, the need for organizational transition of farms from individual (natural person) to legal entity status stands out, a process that entails profound changes in administrative, accounting, and operational structures. This article aims to analyze how the application of quality management tools can contribute to na effective, organized, and regulation- and market-aligned transition in this context. The study was conducted using action research with a qualitative and applied approach, involving the practical analysis of the transition process in three farms belonging to the same economic group in the state of Goiás. The methodology included document analysis, observation of strategic meetings, and the articulated use of tools such as brainstorming, Ishikawa diagram, risk matrix, SWOT analysis, 5W2H, schedules, and the RACI matrix. The focus was on structuring the process stages, identifying risks and challenges, and defining responsibilities and deadlines for the implementation of activities. The results obtained showed that the integrated use of quality tools provided greater clarity in defining the phases of the transition, facilitating situational diagnosis, risk anticipation, detailing of responsibilities, and systematic progress monitoring. The development of a practical framework—composed of schedule, 5W2H, and RACI matrix—proved effective not only for the studied context but also for replication in other rural operations. The article also presents a flowchart with the main phases and decisions involved in the process, serving as a visual reference for sector managers. It is concluded that the structured application of these tools enhances efficiency, governance, and the sustainability of farm formalization, highlighting the importance of collaborative planning and a focus on continuous improvement in Brazilian agribusiness.
Método Green Wave: estudo de caso em Goiânia
(Universidade Federal de Goiás, 2024-03-15) Borginho, Gabriel Correia de Miranda; Medrano, Ronny Marcelo Aliaga; Medrano, Ronny Marcelo Aliaga; Leite, Poliana de Sousa; Morais, Julienne Santana de
The aim of this graduation thesis was to apply the "green wave" traffic light synchronization method to improve the flow of public and private transport in the city of Goiânia. The lack of synchronization between traffic lights has a direct impact on transport services. This study proposes a detailed analysis of the implementation of a "green wave" system with the aim of improving traffic flow on corridor T-7. The work includes the use of software to calculate the green light time at road intersections, demonstrating the benefits of traffic light synchronization in coordinating public and individual transport. The research also takes into account the geometry of the roads and the presence of exclusive lanes for public transport.
Avaliação da influência das variáveis climáticas no desempenho de estruturas de pavimento flexível através de critérios empírico-mecanísticos
(Universidade Federal de Goiás, 2025-06-25) Cordeiro, Marcus Vinicius Soares; Garcia, Liosber Medina; Garcia, Liosber Medina; Silva, João Paulo Souza; Mendes Filho, Walter Manoel
The Brazilian road network, predominantly composed of asphalt pavements, exhibits performance that is highly sensitive to environmental factors such as temperature, humidity, and precipitation. Empirical-mechanistic methods, such as MeDiNa and MEPDG, have been adopted to provide greater accuracy in predicting structural behavior over time. However, these methods—especially the MEPDG—lack proper calibration and adaptation to Brazil’s regional climatic data, as they were originally developed based on conditions in the United States. This research conducts a literature review of the main pavement design methods used in Brazil and abroad, comparing their approaches regarding traffic, materials, and climate. Project parameters and control variables were defined based on local conditions in the city of Goiânia (GO). For the simulations, the AASHTOWare Pavement ME Design software was employed, with its original North American climate database adapted using local meteorological information. The studied pavement structure includes asphalt surface, base, subbase, and subgrade layers, with mechanical properties determined from the literature. The simulation results provided relevant insights into rutting, alligator cracking, and the International Roughness Index (IRI). It was observed that rutting was highly sensitive to variations in temperature and wind speed, with an evaluation indicating that a 5% increase in temperature combined with a 5% reduction in wind speed could compromise up to 11.74% of the structure, especially in the surface layer, which showed variations of up to 20.54% across the simulated scenarios. Regarding alligator cracking, a significant and exponential increase over the years was noted. A noteworthy trend was identified, in which simulations with lower levels of permanent deformation generally exhibited higher cracking incidence. The same trend was observed for the IRI, which showed lower values in scenarios with higher rutting. In summary, these results highlight the importance of considering climatic criteria when applying mechanistic-empirical methods in the design of flexible pavements, especially in regions with diverse climates, such as the tropical conditions present in Goiânia.
Estudo de impactos das mudanças climáticas no sistema de drenagem da bacia do córrego Samambaia, Goiânia - GO
(Universidade Federal de Goiás, 2025-06-25) Sousa, Anna Laura dos Reis; Mendes Filho, Walter Manoel; Mendes Filho, Walter Manoel; Silva, João Paulo Souza; Garcia, Liosber Medina
The development of studies on the effects of global climate change on the hydrological response dynamics of watersheds is an essential aspect of adaptation and integrated management of urban infrastructure in resilient cities. This study focuses on river basins as the unit of analysis for drainage systems in metropolitan regions, which are crucial for addressing the challenges posed by extreme weather events. Although there is evidence on the magnitude of global climate change, predicting its effects at regional and local scales remains a challenge. However, the responsibility of local governments to prepare for these changes is increasing through urban planning focused on climate adaptation. In Brazil, the 2022 census indicated that inland cities and regions have experienced the most growth in the current century. Moreover, since the 1970s, the rural population has declined, with all growth occurring in urban areas. Among the consequences associated with climate change, the country has already recorded a significant increase in extreme events, with cities like São Paulo, Rio de Janeiro, and Porto Alegre facing recurring floods that cause billions of reais in damages annually. In this scenario, more modern drainage systems are essential for mitigating flood events, especially in densely urbanized metropolitan areas. However, the performance of these drainage systems has generated growing concerns as climate change contributes to more intense rainfall and a higher frequency of extreme precipitation events. Thus, alongside changes in hydrological response patterns, there is a need to increase climate resilience in large cities by adapting urban infrastructure to face the challenges posed by these increasingly severe events. In particular, this study adopts the Córrego Samambaia watershed as its study area, located in the municipality of Goiânia, GO. Located in the heart of the Cerrado biome, studies carried out for the Goiânia Metropolitan Region point to the need to analyze the environmental impacts of climate change on the region and its population, incorporating climate projection scenarios into the analysis. This study aims to analyze the impacts of climate change associated with the effects of long-term hydrological projections (the year 2025 to 2040) in the Córrego Samambaia basin, with a focus on the process of generating surface runoff and potential impacts on the planning of urban drainage infrastructure. In view of the above, changes in the patterns of hydrological responses, with regard to the surface runoff component, were obtained by integrating climate projections of precipitation into the SCS (Soil Conservation Service) hydrological model. This study aims to analyze the impacts of climate change associated with the effects of long-term hydrological projections (the year2025 to 2040) in the Córrego Samambaia basin, with a focus on the process of generating surface runoff and potential impacts on the planning of urban drainage infrastructure. In view of the above, changes in the patterns of hydrological responses, with regard to the surface runoff component, were obtained by integrating climate projections of precipitation into the SCS (Soil Conservation Service) hydrological model. The results obtained from the long-term hydrological projections indicate a reduction in the pattern of maximum daily precipitation over the period analyzed, which reflects changes in the pattern of the I-D-F (Intensity - Duration - Frequency) relationships of precipitation. On the other hand, when simulating scenarios with increased sealing in the basin, it was observed that approximately 44% of rainfall could contribute to the generation of surface runoff. In this sense, the study made it possible to assess potential climate impacts in the Córrego Samambaia basin, offering subsidies for future research aimed at adapting and planning drainage systems in strategic regions of the basin, with updates based on new climate projections.
Tecnologias aplicadas aos motores convencionais para redução da emissão de poluentes atmosféricos no setor de transportes
(Universidade Federal de Goiás, 2024-12-11) Alcântara, Ana Flávia Rodrigues; Andrade, Carlos Eduardo Sanches de; Andrade, Carlos Eduardo Sanches de; Guerrero, Cintia Isabel de Campos Roque
The automotive sector, one of the largest contributors to atmospheric pollutant emissions, faces a growing challenge in the search for more sustainable energy alternatives. This article addresses technological innovations in the development of vehicles with lower environmental impacts, focusing on solutions to reduce pollutant emissions. It analyzes motorization technologies, including high-efficiency internal combustion engines, and explores the growing role of renewable fuels, such as ethanol and biodiesel. The transition to electric vehicles is also discussed, highlighting its advantages in terms of reducing emissions, but also the limitations associated with charging infrastructure and battery production. The objective of this work is, therefore, to identify which technological improvements can be applied to conventional engines used in transportation systems in order to mitigate atmospheric pollutant emissions. The method adopted is an integrative bibliographic review of the literature found in the CAPES Journal Portal, the USP Journal Portal, Google Scholar and SCIELO. Technologies already used in conventional engines were studied: automotive catalysts, start-stop systems and diesel particle filters. Added to this are the impacts of the transition to a more sustainable automotive industry, with the use of biofuels and the encouragement of the use of electric vehicles.
Mapeamento geológico 1:20.000 da Região Norte do depósito de cobre do município de Bom Jardim de Goiás - GO
(Universidade Federal de Goiás, 2024-11-29) Oliveira, Bruna Edriane Ramos de; Temporim, Filipe Altoé; Arab, Paola Bruno; Arab, Paola Bruno; Cavalcanti, Débora Ezequiel; Silva, Felipe de Lima da
The Bom Jardim de Goiás (BJG) region is part of the geological context of the Arenópolis Magmatic Arc, located in the far west of Goiás. It became the object of research in the 1970s, after the Geological Survey of Brazil (CPRM) identified radiometric anomalies on the edge of the Serra Negra Granite, which led to the development of extensive research projects. Despite this, the geological complexity of the region and the typology of the deposit are still not fully understood. The Bom Jardim de Goiás Metavolcanosedimentary Sequence features a diversity of volcanic rocks, ranging from metabasalts and metandesites to rhyolites, while the sedimentary portion includes metaconglomerates, phyllites and quartzites. The intermediate tuffs contain a small deposit of copper sulphides, initially associated with volcano-exhalative processes. The general objective of the work was to carry out detailed geological mapping of the northern region of the Bom Jardim de Goiás copper deposit, with the aim of improving understanding of the deposit model by integrating data from aerial images, geophysics, field studies and laboratory analyses. Specifically, the aim was to draw up a 1:20,000 scale geological map with geological profiles, correlate maps of magnetometric and gammaspectrometric domains and homologous zones, carry out detailed petrographic descriptions and reinterpret the structural geology of the area. The study covered an area of 24 km², with semidetailed geological mapping integrated with the interpretation of aerogeophysical data, photointerpreted satellite images and petrographic descriptions. Based on this data, a reinterpretation of the structural geology was proposed and, based on historical information, comparisons were made with the geological model of the deposit. In the pre-field phase, a bibliographic survey and compilation of historical data were carried out. During the field phase, geological mapping was carried out, hand samples were taken and structural data was obtained. In the post-field phase, the geological map and data were prepared in a GIS environment, petrographic description, structural interpretation with stereograms and rosette diagrams, and the information was consolidated in a report. The work involved geological-structural mapping of an area made up of basic and metavolcanosedimentary rocks from the Paleoproterozoic, with the aim of detailing their lithological and structural characteristics. During the study, it was possible to individualize the Metabasalt Lithofacies in the Córrego da Furna Formation, based on magnetometric responses, in addition to identifying new, previously unknown occurrences of sulphides. This data made it possible to propose a different deposit model from the existing ones, contributing to understanding the geological evolution of the area. The analysis also indicated the possible continuity, to the north, of the copper deposit previously identified by CPRM, broadening the region's exploration prospects. In structural geology, four structural domains were defined and at least three phases of deformation recorded in the lithologies were recognized. Domain 1, associated with the Cuiabá Group rocks, has a N-S structural trend and isoclinal folds related to the D1 deformation. Domain 2 covers the Morro do Urubu, Aldeinho and Morro Selado Formations of the BJG Sequence, with a N-S trend and dips to the E and W. Domain 3, associated with the Córrego da Furna and Córrego da Aldeia Formations, where the copper deposit to the south is located, showed the main S1 foliation subdivided into two pole patterns: one in the NE-SE quadrants and the other in the NW-SW quadrants. This garland pattern suggests a second phase of deformation and was the only one to differ from the bibliography. Finally, Domain 4, related to the Serra Negra Granite Unit, showed structures oriented predominantly to the east. These results highlight the tectonic complexity of the area and provide new information on its structural evolution.
Aplicação de machine learning para identificação de corpos máficos-ultramáficos na porção sul da faixa Brasília, Goiás, Brasil
(Universidade Federal de Goiás, 2024-08-02) Barros, Lucas Marques; Tabosa, Luiz Fernando Cursino; Temporim, Filipe Altoé; Temporim, Filipe Altoé; Yokoyama, Elder; Lopes, Débora Nogueira
This research investigates the application of Machine Learning in identifying mafic-ultramafic bodies within a 200 km² area in the southern portion of the Brasília Belt, focusing specifically on the boundary between the Anicuns-Itaberaí sequence and the Anápolis-Itauçu Complex, near the municipality of Anicuns, Goiás.. The study applied the Random Forest algorithm to process and analyze geophysical and remote sensing data, aiming to enhance the geological mapping and detection of these bodies. The research integrated aerogeophysical data, including magnetometry and radiometry, as well as satellite data, in order to develop a robust geospatial dataset. The model was trained using a significant fraction of the dataset to provide a predictive map of geological occurrences. The obtained results demonstrated the high effectiveness of the model, with significant accuracy in discriminating the geological bodies of interest, which were validated by comparisons with field data and provided new insights on the distribution and characteristics of mafic-ultramafic intrusive bodies in the studied area. This study highlights the potential of using Machine Learning techniques in geology, particularly as a supporting tool for mineral prospecting, as well as providing more accurate and detailed geological maps.
Mapeamento geológico, gravimetria e trama magnética do corpo intrusivo Córrego Seco, Anicuns-GO
(Universidade Federal de Goiás, 2024-08-02) Costa, Gustavo de Souza; Temporim, Filipe Altoé; Temporim, Filipe Altoé; Souza Junior, Gelson Ferreira de; Rodrigues, Sérgio Wilians de Oliveira
The Corrego Seco (CS) pluton is situated in the Arenópolis Magmatic Arc, located in the southern portion of the Brasília Belt (FB). It is a semi-circular intrusive body (30 km²) that intrudes rocks of the Anicuns-Itaberaí Metavolcanosedimentary Sequence and the Tonian-aged Sanclerlândia metagranite. The pluton exhibits inverse concentric zoning with a mafic core (gabbro/noritic) grading to quartz-dioritic edges with medium to coarse textural grain size variation. Additionally, studies conducted in the region using isotopic data and geological mapping indicate that the CS (Ediacaran) has a late emplacement and may crystallize from more evolved magmas derived from the final tectonic collision event of the Brasília orogen. Geological mapping, gravimetry, and anisotropy of magnetic susceptibility (AMS) data were combined to determine the emplacement mechanisms of the CS and its chronology in relation to the collision structure of the Brasília Belt. The gravimetric survey resulted in 72 stations using a Scintrex CG-5 Autograv terrestrial gravimeter. For the AMS, 28 sites were measured throughout the body. Magnetic susceptibility is quite variable (average of 4.72x10-² SI) and thermomagnetic curves indicate that magnetite is the main carrier of anisotropy. It has a high degree of anisotropy ranging from 1.012 to 1.502. The average shape parameter of anisotropy, defined as the ratio between the major and minor axes of the AMS ellipsoid, varies, with oblate ellipsoids being predominantly more abundant than prolate ones. Magnetic foliation and lineation data present concentric patterns of magnetic fabrics that cut across the regional N-S trending foliation. Hysteresis loop measurements indicate that the magnetic contribution comes from magnetite, i.e., crystals larger than 1 μm, and its susceptibility anisotropy is controlled by the external shape of the grains. The gravimetric data obtained from the field survey reflect the inversely zoned distributions, grading from the edges to the core. The data suggest that the emplacement was controlled by magma buoyancy forces, free from tectonic stresses. Therefore, the data indicate that the pluton is post-collisional, configuring an intrusion associated with the extensional phase of the Brasília Belt.
Caracterização dos perfis de solo derivado da fácies anortosito da suíte Córrego das Campinas, associado à ocorrência de caulim, na região de Porangatu, Trombas e Santa Tereza de Goiás, Goiás
(Universidade Federal de Goiás, 2024-08-03) Maia, Débora Santos; Lima, Hugo Figueiredo de; Vieira, João Emerson Vasconcelos Leite; Reis, Mateus Andrade; Reis, Mateus Andrade; Canile, Fernanda Maciel; Arab, Paola Bruno
Considering the countless applications of clay minerals in the industry in its most diverse ramifications, the present work sought to characterize the soil profiles in the triple border of the municipalities of Trombas, Porangatu and Santa Tereza de Goiás, in the State of Goiás. In order to characterize the type of existing material, which uses and how it occurs throughout the entire study area. To this end, it was necessary to map the occurrences of rock and soil, analyze the physical, chemical and mineralogical properties of the soils and its horizons. Then it was carried out photo interpretation work looking for clear exposures of soils (clearances) and rock exposures. During the field activity, systematic sampling of variations in soil intervals and soil types was carried out, in addition to rock sampling. Sampling was done in the form of channel and spot sampling. Subsequently, geochemical analysis and geotechnical tests of the material were carried out in the laboratory. Therefore, it was verified that the existence of kaolinite, the main constituent of kaolin. The kaolin in the locality is primary, resulting from the alteration of the source rock (anorthosite) and is mainly associated with the B horizon of the soil. It is commonly noted that a superficial laterite crust, associated with alluvial deposits, contains concentrations of iron and titanium oxides in the kaolin, which interfere with the color of the material, making it possible to identify horizons of different colors such as red, yellow and white. It can be concluded that the soil profile in the study area is mostly composed of clay minerals, laterite crust and alluvial deposits. The color of the kaolin horizons is mainly due to the iron present in the laterite crust and minerals present in the anorthosite. It is necessary to process the material to remove the iron for applications in industry in general.
Mapeamento geológico 1:5.000 e caracterização litogeoquímica para remineralizadores na região de Nazário-GO
(Universidade Federal de Goiás, 2024-07-30) Silva, Guilherme Fellype Xavier; Temporim, Filipe Altoé; Nascimento, Estela Leal Chagas do; Nascimento, Estela Leal Chagas do; Reis, Mateus Andrade; Martins, Éder de Souza
The intensive use of highly soluble chemical fertilizers (NPK) causes significant environmental impacts, proving the need to seek new alternatives to nourish the soil in less aggressive ways to the ecosystem. The use of rock dust to replenish nutrients to the substrate, known as rock dusting, is a technique that has stood out in recent years as a sustainable alternative to achieve this purpose. It can also be an option for properly disposing of mining waste. Normative Instruction No. 5 of March 10, 2016, from the Ministry of Agriculture, Livestock, and Supply (MAPA) stipulates that rocks efficient in replenishing nutrients to the substrate must meet certain criteria established by the agency. In recent years, the state of Goiás has become extremely relevant in the production of remineralizers. Keeping this in mind, DECAL – Derivados de Calcários Ltda contracted the services of Vila Rica Consultoria Mineral e Ambiental Ltda to conduct mineral research in the region of Nazário-GO, aiming to evaluate the potential of the region for the creation of a remineralizer product. The work includes field mapping, optical microscopy, chemical analyses using ICP-MS/OES (Inductively Coupled Plasma Mass Spectrometry), XRF (X-Ray Fluorescence), and SEM-EDS (Scanning Electron Microscopy with Energy Dispersive Spectroscopy) to perform quantitative and qualitative analysis of the lithologies of interest and studies of potentially toxic elements. As a complement to the field mapping, a geophysical survey of magnetic susceptibility was carried out to delineate and obtain more information about the geology of the work area. Based on the chemical analyses of the selected lithotypes, theoretical simulations were conducted to create a remineralizer compound composed of a blend of rock dust from various lithologies.
Química mineral e caracterização tecnológica de milonitos da região de Araguaçu-TO para aplicação no setor de rochas ornamentais
(Universidade Federal de Goiás, 2024-07-30) Souza, Elifas Guimarães; Reis, Mateus Andrade; Nogueira Neto, José de Araújo; Nogueira Neto, José de Araújo; Silva, Francisco Diones Oliveira; Cavalcanti, Débora Ezequiel
The study in question deals with the technological characterization and mineral chemistry of a mylonite located in the municipality of Araguaçu, situated in the Western mesoregion, southern region of the State of Tocantins, and the Rio Formoso microregion, bordering the State of Goiás. Geologically, this area is part of the north-central portion of the Tocantins structural province, at the still poorly defined boundary of the Brasília and Araguaia orogens. The main objective of the work was to carry out lithostructural mapping of the area, characterize the mineral chemistry, and assess the potential of mylonitic rocks occurring in the Araguaçu-TO region for use as ornamental stone. The aim was to evaluate their technological parameters, in accordance with the standards of ABNT, ASTM, and Frazão and Farjallat, to indicate this material for applications in the ornamental stone market. In recent years, there has been a significant increase in demand for ornamental stones, driven by the growth of the construction industry and tourism, which has put great pressure on deposits and increased the need for sustainable management of natural resources and the search for alternative production methods. In the study area, four lithotypes were mapped from the base to the top: I - Baixo Araguaia Group, specifically the Xambioá Formation; II - Água Bonita Formation; III - Mylonite, the subject of this study; and IV - Detrital-lateritic covers, showing a predominantly NE-SW structure. The study provides a geological base at a scale of 1:30,000. The results suggest that the mylonite is suitable for various applications in the construction industry, such as floor and wall coverings, countertops and sinks, facades and exterior cladding, staircases, among others.
Mapeamento geológico em escala de semidetalhe (1:50.000) na porção sudeste do município de Campinaçu – GO
(Universidade Federal de Goiás, 2024-07-31) Rocha, Eric Gonzaga; Secco, Henrique Pereira; Temporim, Filipe Altoé; Reis, Mateus Andrade; Reis, Mateus Andrade; Rodrigues, Sérgio Wilians de Oliveira; Cavalcanti, Débora Ezequiel
The municipality of Campinaçu has economic potential related to various mineral deposits, with emphasis on gold, a mineral that has a history of mining in the Serra Grande region, popularly known as Serra do Buracão. The mapping area is located in the inner zone of the Brasília Belt, more specifically in the Serra da Mesa Group. Geological mapping in the region of interest used geoprocessing, photogeology, field mapping and sampling, scouting campaigns, petrographic and petrological analyzes to create a geological map at a scale of 1:50,000. After mapping, three main lithostratigraphic units were delimited, namely: Garnet shale-mica schist, composed of garnet-biotite-sericite schist, biotite-sericite schist, biotite-muscovite schist, a faciological variation with the presence of carbonaceous shale schist lenses; Quartzite, consisting of muscovite quartzite with centimeter lenses of mica schist; Mica schist with lenses of fine quartzite and calcschist. With the delimitation of lithological contacts, it was possible to generate a stratigraphic column for the area. The structural features mapped are the result of 4 (four) deformational events (D1, D2, D3 and D4), related to tectonic events west of the Rio Maranhão System, where the deformation of the Serra da Mesa rocks is polyphasic. These events were responsible for the generation of schistosities, spaced cleavage and crenulation, veins and folds. The economic potential of the region is related to gold mineralization, which may have generated a phylonian gold deposit in detrital metasediments, where milky quartz veins larger than 50cm, discordant with the foliations, have the potential to host free gold. The veins occur both north and south of Serra do Buracão, in addition to its crest, evidenced by isotheor maps of the distribution of this element. These veins are oriented in the NNE-SSW and W-E directions, associated with the D3 event. Chemical analysis showed a positive correlation between gold and elements such as lithium, lead, titanium, sulfur, zinc and zirconium.
Mapeamento geológico-estrutural e estudo do potencial exploratório de mineralizações auríferas em metadolomitos da área adjacente a unidade Mineração Serra Grande, município de Crixás (GO)
(Universidade Federal de Goiás, 2024-05-03) Santos, Karina Louanny de Paula; Souza, Lauriana Vitória Gonçalves; Machado, Victtor Gabriell de Lima; Melo, Rodrigo Prudente de; Rodrigues, Sérgio Wilians de Oliveira; Rodrigues, Sérgio Wilians de Oliveira; Melo, Rodrigo Prudente de; Schroeder, James; Nogueira Neto, José de Araújo
The mineral deposits of the Crixás Greenstone belt (GBC) are inserted in the context of the Goiás Granite-Greenstone belts Terranes and comprise one of the largest gold reserves in Brazil. The ore bodies explored in Mineração Serra Grande (MSG) unit encompass several lithotypes with mineralization hosted in zones closely related to structural and hydrothermalized domains. The gold mineralizations hosted in Structure IV metadolomites of the Ribeirão das Antas Formation are one of the main challenges of the operation, due to the complexity of the mineralization model, which is still unexplored in calciosilicate rocks from Greenstone belt environments. This work aimed at geological-structural mapping on a 1:15,000 scale of an area of approximately 27 km2 located on the western and southern margins of the Serra Grande Mining site, the study of exploratory potential for the metadolomites of the Ribeirão das Antas Formation was also commented, especially for the layers that are expoused on surface to the south of the mapped area. Three deformational events were identified in the area: D0+D1, D2 and D3 which correspond, respectively, to S0//S1, referring to the primary bedding parallel to the schistosity generated by an E-W compression; S2, referring to a schistosity generated by the thrusting of the Mara Rosa Magmatic Arc at north of the GBC; and S3, which summarizes an E-W compression reported in crenulation cleavages. Field data obtained from surface, mine mapping and description of drilling cores integrated with three-dimensional geological models were used to evaluate the exploratory potential of the metadolomite bodies outcropping in the southern portion of the MSG and their relationship with the mineralized structures in other areas of the deposit. The product generated in this work aims to expand knowledge of the geometry and spatiality of these lithologies in order to facilitate and reduce initial costs of advanced drilling campaigns in the area, in addition to proposing a model of interaction between the gold mineralizations of these layers and the explored structures in MSG.
Metamorfismo da sequência Anicuns-Itaberaí na região de Nazário-GO
(Universidade Federal de Goiás, 2024-07-22) Brod, Gabriel Silveira; Vieira, Otávio Passo; Melo, Rodrigo Prudente de; Temporim, Filipe Altoé; Temporim, Filipe Altoé; Cavalcanti, Débora Ezequiel; Grella, João Victor
The Anicuns-Itaberaí Sequence is one of the metavolcanosedimentary sequences that make up the Arenópolis Magmatic Arc. However, even with the abundance of research found in the literature related to geochemical, isotopic and geochronological aspects, there is still little material on petrology and structural geology with a focus on the metamorphic evolution of these rocks, which makes the tectono-metamorphic evolution of these sequences still poorly understood. This work aimed to establish, through geological mapping, structural interpretation and petrological studies, a greater understanding of the metamorphic conditions (P-T) that the rocks of the Anicuns-Itaberaí Sequence were subjected to during the metamorphic evolution of the Brasília belt. The results of this work include geological mapping on a scale of 1:50,000 of the region bordering the municipalities of Anicuns, Avelinópolis, Nazário and Palmeiras de Goiás. It also includes the integration of structural, microstructural and petrological data, and the creation of compositional maps of two samples of garnet-chlorite-biotite-muscovite schist from the area that were made using XMapTools software from electron microprobe data. The mineral assemblage of these rocks, given by garnet + plagioclase + biotite + muscovite + quartz + chlorite, was modeled geothermobarometrically using the Bingo-Antidote extension. The modeling results suggest that the metamorphic peak occurred in amphibolite facies conditions (staurolite zone), with retrometamorphism during crustal exhumation to green schist facies conditions. The results show small differences in values between the samples. In sample 23GO_022-P1 the conditions obtained were 630.9 °C and 1.007 GPa for the peak of metamorphism and 536.6 °C and 0.588 GPa for retrometamorphism, while for sample 23GO_025-T1 the conditions were 654.2 °C and 1.198 GPa for the metamorphic peak and 569.9 °C and 0.703 GPa for retrometamorphism. These values indicate that, although there is a small difference between the P-T results between the two samples, the P-T amplitude between the metamorphic peak and the retrometamorphism are very similar for the two samples, which suggests that these differences may be related to different levels of burial between the two samples during the metamorphic process. Finally, it should be emphasized that the data presented in this work provides new information on the geological evolution of these rocks and also shows the need for more studies of this type in the area, including geochronological data on metamorphic rocks in order to better understand the relationship between metamorphism and the tectonic events that affected the region.
Avaliação do ganho ambiental com o uso da bicicleta de carga na última milha - uma revisão sistemática da literatura
(Universidade Federal de Goiás, 2023-09-22) Oliveira, Fernando Soares Ribeiro de; Guerrero, Cintia Isabel de Campos Roque; Andrade, Carlos Eduardo Sanches de; Andrade, Carlos Eduardo Sanches de; Souza, Alessandro de Santana Moreira de
The continuous growth of cities entails the demand for the use of means of transport, both for passengers and cargo. In the last mile, conventional means of transport are used, which consume fossil fuels, but more and more people are looking for other transport alternatives that live better with the environment. An example is the transport by bicycles and cargo tricycles, which can be used as sustainable alternatives for transporting cargo in the last mile. This work aimed to apply a Systematic Literature Review on using these vehicles in the last mile to evaluate the environmental gain obtained. The PRISMA methodology was used, and it led to quantitative and qualitative results relevant to the theme. Ten published articles were selected, seeking to obtain the state of the art of these sustainable transport alternatives worldwide. The results showed that the use of bicycles and tricycles is successfully applied to small and medium-sized goods, food products, pharmaceuticals, and documents, among others, and has significantly contributed to the reduction of congestion, CO2, traffic accidents, and local pollutants, increasing the quality of life in cities. An analysis of the results and its application in Brazil was carried out, where the potential for use was found, but in need of improvements in cycle paths and implementation of pilot projects.
Mapeamento geológico da região das nascentes do Rio Vermelho e arredores no município de Goiás (GO) em escala 1:20.000
(Universidade Federal de Goiás, 2023-08-29) Gomes, Camila de Sousa; Altoé, Elisandro Seraco; Macedo, Sarah Karoline Costa; Rodrigues, Sérgio Wilians de Oliveira; Rodrigues, Sérgio Wilians de Oliveira; Lima, Martha Noélia; Carneiro, Jônatas de Sales Macedo
The present work consists of a detailed geological mapping study in the region of the headwaters of the Vermelho River and adjacent areas in the municipality of Goiás (GO), carried out at a scale of 1:20,000. The main objective of the study was to analyze and describe the geological characteristics of the region, aiming to understand its geological and structural evolution. The adopted methodology involved fieldwork, analysis of collected data, such as direct observations of rocks and geological structures, as well as the collection of samples for petrographic and geochemical analysis. Additionally, geophysical data and topographical survey information were used to assist in the interpretation of geological features. Fourteen lithological units and alluvial cover were identified. These units were placed in the context of existing literature. Petrographic analyses allowed the characterization of rocks in terms of mineralogy and texture, contributing to the interpretation of formation and metamorphic conditions. Geochemical analyses aided in understanding the chemical characteristics of the rocks, providing insights into the provenance of the rocks and associated geological processes. This geological mapping study provides important insights into the geology of the study area, such as the relationships between the mafic-ultramafic rocks of the Goiás Velho Group and the Caiçara Complex, and between these rocks and the Serra Dourada Group. The findings are relevant not only for understanding the local geological evolution but also for comprehending geological phenomena in broader contexts. Furthermore, the mapping serves as instrumental material for Ediminas Mineração Ltda, providing support in the context of their mineral exploration activities.
Modelo de acidente de aeronaves por colisão com aves na aviação comercial
(Universidade Federal de Goiás, 2023-09-22) Azevedo, Bruna Borges; Bandeira, Michelle Carvalho Galvão da Silva Pinto; Bandeira, Michelle Carvalho Galvão da Silva Pinto; Roriz Junior, Marcos Paulino; Pereira, Leonardo Marini
One of the types of occurrences that have been a problem since the beginning for aviation is bird strikes, which can generate from minor incidents to significant accidents, especially in terms of operating costs for airlines. It is observed in the literature and in the database of official entities, that the occurrence of accidents and incidents increase with the flight movement and aircraft fleet. This shows that studies in this area should be prioritized and bring more assertive responses. Thereby knowledge about what the main factors, how they relate to each other and what most impact this type of accident, collaborates with the operational safety of air transport. In this context, this work aims to present a bird strike accident model for commercial aviation that is able to quantify the impact of the main factors (time, cloud cover, species behavior, species mass, phase of flight, AGL height, affected part of the aircraft), the interrelation of these factors and their probabilities. Thus, a survey of the main factors and occurrences in Brazil between 2011 and 2021 was conducted. From the analysis, the "Bird Strike Accident Model" was proposed, developed using the Bayesian Networks method. Through graphic representation of the model, the impact of the global - among the states that make up the selected factors - was determined in scenarios with and without evidence. Comparing the scenarios with evidence and without evidence of the event, it was identified that the critical scenario in Brazil involves the following factors: fuselage as the main part reached (1º); landing phase as the most critical (2º); aircraft speed up to 80 knots (3º); engine as second main part reached (4º); height AGL up to 500 feet (5º); radome as third main part reached (6º); one bird (7º), mass up to 1,500 grams (8º); night time (9º), clear sky (10º). These results are relevant to the players involved and can contribute to the decision-making process of risk management and operational costs management of airport operators, companies, public and private entities that are related to accident investigations, regulation of civil aviation, training centers, among others.

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