Documentação de convênios e P&D

URI permanente desta comunidadehttps://rigalileo.itegam.org.br/handle/123456789/173

Trabalhos ténico-científico oriundos de convênios com universidades para oferta de turmas de mestrado e doutorados no Estado do Amazonas

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A Sílica Livre Cristalizada e as Condições de Trabalho em Santarém-PA
(Universidade Federal do Pará, 2015) CAVALCANTE, Clarissa Maciel; POMPEU NETO, Bernardo Borges
Silica (SiO₂) is one of the most abundant elements in the Earth's crust, and in its crystalline form, it is toxic to humans, potentially causing silicosis and even cancer with prolonged exposure. This study investigates working conditions in marble workshops in Santarém-PA and the risks of exposure to crystalline silica. The research involved visits to four companies in the sector, using the Ministry of Labor and Employment’s Reference Manual for Marble Workshops as an evaluation tool. The results indicate a lack of worker training and misinformation about occupational hazards. Collective protection measures, such as wet-cutting machines, are adopted but not strictly enforced. Personal protective equipment is provided but not consistently used. The study concludes that exposure to free crystalline silica in the region’s marble workshops is high and poses a significant health risk to workers. It emphasizes the need for surveillance actions and further investigations to improve working conditions and worker health protection.
Análise da Transferência de Calor em Sistemas de Refrigeração de Unidades de Processamento de Dados
(Universidade Federal do Pará, 2018) CARDOSO, Fabiano Stingelin; QUARESMA, João Nazareno Nonato
The highest operational temperature for a CPU without interruption is 90 °C. When processor TDP is high, conventional heat sinks may be inadequate under full load. This study investigates thermal transfer using the DTML method in a liquid cooling system for an Intel® Core™ i5-3330 processor at 3.0GHz. The experiment used a Thermaltake cooling kit, measuring flow rate, inlet and outlet fluid temperatures in the water block. Results showed that under full workload, the CPU reached 75°C with a standard cooler and 53°C with the watercooler, leading to operational efficiency and an energy saving of 0.439 W compared to a traditional heat sink.
ANÁLISE DA USINABILIDADE DA LIGA AL-7%SI SOLIDIFICADA EM UM SISTEMA UNIDIRECIONAL HORIZONTAL
(Universidade Federal do Pará, 2014) GUIMARÃES, Charles Bispo; SILVA, Maria Adrina Paixão de Souza da
Machining is one of the most widely used manufacturing processes, with metals and alloys forming a large percentage of machined materials. During machining, a significant amount of energy is converted into heat, making the cutting temperature a crucial factor. However, few studies assess the influence of the workpiece structure on the cutting temperature. In this context, the relationship between processing, structure, and material properties is critical, as the solidification structure directly affects machinability. This study investigates the influence of thermal parameters and secondary dendritic arm spacing (λ2) of an Al-7wt%Si alloy solidified in a horizontal directional solidification system on cutting temperatures obtained during turning. A significant increase in cutting temperature was observed in all tests, followed by a slight decrease at the end of the process. Furthermore, experimental power function laws relating cutting temperature with cooling rate, solidification rate, and secondary dendrite arm spacing were developed.
Análise de Tensões Residuais e Flechas em Soldas Planas de AISI 1020 Através de Ensaios de Tração, Microdureza Vickers e Mediçõees por Passe
(Universidade Federal do Pará, 2014) SANTOS, Carlos Augusto Cayres; FUJIYAMA, Roberto Tetsuo
Temperature in the Heat Affected Zone (HAZ) changes according to its position, with time, and cooling conditions during solidification. This variation in temperature can produce phase changes along the crystalline structure and thermal dilatations that originate welding residual stresses. In this work, deflection per passes was analyzed with height measurements, residual stresses in Base Metal (BM) were analyzed with tension tests, in the Heat Affected Zone (HAZ) and Fusion Zone (FZ). The variation through-thickness inside the Heat Affected Zone (HAZ) region was evaluated using Vickers microhardness tests for four different welds: the first one without restraints, the second fully restrained, the third with parallel restrictions on the weld bead, and the fourth with perpendicular restrictions to the weld bead. The results for each weld allowed modeling the deflection through linear adjustments, determining the stress profile according to the type of restraints adopted, the region in which the welded joint shall fail, and identifying regions that present beneficial or harmful stresses according to the type of restrictions and loading. The study concluded that deflection can be mathematically modeled as a welding pass function, and residual stresses observed in the HAZ and Fusion Zone (FZ) increase through thickness.
ANÁLISE DO ACÚMULO DE MATERIAIS ORGÂNICOS NAS ESTRUTURAS NAVAIS DOS TERMINAIS HIDROVIÁRIOS: ESTUDO MULTICASO – ELEMENTOS DE GESTÃO AMBIENTAL
(Universidade Federal do Pará, 2014) HARTZ, Alessandra Guimarães; MENDES, Ronaldo L. R.
This study aimed to diagnose the causes of the recurrent problem of organic material accumulation in naval structures of waterway terminals in Manacapuru/AM, Humaitá/AM, Parintins/AM, and Manicoré/AM, already installed. This issue arises because the projects for these structures do not consider the fluvial water system and regional geography. Many of these terminals are under construction, while others are already operating but face difficulties, especially during flood seasons, due to the accumulation of organic matter in their structures. The methodology included bibliographic and documentary research. Given this context, the study suggests that authorities seek efficient solutions with designers to mitigate environmental damage and raise awareness about this issue in future projects. An immediate, efficient, and low financial impact solution for the Union is needed.
Aplicação do Método Fuzzy no Controle da Geração de Acetaldeído na Resina PET no Processo de Injeção de Pré-Formas de Embalagens Plásticas
(Universidade Federal do Pará, 2018) MONTEIRO, Carlos Alberto; MACÊDO, Emanuel Negrão
In order to control the drying temperature of PET resin in the silo of a plastic injection molding machine during the plastic injection process in industries producing preforms for beverage bottles, it is necessary to carefully regulate the ideal temperature. This impacts the control of Acetaldehyde (AA) generation, a substance that alters the taste of carbonated and non-carbonated drinks. This work aims to develop a tool based on Fuzzy logic to support the control of PET resin drying temperature, allowing specialists to make ideal temperature regulation decisions. The Fuzzy inference model was implemented using Matlab’s Fuzzy toolbox, considering input variables, Fuzzification rules, and output variables based on collected data from the preform injection process. The inference model resulted in more precise management of variables influencing AA generation, estimating an annual cost reduction of R$ 907,200.00 in preform production.
Aplicação do Método Schumacher como Alternativa para Calibração e Validação de Torquímetros no Processo de Montagem de Motocicletas
(Universidade Federal do Pará, 2018) BRANDÃO, Leonize Thomé de Souza; MAGALHÃES, Edilson Marques
This case study analyzes the calibration and validation process of torque wrenches in a motorcycle assembly plant. Torque wrenches are validated within a short period under strict parameters to ensure compliance, requiring time availability and, in some cases, new equipment. The objective is to optimize this process, making it more efficient and reducing costs without compromising product quality. As an improvement alternative, this study proposes the reformulation of calibration periodicity using the Schumacher Method and reassessment of the approval and rejection parameters. The study followed the implementation of these improvements over six months, demonstrating positive results in reducing process time and increasing the efficiency of torque inspections.
Aterro Sanitário - Proposta Relevante para Reduzir os Lixões nas Cidades de até 100.000 Habitantes
(Universidade Federal do Pará, 2016) LOPES, Enildo Batista; SOUZA, José Antônio da Silva; RODRÍGUEZ, Jorge Laureano Moya
This dissertation presents a study on solid waste management in Brazilian cities with up to 100,000 inhabitants, focusing on the need to replace dumps with landfills. The work addresses the challenges of environmental management and proposes solutions for the adequate disposal of waste, aiming to preserve public health and the environment. The research includes a literature review and suggests the construction of a landfill as a viable alternative to mitigate the negative impacts of dumps, as well as discussing the importance of environmental education and community involvement.
AUTENTICAÇÃO BIOMÉTRICA BASEADA NA DINÂMICA DA DIGITAÇÃO EM APARELHOS DE TELEFONIA MÓVEL
(Universidade Federal do Pará, 2012) MATTOS, Edma Valléria Cunha Urtiga de; OLIVEIRA, Roberto Célio Limão de
This paper proposes a new approach to biometric authentication based on keystroke dynamics in mobile devices. The methodology is easily accessible and can be used by anyone familiar with mobile phones. Users store their information in the system, creating an access account. During password entry, the system tracks the time taken to press and release keys and compares these parameters with stored data. If the patterns match, the user is authenticated; otherwise, access is denied. The study analyzed parameters such as input capture time, individual user models, and ideal thresholds. This approach enhances security, ensuring that even if an impostor knows the password, only the legitimate user can gain access.
AVALIAÇÃO DA CAPACIDADE DE CARGA GEOTÉCNICA E RECALQUE DE ESTACAS HÉLICE CONTÍNUA MONITORADA EM UM EDIFÍCIO DE RIO BRANCO – AC
(Universidade Federal do Pará, 2013) DAMASCENO, Davi Luiz Gruhn; ANJOS, Gérson Jacques Miranda dos
This dissertation evaluates the geotechnical load capacity and settlement of Continuous Flight Auger (CFA) piles used in the construction of the Federal Police Superintendency (DPF/AC) in Rio Branco, Acre. The building comprises three blocks separated by expansion joints, featuring a basement, four floors, an engine room, and a heliport. The foundations include isolated footings and CFA piles, with the latter being the focus of this study. Using soil stratigraphy and NSPT data from SPT boreholes, a computational program was employed to assess the geotechnical load capacity of the piles using various methodologies, including Aoki & Velloso (1975), Monteiro (1997), Kárez & Rocha (2000), Antunes & Cabral (1996), Gotlieb et al. (2000), and Décourt & Quaresma (1978/1996). Settlements were estimated using the Pile Settlement Calculation (Module 15) software, which applies Aoki & Lopes’s (1975) method. Results showed a wide variation between the methods analyzed, leading to pile depths lower than those in the original design. The estimated settlements ranged from 1 to 8 mm, and the angular distortion between contiguous piles did not compromise the building’s functionality.
Avaliação dos Riscos no Ambiente de Trabalho do Professor em uma Instituição de Ensino com Base nas Normas Regulamentadoras
(Universidade Federal do Pará, 2018) QUEIROZ JÚNIOR, Fernando Cardoso de; LEITE, Jandecy Cabral
This work focuses on evaluating the work environment of teachers in a teaching institution in Manaus regarding painful, unhealthy, and perilous activities according to the Ministry of Labor and Employment regulations (NR-15, NR-16, and NR-17). The research analyzed 19 classrooms, 18 laboratories, and a population of 85 teachers, assessing exposure risks according to labor legislation. The study was conducted from October 2017 to March 2018.
Características Físico-Químicas das Argilas Utilizadas na Indústria de Cerâmica Vermelha no Município de Tabatinga-AM: Um Estudo de Caso em Indústrias do Município
(Universidade Federal do Pará, 2016) SABINO, Artemizia Rodrigues; MAGALHÃES, Edilson Marques; SOUZA, José Antônio da Silva
The red ceramic industry in the state of Amazonas has its main production hub in the city of Iranduba and the metropolitan region of Manaus, with increasing annual demand. The municipality of Tabatinga, despite having few records in the regional industry, has been gaining prominence in the local economy through the production of ceramic bricks, impacting housing quality and generating jobs. This study analyzes the physicochemical properties of the clays used in the manufacture of blocks and tiles, aiming to obtain an optimal composition to enhance the quality of ceramic products. Test specimens were produced with different proportions of white and red clay and subjected to tests for water absorption, porosity, and mechanical resistance. The results showed that the final strength of the material is directly related to the plasticity of the red clay, resulting in a product with a strength exceeding 20 MPa, as required by the ABNT NBR 6220/1997 standard.
CONCRETOS FABRICADOS COM AGREGADOS GRAÚDOS DISPONÍVEIS EM SANTARÉM E REGIÃO OESTE DO PARÁ
(Universidade Federal do Pará, 2015) MAIA, Carlos Tadeu Arantes; SOUZA, Paulo Sérgio Lima
The study examines structural concrete production using different coarse aggregates available in Santarém, analyzing fresh and hardened state properties. Gravel, pebble, and quebradinho were tested with three water/cement ratios (0.74, 0.54, and 0.41). Results showed lower water consumption with pebble and higher final strengths with gravel. A cost analysis highlighted the economic advantage of quebradinho for 20 and 30 MPa concretes. Findings support the feasibility of using local aggregates in concrete production.
Desenvolvimento de um Workflow para Teste de Qualidade de TV" Subtítulo: "Automação do Processo de Inspeção Interna do Comprador (IBI)
(Universidade Federal do Pará, 2017) GONÇALVES, Bruno Pereira; QUARESMA, João Nazareno Nonato
This study proposes the development of a Workflow to automate the quality testing process of televisions (TV) within the scope of the Internal Buyer Inspection (IBI). The aim is to reduce the effort of the testing team and improve the efficiency and effectiveness of quality tests. The Workflow was implemented at a prototype level, integrating an information system, a data collector, and a control unit. The results demonstrated the feasibility of automating the tests, with the execution of 2,400 tests in 11 hours and 40 minutes, in addition to 8,404 power readings. The system also generated traceability reports and monitoring graphs, contributing to the standardization and improvement of the quality process.
Escola de Negócios
(teste, 2024) Pink, Claudia; teste
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ESTUDO DE CASO DO ABASTECIMENTO D’ÁGUA DO MUNICÍPIO DE SANTARÉM NO PARÁ
(Universidade Federal do Pará, 2015) ANDRADE, Elen Conceição Leal de; MENDES, Ronaldo Lopes Rodrigues
This work addresses the water supply in the municipality of Santarém, Pará, and the various factors that directly affect the population's use of this resource. The main objective was to assess water usage in the supply sector, quantifying and qualifying its various forms to contribute to sustainability indicators. Currently, the municipality is supplied by the Pará Sanitation Company (COSANPA) and the Municipal Supply Secretariat (SEMAB). The research was conducted in three stages: literature review, field survey, and result analysis. Findings indicated that most of the population does not waste water, although the absence of water meters makes accurate consumption measurement difficult. Water quality was rated as average by 21.57% of respondents, while 33% reported frequent water shortages, leading part of the population to rely on private wells. The study concludes that understanding these findings can contribute to future projects aimed at improving water supply in the municipality.
ESTUDO DO PROCESSO DE SOLDAGEM DE CONECTORES HDMI EM PLACAS DE NOTEBOOK
(Universidade Federal do Pará, 2014) VIEIRA, Antonio da Silva; FUJIYAMA, Roberto Tetsuo
Derived from broader studies on improvements in the manufacturing processes of electronic products and computer hardware, this research aims to technically evaluate the weldability quality of the HDMI connector in the soldering process of Printed Circuit Boards (PCB) in notebooks. The study seeks to meet international acceptability criteria related to the solder fill of terminal components using Pin Through-Hole (PTH) technology, as specified in the IPC-A-610D standard. For the development of this research, the PDCA (Plan, Do, Check, Action) method was adopted, commonly used as a tool for problem-solving and continuous improvement in various industrial sectors. The analysis using X-ray inspection and metallographic cross-section tests demonstrated that the HDMI connector soldering process using reflow soldering showed better quality than manual soldering, ensuring product reliability. Based on the results achieved, the company in this study replaced manual soldering with SMT technology, employing the Pin in Paste (PIP) and reflow soldering processes.
Fluxo de Potência em Minirrede de Distribuição com Gerador Fotovoltaico Centralizado e Disperso em Comunidade Isolada
(Universidade Federal do Pará, 2018) RAMOS, Marcello Paulino; MACÊDO, Wilson Negrão
This study presents a project proposal for an Isolated System of Generation and Distribution of Electric Energy (MIGDI) through a photovoltaic plant and its respective load flow study. Following ANEEL’s Normative Resolution 493 and other applicable technical standards, the study includes solar resource assessment, demand estimation, PV generator sizing, battery bank, charge controller, inverter, distribution network, and power flow analysis. Simulations compare centralized and dispersed photovoltaic generation scenarios, evaluating energy losses and suitable electrical parameters. The study proposes a methodology for electricity supply in isolated communities in the Amazon, ensuring energy quality and efficiency.
Gerenciamento de Resíduos Sólidos no Restaurante e Centro de Produção de Alimentos do Trabalhador do Comércio Hélio Nobre na Cidade de Manaus
(Universidade Federal do Pará, 2018) BRAGA, Edméa de Araújo Serra; BRASIL, Davi do Socorro Barros
Due to industrial development, urban population growth, and increasing consumption, environmental concerns have intensified. This study analyzes the application of the SESC Solid Waste Management Guide at the Restaurant and Food Production Center of the Hélio Nobre Trade Worker in Manaus. The objective is to implement the Solid Waste Management Plan (PGRS) based on the National Solid Waste Policy (PNRS) to reduce the amount of waste generated and optimize its destination. The research included a qualitative and quantitative approach and showed that, although the SESC unit seeks to follow the PGRS, there are still actions to be developed to improve the waste management system.
Gerenciamento de Resíduos: Sustentabilidade e Redução de Custos em uma Grande Empresa de Bens de Consumo Não Duráveis no Polo Industrial de Manaus - AM
(Universidade Federal do Pará, 2018) LEITE, Carlos André Esteves; MONTEIRO, Waldinei Rosa
The proper disposal of waste is essential for a more sustainable planet. This study analyzes waste management in a large company located in the Industrial Hub of Manaus, focusing on cost reduction and sustainability. The research identified opportunities for improvement, including the more noble disposal of wood, oil, and organic waste. The implemented actions led to cost reductions, improved compliance with environmental regulations, and enhanced sustainability in waste management practices.