Teses e Dissertações não defendidas no IFAL

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Navegando Teses e Dissertações não defendidas no IFAL por Área do Conhecimento "ENGENHARIAS"

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    Análise da comunicação no setor operacional usando equações estruturais: uma ferramenta de apoio ao gerenciamento da informação
    (UNIVERSIDADE FEDERAL DA BAHIA - UFBA, 2021-06-15) Drigo, Edmara dos Santos; Rodríguez, Jorge Laureano Moya; http://orcid.org/0000-0003-0541-0191; http://lattes.cnpq.br/5576711447768585; Ávila Filho, Salvador; https://orcid.org/0000-0002-5006-1501; http://lattes.cnpq.br/8080668192694401; Souza, Marcelo Embiruçu de; http://lattes.cnpq.br/8281601894113525; Rodríguez; Rodriguez, Carlos Manuel Taboada; https://orcid.org/0000-0003-2328-378X; http://lattes.cnpq.br/5905893327298080; Leite, Jandecy Cabral; https://orcid.org/0000-0002-1337-3549; http://lattes.cnpq.br/7279183940171317; Lima, Orlem Pinheiro de; https://orcid.org/0000-0003-1007-0734; http://lattes.cnpq.br/8148029403735260; Fontes, Cristiano Hora de Oliveira; https://orcid.org/0000-0001-8020-6815; http://lattes.cnpq.br/8533422209857268
    The absence of actions to manage information in the operational sphere (on the shop floor) affects the communication quality in this sector. Communication problems, in turn, can negatively impact operational security and organizational culture. Thus, this study proposed a model to analyze communication in the operational sector using the Structural Equation Modeling (SEM) technique. A mathematical model was presented, consisting of 1 exogenous latent variable, knowledge management, and 4 endogenous variables: (i) oral communication; (ii) written communication; (iii) Man interaction with information and communication technologies (ICTs); and (iv) the operational communication. The case study was carried out in a land-based oil production region in the Northeast of Brazil where data were collected through a structured questionnaire with a Likert scale response. After analysis using the SEM, and using the same database, a supplementary study was carried out based on the development of a neuro- fuzzy model to assess information management in the operational sector. The SEM confirmed 6 of the 9 hypotheses proposed in the theoretical model. The results obtained showed that operational communication is directly influenced by knowledge management and by man interaction with ICTs. Written communication and oral communication had a direct influence on man interaction with ICTs and had an indirect influence on operational communication, thus, communication on the shop floor occurs predominantly through technologies. Knowledge management had a direct influence on the 4 endogenous variables, with strong explanatory and predictive relevance effects. The result of the neuro-fuzzy model showed that information management on the shop floor improves as actions are taken to acquire, store and distribute information about the operational routine. The model presented relevant contributions to the refinement of theory and practical contributions to support information management on the shop floor.
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    Análise do discurso do operador e seu instrumento de comunicação entre turnos como ferramenta para o sistema de gestão
    (INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2016-06-06) Drigo, Edmara dos Santos; Oliveira, Cristiano Lessa de; http://lattes.cnpq.br/1436093029977246; Ávila Filho, Salvador; https://orcid.org/0000-0002-5006-1501; http://lattes.cnpq.br/8080668192694401; Marques, Sheyla Karolina Justino; https://orcid.org/0000-0001-7554-2275; http://lattes.cnpq.br/3917387578549073; Costa, Israel Crescencio da; http://lattes.cnpq.br/7663274879776157; Esquerre, Karla Patricia Santos Oliveira Rodríguez; https://orcid.org/0000-0001-8799-7365; http://lattes.cnpq.br/1956096628005272; Fleming, Paulo Victor; http://lattes.cnpq.br/1313976268089270
    Communication in organizations is still a difficult obstacle to be transposed. Effective instruments for transmission of information and the advent of technologies still need to rely on motivational and highly subjective factors that will make a man in his job routine report abnormalities or shut. Considering the operator discourse as a valuable tool for abnormalities display operational plan and support for decision-making in the management field, this dissertation aimed to analyze the communication between operators and shifts in a Water Treatment Plant (WTP) in the Northeast of Brazil. Problems in the information flow can result in operational failures in this case represent a risk to public health. The qualitative and quantitative analysis of records of operators and their communication tool show weaknesses in the shift book format used in WTP in question. The analysis of the text written by the operators based on analytical categories of Critical Discourse Analysis suggests the existence of conflicts that affect the organizational climate. We proposed a model instrument for communication in turn in checklist format to replace the typical procedure in narrative style. Although the focus of this work is the written speech, the operator’s speech in all its forms, can contribute significantly to the management system, but this management style should consider issues relating to human reliability and be willing to make procedure and structural changes.
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    Desenvolvimento de modelos preditivos para avaliação de paisagem sonora com base em levantamento na orla marítima da cidade Maceió-AL
    (2025) Santos, Jordana Teixeira da Silva Lima; Oiticica, Maria Lúcia Gondim da Rosa; Toledo, Alexandre Márcio; Cavalcante, Morgana Maria Pitta Duarte; Miranda, Erasmo Felipe Vergara; Michalski, Ranny Loureiro Xavier Nascimento
    In recent years, the field of soundscape studies has gained increasing prominence, driven by the need to transcend traditional approaches to urban environmental management that focus exclusively on noise control policies. Adopting a multidisciplinary perspective, the assessment of urban sound environments integrates both subjective variables, related to user perception and objective physical parameters inherent to the specific context and location. In this regard, the development of analytical tools capable of understanding and predicting perceptual responses to planning decisions through predictive modeling is essential. This doctoral thesis proposes a methodology for the evaluation of urban soundscapes based on the development of predictive models and their application in public spaces in the city of Maceió, Alagoas, Brazil, specifically along the seafront of the Ponta Verde and Pajuçara neighborhoods. The study adopts an applied research design, encompassing field data collection in accordance with the ISO 12913 normative series, including soundwalks, questionnaires, and acoustic measurements. A novel methodological approach is presented, involving the construction of a mixed questionnaire grounded in methods A and B of ISO/TS 12913-2, enriched with contextual and visual information. Furthermore, a procedure for acoustic environment characterization is proposed, aligned with ISO/TS 12913-3, and complemented by in-depth analyses of interrelations among perceptual and contextual factors. This is followed by correlation analyses and the identification of relevant indicators (empirical data) and descriptors (measures of perceptual response) for model development. The modeling framework comprises both linear predictive models (multiple linear regression) and nonlinear models (artificial neural networks – ANN). The ANN-based models demonstrated up to 35% greater predictive performance compared to linear models, with one model achieving a coefficient of determination (R²) of 0.98. The methodological advancements presented herein offer a significant contribution to the technological field of urban soundscape assessment, providing support for evidence-based decision-making by researchers and urban planners. This research expands the theoretical and practical horizons of soundscape studies by proposing innovative approaches for the characterization and predictive modeling of urban acoustic environments.
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    Eficiência energética e indicadores ambientais sobre o consumo de energia elétrica em uma edificação pública
    (2024) Rocha, Jean Jacques Bittencourt da; Souza, Mayara Andrade; Sant'Anna, Selenobaldo Alexinaldo Cabral de; Silva, Magno José Gomes da; Braga, Mauro Sérgio
    Unbridled energy consumption is one of the main causes of environmental problems that threaten life on Earth, such as climate change, air pollution, global warming, and greenhouse gases. Consequently, reducing CO2 emissions has emerged as a major modern global concern. Therefore, energy efficiency is seen as a fundamental step towards achieving sustainable development. Studies indicate that public buildings consume significant amounts of electricity and waste a lot of it, and that there is a direct connection between the energy use of buildings, their efficiency, and the improvement of their environmental sustainability indicators. Based on this scenario, a study aimed to evaluate the energy efficiency and environmental indicators of the electricity consumption of a public educational building. The study enabled the scientific production of a Book Chapter that aimed to evaluate the energy efficiency of a public building and environmental indicators based on energy consumption, using for this a case study at IFAL - Federal Institute of Science and Technology of Alagoas, Maceió campus, using as a methodology to quantify efficiency the Technical Regulation for the Quality of the Energy Efficiency Level of Commercial, Service and Public Buildings (RTQ-C) and in the evaluation of sustainability indicators applied to the ecological footprint and carbon footprint, thus proposing solutions to increase energy efficiency and reduce CO2 emissions. This study enabled the approval of the research project in PISIC 2003-2004, which allowed the integration of students and professors from the civil engineering and PPGASA courses of CESMAC, as well as contributions to the dissemination of the theme with publications of abstracts in annals and presentations, oral and on banners, of works in national and local congresses, where a bibliographic review, data collection, possible results and proposals for researched solutions were presented. As a technical production, a training course was held for students graduating from the electrical engineering course entitled “Energy consumption and environmental sustainability of a building”, with the objective of raising awareness among future industrial technicians in electrical engineering of the direct relationship between the consumption of electrical energy in a building and the influences on the environment, training professionals with a broader perspective of sustainability. In this training, teaching activities were used, increasing the direct involvement of students in the training, leading them to reflect on the degree of importance that professionals in this area influence the relationships of environmental sustainability on our planet. In view of the results obtained, the public school building was classified as having level B efficiency, contributing to CO2 emissions of 82.13 tons/ CO2/year through the consumption of electrical energy, resulting in a carbon footprint of 6.10 kg CO2/m²/year and an ecological footprint of 11.52 ha. Sustainable alternatives in the building regarding lighting, envelope and air conditioning systems imply a reduction of 26.52%, resulting in a saving of 395 MWh/year of energy, stopping the emission of more than 21,764 tons of CO2/year into the atmosphere.