https://repositorio.ufba.br/handle/ufba/556 2026-05-15T11:06:04Z 2026-05-15T11:06:04Z Pereira, Tatiane dos Reis Silva Woytysiak https://repositorio.ufba.br/handle/ri/44483 2026-05-12T18:25:10Z 2025-11-06T00:00:00Z

Título: Integração dos princípios do lean office e lean 4.0 na gestão acadêmico-administrativa: uma análise da percepção de valor dos estudantes de pós-graduação Autor(es): Pereira, Tatiane dos Reis Silva Woytysiak Primeiro Orientador: Barbosa, Ava Santana Abstract: The main objective of this study is to investigate how the integration of Lean Office principles and Industry 4.0 digital technologies can contribute to improving the quality and efficiency of academic and administrative management at higher education institutions, focusing on graduate students' perceptions of value. The research is based on the premise that the student experience is influenced by value attributes that can be optimized through lean practices and digital technologies. The methodology adopted is both qualitative and quantitative, involving a focus group followed by the administration of structured questionnaires and multivariate statistical analysis, highlighting the use of Principal Component Analysis to identify the latent structure of perceived value attributes. The data collected allowed us to map relevant dimensions of the academic and administrative experience, such as agility, reliability, accessibility, and personalized services. The results reveal that incorporating Lean 4.0 practices can promote significant gains in institutional efficiency, academic sustainability, and student satisfaction. Editora / Evento / Instituição: Universidade Federal da Bahia Tipo: Dissertação

2025-11-06T00:00:00Z Pinheiro, Maria Teresa Araujo https://repositorio.ufba.br/handle/ri/44286 2026-03-24T19:26:04Z 2026-03-06T00:00:00Z

Título: Bioprospecção de uma cianobactéria isolada no rio Joanes/BA para síntese de produtos visando aplicações biotecnológicas Autor(es): Pinheiro, Maria Teresa Araujo Primeiro Orientador: Sales, Emerson Andrade Abstract: Cyanobacteria represent the most diverse group of photosynthetic organisms on the planet and hold high potential for the discovery of novel bioactive compounds. Their pigments have well-established applications in food and nutraceutical products and also serve as valuable sources of proteins and other biomolecules. These characteristics broaden their potential use in sectors such as biofuels, food, animal feed, and, more recently, in the emerging field of phyconanotechnology. In this context, the aim of this study was to isolate a cyanobacterial strain from a river located in northeastern Brazil, analyze its potential for cyanotoxin production, and evaluate its application potential for obtaining bioproducts such as phycocyanin and carotenoids, as well as for the synthesis of carbon dots from laboratory-cultivated biomass and post-extraction residual biomass. The strain was isolated using a thermal method. Identification was carried out through a polyphasic approach, and cyanotoxin production potential was assessed by molecular and chemical methods (PCR and LC-MS²). Cultivation and growth kinetics were conducted under controlled temperature and light conditions to produce biomass, which was subsequently used for phycocyanin extraction, carotenoid identification, and carbon dot synthesis from residual biomass after bioactive extraction. The isolated and laboratory-cultivated strain was identified as Leptolyngbya boryana and was non-toxigenic. Phycocyanin extraction followed a protocol combining different solvents with freeze–thaw cycles. The most efficient extraction method employed calcium lactate at pH 9.47, yielding the highest phycocyanin content (153.24 mg/g of biomass). HPLC analysis revealed the presence of echinenone and chlorophyll a homologs in the biomass. Additionally, carbon dots were synthesized via a hydrothermal process from the cultivated species’ biomass (both before and after bioactive extraction), as well as from Chlorella vulgaris for comparison. Characterization of the carbon dot nanomaterials showed high fluorescence, photostability, and consistent performance in potential applications such as bioimaging, fluorescent sensors, and optoelectronic devices. Overall, the results indicate that the identified L. boryana strain possesses significant biotechnological potential, both for the production of phycocyanin and carotenoids and for the generation of nanomaterials of interest, highlighting the prospects for valorizing biomass into high-value products and commercial applications. Editora / Evento / Instituição: Universidade Federal da Bahia Tipo: Tese

2026-03-06T00:00:00Z Mendes, Allen Greyson Gomes https://repositorio.ufba.br/handle/ri/44099 2026-02-25T19:46:28Z 0004-02-01T00:00:00Z

Título: Estudo do estágio de maturidade da cultura de segurança de uma rede de revendas de GLP em Salvador - Bahia Autor(es): Mendes, Allen Greyson Gomes Primeiro Orientador: Gonçalves Filho, Anastácio Pinto Abstract: The Liquefied Petroleum Gas (LPG) distribution industry in Brazil faces significant challenges regarding operational safety, particularly within reseller networks. Despite the product’s importance for the national energy matrix and both residential and commercial supply, incidents related to inadequate handling, lack of standardized procedures, and the low maturity level of safety culture are still recurrent in part of the sector. In this context, the present study aimed to study the maturity stage of the safety culture in an LPG reseller network located in Salvador, Bahia. The research is grounded in well-established theoretical models that conceptualize safety culture as a set of values, practices, and collective behaviors that evolve through maturity stages. A mixed-methods approach was employed, combining quantitative and qualitative techniques. Data collection involved questionnaires covering six dimensions (leadership, commitment, involvement, information, communication, and organizational learning), along with a documentary evidence checklist. The sample consisted of 289 workers from 82 reseller companies. Results indicated an intermediate stage of safety culture maturity, between the reactive and bureaucratic stages, with significant variations across sociodemographic and organizational profiles. Positive correlations were identified between safety culture maturity and education level, age, and length of employment. Smaller resellers demonstrated higher levels of safety culture maturity. The findings suggest that advancing the maturity of safety culture within resellers depends on consolidating clear policies, implementing continuous training programs, and strengthening safety-oriented leadership. Furthermore, the development of monitoring tools and performance indicators is recommended to systematically track safety culture progress. This study contributes to the understanding of the current panorama of safety culture in the LPG distribution sector and provides practical insights for managers seeking to enhance operational reliability and reduce risks associated with reseller activities. Editora / Evento / Instituição: Universidade Federal da Bahia Tipo: Dissertação

0004-02-01T00:00:00Z Araujo, Andressa Clara Barbosa de https://repositorio.ufba.br/handle/ri/44096 2026-02-25T18:57:55Z 2026-01-28T00:00:00Z

Título: Utilização da simulação no contexto da Learning Factory: aplicação inserida na fase 1 do gêmeo digital Autor(es): Araujo, Andressa Clara Barbosa de Primeiro Orientador: Pimentel, Cristiane Agra Abstract: Industry 4.0 has driven profound transformations in production models, standing out for the use of enabling technologies such as simulation and digital twins. In this context, the objective of this dissertation was to develop a computational model representing the manufacturing flow of a product in a Learning Factory, using simulation as Phase I of the Digital Twin. The study is justified by the growing demand for industrial digitalization and by the lack of practical cases of implementation of technologies such as Digital Twins, especially in low-automation environments. Thus, the research proposes the use of simulation as an initial stage for the development of digital twins in Learning Factories, contributing to local innovation and to applied studies in the field. Methodologically, the study adopted an applied and explanatory approach, with a quantitative basis and technical procedures involving case study and action research. Discrete-event simulation was employed using the FlexSim® software, version 24.2.1. The model development followed DMAIC methodology (Define, Measure, Analyze, Improve, and Control), integrating Industry 4.0 concepts and emerging digital technologies. The simulated environment was a 60 m² Learning Factory with 19 workstations and capacity for 17 operators, arranged in a serial production layout. The results obtained from the simulation made it possible to validate the proposed Learning Factory layout and to perform productivity analyses based on simulated data, providing support for optimizing production flows without interventions in the real environment. The computational model proved viable for testing different improvement scenarios, anticipating bottlenecks, and facilitating the planning of physical and operational changes. Computational simulation is an efficient tool for the development of digital models of production environments, playing a strategic role in the first phase of Digital Twin implementation. The study highlights the importance of Learning Factories as innovation laboratories and demonstrates the applicability of simulation for process optimization and support for industrial digitalization, contributing to the advancement of Industry 4.0 in the national context. Editora / Evento / Instituição: Universidade Federal da Bahia Tipo: Dissertação

2026-01-28T00:00:00Z